The type of party wall you choose to use in a multi-unit building affects many people. Owners, architects, developers, builders, and occupants all play a role and are likely to have their own opinions about what type of wall is best. Owners may focus on costs, architects on code and structural considerations, while the developer may focus on costs and customer satisfaction. The builder may consider all these issues, as well as the availability of subtrades and the ease with which the wall will fit into the overall structure. And the future occupant will want the privacy and fire protection a good party wall provides. The best decision, of course, will balance these interests to come up with a