Berlin Flat Swap Rent Board: What the Next Flat Costs by Route
What a flat swap in Berlin does to your rent. Enter your flat and the one you want: the board prices the same flat as a state-owned portal swap, a downsizing offer, a private swap and a fresh market search. Checked on 16 October 2026.
The state-owned swap portal keeps both net cold rents, the 2025 downsizing offer lets at the Mietspiegel, and a private swap is a new lease capped at 10 percent above it.
Whether a flat swap in Berlin keeps your rent depends on who owns the two flats. This board puts the four routes side by side for your sizes and rents.
What the board shows
A flat swap in Berlin can keep your rent or reset it, and the difference is who owns the two flats. The board takes your flat and the one you want and prices the same flat four ways: a swap on the state-owned portal, where both net cold rents stay unchanged; the downsizing offer from your own state-owned company, at the Mietspiegel rent; a private swap or new lease under the rent cap; and a fresh search at the median asking rent in Berlin listings.
How to use it
Say who owns each flat: one of the seven state-owned companies (degewo, GESOBAU, Gewobag, HOWOGE, STADT UND LAND, WBM, berlinovo), or a private landlord.
Enter the size in m² and the net cold rent a month for your flat and for the flat you want. Net cold (Nettokaltmiete) is the first rent line in a lease, before heating and service charges.
Pick inner city, all Berlin or outer districts to set the market comparison. The red line marks what you pay now.
Where the figures come from
The swap portal rules come from inberlinwohnen.de, the downsizing offer from the state-owned companies' announcement of 1 September 2025, the Mietspiegel 2026 median of EUR 7.71 per m² from mietspiegel.berlin.de, and the 2025 asking rents from the IBB Housing Market Report. The rent cap line uses the city median; your own flat's comparative rent can sit above or below it. Checked on 16 October 2026.