Best Basement Finishing Services in Seattle

A spacious room featuring white built-in cabinets with gold handles, light wood flooring, and soft gray walls. A black ceiling fan and two modern wall lights illuminate the space, which also has a countertop area beneath the window with shutters—perfect for your basement remodeling project.
A modern basement living area by a reputable basement remodeling company, featuring light gray hardwood flooring, gray walls, and recessed lighting. The room has a cozy seating area with a gray sofa, coffee table, and minimalist decor. There's a small wet bar with a countertop, wine refrigerator, and round mirror.
A spacious, empty room with light blue walls, white trim, and recessed ceiling lights. The room features a hardwood floor, a white brick fireplace, several doorways, and a small window near the ceiling. Perfect for basement finishing by an expert basement contractor; it even has a gray door with a window on the right.
A spacious, modern basement with light gray walls and wood flooring. The ceiling features recessed lighting, and there is a small basement window near one wall. A sleek, built-in linear fireplace is installed on one wall, and a white door is visible on another—a perfect example of expert basement remodeling.
A small, empty room with white walls and a wooden floor. The ceiling is fitted with two recessed lights, and there are two square windows with shutters near the top of one wall. Ideal for basement finishing, the room is clean and brightly lit, boasting minimal decor.
A minimalist room featuring light wood flooring and white walls. There are two closed double doors with black handles on the left and a single open door leading to a living area with a couch and shelving unit in the background. Ceiling lights illuminate the spaces, showcasing expert work by a basement contractor.
A modern living room features a dark gray sectional sofa atop a patterned area rug. The room has light wood flooring, a ceiling fan, recessed lighting, and a white door with a half-circle window to the right. A person partially visible carries red flowers on the left, hinting at recent basement remodeling efforts.
A spacious, modern kitchen with light wood flooring, white cabinetry, and wooden countertops. A flat-screen TV is mounted on the wall to the left. The ceiling features recessed lighting and a large black ceiling fan installed by a reputable basement contractor. Large windows provide ample natural light.

If your basement’s been unused or just full of junk, we can help bring it back into something usable. RENOVA handles flooring, drywall, lighting, and interior paint—whether you're just freshening up or doing a full basement finish. We can add a basement bathroom too—licensed plumber on the crew takes care of all the rough-in and fixtures. Need a basic layout with a room or two? We can help sort that out, doesn’t need to be fancy. If you’re doing one room or the whole thing, we’ll build it clean, to code, and ready to use.

Seattle basement Remodeling Videos

Watch our recent seattle remodel projects on YouTube Shorts – real jobs, quick overviews, and design ideas from RENOVA Contractors.

Basement Finishing Services in Seattle by RENOVA

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Kitchen
Bathroom
Cabinets
Countertops
Roofing
Siding
Tile
Flooring
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Basement
Attic
Decking
Basement Finishing remodel project by RENOVA Contractors

Basement Finishing

Transform your basement into functional living space with our finishing services.

Price starts at $10,000

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Basement Flooring remodel project by RENOVA Contractors

Basement Flooring

Choose from a variety of flooring options to enhance your basement's comfort and style.

Price starts at $5,000

Basement Remodel remodel project by RENOVA Contractors

Basement Remodel

Revamp your basement for improved functionality and aesthetics with our remodeling services.

Price starts at $12,000

Basement Entertainment Center remodel project by RENOVA Contractors

Basement Entertainment Center

Create the ultimate entertainment space in your basement with our customized solutions.

Price starts at $8,000

Basement Bathroom remodel project by RENOVA Contractors

Basement Bathroom

Add convenience and value to your basement with a professionally installed bathroom.

Price starts at $6,000

Basement Waterproofing remodel project by RENOVA Contractors

Basement Waterproofing

Protect your basement from moisture and water damage with our waterproofing solutions.

Price starts at $5,500

Basement Insulation remodel project by RENOVA Contractors

Basement Insulation

Ensure year-round comfort and energy efficiency in your basement with proper insulation.

Price starts at $4,500

Basement Bar remodel project by RENOVA Contractors

Basement Bar

Create a stylish and functional bar space in your basement for entertaining guests.

Price starts at $7,000

Basement Windows remodel project by RENOVA Contractors

Basement Windows

Brighten up your basement and improve ventilation with new windows.

Price starts at $3,500

RENOVA Contractors LLC is a full-scope basement remodel company in Seattle. We specialize in basement finishing, ADU conversions, and full interior buildouts — from concrete to trim. Whether you’re upgrading an old basement, finishing new construction, or converting space into a legal unit, we manage every phase of the job.

We’re a licensed basement remodel contractor in Seattle — everything we do meets current Seattle building code, from insulation and egress to HVAC and plumbing. If the job calls for structural changes, layout rework, or new windows, we bring in a licensed engineer or architect. And for material selection, layout, tile, and finishes — we include free interior design support with every project.

What’s Included:

  • 🪚 Framing and layout – Bedrooms, rec rooms, laundry rooms, ADUs, or multi-room setups
  • 🌧️ Insulation and moisture barrier – R-21 walls, vapor protection, floor prep
  • 🪟 Egress windows – Fully compliant with IRC R310 — includes cutting, drainage, and trim
  • 🔧 Plumbing rough-in – Full drain, supply, and vent for bathrooms or basement kitchens
  • Electrical – Lights, outlets, smoke/CO detectors, new circuits, subpanel work
  • 🌬️ HVAC – Duct tie-ins or ductless systems for added zones
  • 🧱 Drywall, paint, trim – Moisture-rated board, corner bead, baseboard, and doors
  • 🛁 Bathrooms – Waterproof showers, tiled floors, fans, and fixtures
  • 🪵 Flooring – LVP, tile, or carpet depending on the room type and slab condition

We’re a Seattle basement remodeling company that handles permits, manages trades, and keeps jobs moving — no handoffs, no missed steps. If you need a reliable basement renovation expert in Seattle, RENOVA Contractors LLC builds it clean, builds it once, and builds it right. ✅🧰📏

Licensed, Bonded, Insured

Construction License
Business License
Insurance Certificate
Bond Certificate

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Cost to Finish a Basement in Seattle

Basement Finishing

Detailed remodeling cost breakdown for Basement Finishing in Seattle
ServiceCost RangeAverage CostLabor CostMaterial Cost
Framing and Insulation$5,000 - $15,000$10,000$7,500$2,500
Drywall Installation$3,000 - $7,000$5,000$3,500$1,500
Flooring Installation$5,000 - $15,000$10,000$7,000$3,000
Painting$1,500 - $5,000$3,250$2,500$750
Electrical Work$2,000 - $10,000$6,000$4,500$1,500
Plumbing Work$3,000 - $12,000$7,500$5,500$2,000
HVAC Installation$4,000 - $10,000$7,000$5,000$2,000
Finishing (doors, trim, etc.)$2,000 - $6,000$4,000$3,000$1,000
Miscellaneous (permits, inspections, etc.)$1,500 - $5,000$3,250$2,500$750

Home Remodeling Services Photos

RECENT BASEMENT REMODELS

We’ve turned 3 basements into cozy and useful spots this year. Whether it's a game room, office, or extra bedroom, see how basements can be transformed!

Recent Basement Remodelsicon

Area:

basement

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Timeline:

3 to 6 weeks

RECENT BASEMENT REMODELS

We’ve turned 3 basements into cozy and useful spots this year. Whether it's a game room, office, or extra bedroom, see how basements can be transformed!

Recent Basement Remodelsicon

Area:

basement

/_next/static/media/calendar.76a05278.svgicon

Timeline:

3 to 6 weeks

Remodel ROI Calculator 2025

basement

$30,000 - $200,000

$70,000

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kitchen

$25,000 - $150,000

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How we work

Initial Consultation

  • Understanding your vision.
  • Discussing your requirements.
  • Providing a project overview.

Design and Planning

  • Creating a detailed plan.
  • Designing the layout.
  • Ensuring feasibility and compliance.

Cost Estimation and Budgeting

  • Providing detailed cost estimates.
  • Budgeting for the project.
  • Ensuring transparency in pricing.

Permits and Approvals

  • Securing necessary permits.
  • Obtaining required approvals.
  • Ensuring legal compliance.

Site Preparation

  • Clearing and cleaning the site.
  • Marking the layout.
  • Preparing for construction.

Framing and Insulation

  • Installing framing.
  • Adding insulation.
  • Ensuring structural integrity and comfort.

Electrical and Plumbing Work

  • Installing electrical systems.
  • Setting up plumbing.
  • Ensuring functionality and safety.

Drywall and Finishing

  • Installing drywall.
  • Applying finishes.
  • Creating a polished look.

Flooring Installation

  • Laying down the flooring.
  • Choosing the best materials.
  • Ensuring durability and style.

Final Touches and Cleanup

  • Adding final details.
  • Cleaning up the site.
  • Preparing for handover.

Final Inspection and Handover

  • Conducting a thorough inspection.
  • Ensuring quality standards are met.
  • Handing over the finished project.

RENOVA Contractors LLC takes a hands-on, full-scope approach to basement remodeling in Seattle. We start with a walkthrough to measure the space, check structural elements, and discuss layout options. If the project involves egress, structural work, or ADU planning, we coordinate with licensed engineers or architects early.

From there, we build a clear line-by-line estimate and submit all required permits to the City of Seattle. Materials are ordered up front, and we manage every trade — framing, electrical, plumbing, HVAC, insulation, drywall, flooring, and finish work — in sequence. You’ll work with the same crew start to finish, with no rotating subs or missed steps.

Our team walks every inspection, keeps the jobsite clean, and finishes with a full walkthrough and labor warranty. We don’t cut corners — we build it once, build it clean, and build it to code. ✅

Materials to Use For your Basement

  • Countertops
  • Windows
  • Tile
  • Flooring
  • Kitchen Cabinets
  • Doors
  • Decking

We don’t use cheap stock or bottom-shelf materials. Every basement we remodel in Seattle is built with code-compliant products that are rated for moisture, structure, and long-term durability.

Structure & Framing 🪚

  • Framing lumber – Kiln-dried SPF or Douglas Fir from Dunn Lumber or Parr
  • Pressure-treated wood – Used for all below-grade framing where required (IRC R317.1)
  • Subfloor systems – DRIcore, Barricade, or custom ¾" plywood over vapor sheet
  • Wall anchors & fasteners – Rated per IBC/IRC Table R602.3(1) and Seattle seismic (Zone D2)

Insulation & Vapor Control 🌧️

  • Wall insulation – R-21 fiberglass batts (WA Energy Code Section R402.1.2)
  • Floor insulation – R-10 rigid foam over slab where required for ADUs or storage
  • Vapor barrier – 6-mil poly or StegoWrap, taped and sealed under flooring
  • Air sealing – Great Stuff Pro foam or Tremco Acoustical Sealant for all penetrations

Plumbing, Electrical, HVAC ⚙️

  • Plumbing – PEX (Uponor), ABS/PVC drains, sloped and vented to UPC code
  • Electrical – 2020 NEC-compliant wiring, GFCI protection, tamper-resistant outlets
  • HVAC – Ducts sealed with UL 181 tape or ductless mini-splits (Mitsubishi, Daikin) sized per load

Drywall, Trim, Finishes 🧱

  • Drywall – ½" mold-resistant board on walls, ⅝" Type X where required
  • Tile – Statements, United Tile, or Daltile — installed over Schluter KERDI or Wedi board
  • Flooring – COREtec or Shaw LVP, CFM carpet, or tile rated for slab installation

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