Imagine a brand-new cottage in your backyardWithout paying it all upfront
Add Space handles permits, design and build. One team, zero stress. Answer a few quick questions to see if your property qualifies.
What's a DADU?
A detached accessory dwelling unit, basically a standalone cottage built in your backyard. Rent it out, house family, or use it as a studio. Seattle has made these easier to build in the last few years, but the permitting still has real rules.
How much does it actually cost?
Depends on size and finish level, which is exactly why we don't slap a number on this page. The quiz takes under a minute and gets you a real estimate for your actual lot, not a generic range that's wrong for your property.
Do I need to own the lot outright?
Yes, you need to own the property to start the permit process. If you're still in the process of buying, reach out once it closes and we'll get moving right away.
How long does the whole thing take?
Permits run 6 to 8 weeks typically. Design and build timelines depend on scope, David will walk you through a real schedule at your in-person estimate.
Is financing actually available?
Yes. We'll go over options at your in-person estimate once we know what you're building.
"I've worked with the owner David for years. He's handled all kinds of projects for me. I would highly recommend him & the team at AddSpace!"
About David
David has run Add Space DADU projects across Greater Seattle for years, handling permits, design, and the build himself instead of subcontracting it out to three different companies. When you book your free estimate, David shows up in person, not a call center, not a sales rep reading a script. That's the same guy whose name is on the reviews.
Do you own the home where you'd build?
What's the best number to reach you at?
Where should we send your free estimate?
What's your zip code?
So we can check your area's DADU rules and what's possible on your lot before your estimate.
How soon are you looking to start?
What kind of unit do you picture?
You're in.
Add Space will reach out shortly to schedule your free in-person estimate.
That's Add Space DADU confirming your appointment.
DADUs need property ownership
Building a backyard unit requires owning the lot. If you're about to buy, or you're working with the owner, reach out once that's sorted and we'll pick it up.