Under full MRG protection, landlords cannot exceed the statutory reference rent (Richtwert) plus legally permitted location surcharges (Lagezuschlag). Rental deposits (Kaution) are standardly 3 gross monthly rents, held in an interest-bearing escrow.
Fixed-term rental contracts (befristeter Mietvertrag) must be set for a minimum duration of 3 years, with tenants holding the statutory right to terminate after 1 year with 3 months notice.