Starting in Seattle with backyard homes
See what could
fit on your lot.
Backyard homes today, with houses and garages to follow. Every number a range, every assumption stated.
Start with your lot
From dirt to design, live.
Start from your lot
ZIP and lot area in — an estimated buildable envelope out.
More than one kind of building.
One parametric model underneath, many buildings on top — opening one building type and one market at a time.
Backyard homes
ADUs and cottages — a full second home on the lot you already own.
Available now
Houses
Ground-up homes, planned from the lot outward.
Coming soon
Garages & studios
Workshops, studios and storage beside the main home.
Coming soon
One model.
Every view.
Your building is stored once, as geometry. The floor plan, the areas, the fit on your lot, the 3D view and the cost range are all derived from it. Nothing drifts apart, because nothing is written twice.
Neutral
We recommend what fits you and your lot — not one vendor's catalogue.
Climate-aware
A snowy lot and a marine one get different answers. Seattle starts in zone 4C Marine.
Reasoning attached
Every number is a range with its assumptions written out.
Lot to build, in five steps.
01
Lot
ZIP in. Climate zone and feasibility out.
02
Configure
Building type, beds, baths, finish.
03
Visualize
See it in 3D with a live cost range.
04
Materials
A climate-appropriate spec.
05
Trades
Licensed local pros, matched through us.
Common questions
Do you only do ADUs?+
ADUs — backyard homes — are where we start, because Seattle makes them possible on most residential lots. Houses and garages are on the roadmap; the platform is built for any building your lot can hold.
What do I need to know about my lot?+
Just the ZIP code and the lot area to start. If you know your lot’s width and depth — your county parcel viewer has them — the feasibility band tightens considerably, because setbacks can then be applied to the real shape instead of a range of plausible ones.
Is this an official determination?+
No. These are early-stage estimates against an estimated envelope, built for planning. Only your jurisdiction decides what you may build, and a licensed professional must confirm anything before you rely on it.
Why do you show ranges instead of a single number?+
Because a single figure would imply precision the inputs can’t support. Every estimate we show is a band with the list of assumptions behind it — you can read exactly why the numbers are what they are.