ADU FEASIBILITY · WRITTEN VERDICT · MINUTES

Can you build a backyard home on your lot?

Enter your address. In minutes you'll have a written verdict: buildable or not, which ADU types qualify, your size limits, build cost, and projected rent. For your exact property.

$149 per addressRefund if your city isn't covered
PLAT · 120 OAK LNRUNNING CHECK
62 FT 120 FT 4 FT SETBACK10 FT REAR MAIN ADU850 SQ FT
BUILDABLE
Official data. County parcel records + your city's current ADU ordinance. Your exact lot. Real setbacks, drawn on your parcel. In minutes. No discovery call, no "it depends." No stake in your answer. We don't build ADUs, so the report has no reason to say yes.
THE DELIVERABLE

This is a real report. Yours looks like this.

120 Oak Lane, Menlo Park CA
REPORT NO. 0241 · GENERATED IN 4 MIN
BUILDABLE ✓
MAX ADU SIZE
850 sq ft
TYPE ALLOWED
Detached
ESTIMATED BUILD
$365K
PROJECTED RENT
$3,200/mo
SETBACKS DRAWN ON YOUR PARCEL: 4 FT SIDES · 10 FT REAR
40% LOT COVERAGE MAX
SOURCE: SAN MATEO COUNTY PARCEL RECORDS · MENLO PARK ADU ORDINANCE (REV. 2026)

For your address, in about 4 minutes. No discovery call, no PDF of fluff, no "it depends." Every number traces back to a public source.

  • 01A written buildable-or-not verdict for your exact lot
  • 02ADU types that qualify, your size limit, setbacks drawn
  • 03Ballpark build cost and projected rental income
  • 04If your lot's a gray area, the report says so and tells you what to ask your city
Check my lot · $149 →
THE TRANSLATION

Your city's ADU rules exist.
They're written for lawyers.

ADUable reads the ordinance so you don't have to, and maps it to your parcel.

§ 16.79.040(C) · MUNICIPAL CODE
YOUR REPORT · PLAIN ENGLISH
Yes. Detached ADU, up to 850 sq ft.
Keep 4 ft from the side lines, 10 ft from the rear.
You're using 31% of your allowed 40% lot coverage. You have room.
WHAT A WRONG GUESS COSTS

One wrong "probably fine" costs thousands.

WHAT SKIPPING IT LOOKS LIKEACTUAL CASE
Architectural plans, lot never qualified$8,000
Permit application fees, rejected$3,000
Months lost5
Feasibility check, never ordered$0
BurnedREJECTED

Skip the check and you can pay for it later: thousands in architectural plans for a lot that never qualified, permit fees on an application that gets rejected, months gone. A $149 read before a six-figure decision is the cheapest line item in the whole project.

Check my lot first · $149 →
THREE WAYS TO GET YOUR ANSWER · ONE MAKES SENSE

One price. One real answer.

DIY research
Free
  • Weeks of municipal PDFs
  • Contradictory forum threads
  • Ends in a maybe
Architect feasibility opinion
~$5,000
  • 4 to 6 week turnaround
  • Often a verbal opinion
  • Great, later, for the design
THE FIRST STEP
ADUable report
$149 / address
  • Written verdict, your exact lot
  • Data shown, sources cited
  • Refund if your city isn't covered
Check my lot →
HOW IT'S ACCURATE

How it's accurate, and what happens when it's ambiguous.

One wrong "buildable" costs you thousands. We treat that as the entire job.

SRC

County records, not estimates

Built from parcel records, measured setbacks, and your city's current ADU ordinance, updated when the rules change.

GRAY

Gray areas get flagged, not guessed

If your lot sits in an ambiguous zone, the report says so and gives you the exact questions to ask your city's planning desk.

NEXT

Cleared to build? You're contractor-ready

A buildable verdict comes with what a contractor needs to quote you straight: dimensions, constraints, and coverage math.

HOW IT WORKS

Three steps. About four minutes.

STEP 01ADDRESS

Enter your address

We match it to your exact parcel in the county records, lot lines and all.

STEP 02CHECK

We run the check

We pull your lot geometry and zoning, apply California ADU law and your city's ordinance, and measure your setbacks.

STEP 03VERDICT

Get your written verdict

A clear buildable-or-not report with size limits, build cost, and projected rent. Emailed to you, yours to keep.

WHERE WE COVER

Two counties. Your city's actual ordinance.

We go deep on San Mateo and Santa Clara rather than wide and shallow. If your city isn't here, you're refunded.

SAN MATEO COUNTY
Menlo ParkAthertonRedwood CitySan CarlosBurlingameSan Mateo
SANTA CLARA COUNTY
Palo AltoMountain ViewLos AltosCupertinoSunnyvaleSanta ClaraMore cities · soon
QUESTIONS

Straight answers.

Where do the numbers come from?

Your lot geometry and zoning come straight from county records. The rules come from California ADU law and your city's published ordinance. Build cost and rent are local estimates, clearly labeled as ranges.

Is this a guarantee I can build?

No. It's a clear, sourced feasibility read, not a permit. If your lot sits in a gray area, the report says so and tells you exactly what to confirm with your city.

Isn't a feasibility check free from ADU builders?

It is, because they want your six-figure build. We don't build, design, or sell anything downstream, and we never hand your address to a contractor. That's the whole point: the report has no reason to tell you yes. You get the straight read.

How fast is it?

Usually a few minutes. You enter your address, we run the check, and the report lands in your inbox.

What if my city isn't covered yet?

You get refunded automatically. We'd rather give you nothing than give you a guess.

YOUR LOT · YOUR VERDICT

The first question of any backyard build
is whether your lot qualifies.

Answer it now, before you fall for a floor plan.

Verdict in minutesFull refund if your city isn't covered
Sample figures shown on this page are illustrative · every report is generated live from county records for your address