Abstract: A method for assembling multi-unit, party wall residential buildings employs fire-resistant structural panels which are manufactured off-site and installed in the structure as completed party walls. The individual units are assembled side-by-side and thereafter the factory-assembled, fire-resistant party wall panels are introduced into the building covering the contiguous walls of the individual units. Satisfactory fire ratings for the resulting buildings can be achieved. The fire-resistant wall sections are fabricated from a frame which is covered with fire-resistant panels on both surfaces and filled with acoustical insulation.