ADU Construction

Accessory dwelling units — commonly called ADUs or granny flats — have become one of the most practical investments for Riverside homeowners looking to generate rental income, house family members, or increase property value. Ultimate Riverside Contractors manages ADU projects from initial site feasibility through final City of Riverside certificate of occupancy, including design coordination, permitting, and all construction trades.

California's ADU laws have made it significantly easier to build on most residential parcels, but the permitting and construction process still requires expertise to navigate correctly. Our team handles setback analysis, utility connection planning, foundation design coordination, framing, insulation, drywall, kitchen and bathroom rough-in, mechanical systems, and all exterior finishes — delivering a turnkey unit ready for occupancy or rental.

We build detached ADUs on vacant lot areas, attached ADUs that expand the footprint of the main home, and garage conversion ADUs that repurpose existing structures. Each project is guided by a transparent scope of work, a fixed-price contract, and a construction timeline so you know exactly what to expect from groundbreaking to move-in day.