What milieu protection is

Officially the areas are called social preservation areas. They are based on Section 172 of the Federal Building Code and set by the districts by ordinance, and the districts also enforce them. According to the Senate Department for Urban Development there are currently 82 such areas. They are meant to stop tenants being pushed out of their neighbourhood by expensive renovations or by buildings being split into condominiums.

What needs a permit

• Luxury renovation: the districts can refuse work that goes beyond a contemporary standard.
• Merging, demolition, change of use: merging flats, demolishing them or using them for something else needs a permit.
• Conversion to condominiums: in the preservation areas, splitting a building into condominiums needs a permit under Berlin’s conversion ordinance of 13 March 2025, which runs until 12 March 2030. Since January 2026, buildings with more than five flats also need a permit citywide under Section 250 of the Federal Building Code.
• Temporary lets: under new Senate administrative rules, fixed-term letting in these areas also became subject to a permit in 2026.

The right of first refusal

When a building in a preservation area is sold, the district may have a right of first refusal. In November 2021 the Federal Administrative Court significantly restricted its use. According to the Senate, the districts today first seek an agreement in which the buyer commits to certain rules. If the buyer refuses, the right is usually exercised in favour of a third party, such as a state-owned housing company or a cooperative.

What it means for buyers

• Check first: whether an address is in a preservation area is shown on the Berlin Geoportal layer for preservation ordinance areas, and the Senate also publishes a street list.
• Clarify renovation plans early: if you want to renovate after buying, talk to the district planning office first and do not count on a permit you may not get.
• Tenancy included: if you buy a let flat, you take over the existing tenancy.
• Purchase costs: real estate transfer tax in Berlin is 6 percent of the price, plus notary and land registry fees.

What it means for tenants

For tenants, milieu protection is a safeguard: expensive renovations and conversions become harder. The districts’ tenant advice services answer questions.

Where milieu protection applies

The areas are mainly in the inner city, for example in parts of Kreuzberg, Neukölln, Prenzlauer Berg, Friedrichshain, Wedding and Schöneberg, but there are also some in other districts. Exactly which streets are included is shown by the Geoportal and the street list. Our Kiez guide gives an idea of how different the neighbourhoods are.