adustackSee a sample

From your own lot to real local prices.

For a San José homeowner with a single-family lot and an ADU in mind: for aging parents, grown kids, a home office, for rental income, or to build now and rent later.

(It ends at permit-proven contractors, and it never sells you a unit or your number.)

See a sample
Illustration of a wooden signpost holding a green board with a small white house and red roof
Sample

Sample lot readout

  • LotSan José, single-family
  • RulesCity + State
  • Size640 sq ft
  • Build cost$400,000
  • Rent$3,200 / mo
  • Yield9.6%

What one San José lot comes back as

adustack reads the lot from city records, applies City and State ADU rules, and gives size, build cost, rent and yield for each ADU that fits.

Sample readout. The figures are illustrative and do not describe a real lot.

Every ADU type that fits, drawn on your lot

Not a menu of what could exist somewhere. Only what your lot and the rules allow, drawn so you can see where it would sit.

Illustration of a fenced lot with a main house and a small cottage at the back

From lot to answer in three steps

  1. 1. Start with your lot

    adustack reads it from San José city records. No survey to find, nothing to fill in first.

  2. 2. Apply the rules

    City and State ADU rules are checked against that lot, so what you see is what the rules allow.

  3. 3. See what fits

    Every ADU type that fits is drawn, with its size, build cost, rent and yield.

Whatever your reason for an ADU

  • Aging parents

    A place of their own on your lot

  • Grown kids

    Close by, with a door of their own

  • A home office

    For your own use, steps from the house

  • Rental income

    Rent and yield come with every drawing

  • Build now, rent later

    Use it first, let it earn after

A guide that is not selling anything

  • No unit to sell you

    adustack does not sell ADUs. It shows what fits your lot and stops there.

  • No number to sell

    adustack does not sell your number, and it is free without signup.

  • Real local prices

    Build cost and rent come from real local prices, not a guess.

Illustration of a floor plan sheet with a red approval stamp and a blue pen

Then, contractors who are permit-proven

Once you know what fits and what it costs, the guide points to permit-proven contractors, so the next call is to someone with permits behind them.

Free, and without signup

The lot reading, the drawings and the numbers cost nothing, and there is no account to make before you see them.

Illustration of small white cottages with red roofs scattered across a pale green field

No unit for sale. No number sold.

adustack takes you from your own lot to real local prices and permit-proven contractors, and asks for nothing on the way.

See a sample
Generated image of a small sage-green backyard cottage in a California garden

Generated image, not a photograph of a real home.