Bolthole Index

San Diego County, California

Zoning, building permits and septic rules in Imperial Beach, California

The City of Imperial Beach, California adopts its own zoning code (Title 19)1, and its Building Division issues building permits inside city limits2. Premises within 200 feet of a public sewer must connect to it instead of installing a septic tank3. Living in an RV is unlawful on most city property4. San Diego County's rules cover only unincorporated land5.

At a glance

Zoning
City zoning code, Imperial Beach Municipal Code Title 191
Building permits
Issued by the City Building Division, not San Diego County2
Building code
2025 California Residential Code adopted for homes6
Septic
Not allowed when a public sewer is within 200 feet; farther out, we could not confirm7
RV living
Unlawful except in a licensed mobile home park or for up to 30 days of guest or remodeling use4
Manufactured homes
Allowed in the city's residential zones under conditions8
Minimum lot (R-1-6000)
6,000 sq ft for new lots9
Wells
San Diego County Environmental Health permits wells countywide10

Who to call

Building permits

City of Imperial Beach Building Division (Community Development Department)

Plan review, building, plumbing, mechanical and electrical permits, and inspections inside Imperial Beach city limits; the phone number is the inspection hotline

619-628-1360

825 Imperial Beach Blvd

Planning & zoning

City of Imperial Beach Planning Division (Community Development Department)

Zoning questions, zoning verification and planning applications inside Imperial Beach city limits

825 Imperial Beach Blvd

Septic permits

San Diego County DEHQ Land and Water Quality Division, Onsite Wastewater Systems

County onsite wastewater system design review and installation inspections; whether it handles septic inside Imperial Beach is unconfirmed

(858) 565-5173

lwqdduty@sdcounty.ca.gov

5500 Overland Avenue, Suite 110, San Diego, CA

Contact details are copied from each office’s official page and were checked against it on October 23, 2026.

Off-grid gear

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

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Does Imperial Beach, California have zoning?

Yes. The City of Imperial Beach administers its own zoning code, Imperial Beach Municipal Code Title 19, which sets allowed uses, setbacks, height and parking inside city limits1. Zones are adopted by ordinance and shown on the city's land use map11. The Planning Division can verify the zoning of a specific parcel12.

Rules differ by district. In the R-1-6000 single-family zone, new lots need at least 6000 square feet, the front yard is 20 feet, side yards are 5 feet, and buildings top out at the lesser of two stories or 26 feet91314. In the R-1-3800 zone, new lots need at least 3800 square feet and the front yard is 15 feet1516. Small-lot provisions in chapter 19.42 may change these minimums9. Lot coverage limits and minimum home size we could not confirm; ask the Planning Division.

Do you need a building permit in Imperial Beach, and who issues it?

Building permits inside Imperial Beach come from the city's own Building Division, which reviews plans, issues building, plumbing, mechanical and electrical permits, and performs the inspections2. San Diego County's Building Services Division serves only unincorporated land, so its counter is the wrong office for an Imperial Beach address17.

The city has adopted the 2025 California Residential Code for one- and two-family homes, with an exception in chapter 15.06.020 that we did not review6. We could not confirm the city's list of work exempt from a permit, its fee schedule or its owner-builder rules, so ask the Building Division before assuming any project is exempt. California's statewide owner-builder licensing exemption does apply here, but it only covers contractor licensing, not the permit18.

Applications go through the city's Citizen Self-Service portal, and an account is required first2.

How do septic permits work inside Imperial Beach?

Septic is the narrowest part of the answer. No one whose premises have a public sewer within 200 feet may install a septic tank or use any other means of disposal except a connection to the city sewer, and the owner pays for the building sewer and lateral37. Most city lots are close enough to sewer lines that this rule decides the question.

For a parcel with no public sewer nearby7, we could not confirm who permits an onsite system or what the city requires. Ask the Building Division first, then the San Diego County Department of Environmental Health and Quality's Onsite Wastewater Systems program, which does septic design review and installation inspections for the county19. In unincorporated San Diego County the county permits septic systems, and its authority can extend into cities that formally delegate it20.

Can you live in an RV or tiny home in Imperial Beach?

RVs: mostly no. Using a trailer, camper or motorhome for living or sleeping anywhere in the city is unlawful, with exceptions for a licensed mobile home park, for up to 30 days of temporary use by relatives, guests or visitors of someone who lives in a property with a dwelling, and for owners or tenants during remodeling or reconstruction421. A camper counts as lived in if water, electricity or sewer is connected, other than a connection of 24 hours or less for cleaning or maintenance4. So an RV on a vacant lot while you build is not a safe plan.

Manufactured homes are different: the city allows them in its R-1-6000, R-1-3800, R-3000-D, R-3000, R-2000 and R-1500 zones if the home is no more than 10 years old, federally certified, on a permanent foundation and has a roof overhang of at least 12 inches8.

We could not confirm any Imperial Beach rule on tiny homes; ask the Planning Division before buying one.

Building a home in Imperial Beach: the steps, in order

  1. Confirm the parcel's zoning district and its setbacks, height and lot-size rules with the Planning Division12.
  2. Check whether a public sewer is within 200 feet, because that decides whether a septic system is even an option3.
  3. Create a Citizen Self-Service account and apply for building permits with the Building Division2.
  4. Design to the 2025 California Residential Code the city has adopted6.
  5. Request inspections through the inspection hotline or the portal; inspections run Monday through Thursday from 9 am to 2:00 pm2.
  6. Ask the Building Division what it requires for final approval; we could not confirm how the city handles certificates of occupancy.

What stays with San Diego County, and what to check before you buy in Imperial Beach

Land outside city limits follows different rules. The county's zoning ordinance applies only to areas that are not part of a city5, so see the San Diego County page for unincorporated parcels. Water wells are regulated by the county's Department of Environmental Health and Quality throughout San Diego County10; we could not confirm a separate city well rule.

Before you buy, also check flood zone status and any short-term rental limits with the city, since we could not confirm either. County-wide, the effective property tax rate is 0.7%22 and the typical home value is $940,98623.

Watch-outs

  • San Diego County's building, zoning and RV rules apply to unincorporated land only; inside Imperial Beach, the city's Building Division and Planning Division are the offices to call212.
  • Septic where no sewer is nearby, permit exemptions, fees, accessory dwelling units and tiny homes are not confirmed for Imperial Beach, so ask the Building Division and Planning Division before relying on them212.
  • Living in a camper with utilities connected counts as using it for living or sleeping, which the city treats as unlawful outside a licensed mobile home park4.

Sources

  1. Zoning - City of Imperial Beach official website (Imperial Beach), quoted and re-checked
  2. City of Imperial Beach Building Division (Community Development Department) (imperialbeachca.gov)
  3. Chapter 13.04 Sewers (eCode360) (Imperial Beach), quoted and re-checked
  4. Chapter 19.68 Manufactured Homes, Mobile Homes, Campers, Trailers and Manufactured Housing Community (eCode360) (Imperial Beach), quoted and re-checked
  5. Zoning Ordinance, quoted and re-checked
  6. Chapter 15.04 Residential Code (eCode360) (Imperial Beach), quoted and re-checked
  7. Chapter 13.04 Sewers (eCode360) (Imperial Beach), quoted and re-checked
  8. Chapter 19.68 Manufactured Homes, Mobile Homes, Campers, Trailers and Manufactured Housing Community (eCode360) (Imperial Beach), quoted and re-checked
  9. Chapter 19.12 R-1-6000 Single-Family Residential Zone (eCode360) (Imperial Beach), quoted and re-checked
  10. Water Well Program, quoted and re-checked
  11. Zoning - City of Imperial Beach official website (Imperial Beach), quoted and re-checked
  12. City of Imperial Beach Planning Division (Community Development Department) (imperialbeachca.gov)
  13. Chapter 19.12 R-1-6000 Single-Family Residential Zone (eCode360) (Imperial Beach), quoted and re-checked
  14. Chapter 19.12 R-1-6000 Single-Family Residential Zone (eCode360) (Imperial Beach), quoted and re-checked
  15. Chapter 19.13 R-1-3800 Single-Family Residential Zone (eCode360) (Imperial Beach), quoted and re-checked
  16. Chapter 19.13 R-1-3800 Single-Family Residential Zone (eCode360) (Imperial Beach), quoted and re-checked
  17. Building Division Home, quoted and re-checked
  18. California Contractors State License Board - Owner-Builder Overview (2026 county census)
  19. San Diego County DEHQ Land and Water Quality Division, Onsite Wastewater Systems (sandiegocounty.gov)
  20. San Diego County Code § 68.301, Purpose and Scope (2026 county census)
  21. Chapter 19.68 Manufactured Homes, Mobile Homes, Campers, Trailers and Manufactured Housing Community (eCode360) (Imperial Beach), quoted and re-checked
  22. Effective property tax rate: Bolthole Index county data
  23. Typical home value (Zillow): Bolthole Index county data

Written October 23, 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 Imperial Beach

Imperial Beach’s own rules

  • Building code adoptedAdopted

    Residential construction inside Imperial Beach city limits (one- and two-family dwellings under the California Residential Code).

    • Adoption is 'except as provided in chapter 15.06.020' of the city code; that exception was not opened and may modify this adoption.
    • The chapter history note reads 'ord. 2025-1256, 10/1/2025'; the page does not label that as an effective date, so effective_at is left null.
    • Title 15 index states the 2025 California Administrative Code is adopted as part of the building and fire codes (Title 24, Part 1); the exact adoption text was not opened and is not claimed here.
    “except as provided in chapter 15.06.020, the 2025 california residential code (california code of regulations title 24, part 2.5) is adopted and incorporated by reference as the residential code of the city of imperial beach.”
  • Local zoningPresent

    Land inside Imperial Beach city limits: the city administers its own zoning code, Imperial Beach Municipal Code Title 19.

    • The city's own page names the code 'ibmc title 19'; it does not apply to unincorporated San Diego County land.
    “the city of imperial beach zoning code (ibmc title 19) dictates what uses are allowed and how you can develop land (e.g. setbacks, height, parking, etc.) within the city's jurisdiction.”
  • Zoning districtsPublished

    Land inside Imperial Beach city limits: zone districts adopted by ordinance under Title 19.

    • Zones are shown on the city's official land use map (zoning map), not restated in the zoning page text.
    • Single-family districts confirmed on eCode360: R-1-6000 (Ch. 19.12) and R-1-3800 (Ch. 19.13).
    “various zones specify a category of uses (such as; single-family residential, multifamily residential, commercial) and are adopted by ordinance.”
  • Minimum lot sizeDistrict specific (with conditions)

    New lots created in the R-1-3800 single-family residential zone inside Imperial Beach city limits

    • Small-lot provisions in sections 19.42 may modify this minimum; not opened.
    • Minimum street frontage of 50 feet for new lots (§ 19.13.050).

    minimum lot size: >= 3800 sq ft (small-lot provisions, chapter 19.42)

    “the minimum lot size for any new lot created in the r-1-3800 zone shall be three thousand eight hundred square feet, (for related provisions concerning small lots, see sections 19.42.).”
    One more reviewed finding on this topic
    • District specific (with conditions) — New lots created in the R-1-6000 single-family residential zone inside Imperial Beach city limits
      “the minimum lot size for any new lot created in the r-1-6000 zone shall be six thousand square feet (for related provisions concerning small lots see chapter 19.42.).”
  • SetbacksDistrict specific (with conditions)

    Main buildings in the R-1-6000 single-family residential zone inside Imperial Beach city limits

    • Front yard 20 ft; garage front 20 ft.
    • Side yard 5 ft; rear yard 5 ft if on an alley and 10 ft if no alley; street side yard 10 ft.
    • Separation of 10 ft from any other building on the same lot (§ 19.12.070).

    front yard: >= 20 feet (garage front must be set back a minimum of 20 feet) · side yard: >= 5 feet · rear yard: >= 5 feet (5 ft if on alley; 10 ft if no alley) · street side yard: >= 10 feet

    “there shall be a minimum front yard of twenty feet, provided that the front of a garage shall be set back a minimum of twenty feet.”
    One more reviewed finding on this topic
    • District specific (with conditions) — Main buildings in the R-1-3800 single-family residential zone inside Imperial Beach city limits
      “there shall be a minimum front yard of fifteen feet, provided that the front of a garage shall be set back a minimum of twenty feet.”
  • Building heightDistrict specific (with conditions)

    Buildings and structures in the R-1-3800 single-family residential zone inside Imperial Beach city limits

    • Height limit is the lesser of two stories or 26 feet.

    maximum height: <= 26 feet (or two stories, whichever is less)

    “no building or structure shall exceed two stories or twenty six feet in height, whichever is less.”
    One more reviewed finding on this topic
    • District specific (with conditions) — Buildings and structures in the R-1-6000 single-family residential zone inside Imperial Beach city limits
      “no building or structure shall exceed two stories or twenty-six feet in height, whichever is less.”
  • Living in an RVLimited

    Living or sleeping in a trailer, camper or motorhome on private property inside Imperial Beach city limits

    • Unlawful except within a licensed mobile home park, or temporary use not exceeding 30 days for relatives, guests or visitors of owners or tenants of a property with at least one dwelling unit, or by owner or tenants during remodeling or reconstruction.
    • Other exceptions via § 19.24.025, not opened.
    • A camper is treated as used for living or sleeping if water, electricity, sewer or other utility is connected, except a temporary connection of 24 consecutive hours or less for cleaning or maintenance (§ 19.68.020).

    temporary use period: <= 30 days (relatives, guests or visitors of owners or tenants; owner or tenants during remodeling or reconstruction)

    “it is unlawful to use a trailer, camper or motorhome for living and/or sleeping purposes on any property within the city except as follows:”
  • Camping on your landLimited

    Use of trailers and campers for living or sleeping on private property inside Imperial Beach city limits (tent camping not addressed)

    • Only the trailer, camper and motorhome rule in § 19.68.010 was verified; tent or other camping rules not located.
    • Temporary use limited to 30 days for relatives, guests or visitors, or during remodeling or reconstruction.

    temporary use period: <= 30 days (relatives, guests, visitors; remodeling or reconstruction)

    “when used on a temporary basis, not to exceed a period of thirty days, for relatives, guests or visitors of the owners or tenants of a property containing at least one dwelling unit or by the owner or tenants of the property during property remodeling or reconstruction.”
  • Manufactured homesAllowed (with conditions)

    Manufactured homes placed in the R-1-6000, R-1-3800, R-3000-D, R-3000, R-2000 and R-1500 residential zones inside Imperial Beach city limits

    • Home must not be more than ten years old between manufacture and permit application.
    • Must be certified under the National Manufactured Housing Construction and Safety Standards Act of 1974.
    • Occupied only as a single-family residential use; subject to all residential zoning provisions.
    • Attached to a permanent foundation system per applicable building regulations.
    • Roof overhang of twelve inches or more.
    • Manufactured housing community requires a conditional use permit (§ 19.68.040).

    maximum age at permit application: <= 10 years · roof overhang: >= 12 inches

    “it is the purpose of this section to allow the placement of manufactured homes in the r-1-6000, r-1-3800, r-3000-d, r-3000, r-2000, and r-1500 zones.”
  • Off-grid sanitationProhibited

    Onsite septic or other private sewage disposal for premises inside Imperial Beach city limits where a public sewer is within 200 feet of the place of origin of sewage

    • Only the within-200-feet case is established; premises farther than 200 feet from public sewer are not addressed by this claim.
    • Connection and permit details are in chapter 13.04.

    distance to public sewer: <= 200 feet

    “no person whose premises are so located that a public sewer is within 200 feet of the place of origin of sewage on the premises shall install any septic tank or use any means of disposing of such sewage other than through a connection with the city sewer facility.”
  • Mandatory utility hookupSewer (with conditions)

    A new home inside Imperial Beach city limits whose premises are within 200 feet of a public sewer

    • Applies only where a public sewer is within 200 feet of the place of origin of sewage on the premises.
    • Owner is responsible for the building sewer and lateral to the saddle connection on the public sewer or main (§ 13.04.040(b)).
    • Public water connection requirement was not verified (chapter 13 water provisions not opened).

    distance to public sewer: <= 200 feet

    “no person whose premises are so located that a public sewer is within 200 feet of the place of origin of sewage on the premises shall install any septic tank or use any means of disposing of such sewage other than through a connection with the city sewer facility.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Imperial Beach or San Diego County directly.

  • Building permit — New construction inside Imperial Beach city limits
  • Owner-builder exemption — Owner-builder construction inside Imperial Beach city limits
  • Inspections — Inspections for construction inside Imperial Beach city limits
  • Certificate of occupancy — Certificate of occupancy for new dwellings inside Imperial Beach city limits
  • Minimum dwelling size — Minimum floor area for dwelling units inside Imperial Beach city limits
14 more unanswered
  • Lot coverage
  • Tiny homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Well permit
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Building in a floodplain
  • Short-term rentals
  • Permit fees
  • Permit process

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 Imperial Beach publishes no rule on the point, not that none exists. San Diego County’s page lists the county offices to call.

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