A list of terms you’re likely to encounter, and their english equivalent:

German TermMeaning
AufteilungsplanPartition Plan; a drawing showing the division of a building into separate units (apartments, cellars, etc.).
GrundbuchamtLand Registry Office; the local authority that manages the land register.
NotarNotary; the legal official required to certify property sales in Germany.
MaklerReal Estate Agent / Broker.
VerkäuferSeller.
GrundbuchauszugLand Registry Extract; an official document detailing ownership, debts, and rights associated with a property.
GrundrissFloor Plan; a technical drawing showing the layout and dimensions of a room or apartment.
BauträgerProperty Developer; a company that buys land and builds/renovates properties to sell.
BauakteBuilding File; the historical folder containing all permits and technical drawings held by the building authority.
BauamtBuilding Authority; the government office responsible for construction permits.
KaufvertragsentwurfDraft Purchase Agreement; the preliminary version of the contract provided by the notary.
TeilungserklärungDeclaration of Division; the legal document that splits a property into individual units with specific co-ownership shares.
NachträgeAddenda / Supplements; additions or changes to an existing legal document or contract.
HausverwaltungProperty Management; the company responsible for managing the common property of an apartment complex.
WohnflächenberechnungLiving Space Calculation; a formal calculation of the square meterage, usually required by banks for financing.