Our Services
ADU Construction
Add an Accessory Dwelling Unit to your property for rental income, family, or a home office.
4.9★ Rating·WA #EASTRRC786LS·BBB A+ Accredited·Family-owned · Founded 2022
About This Service
Accessory Dwelling Units are one of the smartest investments homeowners in the Greater Seattle area can make. Whether you need rental income, space for family, or a private home office, we handle the full ADU process — from feasibility assessment and permitting to design and construction. We know local codes inside and out.
What's Included
- Detached and attached ADU options
- Full architectural design
- Permit acquisition and code compliance
- Foundation and structural work
- Complete interior finishing
- Separate utility connections
- Landscaping and site work
- Rental-ready configurations
Our Process
1Free Consultation & Site Visit
2Custom Design & Detailed Estimate
3Permits & Material Selection
4Expert Construction & Finishing
5Final Walkthrough & Warranty
Common Questions
ADU Construction — answered
- How much does an ADU cost in Bellevue, Kirkland, or Redmond?
- Detached ADUs (DADUs) on the Eastside cost $350,000 to $650,000+ in 2026, depending on size, story count, finishes, and site complexity. A basic 400 sqft single-story unit with standard finishes lands at the low end. A 900 sqft two-story DADU with premium materials and structural complexity sits at the top. Older $250K estimates reflect pre-2023 pricing and no longer apply.
- How long does ADU construction take?
- Permitting typically takes 4–8 weeks across Eastside jurisdictions. Construction runs 5–8 months for a detached unit. Total timeline from signed preconstruction to certificate of occupancy is roughly 9–14 months.
- Do I need a permit to build an ADU on my property?
- Yes — every ADU requires a full building permit including site plans, structural engineering, energy compliance, and separate utility connections. Washington's HB 1337 eliminated minimum lot size requirements in most residential zones, and Eastside cities (Bellevue, Kirkland, Redmond, Sammamish) now allow both attached and detached ADUs on single-family lots.
- Can I rent my ADU?
- Yes — long-term rentals are allowed in all Eastside jurisdictions. Short-term rental rules (Airbnb, VRBO) vary by city; Bellevue, Kirkland, and Sammamish have specific permit categories. We'll walk through the rules for your address during preconstruction.
Get Started
Ready to Get Started with ADU Construction?
Contact us today for a free consultation. We will discuss your vision, walk through the process, and provide a detailed estimate tailored to your project.