Bolthole Index

Contra Costa County, California

Zoning, building permits and septic rules in El Cerrito, California

El Cerrito, California requires a building permit for construction, alteration, repair, demolition and occupancy changes, and the City sets zoning in Title 19 of its Municipal Code12. Properties inside El Cerrito that use septic systems or wells are served by Contra Costa County Environmental Health, which must approve plans before a building permit application is submitted34.

At a glance

Building permit
Required to construct, enlarge, alter, repair, move, demolish or change occupancy of a building1
Zoning
City zoning under Title 19 of the Municipal Code2
Septic and wells
Contra Costa County Environmental Health reviews properties with septic systems and wells3
Building height
25 to 35 feet in single-family districts, depending on lot slope5
Accessory dwelling units
ADUs cannot be short-term rentals; rentals must be 31 days or longer6
Fees
Building permit fees are due when the permit is issued7

Who to call

Building permits

City of El Cerrito Building Division

Building permits and plan review inside El Cerrito city limits

510-215-4360

[email protected]

10890 San Pablo Avenue, El Cerrito, CA 94530

Planning & zoning

City of El Cerrito Planning Division

Zoning, planning applications and the zoning map for El Cerrito

510-215-4330

[email protected]

10890 San Pablo Avenue, El Cerrito, CA 94530

Septic permits

Contra Costa Health - Environmental Health Division

Septic construction permits, well permits, and site and soil evaluations through the Land Use Program

925-608-5500

2120 Diamond Boulevard, Suite 100, Concord, CA 94520

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Off-grid gear

Going off-grid in El Cerrito means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in El Cerrito, CA?

Yes. In El Cerrito, any owner or authorized agent who intends to construct, enlarge, alter, repair, move, demolish or change the occupancy of a building or structure must get a permit, and the same applies to electrical, gas, mechanical or plumbing systems1.

Building permit fees are due when the permit is issued7. A valid certificate of occupancy is required for all rental units8.

We could not confirm an owner-builder rule at the city level. California generally lets owners pull their own permits, but ask the Building Division before assuming it9.

Who issues building permits in El Cerrito, and how do you reach them?

The City of El Cerrito Building Division issues building permits inside city limits. Call 510-215-4360 or email [email protected]; the office is at City Hall, 10890 San Pablo Avenue, El Cerrito, CA 945309.

Contra Costa County's Department of Conservation and Development issues building permits only for unincorporated land, so it is not the office for a lot inside El Cerrito10. Septic and well review is the exception that stays with the county, covered below.

Does El Cerrito have zoning, and what does it mean for height and lot size?

Yes. El Cerrito's zoning ordinance is Title 19 of its Municipal Code, and zoning designations for an individual property can be found on the City's zoning map211. Call the Planning Division at 510-215-4330 for questions12.

Building height limits in single-family residential districts range from 25 to 35 feet, depending on the slope of the lot5. In the Community Commercial district, the cited subdivision project required a minimum lot size of 5,000 square feet13. Setbacks are set by district, and the RS-7.5 and RS-10 single-family districts each have their own table14.

Subdivisions must show proper and sufficient access to a public street15.

How do septic permits work in El Cerrito?

Contra Costa County Environmental Health, not the City, serves properties inside El Cerrito that have septic systems and wells3. Projects on septic-served properties need plans approved by Contra Costa Environmental Health before the building permit application is submitted4.

County rules require a permit to construct, alter or replace an onsite wastewater system, and inspections for permitted work1617. Water wells also require a permit18. Contact Contra Costa Health Environmental Health at 925-608-550019.

Soils are tough: only 0.5 percent of Contra Costa County soils avoid severe limits for a conventional drain field, so expect an engineered system20. We could not confirm sewer availability for any specific address; ask the Building Division.

Can you live in an RV or tiny home on your property in El Cerrito?

We could not confirm an El Cerrito rule on living in an RV or on tiny-home occupancy. Ask the Planning Division at 510-215-433012.

What the City does state: camping or parking a trailer coach, motor home or similar trailer on a public street or alley for longer than one hour between 2 a.m. and 6 a.m. is limited21. Manufactured homes placed in residential districts must have permanent hookups for electricity, gas, water and sewer22. ADUs cannot be short-term rentals unless the building permit was issued before January 1, 2020; rentals must run 31 days or longer6.

Building a home in El Cerrito: the steps, in order

  1. Look up the property's zoning on the City's zoning map and confirm height and setback limits115.
  2. If the property uses a septic system or well, get plans approved by Contra Costa Environmental Health first419.
  3. Apply to the Building Division for the building permit, along with any electrical, gas, mechanical or plumbing permits19.
  4. Pay building permit fees when the permit is issued7.
  5. For a rental unit, obtain a certificate of occupancy before renting8.

What stays with Contra Costa County, and what to check before you buy in El Cerrito?

Septic systems and wells stay with Contra Costa County Environmental Health, even inside city limits3. Contra Costa County's own zoning, RV and owner-builder rules apply to unincorporated land only, not to El Cerrito23.

Before buying, check the lot's zoning designation, whether it is on sewer, and whether it lies in a mapped flood hazard area, since the county requires a floodplain permit for improvements in a FEMA Special Flood Hazard Area in unincorporated areas24; ask the Building Division what applies inside the city9. We could not confirm El Cerrito rules on agricultural exemptions or minimum dwelling size.

Watch-outs

  • Building permit fees are due when the permit is issued, so budget for them before the permit is released7.
  • We could not confirm El Cerrito rules on RV living, tiny homes, owner-builders, lot coverage, or minimum dwelling size; call the Planning Division at 510-215-433012.

Sources

  1. Rental Inspection Corrections Form | El Cerrito, CA - Official Website (El Cerrito), quoted and re-checked
  2. Planning | El Cerrito, CA - Official Website (El Cerrito), quoted and re-checked
  3. City and Agency Directory | Contra Costa County, CA Official Website (El Cerrito), quoted and re-checked
  4. City and Agency Directory | Contra Costa County, CA Official Website (El Cerrito), quoted and re-checked
  5. Residential Architectural Design / RAD Information Sheet (El Cerrito), quoted and re-checked
  6. Accessory Dwelling Units | El Cerrito, CA - Official Website (El Cerrito), quoted and re-checked
  7. Building Division | El Cerrito, CA - Official Website (El Cerrito), quoted and re-checked
  8. Rental Inspection Corrections Form | El Cerrito, CA - Official Website (El Cerrito), quoted and re-checked
  9. City of El Cerrito Building Division (elcerrito.gov)
  10. Contra Costa County Frequently Asked Questions, quoted and re-checked
  11. Planning | El Cerrito, CA - Official Website (El Cerrito), quoted and re-checked
  12. City of El Cerrito Planning Division (elcerrito.gov)
  13. Subdivision Committee Staff Report, 10534 San Pablo Avenue (El Cerrito), quoted and re-checked
  14. Residential Architectural Design / RAD Information Sheet (El Cerrito), quoted and re-checked
  15. Subdivision Committee Staff Report, 10534 San Pablo Avenue (El Cerrito), quoted and re-checked
  16. OWTS Construction Permit Application, quoted and re-checked
  17. OWTS Construction Permit Application, quoted and re-checked
  18. Water Well Permit Application, quoted and re-checked
  19. Contra Costa Health - Environmental Health Division (cchealth.org)
  20. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  21. Code of Ordinances, Title 11, Chapter 11.40.050, Vehicle storage (El Cerrito), quoted and re-checked
  22. Code of Ordinances, Title 19, Chapter 19.20.140, Manufactured housing (El Cerrito), quoted and re-checked
  23. Planning and Zoning, quoted and re-checked
  24. FEMA Floodplain Management Program, quoted and re-checked

Written October 10, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for El Cerrito

El Cerrito’s own rules

  • Building permitRequired

    Construction, alteration, repair, demolition, occupancy changes, and regulated electrical, gas, mechanical, or plumbing work inside El Cerrito.

    • The owner or authorized agent must first apply to the building official and obtain the required permit.
    • The source states that the requirement is from the 2019 California Building Code section A 105.1.
    “Permit Required: Any owner or owner's authorized agent who intends to construct, enlarge, alter, repair, move, demolish or change the occupancy of a building or structure, or to erect, install, enlarge, alter, repair, remove, convert or replace any electrical, gas, mechanical or plumbing system, the installation of which is regulated by this code, or to cause any such work to be performed, shall first make application to the building official and obtain the required permit. (2019 CBC [A] 105.1).”
  • Certificate of occupancyLimited

    Rental units and ADUs inside El Cerrito.

    • A valid certificate of occupancy is required for all rental units.
    • For ADUs, the City states that final inspections precede issuance of a Certificate of Occupancy.
    • The rental-unit certificate is valid for two years.

    rental certificate validity: 2 years

    “A valid certificate of occupancy shall be required for all rental units.”
  • Local zoningPresent

    Land inside El Cerrito city limits.

    • The City publishes zoning and General Plan designations for individual properties and maintains Title 19 - ZONING.
    “The Zoning Ordinance is found in Title 19 of the Municipal Code.”
  • Zoning districtsPublished

    Zoning districts and property-specific zoning designations inside El Cerrito.

    • The City provides a GIS method for finding zoning and General Plan designations by property address.
    • The Planning page directs users to the City's zoning layer and labels.
    “turn on the zoning layer and labels under Planning”
  • Camping on your landLimited

    Camping, leaving, or parking a trailer coach, motor home, utility trailer, boat trailer, or personal-goods trailer on a public street or alley inside El Cerrito.

    • The prohibition applies between 2:00 a.m. and 6:00 a.m.
    • An emergency-repair exception applies when bona fide emergency repairs are completed within no more than twelve consecutive hours.

    maximum period during restricted hours: <= 1 hour (bona fide emergency repairs may continue for no more than twelve consecutive hours)

    “for a period exceeding one hour between the hours of two a.m. and six a.m.”
  • Mandatory utility hookupWater and sewer (with conditions)

    Manufactured homes placed in residential districts inside El Cerrito.

    • The manufactured home must have permanent hookups for electricity, gas, water, and sewer connections in the same manner applicable to permanent residences.
    • The source does not establish a universal availability-distance rule for all new homes.
    “permanent hookups for electricity, gas, water, and sewer connections”
  • Driveway accessRequired

    Subdivision projects inside El Cerrito.

    • The Subdivision Committee must determine that proposed lots have proper and sufficient access to a public street.
    “the lots will have the proper and sufficient access to a public street.”
  • Short-term rentalsLimited

    ADUs inside El Cerrito.

    • ADUs cannot be used for short-term rentals unless the building permit was issued before January 1, 2020.
    • Rentals must be 31 days or longer.
    • The restriction does not apply to Junior ADUs.

    minimum rental duration: >= 31 days (Junior ADUs are excluded; ADUs with building permits issued before January 1, 2020 are excepted)

    “ADUs cannot be used for short term rentals, unless the building permit was issued before January 1, 2020. Rentals must be 31 days or longer. This does not apply to Junior ADUs.”
  • Permit processPublished (with conditions)

    Building-permit applications inside El Cerrito.

    • Applications may be submitted online or by email with a complete permit package.
    • The Building Division routes projects requiring plan review to internal City departments.
    • Applicants are responsible for forwarding documents to designated outside agencies.
    • Permit fees are based on scope and project valuation; plan-check fees are due at submittal and building fees upon issuance.
    • Credit-card payments incur a non-refundable 3.5% service fee.
    “Building permit fees are due upon permit issuance.”

Rules another office applies inside El Cerrito

El Cerrito does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • Minimum lot sizeSpecified

    Community Commercial (CC) zoning district in El Cerrito, for the cited subdivision project.

    • The San Pablo Avenue Specific Plan did not contain minimum lot-size standards, but the applicable CC district provisions required each created lot to be at least 5,000 square feet.
    • The source is project-specific and does not establish the minimum lot size for every residential district.

    minimum lot area: >= 5000 square feet

    “requires a minimum lot size of 5,000 square feet.”
  • SetbacksSpecified

    RS-7.5 single-family residential zoning district inside El Cerrito.

    • Minimum setbacks are front 20 feet, rear 15 feet, interior side 6 feet, and corner-lot street side 8.5 feet.

    front setback: 20 feet · rear setback: 15 feet · interior side setback: 6 feet · corner-lot street-side setback: 8.5 feet

    “RS - 7.5 20 15 6 8.5 RS – 10 20 20 6 8.5”
  • Building heightSpecified

    Single-family residential districts inside El Cerrito.

    • The source states that height limits vary according to lot slope.
    • Height is generally measured from the highest point of the structure to the ground directly below; sloped-lot measurement rules are described by reference to Section 19.03.050.
    • Daylight-plane requirements also control upper-story height and horizontal extent.

    height limit: 25-35 feet (depends on lot slope)

    “Building height limits in single-family residential districts range from 25 to 35 feet, depending on the slope of the lot. See Figure 19.06-B on page 3 of this document. The building height allowed by right is referred to as "base height,” while the height that may be allowed through a special application process (See p. 6) is referred to as “maximum height.””
  • Who permits septicCounty (with conditions)

    Properties inside El Cerrito with septic systems or wells, where Contra Costa County Environmental Health handles environmental-health review.

    • The County directory states that Contra Costa County Environmental Health serves properties with septic systems and wells.
    • Stege Sanitary District serves El Cerrito for sanitary-district matters.
    “Contra Costa County Environmental Health serves properties with septic systems and wells.”
  • Septic permitRequired

    Projects on septic-served properties inside El Cerrito that are not served by a public sewer.

    • Plans must be approved by Contra Costa Environmental Health before building-permit application submittal.
    • The requirement applies to properties with septic systems that are not served by a public sewer.
    “need plans approved by Contra Costa Environmental Health prior to building permit application submittal.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask El Cerrito or Contra Costa County directly.

  • Owner-builder exemption — Owner-builders performing construction inside El Cerrito.
  • Minimum dwelling size — Residential districts inside El Cerrito.
  • Lot coverage — Residential districts inside El Cerrito.
  • Living in an RV — Long-term RV occupancy on private land inside El Cerrito.
  • Tiny homes — Tiny-home occupancy inside El Cerrito.
4 more unanswered
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Agricultural exemption

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that El Cerrito publishes no rule on the point, not that none exists. Contra Costa County’s page lists the county offices to call.

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