Seattle DADU Feasibility
Seattle DADU Pro Guide
Free PDF by email · no payment
Everything Seattle homeowners and investors need to evaluate a DADU project before spending serious money on architects, permits, or consultants.
No payment. Enter your email and we’ll send the full Pro Guide PDF.
What's inside
- What Seattle currently allows — and what actually blocks a DADU
- Setbacks, size limits, height, and how much you can build
- Trees and site constraints that can reshape your project
- Sewer, water, and electrical — what to check before you commit
- Pre-approved plans vs. custom design
- Full permit and build process, step by step
- What to do after you build — rent, sell separately, or hold
- The 12 most common mistakes Seattle homeowners make
- Self-study checklist + site feasibility scoring template
Educational & preliminary. Not legal, architectural, or engineering advice. Updated for 2026 Seattle law.
Questions? Contact us.
Seattle DADU Pro Guide
Complete Feasibility, Code & Permit Reference for Seattle Homeowners
Contents
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Which should you get?
Pro Guide vs. Customized Report
The Pro Guide teaches you the rules and how to score your own lot. The customized report does the measuring for you, on your address, and hands you a finished analysis. If you want a clear answer on one specific lot, the report is the faster path.
Self-study
Seattle DADU Pro Guide
Free PDF by email · no payment
- The complete 2026 rules, explained step by step
- Setbacks, height, FAR, and lot coverage
- Trees, ECAs, and critical area rules
- Sewer, water, and electrical checklists
- Permit roadmap and 12 common mistakes
- A self-study feasibility scoring template
Done for you
Customized Feasibility Report
$149 one-time · delivered within 24 hours after a person reviews it
- Your parcel’s zoning, coverage, and unit eligibility
- Measured setbacks and a buildable-envelope estimate
- Tree canopy and critical areas mapped to your site
- Sewer, water, and electrical capacity flags
- A recommended permit path with realistic timelines
- Reviewed by a person before it reaches you