Maximize your home's usable square footage. Based in Mountlake Terrace, WA, we convert unfinished basements into warm, inviting living spaces, suites, and offices across Lynnwood, Shoreline, and Edmonds.
Finishing your basement is the most cost-effective way to expand your home's usable living space. At G.B.L Construction LLC, we handle everything — structural framing, proper insulation, subfloor moisture mitigation, electrical layouts, plumbing for new bathrooms, and soundproof drywall.
We design and build customized layouts that match your family's lifestyle, hobbies, and entertainment needs.
Acoustic insulation, concealed audio/video wiring, custom TV wall niches, dimmable LED pot lights, and stadium seating platforms.
Custom cabinetry, quartz countertops, bar sinks, beverage refrigerators, ice makers, under-cabinet lighting, and glass display shelving.
Private bedrooms with code-compliant egress windows, full closets, private bathrooms, and dedicated climate control zoning.
Reinforced subflooring for heavy workout equipment, mirror walls, sound dampening insulation, and abundant dedicated power outlets.
We address moisture protection, structural framing, and municipal code requirements at every stage.
We evaluate your foundation walls and slab for moisture levels, inspect drainage, and plan your custom layout.
You receive an itemized quote covering framing, vapor barriers, HVAC ducting, plumbing rough-ins, and finishes.
We install treated baseplates, stud framing, rigid foam insulation, wiring, plumbing, and moisture-resistant drywall.
LVP flooring, custom doors, trim, paint, fixture installation, and thorough final inspection with you.
Everything you need to know before finishing your basement.
Call Our TeamWe use pressure-treated bottom plates, closed-cell rigid foam board insulation against concrete walls, seamless vapor barriers, and moisture-resistant drywall. We also recommend 100% waterproof luxury vinyl plank (LVP) flooring.
Yes. We can trench into the existing concrete slab to connect with your home's main sewer line, or install a sealed sewage ejector pump system engineered specifically for lower-level bathrooms.
Yes. Building codes require any designated legal bedroom in a basement to have an egress window with proper dimensions and an exterior escape well for fire safety. We can cut foundation concrete and install complete egress systems.
A typical basement remodel takes approximately 4 to 8 weeks depending on the overall size, bathroom additions, custom wet bar builds, and permitting timelines.
Call G.B.L Construction LLC for a free on-site walkthrough and a comprehensive written estimate.