ADU Contractors near Federal Way, WA
Alfa Framing
7345 164th Avenue Northeast, Redmond, WA 98052
26.9 miles
Alfa Framing offers residential construction services including structural framing, siding installation, roofing, and ADU/DADU construction. Serving new builds and additions, they bring decades of experience and a solution-oriented approach.
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Anderbar Construction
12391 Glenwood Road Southwest, Port Orchard, WA 98367
18.7 miles
We specialize in building high-quality, custom Accessory Dwelling Units (ADUs) that provide both functionality and style for homeowners in Port Orchard, WA, and the surrounding areas. Whether you’re looking to add a rental property, create a cozy space for family, or simply expand your living area, an ADU is a versatile and valuable investment.
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Avead
3600 136th Place Southeast, Bellevue, WA 98006
20.5 miles
Avead is an ADU contractor offering full-service accessory dwelling unit construction, including attached, detached, junior ADUs, garage conversions, and custom builds. With 20+ years of experience, transparent pricing, and a 5-year warranty.
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Twin Brothers Group
14205 Southeast 36th Street, Bellevue, WA 98006
20.5 miles
Twin Brothers Group is a licensed framing contractor in Washington State specializing in ADU, DADU, garage conversions, and home additions across King and Snohomish County, serving Seattle-area GCs and owner-builders.
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Abel Construction LLC
Black Diamond, WA 98010
15.6 miles
Abel Construction LLC builds barndominium ADU shells in Black Diamond & Rochester. Ideal for rentals, guest suites & extra living space. Durable, cost-effective & customizable structures for property owners.
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Hammer & Hand
2450 6th Avenue South, Seattle, WA 98134
18.7 miles
Hammer & Hand is a Portland & Seattle general contractor with 30+ years of experience in new homes, remodels, ADUs & commercial builds. Employee-owned, they offer expert craftsmanship, custom woodwork & trusted subcontractor networks.
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Renovate Builders
4555 39th Avenue Southwest, Seattle, WA 98116
17.6 miles
Seattle Remodeling LLC
17202 Aurora Avenue North, Shoreline, WA 98133
30.8 miles
Seattle Remodeling LLC specializes in ADU construction in Seattle, offering mother-in-law suites, backyard cottages, garage conversions, and granny flats. They help homeowners add value, rental income, and flexible living space.
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DIGS Construction & ADU Builders
18727 North High Rock Road, Monroe, WA 98272
40.1 miles
DIGS is a trusted ADU builder serving King & Snohomish County, WA. They offer custom ADU/DADU design, permitting, construction, and site development, helping homeowners add rental income, property value, and flexible living space.
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Neil Kelly Washington
804 North Alberta Street, Seattle, WA 97217
24.2 miles
Neil Kelly Washington offers ADU design and build services in the Northwest, including detached ADUs, garage conversions, and attached units. Their team navigates local permits, balances design with functionality, and helps homeowners add value through custom accessory dwelling units.
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Northwest Builders & Renovation
1135 Lake Washington Boulevard North, Renton, WA 98057
14.8 miles
Verum Construction Inc
17461 147th Street Southeast, Monroe, WA 98272
41.5 miles
An ADU (accessory dwelling unit) is a secondary dwelling on a single-family lot. Types include basement apartments, garage conversions & detached cottages. Costs vary by size, design, permits & materials. Professional ADU contractors ensure smooth project execution.
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Puget Sound ADU Builders
4712 South Morgan Street, Seattle, WA 98118
16.5 miles
Puget Sound ADU Builders is a leader in ADU construction in western Washington state, excelling in design, construction, finishing, and permitting ADUs, DADUs, backyard cabins, garage conversions, duplexes, town homes, and multi-unit projects.
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Gordon T. Jacob - Multifamily | DADU | Remodel
6901 81st Street Court East, Puyallup, WA 98371
9.5 miles
Gordon T. Jacob is a family-run ADU builder and home remodeling contractor in South Puget Sound. Specializing in detached ADUs, backyard cottages, middle housing, and full home renovations in the Tacoma area.
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Seattle ADU Builders
4138 Baker Avenue Northwest, Seattle, WA 98107
24.1 miles
Emerald ADU Builders Seattle specializes in ADU design, permitting, and construction. They build detached ADUs, attached ADUs, and garage conversions, serving Seattle homeowners with quality craftsmanship and transparent pricing.
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Other cities in Washington
What you need to know
ADU Contractors in Federal Way, WA: Building in a Growing South King County City
Federal Way, Washington, is one of the fastest-growing cities in South King County, with a diverse population and a strong demand for affordable housing solutions. As the city continues to expand, Accessory Dwelling Units (ADUs) have become an increasingly popular option for homeowners looking to add rental income, house extended family members, or increase property value. Working with experienced ADU contractors in Federal Way, WA is essential to navigating the city's specific zoning codes, permitting requirements, and construction standards.
Federal Way ADU Regulations and Zoning Requirements
Federal Way operates under its own municipal code, separate from King County, which means ADU regulations are governed by the Federal Way Revised Code (FWRC). Homeowners and contractors must be familiar with these local rules before beginning any ADU project. Key regulations include:
- ADUs are permitted in single-family residential zones, including RS 5.0, RS 7.2, RS 9.6, and RS 35.0 zones.
- Both attached ADUs and detached ADUs (DADUs) are allowed, subject to lot size and setback requirements.
- The maximum size for a detached ADU is typically 1,200 square feet or 50% of the primary dwelling's square footage, whichever is less.
- Owner-occupancy requirements may apply, meaning the property owner must reside in either the primary home or the ADU.
- Setbacks, lot coverage limits, and height restrictions must all be carefully reviewed before design begins.
The Permitting Process for ADUs in Federal Way
Obtaining the proper permits is a critical step in any ADU construction project in Federal Way. The Federal Way Community Development Department oversees building permits, and all ADU projects must comply with Washington State Building Code (WSBC) as well as local amendments. A qualified ADU contractor in Federal Way will handle the full permitting process, including submitting architectural plans, site plans, and engineering documents. Permit timelines can vary, so working with a contractor experienced in Federal Way's specific review process can help avoid costly delays.
What to Look for in Federal Way ADU Contractors
Choosing the right contractor for your ADU project in Federal Way is crucial to a successful outcome. Here are some important qualities to look for:
- Local experience: Contractors familiar with Federal Way's zoning codes and permitting process will save you time and money.
- Licensing and insurance: Always verify that your contractor holds a valid Washington State contractor's license and carries liability insurance.
- Design-build capabilities: Contractors who offer both design and construction services can streamline the entire ADU process.
- Transparent pricing: Look for detailed, itemized estimates to avoid unexpected costs during construction.
Invest in an ADU in Federal Way Today
With Federal Way's growing rental market and rising property values, building an ADU is a smart long-term investment. Whether you're considering a garage conversion, basement ADU, or a brand-new detached unit, partnering with a knowledgeable ADU contractor in Federal Way, Washington ensures your project meets all local requirements and is completed to the highest standard. Start your ADU journey today and take advantage of one of South King County's most promising housing opportunities.