Hanna Steinmüller

Hanna Skrollan Steinmüller (born 9 April 1993 in Münster) is a German politician of Alliance 90/The Greens and a member of the Bundestag for the constituency of Berlin-Mitte. The parliament lists her occupation as social scientist. Its published biography, drawn from her own statements, records that she is Roman Catholic, married and the mother of one child. She has held the Berlin-Mitte seat since 2021, when the 20th Bundestag was constituted on 26 October, and she was re-elected at the federal election of 23 February 2025, which returned the 21st Bundestag.

The same biography records an Abitur in Hanover, a voluntary service in 2011–12 at a facility for young disadvantaged adults in Berlin-Marzahn, and study of the social sciences at Humboldt University of Berlin on a scholarship from the Heinrich Böll Foundation, including semesters in Riga and Vienna. She joined the Greens in 2015, served on the Berlin state executive from 2016 to 2021, and sat in the district assembly of Berlin-Mitte from 2020 to 2021. Before her mandate she worked as personal assistant to Petra Vandrey, a member of the Berlin House of Representatives, and as a district business manager and campaign manager.

At the 2021 federal election the Greens received 45,870 first votes in Berlin-Mitte, 30.5 percent, ahead of the Social Democratic Party of Germany on 34,072 votes and 22.7 percent. A partial repeat of the Berlin poll on 11 February 2024 left that order unchanged: the revised table gave the Greens 42,443 first votes, 30.6 percent, and the Social Democrats 22.1 percent. In 2025 the constituency, renumbered 74, returned her with 40,672 first votes, 25.3 percent, ahead of Ottavia Stella Merendino of Die Linke on 38,521 votes and 24.0 percent. Second votes in the district that day placed Die Linke first, on 27.1 percent, and the Greens second, on 21.7 percent.

In the 21st Bundestag she is an ordinary member and Obfrau of the Committee on Housing, Urban Development, Building and Local Government, a deputy member of the Committee on Legal Affairs and Consumer Protection, and a deputy chair of both the German-Baltic and the German-Austrian parliamentary groups. On 23 September 2025, in the debate on the building ministry’s budget, she spoke from the lectern with her infant, born at the end of the previous December, asleep in a front carrier. Bayerischer Rundfunk reported the appearance as the first time a member had addressed the house from the lectern with a baby. Julia Klöckner, president of the Bundestag, wrote afterwards that Steinmüller had managed the moment with distinction and that she considered it acceptable, in some circumstances, for infants to be in the chamber.

Early life and education

Upbringing and school

Hanna Skrollan Steinmüller was born on 9 April 1993 in Münster, North Rhine-Westphalia. The biography published by the German Bundestag records her as Roman Catholic, and the parliament notes that this biographical text rests on the member's own statements. Those profiles give her name as Hanna Steinmüller. The longer form, Hanna Skrollan Steinmüller, is the one printed beside her on the leavers' list of the Hanover school where she took the Abitur.

The St. Ursula-Schule in Hanover, the Catholic Gymnasium where Hanna Steinmüller is listed among the 2011 Abitur graduates.

She completed secondary school in Hanover, Lower Saxony. The St. Ursula-Schule is a Catholic Gymnasium maintained by the Stiftung Katholische Schule in der Diözese Hildesheim. Its public list of Abitur classes includes "Hanna Skrollan Steinmüller" in the class of 2011, which dates the examination that the Bundestag biography records only as "Abitur in Hannover."

The archived biography for the 20th Bundestag states that, during her school years and her university studies, she took part in JANUN Hannover, in BUND Jugend Berlin, and in the parish council (Gemeinderat) of the Catholic student community in Berlin. That entry does not say which role belonged to Hanover and which to Berlin, and it does not describe particular projects or offices inside the groups. The biography for the 21st Bundestag no longer contains the passage.

Voluntary service and studies

From 2011 to 2012, after the Abitur, she did a voluntary service year (Freiwilligendienst) in a facility for young disadvantaged adults in Marzahn, a locality in eastern Berlin. Her curriculum vitae names the placement as Manege gGmbH in Berlin-Marzahn. Manege describes itself as a non-profit company at the Don Bosco Centre, run since 2005 as a cooperation of the German province of the Salesians of Don Bosco and the generalate of the Sisters of St Mary Magdalene Postel, and working in the borough of Marzahn-Hellersdorf in youth social work, vocational assistance for young people (Jugendberufshilfe) and other youth welfare.

She then studied social sciences at the Humboldt University of Berlin. The Bundestag biography states that the studies were supported by a scholarship from the Heinrich Böll Foundation and included semesters abroad in Riga and Vienna. The same biography lists her among the members of the association of former scholarship holders of the Heinrich Böll Foundation, and gives her occupation as Sozialwissenschaftlerin (social scientist). It does not name a degree title, the host universities, or the years of the exchanges.

Those details appear in the tabular curriculum vitae on her website. It lists a bachelor's programme in social sciences from 2012 to 2016, completed with a Bachelor of Arts; a master's programme in social sciences at Humboldt from 2016, still marked there as ongoing, with no completed master's degree, thesis title or examination grades recorded; an Erasmus+ semester in 2014 at the University of Latvia in Riga, during the bachelor's dates on that CV; and an Erasmus+ semester in 2018 at the University of Vienna, after those dates.

Party work and local politics

District organization and campaign roles

Steinmüller has been a member of Alliance 90/The Greens since 2015. Her tabular curriculum vitae dates two staff posts before she entered the Bundestag: from 2015 to 2017 as Kreisgeschäftsführerin, the business manager of a district association, and as a campaign manager, and from 2019 to 2021 as personal assistant to a member of the Abgeordnetenhaus of Berlin. The Bundestag biography records the same roles and does not name the district association.

In the side-activities record drawn from parliamentary disclosures, Abgeordnetenwatch identifies the assistantship as work for Dr. Petra Vandrey, MdA, and does not give that job a start month of its own. Vandrey, a Green, took her seat on 1 August 2019, succeeding Anja Schillhaneck, who resigned with effect from 31 July 2019.

Berlin state executive

On 3 December 2016 a congress of the Berlin Greens elected a new state executive. Nina Stahr and Werner Graf became the two chairs, Henning Bublitz treasurer and Rhea Niggemann spokesperson for women’s and gender policy; the assessors were Anja Engelmohr, Steinmüller and Andreas Audretsch. On 24 November 2018 delegates confirmed Stahr with 89 percent and Graf with 88 percent, re-elected Bublitz and the same three assessors, and chose Ina Rosenthal to succeed Niggemann.

The biography published for the 20th Bundestag, which the parliament says rests on members’ own information, gives Steinmüller’s board responsibilities as the integration of new members and European affairs, and adds that she was the state party’s diversity officer from 2018 to 2020. The same text records that from 2019 to 2021 she was spokesperson of the Landesarbeitsgemeinschaft Gesundheit und Soziales, the Berlin Greens’ state working group on health and social affairs.

For the 2019 European Parliament election in Germany she stood on the Greens’ federal list in 33rd place, between Holger Haugk and Nadine Milde, on the slate the party published with Ska Keller and Sven Giegold at its head. Abgeordnetenwatch likewise lists her 2019 candidacy on the federal list at position 33. The Federal Returning Officer’s final result gave the party 20.5 percent of the valid votes and 21 of Germany’s 96 seats in the European Parliament, so 33rd place was not enough for a mandate. The Berlin Greens afterwards congratulated the candidates from the state who did enter the Parliament and thanked Steinmüller, Ricarda Lang and Janik Feuerhahn for their campaign work.

At a state delegates’ conference at the end of October 2020 the sitting seven-member executive, Steinmüller included, was returned for another two years without opposing candidates. taz reported that party rules exclude members of parliament from the state executive, as they exclude members of government, and that Steinmüller, Stahr and Audretsch were prospective Bundestag candidates who were therefore likely to leave the board. The parliamentary biography dates her membership of the Landesvorstand from 2016 to 2021.

District assembly of Mitte

Steinmüller was not among the Greens returned to the Bezirksverordnetenversammlung of Mitte, the borough assembly, at the 2016 election. The state returning officer’s list of those elected names fourteen Green members for Mitte, including Stephan von Dassel and Sabine Weißler. She took a seat in April 2020, during that term, and served until 2021 as the Green group’s spokesperson for climate and environmental policy.

A Berliner Zeitung profile in October 2021, written after she had won the federal constituency of Berlin-Mitte, described that borough work as concerned above all with more greenery in the city and with climate policy, and noted that she had not been a member of the state parliament before moving to the Bundestag. In her own account of the same period she has tied the climate brief to unequal exposure, writing that people on low incomes more often live on noisy streets and bear more heat and stress.

Bundestag elections

Candidacy and the 2021 election

The Berlin-Mitte district association of Alliance 90/The Greens nominated Hanna Steinmüller for the Bundestag on 4 October 2020. At a members' meeting in the Poststadion she received 154 votes, with 30 against, and defeated the former member of parliament Özcan Mutlu; she was then on the party's Berlin state executive. The Federal Returning Officer listed her, a research associate born in 1993, as the Green candidate in constituency 75 and ninth on the Berlin state list. The same register named Annika Klose for the Social Democratic Party of Germany, Martin Neise for Die Linke, Ottilie Klein for the Christian Democratic Union of Germany, Anna Kryszan for the Free Democratic Party and Beatrix von Storch for the Alternative for Germany.

In the 2021 German federal election on 26 September 2021, constituency 75 had 207,483 eligible voters. Of them, 152,506 voted, a turnout of 73.5 percent, and 150,210 first votes were valid. Steinmüller received 45,870, or 30.5 percent, 12.6 points above the Greens' 2017 share in the constituency. Klose was second with 34,072 votes (22.7 percent), then Neise with 21,291 (14.2 percent), Klein with 20,002 (13.3 percent), Kryszan with 10,038 (6.7 percent) and von Storch with 7,597 (5.1 percent). Of 150,419 valid second votes, the Greens took 46,120 (30.7 percent) and the SPD 32,133 (21.4 percent). The Federal Returning Officer recorded the Greens as elected in the constituency.

The 2024 partial repeat in Berlin

Berlin held the federal election on the same day as elections to the Abgeordnetenhaus and the borough assemblies and a referendum, while the Berlin Marathon was also run. The Federal Constitutional Court later described missing or wrongly delivered ballot papers, polling stations that were interrupted or closed, and queues long enough to show that stations had not been equipped for a smooth poll. Of 1,713 objections concerning Berlin, the Bundestag on 10 November 2022 declared the election invalid in 431 districts — 327 polling districts where it found errors capable of affecting seats, plus 104 districts linked by shared postal ballots — and ordered a repeat there.

On 19 December 2023 the Second Senate, in case 2 BvC 4/23, held that the Bundestag had not examined the polling-station minutes adequately. It invalidated the election in a further 31 districts and their postal districts, restored seven districts and their postal districts, and, after postal-count irregularities that surfaced following the hearing, added six postal districts and six connected polling districts. The repeat was to use both votes and only the affected districts: 455 of Berlin's 2,256. The court applied the rule of the least possible intervention and did not annul the election citywide or by whole constituency.

The partial repeat was held on 11 February 2024. In constituency 75 it covered 34 polling districts and 17 postal districts; the other districts kept their 2021 results. The revised result had 207,010 eligible voters and 140,655 voters, turnout of 67.9 percent, 5.6 points below the original poll. The Greens received 42,443 first votes (30.6 percent, up 0.1 point) and the SPD 30,611 (22.1 percent, down 0.6). The constituency winner did not change. On 1 March 2024 the Federal Electoral Committee redetermined the national result. The Bundestag fell from 736 to 735 seats because the FDP lost one. The Greens lost one Berlin list seat and gained one in North Rhine-Westphalia, remaining at 118; the SPD and Die Linke each lost a Berlin list seat offset in another Land.

The 2025 election

The election to the 21st Bundestag was held on 23 February 2025, after the Federal President dissolved the 20th Bundestag on 27 December 2024. Berlin-Mitte was constituency 74. On 14 December 2024 the Berlin Greens placed Steinmüller fourth on the state list and again named her for Mitte; the district associations had already chosen the constituency candidates.

A statute of 8 June 2023, published on 13 June 2023, fixed the Bundestag at 630 members and introduced Zweitstimmendeckung, or coverage by second votes. Under sections 1 and 6 of the Federal Elections Act, a party candidate wins a constituency seat only with the most first votes and only if that seat is among those the party's state list draws from second votes. Winners in a Land are ranked by their share of valid first votes, and the list's seats go in that order; any remainder follows the list. The Federal Returning Officer states that the rule applied from the 2025 German federal election, so a plurality alone no longer produced a seat.

Constituency 74 had 207,445 eligible voters and 161,865 voters, turnout of 78.0 percent, with 160,822 valid first votes. Hanna Skrollan Steinmüller received 40,672, or 25.3 percent, 5.3 points below the Greens' revised 2021 share. Ottavia Stella Merendino of Die Linke was second with 38,521 votes (24.0 percent). The SPD, with Klose again the candidate, took 26,816 (16.7 percent), the CDU 22,933 (14.3 percent), the AfD 13,706 (8.5 percent), the Bündnis Sahra Wagenknecht 8,012 (5.0 percent) and the FDP 4,586 (2.9 percent). Of 160,986 valid second votes in the constituency, Die Linke led with 43,614 (27.1 percent), ahead of the Greens on 34,920 (21.7 percent).

That local second-vote result did not decide coverage. The Federal Returning Officer lists three Green constituency winners in Berlin, by descending first-vote share: Julia Schneider in Pankow (25.8 percent), Steinmüller in Mitte (25.3 percent) and Moritz Heuberger in Tempelhof-Schöneberg (24.7 percent). All three are recorded as elected in their constituencies, so the Berlin list's seats covered Steinmüller's plurality. Lisa Paus and Andreas Audretsch, list places 1 and 2, entered from the list.

Parliamentary offices

The 20th Bundestag

Hanna Steinmüller, whose occupation is given as social scientist, sat for Alliance 90/The Greens in the 20th Bundestag as the directly elected member for Berlin-Mitte, then numbered constituency 075. That electoral term began with the constitutive sitting on 26 October 2021 and ended when the 21st Bundestag first met on 25 March 2025. Under the Basic Law a term ends only when the next Bundestag assembles, and the new parliament must meet no later than the thirtieth day after the election; the Bundestag dates the start of a term from that constitutive sitting. The archived biography records that she won the Berlin-Mitte mandate again at the partial repeat election in Berlin on 11 February 2024.

For the 20th term the membership record lists her as an ordinary member of the Ausschuss für Wohnen, Stadtentwicklung, Bauwesen und Kommunen, and as a deputy member of the Ausschuss für Arbeit und Soziales, the Ausschuss für Digitales and the Haushaltsausschuss. It does not list her as Obfrau of the housing committee. The archive uses that official committee title; in the 19th Bundestag the predecessor body was the Ausschuss für Bau, Wohnen, Stadtentwicklung und Kommunen. Her self-supplied biography, still printed on the current member page, instead names an "Ausschuss für Wohnen, Bauen, Stadtentwicklung und Kommunen" and adds a deputy seat on the Rechtsausschuss alongside labour and social affairs, the budget and digital affairs. Neither that legal-affairs seat nor the wording "Bauen" appears in the archived membership block.

The Bundestag's list of parliamentary-group boards for the 20th term names her a deputy chair of the Deutsch-Baltische Parlamentariergruppe, the contact group for Estonia, Latvia and Lithuania, and of the Deutsch-Österreichische Parlamentariergruppe, the group for relations with Austria. From 19 September 2023 the term's register of outside offices lists her as a deputy member of the board of trustees (Stiftungsrat) of the Bundesstiftung Bauakademie.

The 21st Bundestag

She returned at the election of 23 February 2025 as the directly elected member for Berlin-Mitte, renumbered constituency 074, and took the new seat when the 21st Bundestag was constituted on 25 March 2025. The parliament's current membership block lists her as an ordinary member and as Obfrau of the Ausschuss für Wohnen, Stadtentwicklung, Bauwesen und Kommunen — the same official name as in the previous term — and as a deputy member of the Ausschuss für Recht und Verbraucherschutz. In Bundestag usage an Obfrau or Obmann is not the committee chair but the member appointed by one parliamentary group on one committee as that group's main contact with its leadership. Each group names one per committee; the Obleute shape the group's line in committee, settle agendas and report the state of the detailed work back to the group.

At the housing committee's constituting sitting on 21 May 2025, opened by Vice-President Bodo Ramelow, the Bundestag listed four Green ordinary members — Timon Dzienus, Sylvia Rietenberg, Steinmüller and Kassem Taher Saleh — and recorded the election of Caren Lay of Die Linke as chair. That report did not name the groups' Obleute; the Obfrau designation is on the later membership record. The same record lists her again as deputy chair of the German-Baltic and German-Austrian parliamentary groups. Within the Green parliamentary group, rather than as an office of the Bundestag itself, the group identified her in May 2026 as its Berichterstatterin für Wohnen und Mieten.

The register of notifiable positions still records the Bauakademie deputy trusteeship. The foundation's own list names Kassem Taher Saleh as the Greens' full member of the Stiftungsrat, which decides matters of importance to the foundation, and Steinmüller as deputy. The register also records membership of the board of the Deutsche Parlamentarische Gesellschaft from September 2025 and membership of the advisory board of Verband Wohneigentum e.V. from 30 April 2026.

Housing and urban development

Rent law and tenant protection

In the 21st Bundestag, Steinmüller is an ordinary member and the Obfrau of Alliance 90/The Greens on the Committee on Housing, Urban Development, Building and Local Government. Her rent arguments have turned on the gap between regulated tenancies and new listings in tight markets, including Berlin-Mitte. The Investitionsbank Berlin put the 2025 median asking rent in Mitte at €20.00 per square metre net cold, against €15.78 for Berlin.

At the first reading on 5 June 2025 she thanked Justice Minister Stefanie Hubig for tabling an extension that her predecessor Marco Buschmann had not produced, and said that extending the rent brake (Mietpreisbremse) alone would not do. She called it “as holey as a Swiss cheese”: too little known — on her account of a Munich survey of 10,000 households, 25 percent could have challenged the rent and 2.4 percent had — and easy to sidestep through an unseparated furniture surcharge, the post-2014 new-build exemption, short contracts and heavy refurbishment. On 26 June, in the final debate, she contrasted a cold rent of €5.50 in Forst with Moabit, where she said 70 percent of ImmoScout listings were at €20 to €35 a square metre. A claim that average rents in Germany had not risen was, she said, “like putting your feet in ice water and your head in the oven,” and the idea that new building alone could fix a stock-dominated market was “humbug.” She put 26 million people in tight markets and closed: “Do something. Extending it, and nothing more, is not enough.”

The alternative she pointed to was the Faire-Mieten-Gesetz, Drucksache 21/222 of 20 May 2025, introduced by Till Steffen, Steinmüller and other Green members. In designated tight markets it would have made permanent the 10 percent cap on new rents over the local reference rent. A furniture surcharge would have had to be itemised and limited to 1 percent a month. The new-build exemption would have covered only homes used and let for at most one year; index-linked rises would have followed the national net-cold-rent index; and increases for sitting tenants in tight markets would have been capped at 9 percent over three years rather than 15. Personal-need notices (Eigenbedarf) would have been limited to the landlord and close family, and in tight markets a buyer could not serve one for five years. The memorandum cited the German Economic Institute for new-contract rents from 2022 to 2024, including a rise of 22.2 percent in Berlin.

The coalition’s Drucksache 21/322 only prolonged the power to designate tight markets until the end of 2029 and kept the exemption for homes first let after 1 October 2014, arguing, with reference to the Federal Constitutional Court, that extra supply would not ease markets quickly. CDU/CSU, the SPD and the Greens voted for it; the AfD voted against and the Left abstained. Haus & Grund president Kai Warnecke called the brake a “political fetish” and said it did more harm than good. GdW president Axel Gedaschko said braking while ministers spoke of a building turbo was the wrong signal, while welcoming the decision not to cover homes built up to 2019. The German Tenants’ Association welcomed four more years for about 32 million people, but wanted exceptions and furnished and short-let routes closed, noting that furnished flats were on average 45 percent dearer. Berliner Mieterverein director Wibke Werner asked that the brake be made permanent, or given at least ten years, citing 15,362 Berlin completions in 2024 against a city target of 222,000 homes by 2040.

On 22 February 2026 Der Spiegel reported a further Green proposal: a five-year bar on personal-need eviction after a tenant had enforced the brake, and a nationwide rather than locally designated brake. Steinmüller said it would “take away tenants’ fear of asserting their rights,” and that landlords who kept the rules could still register a justified personal need. On 29 April 2026 the cabinet adopted Hubig’s “Miete II” bill: in tight markets, consumer-price increases above 3.0 percent a year would count only half toward an index-linked rise, alongside new rules for furnished lets and short contracts and a wider arrears grace period.

Social and non-profit housing

A written question Steinmüller and other Greens tabled on 5 March 2026, Drucksache 21/4553, called the return of non-profit housing status (Neue Wohngemeinnützigkeit) on 1 January 2025 a bright spot after its abolition in 1990, and said the coalition had not introduced investment grants promised in its agreement. Citing the Pestel Institute, it put the stock at about one million social or non-profit homes against about 11 million eligible households, and said that more than tripling federal funds had raised subsidised social homes by only 32 percent while the stock still fell. The government replied on 19 March that ways of promoting the status were “currently being examined.” It had no usable count of bodies using section 52(2) no. 27 of the Fiscal Code, said no evaluation was planned, and was still defining the required discount to the local market rent. Federal aid to the Länder was €3.5 billion for 2025 and €4 billion for 2026, rising in the plan to €5.5 billion by 2028. About 62,000 units were funded in 2024, while roughly 55,000 social rental homes a year might leave their controls.

Building, conversion and local government

On 9 October 2025 the Bundestag passed the coalition’s Act to Accelerate Housing Construction and to Secure Housing, with CDU/CSU and the SPD in favour and every other group, including the Greens, against. Housing minister Verena Hubertz said a municipality could clear a scheme in three months rather than spend five years on a development plan, and could require a share of social housing. The ministry said the act allows departures from planning law for housing and strengthens the bar on converting rental blocks into owner-occupied flats.

A Green motion Steinmüller co-signed, Drucksache 21/2113, was rejected the same day. It asked for section 246e of the Building Code to be deleted, arguing that a shortcut permit would neither force construction nor impose a social test and could raise land values for resale. Easier rules should apply above all to extending or converting existing homes, offices and commercial buildings — an “Umbauturbo” — and only where at least half the homes were socially bound or non-profit and tied to an order to build. It also sought a six-month deemed consent, an open-ended limit on rental-to-freehold conversion, and restored municipal pre-emption in Milieuschutz areas. GdW had in June asked instead for a “real building turbo,” and without it called the rent brake a “permanent braking manoeuvre.”

On 9 June 2026 Steinmüller co-signed Drucksache 21/6341, on turning empty offices into homes. It cited Pestel for a shortage of 1.4 million homes at the end of 2024 against about 200,000 completions a year, and the ZIA spring report for 12.5 million square metres of vacant offices at the end of 2025. It welcomed a federal commercial-to-housing programme due on 1 June 2026 but said a cap of ten homes per project would not unlock that stock, and asked for a model building code rewritten around conversion and for tax changes so that lasting vacancy in tight markets would no longer be treated like conversion.

Other legislative work

Legal affairs and consumer protection

In the 21st Bundestag, Hanna Steinmüller has since 25 March 2025 been a deputy member of the Committee on Legal Affairs and Consumer Protection. Her full seat is on the housing committee. The committee deals with legal policy, including family, copyright and criminal law, and with consumer questions such as passenger rights, banking and online contracts, and Bundestag participation in proceedings before the Federal Constitutional Court. Groups nominate members and substitutes, who may attend every sitting but vote only when replacing an absent full member of their own group.

The documentation system records no plenary speech or written question by her on general consumer protection. In the government’s questioning hour her exchanges with justice ministers stayed on tenancy law. On 6 November 2024 she asked Justice Minister Marco Buschmann about extending the rent brake, caps on increases and furnished lettings. On 15 April 2026 she asked Justice and Consumer Protection Minister Stefanie Hubig about enforcing the rent brake, including a Green proposal to bar notices of personal need for five years after a successful claim, and about commercial rents.

Elsewhere she appears mainly as one name among many signatories. Cross-party texts include a bill of 3 March 2022 on vaccination of adults against SARS-CoV-2 (Drucksache 20/899); a bill of 17 June 2022 on a right to a self-determined death, after the Federal Constitutional Court’s judgment of 26 February 2020 (20/2293); a motion of 5 July 2023 on suicide prevention (20/7630); and a bill of 14 November 2024 to re-regulate abortion (20/13775). On 13 August 2026 she signed a cross-party bill to introduce an opt-out rule into the Transplantation Act (21/7570).

On 6 December 2024 she was among Alliance 90/The Greens members who moved that the Bundestag find the Alternative for Germany unconstitutional under Article 21(2) of the Basic Law (20/14105). With two colleagues she filed a § 31 explanation on the 18 January 2024 returns act, doubting restrictions of fundamental rights and opposing any criminalisation of sea rescue. On 27 June 2025, intervening on the nationality law, she said 37 percent of residents in her Berlin-Mitte constituency had no German citizenship and asked how withholding their vote could be justified. On 9 June 2026 she co-sponsored, with the Green group, a motion to strengthen the General Equal Treatment Act twenty years after it took effect (21/6337).

Labour, the budget and digital policy

In the 20th Bundestag the archived biography lists her, from 26 October 2021 to 25 March 2025, as a deputy member of the committees on labour and social affairs, digital affairs and the budget. It does not list the legal committee, and the 21st-term biography does not continue those three seats. Those committees cover pensions, labour-market policy and inclusion; network policy and digital infrastructure; and the annual federal budget and its execution.

Her budget speeches, on 6 September 2022, 30 January 2024, 10 September 2024, 23 September 2025 and 10 September 2026, were on the housing ministry’s estimates. Nothing in the documentation system is indexed to digital policy as such. The nearest papers she co-signed are a Green motion of 13 January 2026 on “fair, digital and socially just” parking, including data protection in digital parking control (21/3610), and a 25 March 2026 amendment to allow social criteria in resident-parking fees (21/4986).

On social security she is a named questioner, with the Green group, on the small inquiry of 27 January 2026 about the subsistence minimum in a planned new basic-income scheme. The inquiry says a government bill would replace Bürgergeld and shift the benefit toward duties, sanctions and exclusions, including withdrawal of housing costs (21/3815). She co-sponsored a Green motion of 9 June 2026 on skilled immigration (21/6346) and two BAföG motions: one of 15 October 2025 citing 612,800 recipients in 2024, the lowest since 2000, and one of 5 May 2026 calling for a higher grant because housing costs often exceeded the BAföG lump sum (21/2234 and 21/5780). She also co-signed Green texts on tax “justice gaps” (21/356) and inheritance tax (21/1683).

No written question by her on child poverty is listed. Where a plenary remark touches poverty, it does so through housing costs: on 17 December 2025 she cited a Paritätischer Gesamtverband study putting 18.4 million people at risk of poverty once housing costs are included, while asking the chancellor about a rent-law amendment.

Public profile and reception

Media presence

National reporting on Hanna Steinmüller, the Bündnis 90/Die Grünen member for Berlin-Mitte, treated her for most of the 21st Bundestag as a housing voice. In June 2025 BR24 quoted her against the federal "Bau-Turbo", which she called a "Teuer-Turbo" for lack of rules to keep new homes affordable. During the 2025 campaign the Tagesspiegel ran a portrait, "Wahlkampf statt Mutterschutz", on canvassing in Mitte with an infant.

On 23 September 2025 the lectern photograph overtook that coverage. Die Zeit ran a news report and a family interview; the Frankfurter Allgemeine Zeitung, Der Spiegel, Bayerischer Rundfunk, the taz and the Tagesspiegel led on the sitting rather than on the budget line. She told the taz she wished her specialist subjects drew as much notice as a photograph with a baby carrier, and that Instagram posts on combining a mandate with family life were shared more often than policy posts.

The September 2025 speech with an infant

On Tuesday 23 September 2025, in the 26th sitting of the 21st Bundestag, Steinmüller spoke in the first reading of Einzelplan 25, the draft for housing, urban development and building, with her son in a front carrier. The Bundestag wrote on Instagram that a member had stood at the lectern with a baby for the first time; the Frankfurter Allgemeine Zeitung, Bayerischer Rundfunk and Die Zeit reported it in those terms. She had announced the birth at the end of December 2024; the Tagesspiegel described the child, who slept through the speech, as ten months old.

She told the taz it was unplanned. A colleague had offered to take the child; she would not put him down because he would fuss. She looks after him two days a week, and Tuesdays are normally group meetings, so she spoke only because of budget week. She had brought him into the chamber before, but not to the lectern, and that evening called it a "wilder Tag".

The speech was about budget lines, not childcare. "Reden ist Silber, und Haushaltstitel sind Gold," she said. Germany was ageing and people should stay at home, but the government had scrapped the KfW grant "Altersgerecht Umbauen", so help to convert a bath or fit a stair lift was gone; CDU member Jan-Marco Luczak interjected that the programme had already been missing from the previous coalition's budget. A doubling of "Junges Wohnen" was not due before 2027, and a coalition "WG-Garantie" was not funded; a shared room would average 500 euro, against 380 euro in BAföG. An investment grant for the new non-profit housing status was unfunded too. The recording is in the Bundestag mediathek.

Julia Klöckner, president of the Bundestag, wrote that Steinmüller had managed mother, infant and childcare "bravourös", and that infants in the chamber were defensible in some circumstances. A spokesperson told BR24 that babies may come in after agreement with the chair, and that a play, nursing and changing room already stands nearby. Steinmüller told the taz that, despite their differences, Klöckner allowed more compatibility than before. Katharina Schulze told BR24 the picture normalised working mothers. The taz reported messages accusing her of instrumentalising the child or asking where the father was, and a Focus frame of "PR-Show" versus family-friendliness. Days earlier she had written of a 40-hour week that ignores families, a part-time trap that hits women, and a daycare crisis.

Debate over housing positions

On 26 June 2025, in the debate on extending the Mietpreisbremse, she said a mere prolongation was not enough. She described furnished lets, sublets used to weaken eviction protection, and single rooms let so the total rent could not be checked; 26 million people lived in tight markets, not only in Munich, Frankfurt, Cologne and Berlin, and Mitte's planning office had urged action on tenancy law and furniture. The Bundestag extended the brake to the end of 2029 with the CDU/CSU, the SPD and the Greens; the AfD voted no and the Left abstained. She co-sponsored the Greens' Faire-Mieten-Gesetz, also debated that day.

A Deutsche Presse-Agentur report placed her objection next to the other camps. Kai Warnecke of Haus und Grund called the brake superfluous: overpricing was mainly an online-portal problem, energy costs mattered more than the basic rent, and the rule left less money for renovation. Luczak said a chief physician gained as much as a nurse, called the brake transitional, and warned against tightening that would hurt landlords' planning certainty. SPD member Hakan Demir said it slowed rises only moderately and that his group had wanted more. The Deutscher Mieterbund called the extension essential in 492 municipalities but not enough, asking for nationwide scope, fewer exceptions and real fines.

On the Bau-Turbo, BR24 set her against Building Minister Verena Hubertz, who spoke of a "Brechstange" to let municipalities allow building if nobody objected within two months. Steinmüller said a limit to tight markets had been dropped, so building could be allowed where there was no need, and that without "soziale Leitplanken" the measure would be a "Teuer-Turbo". The Mieterbund separately said the temporary rule lacked social compatibility.

Personal life and affiliations

Family and residence

Hanna Steinmüller was born on 9 April 1993 in Münster. The biography published by the Bundestag, which notes that such biographical details rest on members' own statements, records her as Roman Catholic, married, and the parent of one child; it does not name a spouse or the child. Coverage of her plenary speech on 23 September 2025 identified the child as a son born in December 2024. Die Zeit wrote that she had been the mother of a son since December 2024, and a Deutsche Presse-Agentur report carried by the Süddeutsche Zeitung said she spoke with that son in a baby carrier. Der Spiegel reported that she had made the birth public at the end of December.

The same biography places her voluntary service, university study, party offices and constituency work in Berlin and does not publish a private home address. It lists a constituency office at Oldenburger Straße 33, 10551 Berlin, a street in the locality of Moabit, and a Bundestag office at Platz der Republik 1, 11011 Berlin.

Memberships and disclosed offices

In that self-reported biography she lists membership of ver.di, the Vereinte Dienstleistungsgewerkschaft, a services-sector trade union; the Berliner Mieterverein, a non-commercial tenants' association; Europa-Union Deutschland, a non-partisan citizens' association for European unification and the German section of the Union of European Federalists; Moldovahilfe e.V., which supports social, educational and medical projects in Moldova; the Bürgerverein Hansaviertel, founded in 2004 around the Hansaviertel and the Interbau 1957 exhibition; and the Verein Ehemalige Stipendiat*innen der Heinrich-Böll-Stiftung, an alumni association of the Heinrich Böll Foundation's scholarship holders, founded in 2007.

She is also listed as a supporting member of Sea-Watch e.V., which conducts civilian search and rescue in the Mediterranean, and as a member of three cooperatives: SuperCoop Berlin, a member-run supermarket, and the fair-trade world shops ZeichenDerZeit, a cooperative since 2014, and Sophienfair (Sophiefair Weltladen Mitte eG).

The Bundestag separately publishes offices that members must disclose under sections 45 and following of the Members of the Bundestag Act. She is a deputy member of the board of trustees of the Bundesstiftung Bauakademie in Berlin, a charitable federal foundation created in 2019 to operate a future Bauakademie on the site of Karl Friedrich Schinkel's building and to work on sustainable planning and construction; the foundation lists her as the deputy Bundestag representative of Alliance 90/The Greens. From September 2025 she is recorded as a board member of the Deutsche Parlamentarische Gesellschaft e.V. in Berlin, whose statutes, as summarized in the Bundestag data handbook, aim to maintain personal, professional and political relations among members of the federal, state and European parliaments. From 30 April 2026 she is recorded as a member of the advisory board of the Verband Wohneigentum e.V. in Bonn, which describes itself as a consumer-protection association for people living in their own house or apartment; the association's advisory-board page includes her among its parliamentary members.