Basement Finishing
Transform your basement into functional living space with our finishing services.
Price starts at $10,000
BrowseBasement Remodel Bellevue WA – Convert, Finish with RENOVA Contractors LLC
Basements should feel dry, quiet, and part of the house. We turn underused space into family rooms, bedrooms, offices, or in-law suites. First we check head height, stairs, structure, moisture, and where egress belongs. You get a line-item price and a schedule that makes sense. We handle permits and meet inspections. Scope can include framing, fire blocking, air sealing, insulation with the right vapor control, sound control under the main floor, and new lighting and outlets with AFCI/GFCI where required. If a bath or laundry is added, we plan drains, vents, and ejector or backwater valves. Floors are leveled, slabs patched if needed, and we pick finishes that hold up below grade. HVAC is sized for the load: mini-split, low-profile ducting, or electric heat as appropriate. Drywall, trim, built-ins, and closets finish it out. Clean jobsite, protected paths, daily tidy. Predictable work. Solid results.
Bellevue basement Remodeling Videos
Watch our recent bellevue remodel projects on YouTube Shorts – real jobs, quick overviews, and design ideas from RENOVA Contractors.
Basement Finishing Services in Bellevue 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
RENOVA provides basement remodeling services in Bellevue and the Eastside—turning underused rooms into functional living space. We design based on code, lifestyle use, and long-term durability.
Our Basement Services Include:
- Full basement finishing – Framing, drywall, flooring, lighting, and electrical in compliance with IRC and King County codes
- Basement bathroom installations – Includes rough-in plumbing, vent fan, waterproof membrane, tile work, and fixtures
- Living space conversions – Install egress windows, HVAC tie-ins, electrical and insulation to transform basements into bedrooms or offices
- Daylight basement & walk-out access upgrades – Window wells, regrading options, clean stair landing transitions
- Home office, playroom, gym or bar remodeling – Built-ins, task lighting, media-ready walls, kitchenette installs
- Basement waterproofing & mold remediation – Foundation crack sealing, drain tile systems, vapor barriers, and sump pump installs
- Insulation & ventilation upgrades – Closed-cell spray foam or R‑21 batts, HRV/exhaust fans to control moisture and temperature
- Partial renovations – Vanity swaps, flooring refresh, adding built-in storage or bar tops
We price everything with transparency—whether you're looking for basement remodel cost Bellevue or basement finishing cost Seattle. Our quotes detail each category (plumbing, framing, waterproofing, finishes) so you understand where the cost goes. Renovations are planned to pass BelRed/King County permitting, and we follow fire separation and energy standards throughout—no surprises at final inspection.
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Cost to Finish a Basement in Bellevue
Basement Finishing
| Service | Cost Range | Average Cost | Labor Cost | Material Cost |
|---|---|---|---|---|
| Framing and Insulation | $5,500 - $16,500 | $11,000 | $8,250 | $2,750 |
| Drywall Installation | $3,300 - $7,700 | $5,500 | $3,850 | $1,650 |
| Flooring Installation | $5,500 - $16,500 | $11,000 | $7,700 | $3,300 |
| Painting | $1,650 - $5,500 | $3,575 | $2,750 | $825 |
| Electrical Work | $2,200 - $11,000 | $6,600 | $4,950 | $1,650 |
| Plumbing Work | $3,300 - $13,200 | $8,250 | $6,050 | $2,200 |
| HVAC Installation | $4,400 - $11,000 | $7,700 | $5,500 | $2,200 |
| Finishing (doors, trim, etc.) | $2,200 - $6,600 | $4,400 | $3,300 | $1,100 |
| Miscellaneous (permits, inspections, etc.) | $1,650 - $5,500 | $3,575 | $2,750 | $825 |
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Home Remodeling Services Photos
BELLEVUE BASEMENT REMODEL 2025
Bellevue basement turned into a clean, multi-use hangout. The lounge has a sectional, wall-mounted TV, built-ins, recessed lights, and a navy accent wall. Nearby is a small kitchenette with marble-look counters, wood island cabinets, open shelves, and a bar sink. A second wet-bar area uses blue base cabinets and a tile backsplash. There’s a built-in desk nook plus an entertainment corner with a basketball arcade and bar stools. Light wood flooring ties it all together; simple trim keeps it calm and durable.
Area:
basement
Timeline:
9 weeks on site after permits and material delivery
BELLEVUE BASEMENT REMODEL 2025 – RUSTIC BAR & BATH
Basement finished into a relaxed hangout with a rustic-modern bar and a new bathroom. The kitchenette has dark cabinets, a wine fridge, open shelves, a brick backsplash, and a wood plank ceiling over warm wood floors. The bathroom adds a walk-in shower with glass doors, wood accents, a vessel sink, and a clean vanity/mirror setup. The main area stays open with recessed lighting, light gray walls, white trim, and wood-look flooring; glass French doors and a blue LED accent wall tie the spaces together.
Area:
basement
Timeline:
8 weeks on site after permits and material delivery
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
We manage basement renovations like a well-run small construction project—transparent, timely, and code-compliant.
Project Steps:
- Site evaluation & measurement – We check head height, hydration, light access, and utilities
- Detailed proposal – Line-item pricing for framing, plumbing, insulation, finishes, waterproofing
- Permit submission – We secure Bellevue or King County permits for structural, plumbing, electrical, or windows
- Waterproof prep – Seal foundation walls, floor crack injection or liner install as needed
- Framing & systems install – Build stud walls, install wiring, rough-in plumbing and HVAC tie-ins
- Insulation & vapor barrier – Spray foam or batt insulation, enclosed vapor seal per energy code
- Finish & millwork – Buck frames, drywall, paint, floor install, cabinetry or trim detail
- Final walkthrough & inspection – We check layout flow, finishes, baseboard, outlets, doors, bathroom trim
One point of contact throughout. Same crew from demo to cleanup. No rotating subcontractors mid-job.
Materials to Use For your Basement
We use durable, local-approved materials that handle Bellevue’s climate and meet inspection standards.
Products We Install:
- Insulation – Demilec or Icynene spray foam, or Johns Manville R‑21 fiberglass with vapor barrier
- Waterproofing – Interior grade vapor barrier, perimeter drain setup, sump pump systems
- Framing & drywall – Pressure-treated bottom plates, fire-rated 5/8″ drywall on ceilings as needed
- Flooring – LVP, engineered hardwood, moisture-rated carpet or tile, installed over leveling system
- Egress windows & cast iron triple glazing – Ready-made and code-compliant units for full basement wall installs
- Fixtures – Kohler / American Standard low-flow toilets, tankless water connections if bathroom added
Local Bellevue Suppliers We Rely On:
- Dunn Lumber – Framing, windows, trim
- CFM – Flooring, underlayment
Every material we use is built for longevity, inspection-grade performance, and energy compliance. We don’t shortcut framing, skimp on insulation, or ignore waterproof testing — every room we finish is fully functional for everyday use.
FAQ
How much does basement finishing typically cost in Bellevue?
Can a finished attic be more economical than converting a basement?
What’s the typical timeline for a full basement remodel in Bellevue?
Are homeowners happy with DIY basement finishes?
Does finishing a basement really increase home value in Bellevue?
Contact Us
- 206-255-2708sales@renova.contractors
- 221 1st ave w, #247, Seattle, WA 98119
- Monday – Sunday 9:00AM – 9:00PM
