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Find Basement remodelers in Mercer Island

Avatar for Topaz Remodeling, Inc.
Topaz Remodeling, Inc.
5.0(
108
)

Serving Mercer Island, WA and surrounding areas

Angi Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"Renovating a home can be stressful, but this team made the entire experience smooth and exciting. They truly listened to what we wanted and helped bring our vision to life. Every room feels thoughtfully designed and carefully built. The attention to small details, the clean job site, and the respectful attitude of the crew made such a difference. Walking into our "new" home for the first time after the renovation was an emotional moment. We couldn't be happier with the outcome and are so grateful we chose them. "
Kitchen Remodel
Bathroom Remodel
Kitchen Remodel
Bathroom Remodel
Kitchen Remodel

+53

Response time10 hrs
Response rate98%
158 neighbors recently requested a quote
Gold Remodeling Inc
5.0(
122
)

Serving Mercer Island, WA and surrounding areas

Angi Approved

Super Service Award Winner

In business since 2017

Free estimates

Emergency services offered

"Gold Remodeling built a backyard deck for us at our home in Kirkland and it turned out better than expected. The design process was pretty straightforward, and they gave helpful suggestions without being pushy. What stood out to me was how respectful and polite the crew was throughout the project. They cleaned up at the end of each day and kept us updated along the way. The final result looks amazing and feels like it added real value to our home. Would definitely consider using them again!"
My Jobs
My Jobs
My Jobs
My Jobs
My Jobs

+1

Response time2 days
3 neighbors recently requested a quote
Avatar for Johnson Custom Builders
Johnson Custom Builders
5.0(
92
)

Serving Mercer Island, WA and surrounding areas

Angi Approved

Super Service Award Winner

In business since 2011

Free estimates

Warranties offered

"Ryan and his crew did a great job building out Car Port. From the first time we talked to a completed project was about 6 or 7 weeks. He and his crew were very professional and, came on time, and exceeded my expectations with respect to the quality, time to finish, etc. Ryan also collaborated with another team of professionals that were contracted to place Solar Pannels onto the Car Port that was just completed. He made sure that all of their requirements and spec were addressed while building the Car Port. THANK YOU Ryan and Co!"
Remodeling - General Project
Remodeling - Kitchen & Bathroom Project
Remodeling - General Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project

+75

Response time11 hrs
6 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for BB-Builders-Pro LLC
BB-Builders-Pro LLC
5.0(
37
)

Serving Mercer Island, WA and surrounding areas

Angi Approved

Super Service Award Winner

In business since 2000

Free estimates

Credit card accepted

"Our two bathrooms were remodeled by BB Builders Pro, who worked carefully with us and went above and beyond to ensure our satisfaction. Highly recommend them for any remodeling services!"
design rendering
design rendering
design rendering
design rendering
Approved floor plan

+50

Response time9 hrs
Response rate99%
120 neighbors recently requested a quote
Avatar for Thomas Driggers General Contractor
Thomas Driggers General Contractor
5.0(
25
)

Serving Mercer Island, WA and surrounding areas

Angi Approved

In business since 1981

Free estimates

Emergency services offered

"Excellent quality at a fair price. We remodeled our Kitchen, rebuilt the front porch, rebuilt our sunroom and deck with Thomas Driggers. He was always on budget and on time. Thomas takes pride in his work, He is highly recommended."
Window Replacement
Custom Concrete Work
Back Deck
Chimney Rebuilt
New Drip edge

+273

Response time3 hrs
Recommended by92%of homeowners
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FAQs for basement remodeling projects in Mercer Island, WA

Finishing a basement turns unused square footage into livable space and returns up to 70% of what you spend when you sell your home. Beyond that resale boost, you gain a playroom, home office, or guest suite you can start enjoying right away. That mix of daily comfort and solid return on investment (ROI) makes basement finishing one of the smartest upgrades you can tackle.

In some parts of the country—especially lots on swamps, high water tables, or other wetlands—local codes prohibit basements. Saturated soil puts constant pressure on foundation walls and lets water seep in faster than any sump pump can handle. 

If your property sits on waterlogged ground, building on a slab or crawl space is often safer, more affordable, and code-compliant.

Most basements wrap up in four to eight weeks. Framing takes three to five days, with electrical and plumbing rough-ins following over the next week. Add five days for drywall, two to three for flooring, and another week for paint, trim, and punch-list items. 

Delays can happen if materials run late or your contractor’s calendar is packed, so build in a little cushion when you plan.

Whether a finished basement counts toward your home’s official square footage depends on local rules. Many areas only include below-grade space if it has code-approved egress, fully finished walls, ceilings, and floors, plus consistent heating. 

Check with your local assessor or building department before you start; meeting those standards can affect taxes, appraisals, and resale value.

Building codes require a checklist: dedicated heat and electrical service, a code-approved stairway, and at least one egress window or exterior door. Walls, ceilings, and floors must be fully finished and meet insulation, ventilation, and fire-separation standards. If you add a bedroom, you’ll also need a closet, proper clearances, and safe exits. If you change the layout later, be ready to update the space so every new room still meets today’s code.

The Mercer Island, WA homeowners’ guide to basement remodelings

From average costs to expert advice, get all the answers you need to get your job done.