The 10 basement finishing contractors from Google's results for Seattle, Washington, ordered by Google rating weighted by review count. No firm pays to be listed or ranked.
Last updated
Licensing in Washington. Washington contractors must register with Labor & Industries (L&I), which also shows their bond and insurance.
on GoogleSeattle, WA
Model Remodel renovates and finishes basements in Seattle, including conversions into mother-in-law suites and primary suites. Its portfolio also spans additions, ADUs, attics, kitchens, bathrooms and decks, with projects in Queen Anne, Magnolia and Mercer Island.
(206) 282-2150 16 W Harrison St, Seattle, WA 98119
on GoogleSeattle, WA
Potter Construction remodels basements in Seattle, converting unused lower levels into rooms people can live in. The work adds usable living area inside the existing footprint of the house rather than building outward.
(206) 935-9696 5639 California Ave SW, Seattle, WA 98136
on GoogleBellevue, WA
Based in Bellevue, TopVolk Construction finishes basements around the Seattle area, including Seattle itself, Bellevue and Tacoma. Each basement job can cover framing, insulation, hanging drywall and laying new flooring for the finished room.
(206) 591-1096 204 111th Ave NE, Bellevue, WA 98004
on GoogleRedmond, WA
Emerald City Construction builds detached backyard cottages and attached or interior accessory dwelling units in Seattle and on the Eastside. Based in Redmond, the company also finishes basements as part of its renovation work.
(425) 502-8174 2571 152nd Ave NE, Redmond, WA 98052
on GoogleSeattle, WA
Jackson Design Build is a Seattle design-build remodeler whose basement projects create bedrooms, home offices and recreation rooms. The firm also handles whole-home remodels, kitchen remodels and home additions around the city.
(206) 352-3749 14824 Westminster Way N, Seattle, WA 98133
on GoogleSeattle, WA
This Seattle firm remodels and finishes basements, addressing issues such as low ceiling height and flooring choices. Projects aim to add play areas, entertainment space or home offices for families who would rather stay put than move.
(206) 937-4809 624 S Lander St Unit 57, Seattle, WA 98134
on GoogleSeattle, WA
Vertical Construction Group is a Seattle design-build team that converts basements into guest suites, home offices and other living space. Its basement work deals with low ceilings, moisture and leaks, egress, and permitting, with waterproofing part of the scope.
(206) 228-0135 5448 Kirkwood Pl N, Seattle, WA 98103
on GoogleSeattle, WA
Gaspar's remodels basements in Seattle homes, converting unfinished storage basements and partially finished lower levels into full living space. Typical end uses include recreation rooms and home offices for the household.
(206) 324-8199 300 S Lucile St, Seattle, WA 98108
on GoogleFederal Way, WA
Working from Federal Way, ID Builder converts Seattle-area basements into media rooms, bedrooms, guest suites or legal accessory dwelling units. Egress windows, moisture control, insulation and ceiling height are dealt with first, before the finished living space is built out.
(206) 795-3616 36058 21st Ln S, Federal Way, WA 98003
Seattle
In Seattle, a basic finish typically costs $28,000 – $56,500. Remodeling labor in Seattle runs about 13% above the US median, which accounts for most of the difference from the same project elsewhere.
These are the firms from Google's results for "basement finishing seattle", with directories, chains and suppliers removed. They are ordered by Google rating weighted by review count, and the ratings shown are Google's. No firm pays to be listed or ranked. The list was last updated in October 2026.
Only with an emergency escape opening, usually an egress window of a minimum size with a window well, plus the ceiling height your local code requires. Without them it cannot legally be sold as a bedroom.