One appfor landlords and tenants.

Finally, one app that brings both sides onto the same page: landlords and tenants, always fair for both. See which rent has arrived automatically, create the Nebenkostenabrechnung in minutes, keep every deadline in view. Free to start – for landlords and tenants.

I'm a landlord I'm a tenant

Data hosted in Germany GDPR-compliant No credit card needed

Both sides

One app. Two sides. Always fair.

Renting out and renting belong together. HausMaus gives both sides the same clear overview — transparent and fair.

For landlords

Rent out without the admin

The work of a property manager — in your hands, in one app. You keep the overview, HausMaus handles the routine.

See which rent has arrived automatically
Create utility statements (Nebenkosten) and export them free
Anlage V tax data, export in minutes
Reviewed templates, approved by you

See landlord tools →

For tenants

Rent with a clear overview

Everything about your home in one place — no landlord invite required. You stay on top of deadlines, documents, and messages, and check whether your Nebenkosten statement is too high.

Check your Nebenkosten statement — are you overpaying?
Your lease and documents in one place
Deadlines and dates tracked automatically

See tenant tools →

Guides

Your tenancy question — answered clearly.

Free, no account. Every guide cites the law — and links the right tool to check instantly.

Check operating costs

9 in 10 statements contain errors. Find them and get your money back.

Check statement →

Reclaim your deposit

When you get your full deposit back — and what to do if you don't.

Check deposit →

Check the rent cap

Paying too much rent? Get an answer in 2 minutes (§556d BGB).

Check rent →

Check a rent increase

Is the increase allowed? Calculate the cap & deadline instantly.

Check increase →

Split a shared flat fairly

Rent & costs equally, by m² or per room — fair for everyone.

Split costs →

Defects & rent reduction

Mould, heating, noise: document it and reduce your rent.

Report a defect →

Built on German property law

Every step is aligned with German tenancy law.

From the Nebenkostenabrechnung to deadlines and templates – HausMaus keeps the rules of German property law (BGB, BetrKV & more) in mind at every step. So everything stays transparent and fair for both sides.

Frequently asked

Good to know

HausMaus is an app that brings renting and renting out together in one place: see which rent has arrived automatically, prepare utility statements, keep deadlines in view, exchange messages, and use reviewed templates — for private landlords and their tenants in Germany.

For private landlords with one or more apartments, and for their tenants. One app, two sides — both get the same clear overview.

Yes. Tenants can use HausMaus independently — upload your lease, track deadlines, use templates — with no invitation from the landlord. For tenants it's free.

Your data is stored in Germany and processed in line with the GDPR.

No. HausMaus offers general information and templates, but not legal advice. When in doubt, contact a tenants' association (Mieterverein) or a lawyer.

Getting started is free for both landlords and tenants. Tenants use HausMaus free forever; landlords with larger portfolios later pay a fair, transparent fee — with no share of your rent.

With HausMaus you upload the utility statement and go through each item clearly. The app shows what was allocated and how — under §556 BGB and the German operating-costs regulation. Free for tenants.

Yes. HausMaus keeps the rules of German property law in mind at every step – from the Nebenkostenabrechnung (§556 BGB, operating-costs regulation) to deadlines and templates. So everything stays transparent and fair for both sides. Note: HausMaus offers general information and templates, not legal advice.

Guides