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

What multifamily in Concord looks like

Concord has one of central Contra Costa’s deepest apartment inventories. It includes 1960s and 1970s garden complexes along Monument Boulevard and Clayton Road, duplexes and fourplexes in older neighborhoods, newer mid-rise buildings downtown near Todos Santos Plaza and the BART station, and townhome projects in the medium-density zones. The city also has its own rent stabilization program, which shapes value more than anything else in a Concord underwriting. See financing 2-4 unit properties and apartment building loans.

Where the zoning allows it

Concord’s residential districts are in Chapter 18.30 of the Development Code. Multifamily and mixed-use projects also have to meet the objective design standards in Chapter 18.152.

The residential height limits can be raised with a use permit. Duplexes are prohibited in RL and RM parcels within the affirmatively furthering fair housing overlay, where the city wants multifamily density instead.

BART density bonus. The transit station overlay applies within half a mile of BART. It lets multifamily and mixed-use projects that are at least two-thirds residential exceed the base density by up to 25%. Parking can be reduced, and it must go underground or behind buildings.

ADUs and SB 9. We did not find ADU or SB 9 provisions in Chapter 18.30. They are likely handled in Division V (specific uses). See our ADU investment guide and SB 9 lot split guide. Note that ADUs are fully exempt from Concord’s rent program (below).

Rent rules: Concord rent stabilization

The Attorney General’s rent cap page lists Concord with a local cap of one increase per 12 months, up to 5%. It is lower than the statewide cap of 8.8% that applies in the San Francisco Area region from August 1, 2026. The program is in Chapter 19.40 of the Concord Municipal Code, amended by Ordinances 24-3 and 25-3.

Which units are covered. The code sorts units into three tiers:

Rent increases. Since April 1, 2025, a covered unit can get one increase of up to 5% of the prior 12 months’ lawful rent. Between April 2023 and March 2025, the cap was 60% of CPI with a 3% maximum. The code also ties increases to an August 1 to July 31 window and waives unused increases, so confirm timing with the city’s rent program before serving a notice. Concord allows vacancy decontrol, so rent can be reset when a tenant leaves voluntarily. A landlord may not raise rent on an unregistered unit or while fees are delinquent. Landlords can petition for a fair return increase based on base-year net operating income.

Just cause and relocation. Evictions require a listed at-fault or no-fault reason. Owner move-in has limits for long-term senior, disabled or terminally ill tenants, and there is a school-year defense for families with school-age children. No-fault evictions trigger relocation equal to three times the HUD Fair Market Rent for a comparable unit, plus a $3,000 moving stipend. Protected tenants get one more month. Half is due within 15 days of the notice. Penalties run $2,000 to $5,000 per violation. See our AB 1482 guide and just cause eviction guide.

Concord rental property rules

Registry. Landlords must register every covered unit through the city’s rent registry portal, pay the program fee set by council resolution and file annual reports. Termination notices must be uploaded to the portal within seven days of service. Unpaid fees can become a lien.

Anti-harassment. Chapter 19.50 (Ordinance 22-9) bars bad-faith conduct by owners and managers. It covers utility shutoffs, delayed repairs, excessive entries, misleading tenants about their rights and asking about immigration status. Damages are at least three times actual damages or $1,000, plus fees. A buyer inherits the seller’s management practices, so ask about pending tenant complaints.

Older complexes, balconies and seismic

Concord’s garden complexes typically have exterior stairs and elevated walkways. Buildings of three or more units with those features need SB 721 inspections. The pre-1995 buildings that fall under the rent cap are also the ones most likely to need deferred maintenance, and Concord’s code allows a temporary relocation per diem when tenants must leave for a substantial remodel. Have an engineer review tuck-under parking buildings for seismic retrofit. We did not find a mandatory soft-story program in Concord’s code.

Underwriting a Concord multifamily purchase

1. Pull each building’s certificate of occupancy date to place it in the right rent program tier.
2. Confirm every unit is registered and fees are current, since unregistered units cannot take increases.
3. Model renewals at no more than 5% a year for covered units, and plan turnover at market under vacancy decontrol.
4. Price relocation exposure for any planned renovation or owner move-in.
5. Collect leases, the rent roll, the registry history and estoppel certificates.
6. Add reassessed property tax and the county transfer tax of $0.55 per $500 (Clerk-Recorder) in our rental property analysis.

Questions people ask

Sources & notes

1. California Attorney General, Rent Caps
2. Concord Municipal Code, Chapter 19.40 Residential Tenant Protection Program and Chapter 19.50 Anti-Harassment (GoCodebook, current October 2026)
3. Concord Development Code, Chapters 18.30, 18.40, 18.45 and 18.105
4. Contra Costa Clerk-Recorder, Documentary Transfer Tax

Note: The registry fee amount and the city’s ADU chapter were not verified. The code’s increase-timing provisions do not fully reconcile, so confirm the current window with the city’s rent program.

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

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