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Find Basement remodelers in Mercer Island

Avatar for Topaz Remodeling, Inc.
Topaz Remodeling, Inc.
5.0(
137
)

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"I recently had my bathroom remodeled and I cannot express how satisfied I am with the results. The whole process was truly a breeze from start to finish, thanks to the exceptional team of professionals that I worked with. Thank you Topaz Remodeling Inc. you did an amazing job!"
Kitchen Remodel
Bathroom Remodel
Kitchen Remodel
Bathroom Remodel
Kitchen Remodel

+53

Response time10 hrs
Response rate100%
259 neighbors recently requested a quote
Gold Remodeling Inc
4.9(
230
)

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Emergency services offered

"We chose Gold Remodeling after talking to a few contractors, and I?m glad we did. They seemed more organized and realistic from the start. The basement remodel stayed close to the original timeline and budget, which doesn?t always happen. The crew worked hard and didn?t cut corners. It?s not perfect, but it feels well done and worth the investment."
My Jobs
My Jobs
My Jobs
My Jobs
My Jobs

+1

Response time2 days
Response rate100%
3 neighbors recently requested a quote
Avatar for Puget Sound Builders & Renovation
Puget Sound Builders & Renovation
5.0(
1,075
)

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2006

Credit card accepted

Customers say: True professional

"Puget Sound Builders & Renovation did an excellent job on our basement remodeling. The work was completed with great attention to detail and top-quality craftsmanship. A special thanks to the Marry, who was professional, skilled, and very helpful throughout the process. The final result exceeded our expectations?highly recommended!"
Bathroom Renovation
Basement Remodel
Bathroom Renovation
Basement Remodel
Kitchen Remodeling

+23

113 neighbors recently requested a quote
Avatar for Bello Home Solutions LLC
Bello Home Solutions LLC
5.0(
19
)

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

"Yariel and team did a terrific job remodeling my townhome. The job (paint, drywall repair, kitchen remodeling) was TOP QUALITY. Additionally, I truly appreciated the superb communication (scoping the work, fast quote, transparent scheduling and diligent updates). I will definitely be hiring them again for my next projects and highly recommend them to anyone looking for a professional remodeling team."
General Remodeling Project
Kitchen and Bath Remodeling Project
Kitchen and Bath Remodeling Project
Additional Photos
Additional Photos

+19

Response time9 hrs
1 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Johnson Custom Builders
Johnson Custom Builders
4.9(
102
)

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Warranties offered

"Ryan and his team completed an extensive basement remodel in our 1924 home. The basement work included new framing/drywall, windows (including a large egress window), plumbing and electrical to support a main living space, new bathroom and new laundry room. We also updated our old forced-air HVAC and water heather to new mini-splits and a tankless water heater. This is our second major project with Ryan and we plan to work with him for many years to come. He's incredibly responsive and detail oriented and always plans phases of our projects to support our future plans. Ryan's expertise and quality of work is well worth the cost."
Remodeling - General Project
Remodeling - Kitchen & Bathroom Project
Remodeling - General Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project

+75

Response time11 hrs
4 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Be Home Remodeling
Be Home Remodeling
4.6(
81
)

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"My bathroom underwent a complete transformation, which left me speechless. The team created a beautiful and useful space by using top-notch materials and their expertise. I'm so happy I decided to remodel with them!"
Response time9 hrs
Response rate100%
574 neighbors recently requested a quote
Avatar for ANYVISION HOME REMODELING INC
ANYVISION HOME REMODELING INC
5.0(
101
)

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"I was equally satisfied for the 2nd time working with ANYVISION Home Remodeling. They remodeled my master bathroom 7 months ago and just completed my new roof. Chase, again, followed through with everything he promised. The high quality materials, expert workmanship, minimal disruption and protection of property were exceptional. Both times, they completed the project ahead of schedule. I recommend ANYVISION Home Remodeling with confidence!"
My jobs
My jobs
My jobs
My jobs
My jobs

+72

Response time3 hrs
Response rate100%
58 neighbors recently requested a quote
Avatar for GASHIN EMPIRE LLC
GASHIN EMPIRE LLC
5.0(
13
)

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"I would recommend him and he is 5-star all the way. After our dishwasher leaked and ruin our floor, we had hired another a contractor to remodel our kitchen but found that he did not want to do because to him it was too small of a job. So, I found GASHIN EMPIRE LLC on Angie. He came out and looked at it and said that he would do it. He is very open, honest, he gave me a clear schedule and he was able to accommodate our needs. After waiting 4 months for our kitchen to get done he did it in 4 weeks. It is beautiful and all our guests just love what he has done. I would absolutely hire him again in the future."
Larry D Master Bathroom
Derek K bathrooms
Mary K kitchen
Anna J flood repair
David M. Master bathroom

+304

Response time5 days
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Anyvision Home Remodeling
Anyvision Home Remodeling
5.0(
20
)

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Customers say: True professional

"I had an outstanding experience with Anyvision Home Remodeling on my master bathroom remodel. Chase and his team were incredibly professional, reliable, and communicative, demonstrating true craftsmanship and attention to detail. In addition to the master bath, they also rebuilt a guest bathroom shower that had been poorly done by a previous contractor, and the difference in quality was remarkable. Their dedication to excellence exceeded my expectations, and after a frustrating experience with another contractor, it was a relief to work with a team that is both highly skilled and trustworthy. I highly recommend Anyvision Home Remodeling for anyone looking for a stress-free, top-quality renovation."
Remodeling - Kitchen & Bathroom Project
Kitchen remodeling
Bathrooms remodeling
Home remodeling
Remodeling - Kitchen & Bathroom Project

+187

1 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for BB-Builders-Pro LLC
BB-Builders-Pro LLC
5.0(
40
)

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Credit card accepted

"We couldn't be happier with our basement remodel! The team was professional, detail oriented and kept us updated throughout the process. BB Builders Pro exceeded our expectations with their quality work. Highly recommend them for any home improvement project!"
design rendering
design rendering
design rendering
design rendering
Approved floor plan

+50

Response time9 hrs
Response rate99%
97 neighbors recently requested a quote
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Showing 1-10 of 441
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.