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Find Basement remodelers in Seattle

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

Serving Seattle, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"I hired Topaz Remodeling to replace my front porch, including tearing out the damaged surface, installing a proper drain (the original builder’s oversight caused major leaks), and repairing the resulting damage to the floor, hardwood, and basement. The owner’s communication was excellent, keeping me informed about schedules and progress. They even finished ahead of the estimated timeline. Omar, the project lead, was phenomenal. His recommendations elevated the final result, and his attention to detail was unmatched. The tilework is flawless, with precise measurements ensuring a polished look. The team delivered exceptional quality, turning a stressful situation into a seamless process. My new porch is beautiful and fully functional. I highly recommend Topaz Remodeling and will gladly use them again for future projects."
Kitchen Remodel
Bathroom Remodel
Kitchen Remodel
Bathroom Remodel
Kitchen Remodel

+53

Response time10 hrs
Response rate98%
221 neighbors recently requested a quote
Avatar for Johnson and Sons Construction
Johnson and Sons Construction
5.0(
95
)

Serving Seattle, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Warranties offered

"We waited 1 year from project completion before writing this review for the 'honeymoon' period to wear off... but it never did. We went into this project with our eyes wide open, having heard so many stories of other peoples remodel projects ending in less than stellar results. Our experience with Johnson and Sons, from planning and project quoting thru demo and remodel, more than met our expectations. We would not hesitate in using them again and/or recommending them to our friends and family for their projects."
Response time2 days
8 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Be Home Remodeling
Be Home Remodeling
4.3(
13
)

Serving Seattle, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"Renovations have never appealed to me, but this team made it easy. In addition to being gorgeous, my new kitchen is also practical. Their communication and attention to detail were excellent."
Response time9 hrs
Response rate99%
575 neighbors recently requested a quote
Gold Remodeling Inc
5.0(
137
)

Serving Seattle, 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
3 neighbors recently requested a quote
Avatar for JJ Construction & Home Solutions, LLC
JJ Construction & Home Solutions, LLC
4.9(
37
)

Serving Seattle, WA and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"JJ construction was my #1 choice for remodeling. I made my appointment with JJ construction. The person showed up on time and very thorough. We were very pleased by their expertise and their advice. However, I decided to sell the house as is. No work was done on my house. But I do recommend this company for future projects."
Ernie
Ernie
Ernie
Ernie
Ernie

+144

Response time5 days
Recommended by94%of homeowners
Avatar for BB-Builders-Pro LLC
BB-Builders-Pro LLC
5.0(
37
)

Serving Seattle, 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%
158 neighbors recently requested a quote
Avatar for Puget Sound Builders & Renovation
Puget Sound Builders & Renovation
5.0(
1
)

Serving Seattle, WA and surrounding areas

Approved

In business since 2006

Credit card accepted

Customers say: Quick response

"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

65 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Renovate Design/Build
Renovate Design/Build
5.0(
21
)

Serving Seattle, WA and surrounding areas

Approved

In business since 2018

Free estimates

Customers say: Quick response

"Initially we had hired them to work on my primary residence, but it turned out that we ended up using their help to fix a huge plumbing issue on my rental property as well due to the recent snow my basement for the rental was a water leak, Renovate Construction helped me get the issue resolved in 2 days. Amanda is a great owner her customer relations are extremely great, but my super thanks to RD Strange, the Lead, and all the employees of Renovate that peached in to help. I would recommend Renovate Construction, to anyone. They cleaned up after the job was completed. They were able to find the leak in the crawl area of the basement, they dig up around the house and fixed the drainage and sewer leak as well. They did a great job on my rental property. Thanks RD, the Crew, and Amanda for rescuing us with this unforeseen problem, when everyone else said they can come out 5 to 7 days from the issue took place, you Team was there in 30 mins after I placed the call to RD on Thursday. ...they will be working on replacing the roof for the same property this spring/ summer 2019. Jasmita Maharaj and Nilesh(Neil) Nath"
Madrona Basement Remodel - garage
Madrona Basement Remodel
Madrona Basement Remodel
Madrona Basement Remodel - stairs
Madrona Basement Remodel - bathroom

+74

Response time2 days
4 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Renovate Design/Build
Renovate Design/Build
5.0(
13
)

Serving Seattle, WA and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

"Everyone at Renovate was excellent to work with, communicated well, and obviously cared about doing quality work according codes and rules. Our project had a couple surprises (asbestos!), and we ending up spending more than we thought, but the whole team made it a positive experience, and we would love to work with them again on the next phase of our basement!"
Snohomish Mid-Century Modern Remodel
Wedgwood ADU Basement Remodel
Madrona Basement Remodel
Wedgwood Kitchen & Deck
Ravenna Basement Remodel

+107

1 neighbors recently requested a quote
Recommended by100%of homeowners
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Showing 1-10 of 1134
FAQs for basement remodeling projects in Seattle, 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 Seattle, WA homeowners’ guide to basement remodelings

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