Garage doors Antioch

Garage doors in Antioch, where the code still expects a two-car garage

Antioch's zoning code expects a detached house to park two cars in a garage, and the city's 2023 objective design standards say how a new home's garage should look: no wider than 60 percent of the front, set back or shaded by an overhang, with a door whose color and design stand apart from the wall and match the house's trim. The 2025 fire hazard map adds Very High zones inside the city, along the southwestern edge.

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  • Rules on this page checked against 14 public sources, October 2026
Antioch from the air in August 2018, with Winter Island and Browns Island on the river
Antioch from the air in August 2018, with Winter Island and Browns Island on the river. Photo: Pi.1415926535, CC BY-SA 3.0, via Wikimedia Commons.
Required parking
Two garage spaces per detached house, plus a guest space on the street
Double garage minimum
20 by 20 feet side by side; a single garage 10 by 20
Rivertown district
River to 10th Street, between L Street and A Street
2025 fire hazard map
Very High, High and Moderate zones in the city's LRA

Permits and local rules

Maps, standards and records behind the work

  1. The 2025 fire hazard severity zone map for Antioch

    The State Fire Marshal's map for the City of Antioch, dated February 24, 2025, shows Very High, High and Moderate zones in the city's local responsibility area, and the Contra Costa County Fire Protection District adopted the updated maps effective July 10, 2025. The city's 2025 local hazard mitigation plan confirms High and Very High zones within city limits. State and federal lands to the south carry their own designations.

    Contra Costa County Fire Protection District (opens in a new tab)

  2. Single-Family and Missing Middle Objective Design Standards

    Dated August 2023, Antioch's objective standards replaced the residential chapter of its design guidelines. Section 3.2.3 limits a front garage's visual presence, with the 60 percent width cap and a 12-inch overhang or recess, and Standard 3.2.3.B sets complementary garage door color and design. A separate section adds standards for single-family development in the Rivertown historic neighborhood.

    City of Antioch Planning Division (opens in a new tab)

  3. Design review for exterior changes

    The city's design review page says new buildings, exterior changes to existing buildings and permanent signs require Design Review approval, and that the Citywide Design Guidelines apply to new buildings, additions and exterior alterations but not to existing buildings with no such work proposed. Ask Planning whether a new door style, color or opening counts as an exterior change.

    City of Antioch Planning Division (opens in a new tab)

State license for this work: D-28 Doors, Gates and Activating Devices, B General Building. Look up a contractor's license on the CSLB website (opens in a new tab).

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Free to request, and you agree the scope and price with the person you hire before work starts. In California, a job over $1,000 in labor and materials, or one that needs a building permit, must be done by a contractor licensed by the CSLB in the right class. Ask for the license number and check it at cslb.ca.gov.

A newly installed brown metal garage door on a single-car garage
A newly installed brown metal garage door on a single-car garage. Photo: Famartin, CC BY-SA 4.0, via Wikimedia Commons.

The houses here

Two-car garages from the boom years, and Rivertown lots

By the housing element's count, more than half of Antioch's homes were built between 1980 and 2009, and more than three quarters of the city's homes are detached houses. The zoning code still asks for two parking spaces in a garage for each detached single-family house, sets a side-by-side double garage at 20 by 20 feet, and wants a garage's exterior to be architecturally compatible with the main building. Rivertown, the historic neighborhood between the river and 10th Street, adds design standards of its own for single-family development.

Part by part

Antioch neighborhoods where the door question changes

  • Along Southwood Way

    Save Mount Diablo's review of the 2025 maps notes that even some existing neighborhoods in Antioch face very high fire hazard, including those along Southwood Way. Check the parcel on the fire district's map before choosing door seals and vents.

  • Sand Creek

    The same review found almost the entire Sand Creek area, parts of it still being developed, in the High zone. When a door there is replaced, ask the installer which seals will close the gaps that wind-blown embers get through.

  • Rivertown

    The historic neighborhood bounded by the San Joaquin River, L Street, 10th Street and A Street has its own single-family design standards on top of the citywide ones, so a new garage or door there should suit the older house it serves.

The work

Garage door jobs on Antioch lots

  1. A door that matches the trim, not the wall

    Standard 3.2.3.B of Antioch's 2023 single-family design standards says the color and design of every garage door should vary from the wall plane next to it and match colors used on the home's exterior details. The standards govern new single-family development, and the Planning Division requires design review for exterior changes to existing buildings, so a door that changes color or style is worth checking with Planning first.

  2. Rebuilding a front garage

    When a garage is added or rebuilt at the front of a house, the same standards cap its width at 60 percent of the front elevation, bar it from projecting out of the surrounding wall, and require either an overhang at least 12 inches deep in the roof's materials and colors or a recess of at least 12 inches. A side-loaded attached garage instead sits at least 12 feet behind the main elevation.

  3. Closing up a garage for an ADU

    Antioch's ADU rules say that when a garage, carport or covered parking structure is converted to an accessory dwelling unit, or demolished to build one, the lost parking spaces do not have to be replaced. The garage door then comes out and the opening is framed in as wall, windows or an entry, under a building permit.

  4. Seals and openers on the southwest edge

    Save Mount Diablo's reading of the 2025 maps puts neighborhoods along Antioch's southern and southwestern borders in high fire hazard conditions. On those streets, the gaps around a garage door, at the bottom seal, the jambs and the header, are worth closing tightly, and a battery-backed opener matters on days when the power is shut off for fire weather.

Before you hire

Before an Antioch garage door installer starts

  • If the new door changes color or style, ask Planning whether design review applies before ordering.
  • Near Southwood Way or the southwest hills, ask how the installer will close the gaps at the bottom, sides and top of the door.
  • Confirm the new opener's battery backup in writing, and ask how many open-close cycles it gives.
  • Look up the D-28 license number at cslb.ca.gov, and ask who handles any new outlet for the opener.

Questions

Garage door questions Antioch owners ask

Does Antioch require my house to have a two-car garage?

The zoning code's parking table calls for two spaces in a garage for each detached single-family house, plus one guest space on the street close by, and sets a side-by-side double garage at 20 by 20 feet inside. It comes into play when a garage is added, rebuilt or converted, more than when a door is simply replaced.

What color should a new garage door be in Antioch?

For new single-family homes, Antioch's 2023 objective design standards say the garage door's color and design should vary from the wall around it and match colors used on the home's exterior details, such as its trim. For an existing house, ask Planning whether a change in color or style counts as an exterior change needing design review.

Can I turn my Antioch garage into an ADU without adding parking?

Yes. Antioch's ADU rules say that when a garage, carport or covered parking structure is converted to an accessory dwelling unit, or demolished to build one, the off-street parking spaces it held do not need to be replaced. The conversion itself still needs a building permit.

Did PG&E shut off power in Antioch during fire weather?

Contra Costa County's October 24, 2019 alert listed Antioch among the areas expected to lose power in the shutoff that began the night of October 26, with PG&E estimating that about 48,000 customers in the county could lose power and restoration possibly taking several days. Openers sold or installed in California since July 1, 2019 must have a battery backup for exactly that situation.

Where these facts come from

Checked against these public sources in October 2026. Rules and programs change: confirm permit requirements with the city before work starts, and a contractor's license on the CSLB website.

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