Building a DADU in Seattle: Costs, Loans, and Strategy Guide

Is building a DADU in Seattle still worth it in 2026? We’re breaking down the exact numbers, from construction costs per square foot to the financing strategies that actually work in today’s market. What you’ll learn: Realistic build costs ($300–$400/sqft) and the true 9–12 month timeline. How to use hard-money or conventional loans to finance based on future value. Strategies for lot feasibility, utility navigation, and maximizing density. Tax strategies and design considerations for build-to-rent projects. This video is your complete 2026 roadmap for DADUs and ADUs in Seattle. Whether you are a homeowner looking for a rental unit or an investor exploring build-to-rent opportunities, we cover everything you need to know to build equity and long-term wealth. Ready to maximize your lot's potential? Watch the full guide and subscribe for the latest Seattle real estate investing strategies. What you'll learn: -- 0:00 Intro 0:52 Lot feasibility: best lot types for DADUs 5:15 Utilities: sewer, water, electrical, and planning for service upgrades 6:12 Cost to build: $300–$400 per sqft 6:47 Full project timeline: 9–12 months 7:49 Conventional loan strategy: permits + 95% LTV reno loan 10:23 Hard money strategy (investor-friendly) 12:47 Build-to-Rent wealth strategy explained 17:43 Loan qualification: using ADU/DADU rental income 21:05 Selling your DADU: tax rules, 1031, Section 121 23:44 Maximize design: why bigger is cheaper per sqft 24:33 High ceilings & structural design tips 27:32 Selling a DADU = condo creation, not SFR 34:06 Why Seattle supports DADUs: density & housing incentives Featuring: Michael Haas (HouseHack Seattle) -   / michaeljhaas   Kara Rozanski (Origin Point Mortgage) -   / kara-rozanski   David Weisser (Backyard ADU) -   / david-weisser   Israel Lopez (Certain Lending) -   / lopezre   💡 Want to learn more? 1. Setup a free, 1-1 Intro call: https://calendly.com/d/d4g-2c3-gg7 2. Join 1,000+ other investors at the largest & most active HouseHacking Meetup in WA State: https://www.meetup.com/house-hack-sea... 3. Find us online at https://househackseattle.com/ 4. Apply for a Hard Money Loan for your next investment here: https://www.certainlending.com/house-... 🤝 Special thanks to our sponsors: 🏦 Kara Rozanski - OriginPoint (Mortgage Lender) Trusted loan expert helping investors close tough deals. Avid multifamily investor herself — her latest duplex came through HouseHack Seattle! 🏗️ David Weisser - Backyard ADU (DADU Builder) Helping investors build DADUs efficiently with tight control on budget, schedule, and quality. 💰Israel Lopez - Certain Lending (Hard Money Lender) Former contractor and flipper turned expert loan officer specializing in new construction & BRRRR projects. 🏘️ Sagareus Property Management Streamlined leasing, maintenance, and inspections for serious investors building long-term wealth. 👉🏻 Follow us on Instagram:   / michaeljohaas     / jess_haas     / househackseattle   #househackseattle #seattlerealestate #realestateinvesting #landbuyingtips #brrrr #househacking #buildingwealth #realestate #seattlehomes #downtownseattle #pnwrealestate #seattlerealtors #2025 #success #mindset