Basement ADU Conversion

What This Service Involves

A dry, well-planned basement can become a private accessory dwelling unit with its own entrance and amenities. We address the moisture control, egress, ceiling height, and waterproofing that Puget Sound basements require to become safe, comfortable living space. Our conversions add insulation, plumbing, and finishes that meet code and keep the unit dry year-round. The finished apartment adds valuable rental or family space beneath your existing roof.

Benefits

Valuable living space from an unused basement; Thorough moisture control and waterproofing; Proper egress and code-compliant finishes; A private entrance and full amenities; Added rental or multigenerational potential

Our Process

1) We evaluate the basement's height, moisture, and access; 2) We design the unit and address waterproofing needs; 3) We add egress, insulation, plumbing, and finishes; 4) We complete inspections for a legal, dry unit

What Affects the Cost

Existing moisture and waterproofing needs; Ceiling height and egress requirements; Plumbing and electrical additions; Finish quality selected; Conversion permit and inspection fees

Best Time of Year

Basement conversions are best planned so waterproofing performance can be verified through Western Washington's wettest months.