360-932-0505
Basement Remodeling2026-09-11T11:38:58-07:00

Basements finished for the way Whatcom County actually lives

Finished basements, basement bathrooms, egress windows, and waterproofing across Bellingham and Whatcom County.

A finished basement doubles your usable living space

Unfinished basements are the biggest missed opportunity in most Whatcom County homes. A finished basement adds a family room, a guest suite, a home office, or even a legal rental — for a fraction of the cost per square foot of an addition.

The catch: basements in the Pacific Northwest have to be built with moisture in mind from day one. Vapor barriers, proper insulation, egress windows for any bedroom, and waterproofing where the walls meet the floor. Skipping those steps is how basements end up smelling musty two years after the paint dries.

What's included

Full Basement Finish

Framing, insulation, drywall, flooring, and finish work.

Basement Bathrooms

Sub-slab plumbing, ejector pumps, and full tile bathrooms.

Moisture Management

Vapor barriers, insulation strategy, and drainage integration.

What we offer

Finished Basements

A full basement finish transforms 800 to 1,500 sq ft of storage into livable space. We frame interior walls, insulate to current Whatcom County code, drywall, install flooring, and add trim and lighting — with the moisture reality of a PNW basement designed in from the start.

Basement Bathrooms

Adding a bathroom below grade means either running plumbing above the slab or breaking concrete to run drain lines below. We do both, install ejector pumps where the sewer main is above the basement floor, and build the bathroom to the same waterproofing standard as any Bellingham upstairs bath.

Egress Windows

Any basement bedroom needs a code-compliant egress window and well. We cut the concrete opening, install the window and well, tie into drainage, and finish the interior trim. It’s one of the more specialized parts of a basement finish and we handle it in-house.

Waterproofing and Vapor Barriers

Every finished basement wall gets vapor management appropriate to the assembly — closed-cell foam directly against concrete, then framing off the foam, then insulated wall cavity. This is the detail that keeps Whatcom County basements dry and mold-free.

Basement Layout Design

Basement layouts are constrained by structural columns, mechanical equipment, ductwork, and where the plumbing can go. We design layouts that work with the constraints — not against them — and produce a plan you can actually visualize before construction starts.

How the project runs

01

Design

Layout, moisture assessment, and code review.

02

Rough-In

Framing, plumbing, electrical, HVAC extensions.

03

Finish

Insulation, drywall, flooring, trim, and paint.

04

Punch List

Inspections, walkthrough, and warranty.

Frequently Asked Questions

Do I need egress windows?2026-09-09T13:29:57-07:00

Any basement bedroom requires a code-compliant egress window. Living rooms and family rooms usually don’t. We flag what’s required during design.

How long does a basement finish take?2026-09-09T13:29:41-07:00

Six to twelve weeks of active construction for a typical 1,000 sq ft basement, depending on scope and whether we’re doing a bathroom.

How much does a basement finish cost?2026-09-09T13:29:33-07:00

A typical Whatcom County basement finish runs $35k to $90k depending on square footage, whether a bathroom is included, and finish level. Egress windows add cost.

Ready to start your project?

Free estimates for Whatcom County residential projects. No obligation, no pressure.

© 2026 LGC Construction, LLC · Licensed & Insured in Washington State · Whatcom County