Paste a listing from ImmoScout, Immowelt or Kleinanzeigen, or upload the PDF Exposé: real monthly cost, legal checks, scam patterns and building risks — calculated in your browser, nothing is stored.
Address & neighborhood check
Type an address with the house number, or share your location — no listing needed.
1Paste a listing, upload a PDF, or use the extension
2Confirm address & values
3See the analysis & report
Step 1 — add the listing
Paste listing text or upload a PDF to prefill the fields — then review & confirm.
Helper calculators & knowledgeOptional — open when needed
True living area (WoFlV)
BGH: actual area >10% below contract → cut the rent and reclaim past overpayments.
Frozen-rent calculator (Kappungsgrenze)
Reserve stress-test (Peterssche Formel)
Peterssche Formel: a building needs ≈1.5× its construction cost in upkeep over 80 years. Rough rule, not a guarantee.
The knowledge the broker hopes you don't have
Educational self-help, not legal/financial advice. The analysis runs locally in your browser; nothing you paste is stored.
Official German sources·Last updated: Reviewed regularly·Methodology
