QUESTION 50 One of the primary differences between the condominium form and the single family contract is found in paragraph number 2. This key difference is, the legal description requires a unit number, a building number, and a condominium project name. the legal description requires a lot number, a block number, and a subdivision name. the legal description requires a lot number, a unit number, and a building number. the legal description requires a block number, a building number, and a condominium project name