In short
- Apply with „Jetzt bewerben“ on the flat's page at gesobau.de. It opens the flat at Immomio, where you sign in or open an account.
- Confirm your email if your Immomio account is new. Its email „E-Mail-Adresse bestätigen“ is in German: tap its button within 3 days, or the account is deactivated. Only then does „Bewerbungseingang erfolgreich“ say your application arrived.
- Complete your profile at Immomio: your household, your income and your WBS. If Immomio asks you to verify your phone number by SMS, do it.
- Book a viewing slot from the email „Einladung zum Besichtigungstermin“ at once: there are few, and once they're taken there are no more for now.
- The viewing. Bring your ID. Without it, and without the viewing, Gesobau doesn't consider your application.
- Send your documents in Immomio: only those Gesobau asks for, by the date it sets.
- The answer: a yes or a no.
Sources: Gesobau, flat search · Gesobau, how letting works · Gesobau's emails to an applicant through Immomio, May to November 2026
1. Applying on Immomio
Gesobau takes every application through Immomio, a letting platform. On a flat's page at gesobau.de, the button „Jetzt bewerben“ opens the flat at Immomio. Sign in there, or open an account.
One account per person: Gesobau doesn't allow several accounts applying for the same flat. People who want to move in together are counted as one application.
Read the flat's description before you apply: many flats are only for some households. See "Who a flat is for" below.
Sources: Gesobau, flat search · Gesobau, how letting works
2. Confirming your email
Right after you open the account, Immomio sends an email with the subject „E-Mail-Adresse bestätigen“ (confirm your email address). It is in German, from an address at immomio.de, under the name Immomio or GESOBAU AG. Tap its button „E-Mail-Adresse bestätigen“. If you don't within 3 days, the account is deactivated.
Only after the tap do two more emails follow: „Registrierung erfolgreich“ (registration successful) and „Bewerbungseingang erfolgreich“ (application received). The second says that Gesobau's letting team can now offer you a viewing.
No email? Look in your spam folder.
Source: Gesobau's emails to an applicant through Immomio, May and November 2026
3. Your profile and your phone
In your Immomio profile you add your household, your income and the earliest day you could move in. You decide what Gesobau sees, and when. If you have a WBS, choose its level, upload it and give the number of people it is for. Asked about a guarantor, answer "no": Gesobau doesn't accept guarantees.
Gesobau may also ask you to verify your account, in the email „Bitte verifizieren Sie Ihr Konto“ (please verify your account) or „Alle Daten korrekt? Verifizieren Sie Ihr Konto!“. Its button leads to a code that Immomio sends by SMS to the phone number you gave. Gesobau asks for it so that it can consider your application properly and knows your contact details are current. Do it when the email comes.
Immomio's section „Service“ is Immomio's own offer: it has nothing to do with Gesobau and doesn't change which flats you're offered. Don't buy a SCHUFA report either: Gesobau gets one for free.
Sources: Gesobau, guide to registering at Immomio · Gesobau, how letting works · Gesobau's emails to an applicant through Immomio, October 2026
4. Booking the viewing
If your profile suits the flat, the email „Einladung zum Besichtigungstermin“ (invitation to a viewing) asks you to choose a free slot in your Immomio account: „Besichtigungstermin wählen“. Choose one as soon as the email comes. Gesobau offers only a few slots, and once they are all taken, there are no more dates for now.
Gesobau sometimes adds slots later: the email „Neuer Besichtigungstermin“ (new viewing date) asks you to choose one and confirm it.
Let your phone tell you when mail comes to the address of your Immomio account: the invitation shouldn't wait in your inbox.
Sources: Gesobau, flat search · Gesobau, how letting works · Gesobau's emails to an applicant through Immomio, May and June 2026
5. The viewing
Bring your ID card or another official ID: a passport, a residence permit or a Duldung. Gesobau checks your identity on site. Someone else can go for you if they are of age and bring your written authority (Vollmacht).
Without a valid ID, and without the viewing, Gesobau doesn't consider your application.
Sources: Gesobau, how letting works · Gesobau's emails to an applicant through Immomio, May 2026
6. Saying yes, and your documents
Still want the flat after the viewing? Say so in Immomio („Feedback abgeben“) and add your documents to your profile. Send only the documents Gesobau asks for, complete and by the date it sets, and no originals.
What Gesobau asks for:
- from your current landlord, a certificate that you owe no rent (Mietschuldenfreiheitsbescheinigung); students and apprentices, their parents' confirmation that they live rent-free; owners, an extract from the land register;
- employed: your last three payslips, or the contract of your new job. No bank statements;
- retired, on benefits or self-employed: the proof Gesobau's page names for each;
- students and apprentices: proof of enrolment or training, and the BAföG or BAB notice.
Private photos make no difference to who gets a flat, and Gesobau advises against uploading them.
What a landlord may ask for, and when, is in our guide Applying for a flat.
Sources: Gesobau, how letting works
7. The answer
Gesobau checks your documents and chooses by social criteria, a balanced mix of residents and the rules for Berlin's state-owned housing companies. Meeting every condition gives no right to a flat.
You then get a yes (Zusage) or a no (Absage). When a flat has gone to someone else, the email may only say „Objekt nicht mehr verfügbar“ (the property is no longer available).
If you get the flat, the deposit is three months' net rent (Kaltmiete); the listing gives the sum.
Keep a search profile at Immomio: Gesobau then sends you offers that suit it. You still apply for each flat you're offered.
Sources: Gesobau, how letting works · Gesobau, flat search · Gesobau's emails to an applicant through Immomio, June and November 2026
Who a flat is for
When we checked, every Gesobau listing said „WBS: nein“ (no WBS needed). Its description decides: several were let only to a household without a WBS entitlement („ohne WBS-Anspruch“), one only to a household whose income would qualify for a WBS, and many named the household's size, a minimum income, or an age from 60 or 65.
Gesobau also asks that the net rent be no more than 27 % of your household's net income, that you be at least 18, and that a residence permit still be valid for 6 months when the lease starts. The flat search can show only the flats for students („Für Studierende“) or for older people („Für Senior*innen“).
Not sure whether you'd get a WBS? Our WBS calculator works it out in a minute.
Sources: Gesobau's listings on gesobau.de, November 2026 · Gesobau, how letting works · Gesobau, flat search
No fees, no middlemen
Gesobau charges no commission. Anyone who claims to act for Gesobau and asks for a fee does so unlawfully: pay nothing. Gesobau takes no money or gifts, and whoever offers them can be excluded from its flats.
Gesobau lists its flats only on gesobau.de, inberlinwohnen.de, ImmobilienScout24 and immowelt, never on social networks or classified-ad sites. Its emails about your application come from an address at immomio.de and ask you not to reply; questions go to vermietung@gesobau.de.
Sources: Gesobau, how letting works · Gesobau's emails to an applicant through Immomio, 2026
Questions people ask about Gesobau
Does Gesobau ask for a SCHUFA report?
Not from you: Gesobau runs a SCHUFA credit check itself and pays for it, so don't buy a report (more on this). It doesn't accept guarantees.
Do you need a WBS for a Gesobau flat?
Only for a flat that asks for one: the flat's exposé says which WBS it needs, and Gesobau lets such a flat only to people with a WBS or an equivalent entitlement. Some flats, on the other hand, go only to households without a WBS entitlement; the description decides (more on this). Upload your WBS to your Immomio profile, ideally by the time you apply; it must still be valid when the lease starts.
Do you apply to Gesobau through Immomio?
Yes: a Gesobau flat needs an account at its partner platform Immomio, and „Jetzt bewerben“ on every listing at gesobau.de leads there (more on this). Signing up is free, and Gesobau asks for one account per person. There you also keep a search profile, for which Gesobau sends you offers that suit it, and you decide what Gesobau sees, and when.
When does Gesobau get back to you?
Gesobau names no time: if your profile suits the flat, it invites you to a viewing, and once it has checked your documents it sends a yes or a no (more on this). Even if your booking didn't work, Immomio tells you automatically what happens next.
What happens after you apply to Gesobau?
If your Immomio account is new, first confirm your email address, within 3 days (more on this). If your profile suits the flat, Gesobau then invites you to a viewing: book a slot at once, as there are only a few (more on this).
Which documents does Gesobau want?
Only those it asks for, and only after the viewing: upload them to your Immomio profile, complete, on time and no originals (more on this). If you're employed, that's a certificate from your current landlord that you owe no rent (Mietschuldenfreiheitsbescheinigung) and your last three payslips; Gesobau doesn't want bank statements.
Sources: Gesobau, how letting works · Gesobau, flat search · Gesobau, guide to registering at Immomio · Gesobau, renting with a WBS · Gesobau's listings on gesobau.de, November 2026 · Gesobau's emails to an applicant through Immomio, May and November 2026
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