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Find Basement remodelers in Mercer Island

Avatar for A TO Z HOME REMODELING LLC
A TO Z HOME REMODELING LLC
5.0(
31
)
Basement - Remodel

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2024

Free estimates

Warranties offered

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Full kitchen remodel
Full kitchen remodel
Full kitchen remodel
Bathroom remodel
Full home remodel

+13

2 neighbors recently requested a quote
Recommended by9%of homeowners
Avatar for Topaz Remodeling, Inc.
Topaz Remodeling, Inc.
5.0(
141
)
Basement - Remodel

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%
265 neighbors recently requested a quote
Avatar for Johnson Custom Builders
Johnson Custom Builders
4.9(
102
)
Basement - Remodel

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Warranties offered

"Ryan and his team did a great job on our basement remodel. Communication was strong as was attention to detail. A concerted effort was made to keep the worksite clean. Like many renovations, it took longer than anticipated and we encountered a measurement hiccup that, while solved, could have been identified and addressed upfront"
Remodeling - General Project
Remodeling - Kitchen & Bathroom Project
Remodeling - General Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project

+75

Response time11 hrs
5 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for A TO Z HOME REMODELING LLC
A TO Z HOME REMODELING LLC
5.0(
30
)
Basement - Remodel

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

"I highly recommend A to Z Remodeling We were looking to remodel our kitchen in a timely fashion. From our initial meeting with Shay was the Project Manager. He was alway available to lend a helping hand, answer our questions and concerns and very personable. To the following people on A to Z team we thank you. To Rick who did our framing and made the impossible happen. To Bruce who did our plumbing. To Anatoli for his expertise in tile work. And last but certainly not least Gary. Gary did our finishing work. He worked above and beyond our expectations. He has a work ethic like no other. All of these skilled gentlemen are an asset to this company. It was a pleasure working with each and every one of them."
My jobs
My jobs
My jobs
My jobs
My jobs

+7

Response time12 hrs
Response rate99%
5 neighbors recently requested a quote
Avatar for ANYVISION HOME REMODELING INC
ANYVISION HOME REMODELING INC
5.0(
111
)
Basement - Remodel

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"I?m beyond impressed with how our remodel turned out with Anyvision remodeling. Chase and Dave delivered outstanding quality while staying on budget, which made the entire process smooth and stress-free. Every detail was thoughtfully executed, and the final space feels modern, comfortable, and truly personalized. We are so glad we work with Chase and Dave for our very first home remodeling project. It?s rare to find a project that runs on time, on budget, and still turns out even better than you imagined?but that?s exactly what we got. Couldn?t be happier with the experience and the transformation! Choose Anyvision home remodeling. They will take care of everything for you."
My jobs
My jobs
My jobs
My jobs
My jobs

+72

Response time3 hrs
Response rate100%
34 neighbors recently requested a quote
Avatar for Be Home Remodeling
Be Home Remodeling
4.6(
83
)
Basement - Remodel

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%
470 neighbors recently requested a quote
Avatar for GASHIN EMPIRE LLC
GASHIN EMPIRE LLC
5.0(
13
)
Basement - Remodel

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
2 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Anyvision Home Remodeling
Anyvision Home Remodeling
5.0(
21
)
Basement - Remodel

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

Recommended by66%of homeowners
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Showing 1-10 of 447
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.