Multifamily and Duplex Properties for Sale in Clayton: Zoning and Rent Rules

What multifamily in Clayton looks like

Clayton is a single-family city, and multifamily property here is scarce. The stock is mainly a handful of apartment and townhome communities near the Town Center and along Clayton Road, a few duplexes and small buildings, senior housing, and a growing number of ADUs behind single-family homes. Because supply is thin, a Clayton purchase is usually a small building or a house with an ADU, and the zoning on the lot matters a great deal. See financing 2-4 unit properties and apartment building loans.

Where the zoning allows it

Clayton’s three multifamily districts are in Chapter 17.20 of the Clayton Municipal Code. The code sets density as land area per unit, so the per-acre figures below are our conversions.

In all three multifamily districts, duplexes through apartments are permitted uses. A new single-family home needs a use permit. Section 17.20.040 also provides that lot coverage, setback and open space rules cannot push an M-R-M or M-R-H project below 16 units. That protects a developer’s density on constrained sites.

Housing Element. The city’s Housing Element page says the City Council adopted the 2023-2031 Housing Element on January 17, 2023 and certified its EIR. The city later submitted revised drafts to the state in October 2023 and March 2024. The Council adopted Title 17 amendments to carry out Housing Element policies on January 16, 2024. The page refers to a regional housing need of 570 units. It does not state HCD certification, so confirm the current status and any rezoned sites with the city.

ADUs and SB 9. Clayton regulates ADUs in Chapter 17.47. We did not open it, so confirm size, setback and parking standards with the city. See our ADU investment guide and our SB 9 lot split guide. We did not find a local SB 9 chapter, so state law governs.

Rent rules: state law only

Clayton has no local rent cap on the Attorney General’s rent cap page, which lists only Antioch, Concord and Richmond in Contra Costa County. Covered Clayton units follow the Tenant Protection Act. Contra Costa is in the AG’s San Francisco Area region, where the cap is 6.3% for increases starting August 1, 2025 and 8.8% for increases from August 1, 2026 through July 31, 2027. Clayton’s next-door neighbor Concord has its own 5% cap, so check which city a property is actually in. Many Clayton rentals are single-family homes or condos, which can be exempt from AB 1482 if the owner is not a corporation or REIT and gives the required notice. Newer buildings may fall under the 15-year new-construction exemption. See our AB 1482 guide and just cause eviction guide.

Clayton rental property rules

We found no local rent registry, rental inspection program or relocation ordinance in Clayton’s code. State law sets just cause and relocation rules for covered units.

Short stays. Clayton charges a 4% transient occupancy tax on stays of 30 days or less. We did not find a short-term rental permit chapter in Title 17. Before relying on nightly income, ask the city whether short-term rental of a dwelling is allowed in the zone.

Transfer tax. The County Recorder charges $0.55 per $500. Clayton’s code imposes a city transfer tax of $0.275 per $500, which the Recorder administers. The Recorder does not list Clayton as adding a tax on top of the county’s, so confirm how it is applied on your deed.

Building age, balconies and hillside sites

Most Clayton multifamily buildings date from the 1970s onward. Buildings of three or more units with elevated balconies, decks or stairs need SB 721 inspections. Clayton sits close to the Clayton and Greenville fault systems and has hillside lots, so ask an engineer about foundations, drainage and seismic retrofit for any tuck-under parking building. We found no city soft-story mandate.

Underwriting a Clayton multifamily purchase

1. Confirm the zone (M-R, M-R-M, M-R-H, Town Center LC or PD) and calculate density from the land-per-unit standard.
2. Confirm the property is in Clayton, not Concord, since the rent rules differ.
3. Classify each unit under AB 1482 and model increases at the 8.8% statewide cap.
4. Check ADU potential under Chapter 17.47 and any Housing Element site designation.
5. Collect leases, the rent roll and two years of statements, and get estoppel certificates.
6. Add reassessed property tax, transfer tax and SB 721 costs in our rental property analysis.

Questions people ask

Sources & notes

1. California Attorney General, Rent Caps
2. Clayton Municipal Code (GoCodebook, 2026-10 edition): Chapters 17.20, 17.24, 17.28, 3.20 and 3.28
3. City of Clayton, Housing Element
4. Contra Costa Clerk-Recorder, Documentary Transfer Tax

Note: Chapter 17.47 (ADUs) and the parking chapter 17.37 were not opened. Housing Element certification status was not confirmed.

General information, not legal or tax advice. Last reviewed October 2026 by Matthew Martinez.

Related: Clayton real estate guide · Commercial real estate in Clayton · Multifamily investing guide · Investor services