600sf simple rec room $22–35K. 900sf with bath and bedroom $45–70K. Full walkout with kitchen $70–90K+.
Materials & appliances per mfr warranty.
What's included
- Waterproofing check and correction if needed
- Framing and insulation to WA energy code
- Electrical and plumbing rough-in via licensed subs
- Drywall, mud, tape, texture
- Flooring, trim, and paint
- Egress window install if required for bedroom
What we won't touch
If you need any of these, we'll refer you to a licensed specialist.
- Full foundation waterproofing (referred to waterproofing specialist)
- Structural underpinning
How the project runs
- 1Walkthrough & feasibility
Ceiling height check, moisture check, egress and sub-panel review.
- 2Design & permit
Layout drawings, permit submittal, HERS energy compliance.
- 3Rough-in
Framing, electrical, plumbing, insulation, inspections.
- 4Drywall & finish
Drywall, texture, floor, paint, trim, doors, hardware.
- 5Final inspection
Building final passed, walk-through, warranty starts.
Materials we spec
- • Mineral wool or rigid foam insulation
- • LVP or engineered wood flooring
- • 5/8" drywall on ceilings
Permits
Building, mechanical, and electrical permits are pulled and inspected.
Common questions
Yes for any sleeping room. We include egress install in the scope when a bedroom is planned.
Every basement gets a moisture check. If we see intrusion, we correct the source (grading, gutters, wall crack) before finishing.
Yes. If the drain is not stubbed in, we quote a macerating pump system as an alternative.
Ready to price your basement finish?
Free 45-minute walkthrough in Snohomish or King County. You leave with a fixed written scope.