Los Angeles Zoning and ADU Guide for Homeowners and Sellers

Last updated November 13, 2026. Reviewed by the Cash Home Buyers CA team. Information comes from Los Angeles City Planning and LADBS; sources are listed at the end.

To find the zoning on a Los Angeles property, use ZIMAS, the Zone Information and Map Access System run by Los Angeles City Planning. It shows a lot’s zone and the overlays and plans that can limit what you can build or add, which matters if you are selling a house with a back unit, converted garage or plans for an addition.

Los Angeles zoning and ADU at a glance

How do I find the zoning for a Los Angeles property?

Open ZIMAS, search the address or parcel number, and look under the Planning and Zoning menu for the zone. The same tool tells you whether the lot sits in a historic overlay, specific plan or design overlay, any of which can change what is allowed. City Planning also lists public counters you can contact if the result is unclear.

What are the ADU rules in Los Angeles?

The City’s ADU ordinance took effect on December 19, 2019, and City Planning’s Zoning Administrator Memo No. 143 explains how it works alongside state ADU law.

According to that memo, state law requires the city to approve certain ADUs and junior ADUs, and for a junior ADU the single-family home must be owner-occupied, the JADU cannot be sold separately from the home, and no parking is required for it.

Size, setbacks and the number of units allowed vary by ADU type and lot, so check the memo and ZIMAS for your property before you rely on a general rule.

Selling a Los Angeles house with an ADU or converted garage

A permitted ADU is part of the property and can matter to buyers. An unpermitted unit is different: LADBS responds to complaints about construction without permits, and the current owner is responsible for complying with any order.

LADBS’s AB 2533 streamlined permitting for an unpermitted dwelling unit may let an owner legalize a unit as an ADU or JADU, but it takes time and cost, and you should confirm eligibility with LADBS.

How to sell a house in Los Angeles with an ADU or zoning problem

1. Check the zone and overlays in ZIMAS.
2. Check the permit history for the unit. See our Los Angeles building permits guide.
3. Compare options: legalize the unit, sell with a price credit, or sell as-is to a cash buyer who prices the risk in.
4. Disclose honestly. Known unpermitted work should be disclosed.

We buy Los Angeles houses as they are, with no repairs or showings. See how we buy houses in Los Angeles.

Not sure what your zoning or unit means for a sale? Call (424) 435-2326 or request a cash offer. There is no cost and no obligation.

Reading ZIMAS before you list

ZIMAS, the city’s zoning information system, is the first stop for any Los Angeles lot. It can be searched by address, street intersection, Assessor Parcel Number, case number or community plan area.

Beyond the zone itself, it shows whether the site sits in a Historic Preservation Overlay Zone, a Specific Plan, a Community Design Overlay or a similar layer, and those layers can change what is allowed on the lot.

Print the ZIMAS report for your property and keep it with your disclosure papers; a buyer’s agent will almost certainly pull it too.

The unpermitted-unit pathway

LADBS has a streamlined path to permit an unpermitted dwelling unit as an ADU or JADU under state law AB 2533. For owners who inherited a house with a converted garage or back unit, this matters: it means legalization may be possible without tearing the unit out.

Ask LADBS what inspections and corrections would be required, because the work needed to bring an older unit up to code can still be substantial. LADBS also runs an Approved Standard Plans Program for ADUs, which can shorten the design step for a new unit.

How the city ordinance and state law interact

The city’s ADU ordinance is Ordinance No. 186,481, effective December 19, 2019, and state law has been amended several times since. Where state law is more permissive, it generally controls, so a summary written years ago may understate what is allowed. Our California guide to selling as-is with unpermitted work explains the sale-time risks of an unpermitted unit.

Questions to ask before you sell a Los Angeles house with a back unit

• Does LADBS have the unit on record as an ADU, a JADU or an accessory building?
• Is the lot in an overlay zone or Specific Plan that adds rules?
• Could the unit qualify for the unpermitted-unit pathway, and what would it cost?
• Is anyone living there, and under what agreement?

Los Angeles zoning and ADU FAQ

How do I look up zoning in Los Angeles?

Use ZIMAS, City Planning’s web-based mapping tool, and search by address, parcel number or other fields.

Can I sell a house in Los Angeles with an unpermitted ADU?

Yes. It can complicate a traditional sale, so disclose it and choose between legalizing it, discounting the price, or selling as-is to a cash buyer.

Can I legalize an unpermitted unit in Los Angeles?

LADBS has a streamlined permitting process for an unpermitted dwelling unit as an ADU or JADU under AB 2533. Confirm eligibility with LADBS.

Does a junior ADU need the owner to live there?

According to City Planning’s Memo No. 143, the single-family home in which a JADU is permitted must be owner-occupied.

What is ZIMAS?

ZIMAS is the city’s zoning information system. It can be searched by address or parcel number and shows zoning and overlays such as Historic Preservation Overlay Zones and Specific Plans.

Can an unpermitted Los Angeles unit be legalized?

LADBS has a streamlined path to permit an unpermitted dwelling unit as an ADU or JADU under state law AB 2533. Ask LADBS what inspections and corrections would be required.

Sources

• Los Angeles City Planning: Zoning Search (ZIMAS)
• City Planning: ZA Memo No. 143 (ADUs and JADUs)
• LADBS: Accessory Dwelling Unit (ADU)

This guide is general information, not legal advice. Zoning and ADU rules change; confirm with City Planning and LADBS.