Top-rated basement remodelers.

Get matched with top basement remodelers in Black Diamond, WA

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Basement remodelers in Black Diamond

Avatar for Be Home Remodeling
Be Home Remodeling
4.3(
13
)

Serving Black Diamond, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"It took us time to find a contractor. We got over Six quotes only two contractors actually sent us a bid. Ben was very responsive. He sent us the quote within a week from the visit. We were very satisfied with the process. We were always in the know. We have done renovations In the past with contractors and we were always not pleased with not knowing the schedule. We finally found someone we can trust and will definitely be using him again. Thank you again Ben it was a pleasure meeting you and working with you."
Response time9 hrs
Response rate99%
581 neighbors recently requested a quote
Avatar for Northwest Builders & Renovation, Inc.
Northwest Builders & Renovation, Inc.
4.7(
60
)

Serving Black Diamond, WA and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"The old deck was damaged and needed urgent repair. The North West Builders and Renovation team visited and after a consultation we came up with an idea for a new deck. Job well done, we love the new deck."
House Remodel, 2025
House Remodel, 2025
House Remodel, 2025
House Remodel, 2025
House Remodel, 2025

+32

Response time3 hrs
Response rate99%
35 neighbors recently requested a quote
Avatar for BZR Remodeling
BZR Remodeling
5.0(
3
)

Serving Black Diamond, WA and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"If your'e looking for trustworthy and stress free remodel, these are your guys. My wife and I were away for almost the entire project. Sean managed it wonderfully. He updated us every step of the way. Crew was great and respectful towards our home and neighbors. They did our master bathroom and hopefully we can start working on ideas for our guest bathroom. Excellent job BZR if i could give more than a 5 star I would."
Everett, Wa- Full Bathroom
Snohomish, Wa- Kitchen
Woodinville, Wa- Full Bathroom
Federal Way, Wa- Patio Renovation from old deck to stone walkways, retaining walls and pavers.
University Dr, Wa.- Kitchen

+7

6 neighbors recently requested a quote
Avatar for Iconiq Construction, LLC
Iconiq Construction, LLC
5.0(
18
)

Serving Black Diamond, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Offers commercial services

"This company is built internally the right way. Extremely professional and everything is in house. I repeat...IN HOUSE. If you have ever dealt with a remodeling company that employs outsourced labor, it can be a mis-quote nightmare. Other companies pointed me to handy men for this job not realizing I might need or want more than that in the future. Thank you "
kitchen remodel
Kitchen remodel
addition project
bathroom remodel
bathroom remodel

+2

Response time1 day
Response rate94%
3 neighbors recently requested a quote
Avatar for KMT Construction
KMT Construction
5.0(
17
)

Serving Black Diamond, WA and surrounding areas

Approved

In business since 2018

Free estimates

Customers say: Quick response

"Kevin did an amazing job, responded right away & accommodated my schedule.He built a wall, creating an office space.He made sure I am aware of all the steps & took pics of the frame and insulation before drywall was installed. He moved the thermostat and installed 2 outlets on the new wall. He painted the new room, living room, hallways and 1 bedroom. The paint underneath was dark blue, so he made sure to apply enough coats to cover it perfectly. He removed an iron chimney and covered the ceiling, also bringing the floor under the chimney to the same level as the rest of the living room and covered with hardwood. He installed a fan on my vaulted ceiling in an angle and a new light in the office space and left the house clean of all debris. I am beyond impressed by the quality of work and professionalism he showed from start to finish and I will definitely hire him again.He is reliable, accommodating, respectful & hard working.Hire Kevin without a doubt.You won't regret it."
Handymen Project
Handymen Project
Handymen Project
Kitchen and Bath Remodeling Project
Handyman Services Project

+101

Response time7 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for Fusion Builders
Fusion Builders
5.0(
14
)

Serving Black Diamond, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Emergency services offered

"We were looking for someone to remodel our kitchen in Kent and honestly didn’t know where to start. A friend from work mentioned Fusion Builders and said to ask for Daniel. I gave him a call and he came by the next day to take a look. From the first meeting, Daniel was super professional and easy to talk to—he gave us ideas we hadn’t even considered, like opening up the wall to the dining area for more light. The whole process went smoothly; his crew showed up on time every day, kept the area clean, and finished earlier than we expected. Now our kitchen looks completely different—bright, modern, and way more functional. We’ve already had family over and everyone keeps asking who did it. We’re really glad we found Daniel through that recommendation, and we’ll definitely call him again for our bathroom next!"
Open Concept Kitchen
BATHROOM REMODELING
bathroom remodel
BATHROOM REMODELING
Landscape in Maple Valley

+2

Response time12 hrs
Response rate89%
47 neighbors recently requested a quote
Avatar for Mendez Construction 1 Inc.
Mendez Construction 1 Inc.
4.8(
5
)

Serving Black Diamond, WA and surrounding areas

Approved

In business since 2020

Free estimates

Offers commercial services

"Mendez Construction did an excellent job. Great communication, very hard working, very high quality. These men worked very well together, they were efficient and careful. They also passed framing, wall & roof sheathing after first inspection. We've asked this contractor to come back and replace the roof on our existing home. I respect and trust this contractor. My wife and are both retired civil engineers and do pay attention to details."
Modern deck
Modern deck
Modern deck
Modern deck
Modern deck

+1

Response time5 hrs
Response rate91%
Recommended by60%of homeowners
Avatar for SmartDecks LLC
SmartDecks LLC
4.8(
36
)

Serving Black Diamond, WA and surrounding areas

Approved

In business since 1990

Free estimates

Warranties offered

"Little pricey, but you pay for expertise. He made my repair a priority and was in and out very quickly. He also took time to give me tips on upkeep. Great customer service, I would use him again!"
Patio Roof with Fireplace
Patio Roof with Fireplace
Big Waterproof deck
31 neighbors recently requested a quote
Recommended by100%of homeowners
...
Showing 1-10 of 796
FAQs for basement remodeling projects in Black Diamond, 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 Black Diamond, WA homeowners’ guide to basement remodelings

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