Top-rated basement remodelers.

Best basement remodelers near Sumas, WA

Enter your zip and get matched with up to 5 pros

Need a pro for your basement remodel project in Sumas, WA?

Select your specific project to find the pro for you.

Top-Rated Basement remodelers in Sumas - Updated Nov 2026

Avatar for Casali Remodeling, LLC
Casali Remodeling, LLC
4.8(
18
)
Basement - Remodel

Serving Sumas, WA and surrounding areas

Approved

In business since 2016

Free estimates

Warranties offered

"We highly recommend Casali Remodeling. We are over the moon happy about our downstairs remodel. The Casaliâ s really made the idea I had in my head come to life beautifully. Any issues that arose, as they always do with remodels, were handled with our satisfaction as the priority."
Completed deck
Interior Stairs
Master Bathroom
Remodeled Kitchen
The Deck

+283

Response time12 hrs
Recommended by100%of homeowners
Avatar for Emerybuilders, LLC
Emerybuilders, LLC
4.9(
65
)
Basement - Remodel

Serving Sumas, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"Emery Builders LLC was great to work with. Very prompt response and great communication throughout. Replaced kitchen sink garbage disposal unit and some pvc drain pipe. Did an excellent job! Would definitely use their services again! Highly recommended."
Bathroom Remodel
Bathroom Remodel
Bathroom Remodel
Bathroom Remodel
Bathroom Remodel

+81

Response time1 day
Response rate89%
12 neighbors recently requested a quote
Avatar for Unique Skagit Interiors
Unique Skagit Interiors
4.8(
26
)
Basement - Remodel

Serving Sumas, WA and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"Leo and helper rebuilt outdoor stairs and did a very nice job. He was quick and professional from first contact to job completion. But, he underestimated wood needed for replacement of deck boards and he didn’t bid the cleanup/disposal of removed wood so the quote was short by $300. I would recommend Leo just be sure the quote includes everything you want done."
Response time11 hrs
Response rate85%
19 neighbors recently requested a quote
Avatar for Isaacs Builders, LLC
Isaacs Builders, LLC
5.0(
9
)
Basement - Remodel

Serving Sumas, WA and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"We are very happy to have Isaacs Builders as our contractors. They do excellent work, are professional, friendly and family-oriented. They listen to our ideas and provided solid design suggestions that gave our space character, as well as the best flow and function. We will be contacting them for any future building/remodeling needs. We are glad to support such a quality family-owned and run business!"
Kitchen Remodel
My jobs
My jobs
My jobs
My jobs

+7

Recommended by33%of homeowners
Avatar for BC Bartholomew Construction LLC
BC Bartholomew Construction LLC
4.5(
6
)
Basement - Remodel

Serving Sumas, WA and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"I needed both the front and back decks cleaned, stained and some minor repairs. The team was careful and professional. The job was excellent. I also had them fix my two gates that were sagging. I would hire them again."
My Jobs
My Jobs
My Jobs
My Jobs
My Jobs

+15

Response time9 hrs
Response rate98%
2 neighbors recently requested a quote
Avatar for Burlingame Contracting
Burlingame Contracting
5.0(
16
)
Basement - Remodel

Serving Sumas, WA and surrounding areas

In business since 2015

Free estimates

Small jobs welcome

"I had a full bathroom remodel done by Burlingame. I was referred by a friend of mine and I am extremely happy with the work that was done. The crew was respectful, courteous, and cleaned up at the end of each day. Burlingame was easy to work with and assisted in the design choices along the way. When unexpected things came up, they always do, prompt notification was provided and any issues were addressed. I plan on having Burlingame remodel the guest bathroom and kitchen in the future. I’m extremely satisfied with the quality of the work and final product. I highly recommend their services!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+42

Response time2 days
Response rate100%
Recommended by100%of homeowners
Showing 1-10 of 46
Basement Remodel FAQs, answered by experts

Egress windows or doors are required in finished basements to meet safety and building codes. If your basement is unfinished and used as a storage space, egress windows are not required, but anything considered a habitable space must have an additional point of egress in addition to the stairs.

Yes, most general contractors require an initial down payment, typically between 10% and 25% of the total project cost. This upfront payment helps cover the costs of materials, permits, and subcontractors. The remaining project costs are usually billed after specific project milestones are reached or on set completion dates, as outlined in your contract. Be wary of contractors who require a significant deposit of 50% or more upfront, as this could be a red flag for a scam.

The difficulty of adding a basement to an existing house can vary depending on the house’s location, the size of the basement, and the type and condition of the existing foundation. Adding a basement is a job best handled by the pros, so you’ll need to enlist professional help for this project.

Costs are guided by renovation scope, materials chosen, project duration, structural needs, and labor. Prioritizing tasks prevents unforeseen expenses.

Unless you have extensive experience in construction work, remodeling a basement is best left to a professional. There are several tasks associated with this project that require exact precision, including:

  • Replacing insulation 

  • Replacing carpet or other flooring 

  • Adding heating and cooling

  • Adjusting or adding walls and doors

  • Altering or adding plumbing elements

If any of these elements is done incorrectly, it could severely impact the quality of your basement remodel and be dangerous. Changing a basement often comes with code safety requirements, like egress windows and proper ventilation. Therefore, leaving it up to a professional is often the best decision.

The Sumas, WA homeowners’ guide to basement remodels

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