Bolthole Index

Los Angeles County, California

Zoning, building permits and septic rules in Rolling Hills Estates, California

Rolling Hills Estates, California has its own zoning code, Title 17 of the city code1, and its own building permit process run from city hall with contract staff from Willdan2. The city adopts the Los Angeles County building codes by reference3. Septic questions go to the county health department's onsite wastewater program, not the city4. Los Angeles County's rules apply only outside city limits.

At a glance

Zoning
Yes, city zoning in Title 17 of the city code1
Building permits
City process, with building and safety services from Willdan2
Building codes
Los Angeles County codes adopted by reference; city code prevails on conflicts3
Septic
Plans reviewed by the county health department's onsite wastewater program4
RV living
No residing in over-sized vehicles on residential lots5
Manufactured homes
Allowed if no more than 10 years old at permit application6
Accessory dwellings
Allowed in designated zones under Chapter 17.567
Flood zone
Entire city mapped Zone X8

Who to call

Building permits

Rolling Hills Estates Building & Safety Division

Building permit applications, plan check and inspection scheduling inside Rolling Hills Estates; staffed by contractor Willdan

(310) 377-1577

planning@rollinghillsestates.gov

4045 Palos Verdes Drive North, Rolling Hills Estates, CA 90274

Zoning

Rolling Hills Estates Planning & Community Development

Zoning questions and planning review inside Rolling Hills Estates; appointments are recommended

(310) 377-1577

planning@rollinghillsestates.gov

4045 Palos Verdes Drive North Rolling Hills Estates California, 90274

Septic permits

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

Review and approval of septic system plans in unincorporated Los Angeles County and designated cities

(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 16, 2026.

Off-grid gear

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

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Does Rolling Hills Estates have zoning, and what does it mean for lot size and home size?

Yes. Rolling Hills Estates zones land under Title 17 of the city code, and the permitted-use list says the listed uses are the only uses allowed in each district1.

Lot and home minimums depend on the district:

  • R-A-E (one-acre residential): a one-acre minimum lot, at least 100 feet wide and 200 feet deep9, and a main building of at least 2,000 square feet10.
  • R-A-20: a 20,000-square-foot minimum lot, at least 85 feet wide and 150 feet deep11, and a main building of at least 1,600 square feet12.
  • R-A-10: a 10,000-square-foot minimum lot, at least 65 feet wide and 110 feet deep13, and a main building of at least 1,200 square feet14.

Find a parcel's district before you price it. We could not confirm lot coverage, height or setbacks, so ask Planning & Community Development15.

Do you need a building permit in Rolling Hills Estates, and who issues it?

Building permits inside Rolling Hills Estates come from the city, not Los Angeles County Public Works. The city states that it is a contract city that uses Willdan for building and safety services2. Los Angeles County's building permit rule covers only unincorporated land16.

Inside the city, the code section on county building codes says the county building, residential and green building codes are adopted by reference, and the city's own municipal code prevails if the two conflict3. We did not find the city code sentence that sets out when a permit is required, so assume any structural work needs one and confirm with the Building & Safety Division at (310) 377-1577, ext. 1052.

Owner-builders: California exempts owners from contractor licensing, but owner-builders still obtain building permits and pass inspections17.

How do septic permits work in Rolling Hills Estates?

Septic is not decided by the city. In Los Angeles County, the Department of Public Health's Onsite Wastewater Treatment Program reviews septic plans for unincorporated areas and designated cities4. We could not confirm whether a given Rolling Hills Estates address falls under that program or is expected to connect to sewer, so call (626) 430-5380 before relying on a septic system4.

The county rule for unincorporated land bars new septic permits when a public sewer lies within 200 feet of the building18. That is a county rule for unincorporated land, not a confirmed city rule. Wells are also not covered in the city's code that we reviewed; California requires well permits from local environmental health agencies or water districts19.

Can you live in an RV, tiny home or manufactured home in Rolling Hills Estates?

RVs: no, not as a home. The city code bars anyone from residing in an over-sized vehicle stored in a side or rear yard, and such vehicles are not allowed in front yards at all except under limited exceptions that never cover residing5. Statewide, RVs generally may be occupied only in mobilehome parks or special occupancy parks unless a local ordinance allows more20.

Manufactured homes: allowed as one-family dwellings in residential districts if no more than 10 years separate manufacture from the permit application6.

Tiny homes: we found no city rule. California treats a tiny home as legal only if it meets one of the recognized structure types, such as a building-code home or an RV21. Ask Planning & Community Development before buying.

Can you build an accessory dwelling unit in Rolling Hills Estates?

Yes. Rolling Hills Estates permits accessory dwelling units in designated zones, subject to standards in Chapter 17.56 of its code7. We did not review those standards, including size and setbacks, so confirm them with Planning & Community Development at (310) 377-1577 before drawing plans15. State law requires ADU permit applications to be considered ministerially, without discretionary review or a hearing22.

Building a home in Rolling Hills Estates: the steps, in order

  1. Confirm the parcel's zoning district and its minimum lot and home size under Title 171.
  2. Call Planning & Community Development at (310) 377-1577 to schedule an appointment, which the city strongly recommends15.
  3. Ask the county's Onsite Wastewater Treatment Program whether sewer or septic applies to the address4.
  4. Email your application and plans to planning@rollinghillsestates.gov for planning review, then the Building & Safety Division, staffed by Willdan, handles plan check2.
  5. Pay fees to the city once the permit fees are confirmed, then request inspections through the Building & Safety Division2.

What stays with Los Angeles County, and what to check before you buy in Rolling Hills Estates?

The entire city is mapped in flood Zone X, outside the 100-year floodplain8. Los Angeles County's zoning and its short-term rental, driveway and RV rules apply only to unincorporated land23; for land outside city limits see the Los Angeles County page.

County figures: the typical home value in Los Angeles County is about $888,42624 and its effective property tax rate is 0.7%25. These are county-level numbers, not Rolling Hills Estates figures.

Watch-outs

  • Do not use the Los Angeles County Planning or Public Works counters for a Rolling Hills Estates address; the county's zoning and building permit rules cover only unincorporated land23.
  • We could not confirm the city's rules on lot coverage, building height, driveways, short-term rentals, tiny homes or private wells; ask Planning & Community Development at (310) 377-157715.
  • Septic and sewer: confirm with the county Onsite Wastewater Treatment Program whether your address may use a septic system at all4.

Sources

  1. RHE Code 17.06.020 Permitted uses (Rolling Hills Estates), quoted and re-checked
  2. Rolling Hills Estates Building & Safety Division (rollinghillsestates.gov)
  3. RHE Code 15.04.010 County building codes adopted by reference (Rolling Hills Estates), quoted and re-checked
  4. LA County Department of Public Health, Environmental Health – Onsite Wastewater Treatment Program (admin.publichealth.lacounty.gov)
  5. RHE Code 17.06.440 Off-street parking requirements (residential districts) (Rolling Hills Estates), quoted and re-checked
  6. RHE Code 17.06.020 Permitted uses (Rolling Hills Estates), quoted and re-checked
  7. RHE Code 17.56.010 ADU Intent (Rolling Hills Estates), quoted and re-checked
  8. RHE Code 15.28.100 Flood damage prevention definitions (Rolling Hills Estates), quoted and re-checked
  9. library.municode.com (Rolling Hills Estates), quoted and re-checked
  10. RHE Code 17.08.030 R-A-E property development standards (Rolling Hills Estates), quoted and re-checked
  11. library.municode.com (Rolling Hills Estates), quoted and re-checked
  12. RHE Code 17.10.030 R-A-20 property development standards (Rolling Hills Estates), quoted and re-checked
  13. library.municode.com (Rolling Hills Estates), quoted and re-checked
  14. RHE Code 17.14.030 R-A-10 property development standards (Rolling Hills Estates), quoted and re-checked
  15. Rolling Hills Estates Planning & Community Development (rollinghillsestates.gov)
  16. Building and Safety - LA County Public Works Permits, quoted and re-checked
  17. Building Officials - Owner-Builder Overview, quoted and re-checked
  18. New Ordinance Adopted - Local Agency Management Program, quoted and re-checked
  19. Well Standards (California statewide rule), quoted and re-checked
  20. hcd.ca.gov (California statewide rule), quoted and re-checked
  21. Information Bulletin 2016-01: Tiny Homes (California statewide rule), quoted and re-checked
  22. Accessory Dwelling Unit Handbook March 2026 (California statewide rule), quoted and re-checked
  23. Los Angeles County Code Title 22: Planning and Zoning, quoted and re-checked
  24. Typical home value (Zillow): Bolthole Index county data
  25. Effective property tax rate: Bolthole Index county data

Written October 16, 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 Rolling Hills Estates

Rolling Hills Estates’s own rules

  • Building code adoptedAdopted

    Building, residential and green building codes inside Rolling Hills Estates city

    • Adopted by reference as amended from time to time, except as amended by chapter 15.04.
    • City municipal code prevails over conflicting county code provisions.
    “If any provision of the county building code, residential code or green building standards code conflicts with any provision of the city's municipal code, the provisions of the municipal code will prevail.”
  • Local zoningPresent

    Land inside Rolling Hills Estates city

    • Zoning is codified in Title 17 of the city code.
    “The following uses are the only uses permitted in the districts, subject to the property development standards in Sections 17.06.060 through 17.06.330”
  • Minimum dwelling sizeSpecified

    R-A-10 district inside Rolling Hills Estates city

    minimum area of main building: >= 1200 sq ft

    “Main buildings erected in the R-A-10 district shall have a total minimum area of one thousand, two hundred square feet.”
    2 more reviewed findings on this topic
  • Minimum lot sizeSpecified

    R-A-10 district inside Rolling Hills Estates city

    • Minimum lot width 65 ft and depth 110 ft.

    minimum lot area: >= 10000 sq ft · minimum lot width: >= 65 ft · minimum lot depth: >= 110 ft

    “R-A-10 district lots shall have a minimum required lot width of sixty-five feet and a minimum required lot depth of one hundred ten feet.”
    2 more reviewed findings on this topic
    • Specified — R-A-E district inside Rolling Hills Estates city
      “R-A-E district lots shall have a minimum required lot width of one hundred feet, and a minimum required lot depth of two hundred feet.”
    • Specified — R-A-20 district inside Rolling Hills Estates city
      “R-A-20 district lots shall have a minimum required lot width of eighty-five feet and a minimum required lot depth of one hundred fifty feet.”
  • Living in an RVLimited

    Over-sized vehicles (over 22 ft long, 7 ft high or 8 ft wide), including RVs, on residential lots inside Rolling Hills Estates city

    • No residing in over-sized vehicles stored in side or rear yards or during loading/unloading.
    • Not allowed in front yards or yards contiguous to a street except by medical-hardship variance (never for residing) or 48-hour loading/unloading.
    • Side/rear yard storage requires 10 ft setback, max two vehicles, DMV registration, city registration ($30 annually unless superseded).

    loading/unloading duration limit: <= 48 hours

    “No person(s) shall reside within said over-sized vehicle(s) while stored in any side or rear yard.”
  • Manufactured homesLimited

    Manufactured homes as one-family dwellings in residential districts inside Rolling Hills Estates city

    • No more than ten years between date of manufacture and application for a permit to install.
    • Must comply with the National Manufactured Housing Construction and Safety Act of 1974 standards (17.02.405).

    maximum age of manufactured home at permit application: <= 10 years

    “This includes a manufactured home, provided that no more than ten years have elapsed between the date of manufacture of the manufactured home and the date of the application for a permit to install the manufactured home in the applicable zone;”
  • Accessory dwellingsAllowed (with conditions)

    Accessory dwelling units inside Rolling Hills Estates city

    • Permitted in designated zones subject to standards in Chapter 17.56 (amended in entirety by Ord. 752, adopted August 26, 2025); specific standards not reviewed.
    “It is the intent of this chapter to permit ADUs, in conformance with state law, in designated zones subject to standards that will ensure the units contribute to a suitable living environment”
  • Building in a floodplainLimited

    Development inside Rolling Hills Estates city under Chapter 15.28 Flood Damage Prevention

    • Effective FIRM dated April 21, 2021 places the entire city in Zone X (non 100-year floodplain); operative permit provisions of Chapter 15.28 not reviewed.
    “The effective FIRM dated April 21, 2021 identifies the entire jurisdictional boundaries of the city as Zone "X"”

Still unanswered

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

  • Building permit — Building permits inside Rolling Hills Estates city
  • Owner-builder exemption — Owner-builder rules inside Rolling Hills Estates city
  • Inspections — Building inspections inside Rolling Hills Estates city
  • Certificate of occupancy — Certificates of occupancy inside Rolling Hills Estates city
  • Lot coverage — Residential lot coverage inside Rolling Hills Estates city
15 more unanswered
  • Building height
  • Camping on your land
  • Tiny homes
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • 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 Rolling Hills Estates 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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