Bolthole Index

Los Angeles County, California

Zoning, building permits and septic rules in Bellflower, California

Bellflower, California (Los Angeles County) requires a building permit from the city building official for construction, alteration or demolition inside city limits1. The city sets its own zoning under Title 17, including R-1 and A-E zones2. We could not confirm who handles septic permits inside the city; the city's sewer requirement applies to new subdivisions3.

At a glance

Building permit
Required from the city building official1
Zoning
City zoning under Title 17 (R-1, A-E and other zones)2
Building code
2025 California Building Code, with local amendments4
R-1 minimum lot
5,000 sq ft per dwelling unit5
R-1 minimum home size
950 sq ft of living area6
ADU size limit
1,200 sq ft maximum7
Septic
Not confirmed inside city limits; new subdivisions must connect to city sewer3

Who to call

Zoning

City of Bellflower Planning Department (planning, building and business license divisions)

Zoning, planning applications and building permits inside Bellflower city limits

(562) 804-1424

16600 Civic Center Drive, Bellflower, CA 90706

Septic permits

LA County Department of Public Health, Environmental Health – Onsite Wastewater Treatment Program

Septic system plan review for Los Angeles County; ask whether it applies to a Bellflower address

(626) 430-5380

5050 Commerce Drive, Baldwin Park, CA 91706

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 Bellflower means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Bellflower, CA?

Yes. Inside Bellflower city limits, anyone constructing, altering, repairing, relocating or demolishing a building or structure must obtain a permit from the city building official, and work done without one is a misdemeanor1. Bellflower has adopted the 2025 California Building Code by reference, with local amendments, and detached one- and two-family dwellings fall under the California Residential Code4.

California has a statewide owner-builder exemption from contractor licensing, but owner-builders still have to pull permits and pass inspections8. We could not confirm whether Bellflower adds its own owner-builder rules, or what its permit fees are; the Planning Department can tell you.

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

The City of Bellflower Planning Department coordinates the planning, building and business license divisions, so building permits and zoning both start at City Hall9. City Hall is at 16600 Civic Center Drive, and the phone number is (562) 804-14249. Do not send a Bellflower address to the Los Angeles County Planning counter: the county's Title 22 zoning applies only to unincorporated land10.

Does Bellflower have zoning, and what does it mean for lot size, home size and setbacks?

Bellflower runs its own zoning under Title 17, and the planning department enforces it29. Limits differ by zone.

In R-1 (Low Density Residential), the minimum lot area is 5,000 square feet per dwelling unit, with an exception for older lots of record5. A dwelling needs at least 950 square feet of living area, excluding porches and garages6. The front yard setback is at least 20 feet and the rear is at least 15 feet11. Height tops out at two stories or 30 feet, whichever is less12, and buildings may cover no more than 45% of the lot13.

In A-E (Agricultural Estate), the minimum lot area is 10,000 square feet14, and homes on parcels under 19,000 square feet need at least 1,500 square feet of floor area15.

How do septic permits work in Bellflower?

We could not confirm whether any parcel in Bellflower uses a septic system or who would permit one. The city requires every new subdivision and each lot within it to connect to the city's sewer system3. In unincorporated Los Angeles County, the county Department of Public Health approves septic plans under its Local Agency Management Program16; ask that office at (626) 430-5380 whether it would review a Bellflower address17. In a dense city, expect to connect to sewer.

Can you live in an RV or tiny home in Bellflower?

We could not confirm Bellflower's rules on living in an RV, tiny home or manufactured home; ask the Planning Department before buying. California treats a tiny home on wheels with 400 square feet or less as an RV, and one on a foundation must meet building standards18. Inside Bellflower, accessory dwelling units are allowed with limits, up to 1,200 square feet7, and ADU rentals must be for 30 days or longer19. Final occupancy for an ADU waits until the main home gets its final certificate of occupancy20.

Building a home in Bellflower: the steps, in order

  1. Confirm your parcel's zone with the Planning Department at (562) 804-14249.
  2. Check the zone's lot size, setback, height and coverage limits11.
  3. Apply for a building permit with the city building official before any work starts1.
  4. Build to the 2025 California Building Code as amended by the city4.
  5. Ask the Planning Department how inspections work; we could not confirm the city's inspection rules.
  6. For a subdivision, plan for sewer connection3.

What stays with Los Angeles County?

Land outside Bellflower's city limits follows different rules; see the Los Angeles County page for unincorporated land. Inside the city, septic and well questions may involve the county or the state, and we could not confirm which. Contact the county septic office17 and the Planning Department9 before you buy.

Watch-outs

  • We could not confirm Bellflower's building permit fees; the city says its fee schedule is set by City Council resolution, so ask the Planning Department for the current schedule1.
  • Zoning limits differ by district, so confirm your parcel's zone before relying on R-1 or A-E numbers2.
  • County zoning, the county's RV ban and county permit offices apply only to unincorporated land, not to Bellflower addresses10.

Sources

  1. Chapter 15.04 Building Code (Bellflower), quoted and re-checked
  2. Chapter 17.24 R-1 Low Density Residential Zone (Bellflower), quoted and re-checked
  3. Chapter 16.44 Subdivision Improvements (Bellflower), quoted and re-checked
  4. Chapter 15.04 Building Code (Bellflower), quoted and re-checked
  5. Chapter 17.24 R-1 Low Density Residential Zone (Bellflower), quoted and re-checked
  6. Chapter 17.24 R-1 Low Density Residential Zone (Bellflower), quoted and re-checked
  7. Chapter 17.17 Accessory Dwelling Units (Bellflower), quoted and re-checked
  8. Building Officials - Owner-Builder Overview, quoted and re-checked
  9. City of Bellflower Planning Department (planning, building and business license divisions) (bellflower.ca.gov)
  10. Los Angeles County Code Title 22: Planning and Zoning, quoted and re-checked
  11. Chapter 17.24 R-1 Low Density Residential Zone (Bellflower), quoted and re-checked
  12. Chapter 17.24 R-1 Low Density Residential Zone (Bellflower), quoted and re-checked
  13. Chapter 17.24 R-1 Low Density Residential Zone (Bellflower), quoted and re-checked
  14. Chapter 17.20 A-E Agricultural Estate Zone (Bellflower), quoted and re-checked
  15. Chapter 17.20 A-E Agricultural Estate Zone (Bellflower), quoted and re-checked
  16. Local Agency Management Program (LAMP), quoted and re-checked
  17. LA County Department of Public Health, Environmental Health – Onsite Wastewater Treatment Program (admin.publichealth.lacounty.gov)
  18. Information Bulletin 2016-01 (MH, FBH, SHL, MP/SOP, RT, OL) — Revised: Tiny Homes, quoted and re-checked
  19. Chapter 17.17 Accessory Dwelling Units (Bellflower), quoted and re-checked
  20. Chapter 17.17 Accessory Dwelling Units (Bellflower), quoted and re-checked

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 Bellflower

Bellflower’s own rules

  • Building permitRequired

    Construction, alteration, repair, relocation or demolition of a building or structure inside Bellflower city limits, issued by the city building official

    • Work performed without a permit is a misdemeanor and may be abated as a public nuisance.
    • Section 105.1.1 allows a time-based permit in lieu of individual permits for alterations to an approved system.
    “must obtain a valid permit from the building official. work performed without a permit is a misdemeanor.”
  • Building code adoptedAdopted (with conditions)

    New construction and alterations inside Bellflower city limits

    • Adopted with local amendments in Section 15.04.040 (administrative provisions) and Title 15 controls over conflicts.
    • Detached one- and two-family dwellings are governed by the California Residential Code under Section 15.60.010 per Section 101.4.10.

    adopted code edition: 2025 California Building Code

    “chapters 1 through 35, and appendix chapters b, f, g, h, i, j, and p of california code of regulations title 24, parts 1 and 2 (the 2025 california building code) are adopted by reference as the building code of the city of bellflower.”
  • Certificate of occupancyRequired

    Accessory dwelling units and junior ADUs inside Bellflower city limits only; general certificate-of-occupancy rule for other buildings was not located

    • Final CO for the ADU is withheld until the final CO for the primary dwelling issues.
    • Before any final ADU CO, the owner must record a covenant with the county recorder in a form approved by the city attorney.
    “the building official will not issue a final certificate of occupancy for an accessory dwelling unit ("adu") or junior accessory dwelling unit ("jadu") before the building official issues a final certificate of occupancy for the primary dwelling(s).”
  • Local zoningPresent (with conditions)

    Land inside Bellflower city limits; Bellflower city's own Title 17 Zoning ordinance applies (R-1, A-E and other zones).

    • Zoning districts and dimensional limits differ by zone; see district-specific claims.
    “the most restrictive of residential zones, composed chiefly of individual homes, together with required recreational, religious, educational and other community facilities”
  • Zoning districtsPublished (with conditions)

    Zoning districts of Bellflower city (Title 17), inside city limits

    “§ 17.24.010 intent and purpose. § 17.24.020 permitted uses.”
  • Minimum dwelling sizeSpecified

    Dwelling units on A-E Agricultural Estate parcels smaller than 19,000 square feet inside Bellflower city limits

    • Parcels of 19,000 square feet or larger have a separate minimum residential floor area in Section 17.20.120(b), not captured.

    minimum residential floor area: >= 1500 square feet (parcels of 19,000 square feet or larger have a different minimum)

    “a. parcels smaller than 19,000 square feet. the minimum residential floor area is 1,500 square feet.”
    One more reviewed finding on this topic
    • Specified — Dwelling units in the R-1 Low Density Residential zone inside Bellflower city limits
      “the minimum size of a dwelling unit to be used for residential purposes shall be not less than 95”
  • Minimum lot sizeSpecified

    Residential lots in the A-E Agricultural Estate zone inside Bellflower city limits

    • Dwelling-unit density is one unit per 9,900 square feet of net land area.
    • Lots of record under 10,000 sq ft may be developed with one residential dwelling unit.

    minimum lot area: >= 10000 square feet (lots of record under 10,000 square feet may be developed with one residential dwelling unit)

    “the minimum lot area is 10,000 square feet; provided however that when a lot has less than 10,000 square feet and is a lot of record, that lot may be developed with one residential dwelling unit.”
    One more reviewed finding on this topic
    • Specified — Single-family lots in the R-1 Low Density Residential zone inside Bellflower city limits
      “the minimum lot area shall be not less than 5,000 square feet per dwelling unit, provided however that when a lot has less area than 5,000 square feet and was recorded as a separate lot on or before september 3, 1957, said lot may be occupied by not more than one dwelling unit.”
  • SetbacksSpecified

    Single-family lots in the R-1 Low Density Residential zone inside Bellflower city limits (front and rear yard; side yard not captured)

    • Front yard driveways, walkways and parking areas may not exceed 40% of the required front yard area.
    • Through lots and alley-fronting lots have modified rear yard rules in Section 17.24.090.
    • Lots already built short of the front setback are deemed conforming under Chapter 17.92.

    front yard setback: >= 20 feet · rear yard setback: >= 15 feet (through lots may be reduced to 5 feet under conditions in Section 17.24.090)

    “a. every lot must have a front yard of not less than 20 feet from the front property line, and no building or structure or the enlargement thereof is permitted to encroach within the required front yard setback.”
    One more reviewed finding on this topic
    • Specified — Lots in the A-E Agricultural Estate zone inside Bellflower city limits (rear yard only captured)
      “a. lots less than 150 feet in depth must provide a rear yard setback of 15 feet or 15% of lot depth, whichever is greater. b. lots 150 feet or more in depth must provide a rear yard setback of 20% of the lot depth.”
  • Lot coverageSpecified

    Residential and accessory buildings on lots in the R-1 Low Density Residential zone inside Bellflower city limits

    • Coverage is computed from actual roof area, not including eaves.

    maximum lot coverage: <= 45 percent

    “the maximum lot coverage by all residential and accessory buildings shall not exceed 45%. said lot coverage shall be computed by utilizing the actual roof area, not including eaves, of all residential and accessory buildings.”
  • Building heightSpecified

    Buildings and structures in the R-1 Low Density Residential zone inside Bellflower city limits

    • Accessory buildings may not exceed one story or 18 feet, whichever is less.
    • Additional height may be permitted to match the roof pitch of the primary structure.

    maximum building height: <= 30 feet (or two stories, whichever is less)

    “a. no building or structure shall exceed two stories or 30 feet in height, whichever is less. b. no accessory building shall exceed one story in height or 18 feet, whichever is less. additional height may be permitted, if deemed necessary, in order to match the roof pitch of the primary structure.”
  • Accessory dwellingsLimited

    Accessory dwelling units (attached or detached) and junior ADUs inside Bellflower city limits

    • Junior ADU may not be sold separately and has size and attribute restrictions required by the code.
    • Owner occupancy and covenant requirements apply per Section 17.17.020.

    maximum gross area: <= 1200 square feet

    “an accessory dwelling unit, whether attached or detached, may not exceed 1,200 square feet in gross area.”
  • Mandatory utility hookupConditional

    New subdivisions and each new lot within a proposed subdivision inside Bellflower city limits; sewer connection for an existing or infill parcel was not established

    • Sewer facilities must be installed consistent with applicable master plans.
    • Where sewer facilities are installed in a public street, improvement plans are reviewed by the engineer and the county sanitation district.
    • Water facilities must be installed to serve each lot within a proposed subdivision per the requirements of the water service provider (Section 16.44).
    “all new subdivisions and each lot within a proposed subdivision are required to connect to the city's sewer system.”
  • Subdividing landRegulated (with conditions)

    Subdivisions of land inside Bellflower city limits under Title 16

    • Subdivision improvements, including sewer connection, are governed by Chapter 16.44.
    “all new subdivisions and each lot within a proposed subdivision are required to connect to the city's sewer system.”
  • Short-term rentalsLimited

    Rentals of accessory dwelling units inside Bellflower city limits; no general short-term-rental ordinance was located

    • Any ADU rental must be for a term of 30 days or longer.
    • An ADU may not be used in violation of the code.

    minimum rental term: >= 30 days

    “b. adu may not be used in violation of this code, and any rental of the adu must be for a term of 30 days or longer;”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Bellflower or Los Angeles County directly.

  • Owner-builder exemption — Owner-builder permit eligibility inside Bellflower city limits
  • Inspections — Building inspections for new homes inside Bellflower city limits
  • Living in an RV — Occupancy of recreational vehicles on private land inside Bellflower city limits
  • Camping on your land — Temporary camping on private land inside Bellflower city limits
  • Tiny homes — Tiny-home occupancy inside Bellflower city limits
9 more unanswered
  • Manufactured homes
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Agricultural exemption
  • Building in a floodplain
  • Permit fees

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 Bellflower publishes no rule on the point, not that none exists. Los Angeles County’s page lists the county offices to call.

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