All § 172 of the German Building Code (BauGB) § 250 of the German Building Code (BauGB) Prohibition on division Roof extension Attic conversion In-place densification Construction Trades Safety Right to refuse performance Defects Work wages Action for top-up HOAI Minimum rates public client BGH Unit price contract Contractual penalty Floor plan change Milieu protection GbR Company register Notary Broker Reservation fee Repayment Supplements VOB/B Additional remuneration Inheritance Annual Tax Act Donation ECJ Price law Federal Constitutional Court Rent cap Unconstitutional Berlin Suspended toilet social preservation area Architectural law HOAI 2021 Building fabric to be processed Shareholder Mittenzwey Administrator WEG reform Condominium Act social preservation areas social preservation order Conversion ban Court Notary clerk Job advertisement Floor plan changes