Basement Finishing
Transform your basement into functional living space with our finishing services.
Price starts at $10,000
BrowseSeattle Basement Bathroom Installation Done Right
If you’ve kicked around the idea of adding a bathroom to a basement in Seattle, you’ve landed in the right place. We handle basement bathroom installations that actually work—for your floor, your plumbing, and your permit. We design to Seattle’s specs, knock out dampness, and leave you with a space that’s dry, legal, and livable. Whether you're building a powder room or a full bath under your home, we bring contractor-level clarity, sketches that inspectors approve, and follow-through that keeps you off the “redo” list.
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
Basement Flooring
Choose from a variety of flooring options to enhance your basement's comfort and style.
Price starts at $5,000
Basement Remodel
Revamp your basement for improved functionality and aesthetics with our remodeling services.
Price starts at $12,000
Basement Entertainment Center
Create the ultimate entertainment space in your basement with our customized solutions.
Price starts at $8,000
Basement Bathroom
Add convenience and value to your basement with a professionally installed bathroom.
Price starts at $6,000
Basement Waterproofing
Protect your basement from moisture and water damage with our waterproofing solutions.
Price starts at $5,500
Basement Insulation
Ensure year-round comfort and energy efficiency in your basement with proper insulation.
Price starts at $4,500
Basement Bar
Create a stylish and functional bar space in your basement for entertaining guests.
Price starts at $7,000
Basement Windows
Brighten up your basement and improve ventilation with new windows.
Price starts at $3,500
We’re turnkey specialists in basement bathroom installation near me services across Seattle — including wet bars, full baths, and ADU-ready suites.
Here’s what RENOVA Contractors delivers:
- Feasibility & code check – Confirm existing plumbing lines, ceiling clearance, and SDCI requirements (structural, venting, fixture spacing).
- Permitting coordination – We handle building, plumbing, and electrical permits via Seattle’s Services Portal to ensure legitimacy and avoid stop-work orders.
- Drainage & pump setup – We assess if a sewage ejector or backwater valve is necessary for gravity-fed systems. Seattle’s heavy rains make this a must.
- Plumbing rough-in – Precision-cutting through concrete, trenching, piping to existing drains, venting, vent fan installation, and sump tie-ins as needed.
- Finish installation – Waterproof flooring (tile or vinyl), moisture-rated drywall, energy-efficient fixtures, sealed transitions, and tight finishes.
- Inspection-ready handoff – Final roster walkthrough, inspection accompaniment, and permit closure.
We ensure everything — from vent fans to floor drains — is both code-compliant and purpose-built.
Licensed, Bonded, Insured
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Cost to Finish a Basement in Seattle
Basement Finishing
| Service | Cost Range | Average Cost | Labor Cost | Material 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!
Area:
basement
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!
Area:
basement
Timeline:
3 to 6 weeks
Remodel ROI Calculator 2025
basement
$30,000 - $200,000
$70,000
NaN%
kitchen
$25,000 - $150,000
$0
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How we work
Here’s our focused process, communicated clearly:
- Initial site review – We evaluate slab, ceiling height, sewage tie-in potential, and sump system layout.
- Planning session – Layout planning, fixture selection, and permit strategy. We position the bathroom near plumbing to reduce cost and complexity.
- Prep & prep permit – Submit plans, get greenlight, and secure field-inspection permits where applicable.
Build sequence:
- Core slab and trench
- Install pipework, ejector/pump if required
- Install vents, fan, and electrical
- Finish with flooring, fixtures, drywall, and trims
- Final walkthrough – We walk through together, answer your questions, and ensure it passes Seattle inspection.
We keep each step transparent and direct — what we quote is what you pay, and that includes the paperwork that keeps your home legal and livable.
Basement flooring materials
We install materials suited to Seattle’s damp, basement conditions:
- Fixtures – Kohler and Moen faucets — durable, stylish, and built for wet environments.
- Toilets – Low-flow, long-life models from TOTO and Kohler.
- Waterproof floors – Daltile porcelain tile or waterproof vinyl planks for longevity and easy maintenance.
- Drywall – Mold-resistant cement board or green board rated for below-grade use.
- Drainage/pump – Zoeller ejector pumps, Sioux Chief backwater valves for dependable performance.
Seattle-area supply partners:
- Seattle Repipe Co.
- Floor & Decor – Seattle
- Seattle Hardware Supply
Fast local sourcing keeps your project moving without long material delays.
FAQ
How much does it typically cost to add a bathroom to a basement in Seattle?
What permits are required for installing a bathroom in a basement in Seattle?
How long does it take to complete a basement bathroom install in Seattle?
When is the best time of year to install a basement bathroom in Seattle?
What are the benefits of adding a basement bathroom in terms of usability and home value?
Contact Us
- 206-255-2708sales@renova.contractors
- 221 1st ave w, #247, Seattle, WA 98119
- Monday – Sunday 9:00AM – 9:00PM
