Substantial alteration of a 15-unit-or-larger project triggers the full new construction scoping

xp.section504.substantial_alteration_triggers_new_construction_scoping · v1.0.0

Where alterations are undertaken to a project of 15 or more units and the cost of the alterations is 75 percent or more of the replacement cost of the completed facility, the alteration is a substantial alteration and the new construction requirements of 24 CFR 8.22 apply in full -- five percent mobility accessible units and an additional two percent for hearing or vision. Below that threshold, alterations to dwelling units must to the maximum extent feasible be made accessible, and once five percent of the units in the project are accessible to persons with mobility impairments no further units or elements need be made accessible under that provision.

Confidence

high

Effective from

1988-07-11

Last reviewed

2026-08-31