LotFoundry · ADU planning tool
See what your backyard can earn.
LotFoundry looks up your property and estimates rent, build cost, and payback—before you spend money on plans.
Early estimate only. Local review is still required before design, permitting, financing, or investment decisions.
Sample ranges · cities we coverSeattle · Portland · Austin
Est. rent
$2,100–$2,600/mo
Yearly income
$22,400/yr
Payback
~12yrs
Build cost
$230K–$290K
Sample ranges for cities we cover—not your lot. Enter your address for figures based on your property. Estimates only, not guarantees.
How it works
From your address to rent, lot fit, and payback—before you spend on plans.
Enter your address
Start with the home you already own. LotFoundry pulls lot size, layout, and what is already built so the estimate matches your yard—not a stock example.
Input · street address
Map where an ADU can fit
Setbacks, size limits, and your ADU stay on one screen, placed on the lot in 3D. You see what fits—and what does not—before anyone bills an hour.
Output · lot map
See rent, cost, and payback
Estimated rent, build range, payback, and the assumptions behind them land in a report you can share with a planner, lender, or builder.
Output · owner report
What you get
Rent, lot fit, and a concept that looks like it belongs.
Concepts matched to your house, not a catalog.
Upload a photo of your home and the studio drafts ADU concepts that match its materials and style—so what you show a builder already feels like it belongs on your lot.
3D lot studio. Your house, setbacks, and the proposed ADU on one interactive scene.
Plain-language insights. Clear notes on what your lot’s numbers actually mean.
Owner report. Rent, build cost, payback, and assumptions—saved and shareable.
A full studio when you are ready to dig in.
Open the studio to drag the ADU around your lot, watch setbacks and coverage update, and keep the fine print honest. Estimates only—never guarantees.
What you walk away with
A report you can keep—and hand to a builder.
Save your estimate
When the numbers look solid, save them: rent, build cost, payback, and the assumptions behind them—as a Certificate of Feasibility you keep and share.
In the studio · certificate · paid
Meet local builders
Matched local builders review the same report and reply with real bids—no cold calls, no generic packages.
In the studio · builder connect
The certificate records estimates and concepts — it is not a permit, an appraisal, or a guarantee.
Certificate of Feasibility
Sample — your address replaces this
Est. rent
Build cost
$2,100–$2,600/mo
$230K–$290K
- Your ADU's size, style, and placement
- Estimated rent, income, payback, and lot coverage
- Honest fine print instead of empty promises
Ready when you are
Check your address. Get your numbers before you spend on plans.
Free to run. No permit is granted here and no income is guaranteed — you get an honest early read on your lot.
Coming soon
Take the studio outside.
The LotFoundry app is coming to iOS and Android—walk your lot with property lines, setbacks, and rent estimates in hand.