ParcyAI
California property analysis

See what your lot can become.

Enter an address. Parcy checks your lot against California ADU rules and shows how many ADUs you can build, how big they can be, what they cost, and what they add. Free to use.

Advanced settings
Property type
Single-familyMultifamily (2+)
Book a consult →
Value added
$1.05M
Example lot
Build cost
$529k
$361 / sq ft
ADU rent / mo
$5,100
2 units
ROI
99%
Return on cost
Gross profit
$522k
After build
Parcy map view: buildable area, setbacks, existing home, and recommended ADUs on a real parcel
Add and resize ADUs; build cost, rent, and value update instantly
Save scenarios, compare properties side by side, and export a PDF
The app

Your lot, mapped. Your numbers, live.

Parcy draws the buildable area on your actual parcel, places the ADUs, and prices them with rents and costs from your neighborhood. Drag a unit and the numbers move.

8Max detached ADUs
25%Converted-space ADUs
2Valuation methods
60dMinisterial clock
What you get

Every number a developer would want, before you call an architect.

Parcy runs the same checks a feasibility studio runs on day one, in seconds, on a phone.

Rent

Live rental comps near your lot, sized to the unit you would actually build.

Build cost

Local per-square-foot pricing for detached, attached, and converted-space ADUs.

Value added

What your property is worth after the build, from the method the unit count calls for.

Return on cost

Profit divided by what you spend. The one number that decides whether to proceed.

Two valuation methods

Income approach and price per square foot, blended by unit count so the answer holds up with a lender.

Parcel data

Lot lines, zoning, setbacks, fire severity zones, and building footprints from county GIS.

How Parcy works

Address in. Buildable plan out.

1

Enter an address

Any California parcel. Parcy pulls the lot geometry, zoning, and existing structures.

Find ADU potential

See what you can build on any residential property.

1428 Maple AveTorrance, CA 90503
1428 Maple StSanta Monica, CA 90405
1428 Maple DrOakland, CA 94603
Property type defaults to Single-Family
Single-Family
Multifamily (2+)
Number of ADUs
1 default2 AB 956
Maximize value
Analyze property
2

See ADU potential

The engine applies California ADU law and local overlays, then shows what fits, what it adds, and what it costs.

Snapshot
Analyzing property
1428 Maple Ave, Torrance, CA 90503
Locating parcel
Mapping existing structures
Calculating buildable area
Running ADU placement
Estimating value & rent
1428 Maple AveTorrance, CA 90503
Feasible on your lot
See your ADU layout
Projected returns2 ADU proposal
Value added$529kadded to your property
Build cost$312kone-time
ADU rent / mo$3.1k$37k per year
Return on cost70%value per $ spent
Summary
Units & Layout
Edit ADUs
3

Edit ADUs and save

Drag a corner to resize, change the unit type or finish, and watch the live estimate update as you edit.

ADU 11 Bed / 1 Bath600 ft²
ADU 2Studio400 ft²
20.0' × 20.0'
4.0 ft
Done
ADU 02400 ft²
Stories1 Story2 Story
Unit typeStudio
FinishEconomy
Value added$529k+$56k
−
Build cost$312k+$31k
=
Gross profit$217k+$25k
Total rent / mo$3.1k
ROI70%
Live estimate · updates as you edit
4

Have our team build

Design, entitlements, construction, and lease-up, handled end to end by the group behind Parcy.

1428 Maple AveTorrance, CA 90503
Have our team build it for youNew

Partner with our expert development team. We can fund and build your entire project for you, start to finish.

Talk to our build team
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Connect with our architects and project managers. We'll be in touch within 24 hours.
Property
1428 Maple Ave, Torrance, CA 90503
Currently configured
• ADU 1: 1 Bed / 1 Bath · 600 sqft
• ADU 2: 1 Bed / 1 Bath · 880 sqft
Submit
Housing pathways

Built on California ADU law. More pathways on the way.

Parcy launches with the full set of state ADU rules for single-family and multifamily lots: detached ADUs, attached ADUs, converted-space ADUs, JADUs, and SB 1211. The next housing pathways are already in the engine's roadmap. Read every bill in the California ADU law index.

Available now

ADU law
State ADU statutesDetached, attached, and converted-space ADUs on any residential lot under Government Code § 66310 et seq.
SB 1211
Multifamily ADUsDetached ADUs up to the existing unit count, capped at eight, plus converted-space units up to 25% of existing units.
SB 543
2026 permit reformsDeemed-complete rule at 15 business days, 800 sq ft measured as interior space, no school fees under 500 sq ft.
JADU
Junior ADUsUp to 500 square feet within the existing home, with an efficiency kitchen.

Coming soon

SB 9
Urban lot splits and duplexes Coming soonUp to four homes on a single-family lot through a ministerial split.
SB 684
Small-lot subdivisions Coming soonUp to ten homes on multifamily-zoned parcels under five acres.
SB 79
Transit-oriented density Coming soonHigher heights and densities near major transit stops.
Density bonus
Affordability incentives Coming soonExtra units and height in exchange for affordable set-asides.
Valuation logic

Underwritten the way a lender reads it.

Unit count decides the method. Small projects are valued on sales comps. Larger ones on income. Four units get a weighted blend. Vacancy and expense assumptions are built in so the result is conservative by default.

1–3 units
Sales compsPrice per square foot against recent nearby sales.
4 units
60 / 40 blendIncome approach weighted with sales comps.
5+ units
Income approachNet operating income capitalized at a market rate, 5% vacancy and 35% expenses assumed.
ADU law guides

Read the law before you build.

Plain-English guides to the bills that decide what your lot can hold, written by the developers behind Parcy.

SB 1211: up to 8 detached ADUs on a multifamily lot

How the cap works, parking, converted-space units, and what it does to value.

Read →

California ADU laws 2026

SB 543, AB 1154, AB 462, and the rules still in force from 2025.

Read →

How much does an ADU cost in California?

Construction cost by type and size, permit fees, and what moves the number.

Read →

All guides ADU FAQ Law index

Get the app

Parcy is on your phone, and it is free.

Enter an address, see the ADUs your lot can hold, edit the layout, and save scenarios. No cost to download and run your property.

Download on theApp Store→ Google PlayComing soon Desktop / WebComing soon
Get started

Find out what your lot is worth with more units on it.

Run an address in the app, or book a consult with our development team and we will walk the numbers with you.

Book a consult → Meet the team