Basement Remodeling in Bellevue
Bedrooms, family rooms and basement ADUs for Bellevue homes, planned around the city's permit rules and built by one licensed team.
- We match your basement to the right Bellevue permit, with or without plan review.
- Every new bedroom gets an escape opening sized to the state residential code.
- You sign off on an itemized, written price before framing starts.
By appointment. Limited start dates.
- Over 200 projects
- 4.9 on Google
- 20+ years building
- WA license VOLCABI792C6
Bellevue rules that shape a basement project
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The Bellevue rule
Finished or bare concrete decides the permit
Bellevue Development Services runs basements on two tracks. Turning a basement that is already finished into living or sleeping space is on its list of nonstructural projects that take a permit without plan review. Converting an unfinished basement into living space sits under the single family remodel permit with plan review, alongside moving a bearing wall.
What we doWe look at what is down there today, heated and finished rooms or bare walls and slab, and file on the matching track, with drawings whenever plan review applies.
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The Bellevue rule
Each basement bedroom needs its own way out
Bellevue enforces the International Residential Code as Washington amends it (Bellevue City Code 23.12.010). That code wants an escape opening in every basement sleeping room: 5.7 square feet clear, at least 24 inches high and 20 wide, a sill no higher than 44 inches, and a way out to a yard or street along a path at least 36 inches wide.
What we doIn an existing basement the code accepts an operable window that already opens 4 square feet, 22 inches high and 20 wide. We measure yours first, and where it falls short we cut a new opening and build a well of at least 9 square feet.
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The Bellevue rule
A basement unit is a second dwelling
Creating an accessory dwelling unit inside the house is on Bellevue's list of remodels that need plan review. The state code lets one interior ADU skip the fire rated wall and floor between the two homes, provided every required smoke alarm in both is interconnected so one alarm sets off all of them (WAC 51-51-0302 and 51-51-0314).
What we doWe plan the kitchen, the separate entrance and the linked alarms together, and check the land use rules for your lot before any drawing starts.
Headroom settles the floor plan. The code Bellevue adopts asks for 7 feet over basement living space and 6 feet 8 inches in a bathroom or laundry, and lets beams and ducts drop to 6 feet 4 inches (R305.1).
Basement work we take on in Bellevue
Three kinds of basement project, each run by one project manager from the first tape measure to the last city inspection.
Bedrooms and guest suites
A sleeping room with a qualifying escape window, a closet and a bathroom nearby. Once a permitted alteration happens, Washington's code asks for smoke alarms through the whole house that meet the standard for new homes, so we wire them in with the rest.
Family rooms, offices and gyms
Open rooms arranged around the stairs, furnace and water heater, with recessed lighting, outlets where the furniture goes, insulated foundation walls and flooring suited to a slab below grade.
Basement ADUs
A kitchen, a bathroom, a bedroom and a door of its own, permitted through plan review as a separate dwelling and wired so its alarms talk to the main house.
Everything a project with us can cover is on our basement remodeling page. For kitchens, bathrooms, additions and other work on your house, see home remodeling in Bellevue, and for detached units, ADU and DADU services.
Finished basements closest to Bellevue
None of our published basement projects is in Bellevue, so these come from the nearest: a Seattle basement across Lake Washington and a basement bathroom in Federal Way, each labeled with its own city.
Homeowners on working with our team
Volcano builders did a phenomenal job on my bathroom remodel. They exceeded my expectations on many levels. Their designer helped me pick out all the tile and bathroom accessories to make sure everything matched in style. Communication was great and response time very fast whenever I had questions for them. They estimated the project would take 5-6 weeks but finished in 4 weeks! Excellent job! Loooooove my new bathroom! Including pics of the Before… and the After!
Gad an amazing experience with Volcano Builders on my kitchen project. Bar my project manager was friendly. He make sure to keep me updated during the whole project. Also is team is very nice.
Had a great experience working with Volcano Builders on remodeling bathroom and flooring in my condo! Bar and his team were very professional from estimates to timely completion of the job! Highly recommend!
Volcano Builders did a great job on our master bathroom. The tile work and finishing touches were great. Even though they weren't the cheapest quote we got, you can tell they care about quality.
Just completed my inital meeting with Volcano Builders about my bathroom remodels and couldn't be happier with the interaction. On time, professional and extremely knowledge. Highly recommend you invite them out to see your next home improvement project!
Overall, we had a great time with Volcano Builders. There were a few small delays, but they were clear in their communication and kept things moving. The last kitchen remodel turned out great, and the quality seems like it will last for a long time.
Your Bellevue basement, walkthrough to final inspection
Three steps, one team, and a written price before anyone picks up a tool.
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Measure and assess
We measure clear height under every beam and duct, look at the walls and slab for moisture, check whether your windows could serve as escape openings and find where the sewer line leaves the house.
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Plan, price and file
You approve the layout and an itemized, written price, and we apply to Bellevue through MyBuildingPermit.com on the permit track your basement needs.
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Build with the inspector
Work opens with a pre construction meeting on site. The city inspector returns before any concrete is poured, before framing or insulation is covered and when the work is done. We book each visit, then walk the finished rooms with you.
Bellevue basement questions
Do I need a permit to finish a basement in Bellevue?
Yes. Bellevue lists turning a finished basement into living or sleeping space as work for its building permit without plan review, and converting an unfinished basement into living space as a remodel that goes through plan review. The city inspects the work on both tracks. Background reading: Unfinished Basement Requirements for a Livable Space.
How long does a basement remodel take?
The nearest basement on our project pages, in Seattle, took 10 weeks on site, and a basement bathroom in Federal Way took 3. Drawings and the Bellevue permit come first, and a basement on the plan review track waits for the city's review before work begins. See Basement Renovation Project in Seattle, WA.
Can my Bellevue basement become a separate unit?
Often, as an accessory dwelling unit. Bellevue treats an ADU created inside the house as a remodel with plan review, and the state code allows one interior ADU without a fire rated separation when the smoke alarms in both homes are interconnected. Size, parking and other lot rules come from the city's land use code, so we check them for your address first. More on ADU and DADU services.
What if my home is in a condo building or an HOA?
Bellevue's permit without plan review covers a nonstructural remodel of a privately owned condominium unit. Under RCW 64.90.255, and subject to the governing documents, an owner may alter a unit without impairing the structure or building systems but may not change the look of common elements without board approval. A new escape window and well change the outside, so we get that approval before digging.
How is a Bellevue basement remodel priced?
By scope. Whether the basement starts finished or bare, how many separate rooms it gets, any new escape window and well, and plumbing for a bathroom, wet bar or kitchen move the number most. We measure at a consultation and send an itemized, written price before work starts. For background, read How Much is a Basement Remodel?
Book your Bellevue basement consultation
Four quick steps. Tell us about your project and we’ll reach out to discuss it and see if we’re the right fit.