Seattle DADU Feasibility
Seattle DADU Pro Guide
$55
Everything Seattle homeowners and investors need to evaluate a DADU project before spending serious money on architects, permits, or consultants.
Sent to your email within 5 minutes
After payment you'll receive the full Pro Guide PDF by email.
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 13 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 before you buy.
Seattle DADU Feasibility
Updated May 2026
Seattle DADU Pro Guide
Complete Feasibility, Code & Permit Reference for Seattle Homeowners
Contents
1. Executive Summary
2. Current Seattle DADU Law
3. Zoning & Unit Eligibility
4. Site Geometry & Setbacks
5. Building Envelope Rules
6. Trees & Critical Areas
7. Utility Feasibility
8. Pre-Approved Plans
9. Permit Roadmap
+ 9 more sections
Get the Pro Guide — Secure Checkout
Stripe-secured payment. PDF sent to your email within 5 minutes. Educational & preliminary — not legal or engineering advice.