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Basement Remodel Bellevue WA – Convert, Finish with RENOVA Contractors LLC

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.

RENOVA Contractors LLC handles full-spectrum basement remodel Bellevue WA projects—from daylight walkout conversions to cozy rec rooms or home offices. We first walk your space, test for moisture, confirm ceiling height and egress compliance, then deliver a permit-ready plan. Whether you want a basement bathroom addition, gym setup, or family lounge, we manage framing, insulation, waterproofing, and finish work with our Bellevue-based crew. No subs. No unknown trades. You get clear scope, quotes you can trust, and a final space built to last city inspection standards.

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Basement Finishing Services in Bellevue by RENOVA

All Services
Kitchen
Bathroom
Cabinets
Countertops
Roofing
Siding
Tile
Flooring
Masonry
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 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

Detailed remodeling cost breakdown for Basement Finishing in Bellevue
ServiceCost RangeAverage CostLabor CostMaterial 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

Remodel ROI Calculator 2025

basement

$30,000 - $200,000

$70,000

NaN%

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.

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

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

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.

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