Los Angeles · rules updated October 2026

Know what you can build.Before you buy.

Enter an address. See every home California law allows on that lot, in 3D, with the numbers.

Top of funnelA free address check with no signup. Every search is an owner or investor raising a hand.

Sample parcel

2718 S Cochran Ave

Mid-City, Los Angeles 90016 · APN 5046-012-031

Within ½ mile of E Line light rail
Zone
R2Two-family
Lot
12,200 sf1,133 m² · 100 × 122 ft
On the lot
VacantNo structures
Transit
Expo/La Brea0.4 mi · Tier 2

RetentionWatched parcels get an alert when a new law changes what they can hold. SB 1123 and SB 79 both changed this map in the last 15 months.

Original plan

3homes

3 lots, needs a parcel map hearing

With 2026 state law

22homes

via SB 79, with items to confirm

Fastest approval

20homes

via SB 684 in 60 days. No hearing, no appeal.

Pathways

39 rule checks

Every legal route for this lot. Tap one to see it.

EligibleSB 684 · 20 homes
New homesADUsExisting
Drag to rotate
Homes
20
Lots
10
Height
32 ft
Coverage
49%
Approval
60 days, no hearing

MoatA versioned rules engine: seven state laws plus Los Angeles' own implementation, each rule tied to its statute and effective date.

Why SB 684 works here

9 of 9 passed
Every required condition is met. 20 homes on the lot.

The numbers

Project cost

$10.2M

incl. $2.00M land

Rent per month

$65K

20 new homes

Net income per year

$517K

after vacancy and expenses

Yield on cost

5.0%

Moderate

Home typeCountSizeRent
Small-lot home, 3 bed101,270 sf$5K/mo
Attached ADU, studio10350 sf$2K/mo

Compare pathways

PathwayNewYield
Today32.7%
ADUs42.7%
SB 684205.0%
SB 79223.0%

Planning assumptions: hard costs $275–475 per sf by home type, 25% soft costs, LA park fees near $8,400 per home and school fees of $4.08 per sf (source), ADUs under 750 sf exempt from impact fees, 5% vacancy, 30% operating costs. Rents and prices are demo samples for Mid-City.

Pro tierThe full pro forma, scenario compare and export sit behind Pro. The free check stops at homes and status.

Your project team

Sample profiles

Architect

Northlight Studio

Designs the small-lot homes and attached ADUs to LA standards. Small-lot homes and ADUs, 31 LA projects.

Surveyor and civil engineer

Arroyo Survey Co.

Prepares the tentative and final map for the subdivision. Parcel and tract maps across LA County.

Construction lender

Coastline Construction Lending

A construction loan sized to this pro forma. ADU, small-lot and ground-up loans.

MarketplacePros pay for introductions to owners who already know what they can build and what it pencils to.

One rules engine, versioned by date.

Every answer traces to a statute or a city rule with an effective date. When a new law takes effect, every saved parcel is scored again.

SB 9

Two homes per single-family lot and a lot split, no hearing.

AB 1033

ADUs can be sold as condos. Los Angeles opted in.

SB 684

Up to 10 homes on 10 small lots in multifamily zones.

SB 450

SB 9 gets a 60-day clock and tighter limits on local rules.

SB 1123

The SB 684 path opens to vacant single-family lots.

AB 1061

SB 9 reaches historic districts, structures untouched.

SB 79

Minimum heights and densities near major transit.

ZIMAS · LA GeoHubLA County AssessorCAL FIRE hazard zonesFEMA flood zonesLAHD rent stabilizationSCAG transit mapRentCast comps