Bolthole Index

San Bernardino County, California

Zoning, building permits and septic rules in Colton, California

Inside Colton city limits, the City of Colton's own Planning and Building and Safety divisions handle zoning and construction inspections, not San Bernardino County12. The county's building and zoning rules cover only unincorporated land3. We could not confirm who issues septic permits inside the city, so ask San Bernardino County Environmental Health Services4.

At a glance

Zoning
Colton's own zoning districts, codified in Title 18; check an address on the city's Property Viewer1
Building permits and inspections
City Building and Safety Division; inspections required before a Certificate of Occupancy25
R-1 lot and home size
7,200 sq ft minimum lot; 1,300 sq ft minimum dwelling67
R-1 setbacks
Front 25 ft, rear 20 ft, side 10% of lot width up to 15 ft8
Camping on public property
Prohibited unless the City designates the site9
Septic permits
Not confirmed inside city limits; ask County Environmental Health Services4
Flood hazard areas
City floodplain rules apply to development and RVs10

Who to call

Building permits

City of Colton Development Services - Building and Safety Division

Construction inspections inside Colton city limits, including the Building and Safety inspection before a Certificate of Occupancy

(909) 370-5079

659 North La Cadena Drive Colton, California 92324

Planning & zoning

City of Colton Planning Division

Zoning, the zoning map and Property Viewer, and development standards inside Colton city limits

909-370-5079

planning@coltonca.gov

659 N La Cadena Drive Colton, CA 92324

Septic permits

San Bernardino County Environmental Health Services - Land Use & Wastewater Program

Septic (onsite wastewater) system review and wells for San Bernardino County; whether it covers parcels inside Colton city limits is not confirmed

(800) 442-2283

385 N. Arrowhead Ave, 2nd Floor, San Bernardino, CA 92415-0160

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

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Does Colton have zoning, and what does it mean for lot size, setbacks and RVs?

Yes. Colton publishes its own zoning map and an interactive Property Viewer for address-level zoning checks, and the district standards are codified in Title 18 of the city code1. Rules differ by district, so look up the parcel first.

In the R-1 Low Density Residential Zone, Colton requires a 7,200 square foot minimum lot6 and a 1,300 square foot minimum dwelling7. R-1 setbacks are 25 feet in front, 20 feet in the rear and 10% of lot width, not exceeding 15 feet, on the sides8. Height tops out at 2.5 stories or 35 feet11.

In the R-2 Medium Density Residential Zone, the minimum lot is also 7,200 square feet12, lot coverage is capped at 40%13, and minimum dwelling size depends on bedrooms, from 600 square feet for an efficiency unit to 1,200 for three bedrooms14.

Colton prohibits camping on public property unless the City has designated the site9. We could not confirm Colton's rules for living in an RV or tiny home on private land, so ask the City Planning Division before you plan on it15.

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

Construction inside Colton goes through the City of Colton, not the county. The City's Building and Safety Division, part of the Development Services Department, runs construction inspections, and inspections from several departments are required before a Certificate of Occupancy is issued25. Reach it at16.

The county's published permit rules, including its threshold for detached buildings, apply to unincorporated San Bernardino County only, and the county notes that incorporated municipalities may administer their own permitting17. California's statewide building code applies to buildings subject to it, with the local building department deciding how the application date is set18.

Owner-builders: California's contractor-license exemption lets an owner build on their own property, but it concerns licensing and does not remove permit or inspection requirements19. We could not confirm Colton's own owner-builder process, though the City's Building and Safety page offers an owner-builder packet, so ask that office.

How do septic permits work inside Colton?

We could not confirm who issues septic permits for parcels inside Colton city limits. San Bernardino County's septic program is written for the unincorporated area, and its management plan says incorporated cities and towns are outside its scope20. Under state policy, cities and counties may run approved local septic programs21.

Before buying a parcel that is not on a sewer line, call San Bernardino County Environmental Health Services4 and the City's Building and Safety Division16 and ask which one reviews a septic system at that address. Wells need a county permit signed by a registered C-57 driller22; whether that county rule reaches a parcel inside the city is also unconfirmed.

We also could not confirm whether a new Colton home must connect to public water or sewer when it is available; ask the City.

Building a home in Colton: the steps, in order

  1. Look up the parcel's zone on the City's Property Viewer and zoning map1.
  2. Check the district standards for lot size, dwelling size, setbacks and height8.
  3. Check whether the parcel is in a mapped flood-hazard area, where development and RVs face extra permit, elevation and anchoring rules10.
  4. Ask Building and Safety about plan review, permits and the owner-builder packet16.
  5. Settle septic or sewer with the county and the city4.
  6. Schedule inspections from Building, Planning, Public Works, Water and Fire; Building, Planning, Public Works and Water inspections are done within 24 hours when contacted by 4:30 p.m. the preceding day2.
  7. Pass them all to receive the Certificate of Occupancy5.

What stays with San Bernardino County, and what to check before you buy in Colton?

Land outside Colton city limits follows the county's rules instead; see the San Bernardino County page for those. The county's Development Code governs zoning only in unincorporated areas3, so a county rule about RVs or camping on private land does not apply inside Colton.

County-level figures that still help: San Bernardino County's effective property tax rate is 0.7%23, and the typical home value is about $553,85524. Septic and well questions may sit with the county health office, so confirm the authority for the exact address4.

Watch-outs

  • Colton's R-1 and R-2 standards differ, so confirm a parcel's zone before relying on a lot size, setback or dwelling-size figure1.
  • San Bernardino County's rules for RVs, camping and permit thresholds apply to unincorporated land only, not inside Colton3.
  • We could not confirm septic permitting, short-term rental rules, driveway access rules or subdivision standards inside Colton; ask the Planning Division and Building and Safety1516.

Sources

  1. Planning Division (Colton), quoted and re-checked
  2. Construction Permit - Inspections (Colton), quoted and re-checked
  3. Zoning and Overlay Maps, quoted and re-checked
  4. San Bernardino County Environmental Health Services - Land Use & Wastewater Program (ehs.sbcounty.gov)
  5. Construction Permit - Inspections (Colton), quoted and re-checked
  6. R-1 Property Development Standards (Colton), quoted and re-checked
  7. R-1 Property Development Standards (Colton), quoted and re-checked
  8. R-1 Property Development Standards (Colton), quoted and re-checked
  9. Camping on public property (Colton), quoted and re-checked
  10. Standards for Recreational Vehicles (Colton), quoted and re-checked
  11. R-1 Property Development Standards (Colton), quoted and re-checked
  12. R-2 Property Development Standards (Colton), quoted and re-checked
  13. library.municode.com (Colton), quoted and re-checked
  14. R-2 Property Development Standards (Colton), quoted and re-checked
  15. City of Colton Planning Division (coltonca.gov)
  16. City of Colton Development Services - Building and Safety Division (coltonca.gov)
  17. Building and Safety Questions – Land Use Services, quoted and re-checked
  18. Approved Building Standards (California statewide rule), quoted and re-checked
  19. Building Officials - Owner-Builder Overview, quoted and re-checked
  20. San Bernardino County Local Agency Management Program, quoted and re-checked
  21. Water Quality Control Policy for Siting, Design, Operation and Maintenance of Onsite Wastewater Treatment Systems (OWTS Policy) (California statewide rule), quoted and re-checked
  22. Do I need a permit to construct or destroy a well?, quoted and re-checked
  23. Effective property tax rate: Bolthole Index county data
  24. Typical home value (Zillow): 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 Colton

Colton’s own rules

  • InspectionsRequired

    Construction requiring a Certificate of Occupancy inside Colton city limits.

    • Building and Safety, Planning, Public Works, Utilities-Water and Fire inspections are identified before certificate issuance.
    • Building, Planning, Public Works and Water inspections are performed within 24 hours when contacted by 4:30 p.m. the preceding day.
    “Prior to issuance of a Certificate of Occupancy, inspections will be required from the following departments. Please contact them directly for an inspection appointment.”
  • Certificate of occupancyRequired

    Construction projects inside Colton city limits for which a Certificate of Occupancy is issued.

    • Required departmental inspections precede issuance.
    “Prior to issuance of a Certificate of Occupancy, inspections will be required from the following departments. Please contact them directly for an inspection appointment.”
  • Zoning districtsPublished

    Zoning districts and zoning-map information inside Colton city limits.

    • The City provides a 2023 Zoning Map and an interactive Property Viewer for address-level zoning checks.
    • Specific district standards are codified in Title 18.
    “Maps General Plan - Land Use Map 2023 (PDF) Zoning Map 2023 (PDF) Check your zoning through Property Viewer - Interactive”
  • Camping on your landProhibited

    Camping, camp facilities or camp paraphernalia on public property inside Colton city limits.

    • Exception for public property designated by the City for camping or related purposes.
    • The ordinance also states it does not apply where otherwise mandated by applicable law.
    “It shall be unlawful for any person to camp, occupy camp facilities or use camp paraphernalia on any public property within the City, except as otherwise provided herein or mandated by applicable law.”
  • Building in a floodplainRequired

    Development, manufactured homes and recreational vehicles in mapped flood-hazard areas inside Colton city limits.

    • Requirements are zone-specific and include permits, elevation, anchoring and floodplain standards.
    • RV requirements apply in Zones A1-30, AR and AE; manufactured-home requirements apply in Zones A1-30, AH and AE.
    “All Recreational Vehicles placed on sites within Zones A1-30, AR, and AE on the community's Flood Insurance Rate Map will either: 1. Be on the site for fewer than one hundred eighty consecutive Days, and be fully licensed and ready for Highway Use. [...] or 2. Meet the Permit requirements of Sections 15.22.130 through 15.22.160 of this chapter and the Elevation and anchoring requirements for Manufactured Homes in Section 15.22.200 (A).”

Rules another office applies inside Colton

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

  • Minimum dwelling sizeSpecified

    Residential development in Colton's R-2 Medium Density Residential Zone.

    • Minimum size varies by bedroom count.

    3-bedroom minimum: >= 1200 square feet · 2-bedroom minimum: >= 1000 square feet · 1-bedroom minimum: >= 800 square feet · efficiency/bachelor minimum: >= 600 square feet

    “K. Minimum Dwelling Unit Size 3 Bedroom, Plus 1,200 square feet 2 Bedroom 1,000 square feet 1 Bedroom 800 square feet Efficiency/Bachelor 600 square feet”
    One more reviewed finding on this topic
    • Specified — Single-family residential development in Colton's R-1 Low Density Residential Zone.
      “minimum dwelling unit size 1,300 square feet”
  • Minimum lot sizeSpecified

    Single-family residential development in Colton's R-1 Zone.

    minimum lot size: >= 7200 square feet

    “A. Minimum Lot Size 7,200 square feet 1 1 Main Building2 Accessory Building”
    One more reviewed finding on this topic
    • Specified — Residential development in Colton's R-2 Zone.
      “A. Minimum Lot Size 7,200 square feet 1 1. Main Building2. Accessory Building”
  • SetbacksSpecified

    Single-family residential development in Colton's R-1 Zone.

    • Side setback is 10% of lot width, not exceeding 15 feet; corner-side setback is 5 feet; rear setback is 20 feet; alley and reversed-corner exceptions apply.

    front setback: >= 25 feet · rear setback: >= 20 feet (At least 25 feet from opposite side of alley where applicable) · side setback: 10% of lot width, not exceeding 15 feet (Reversed corner lot requires 10 feet)

    “minimum front yard setback 25 feet 1 e. minimum side yard setbacks 10% of lot width not exceeding 15 feet 1, 2, 3 f. minimum corner side yard setback 5 feet 1 g. minimum rear yard setback 20 feet 1, 2”
    One more reviewed finding on this topic
    • Specified — Residential development in Colton's R-2 Zone.
      “D. Minimum Front Yard Setback 25 feet 1 E. Minimum Side Yard Setbacks 10% of lot width not exceeding 15 feet 1, 2, 3 F. Minimum Corner Side Yard Setback 5 feet 1 G. Minimum Rear Yard Setback 20 feet 1, 2”
  • Lot coverageSpecified

    Primary structures in Colton's R-2 Zone.

    maximum lot coverage: <= 40 percent of lot area

    “I. Max. Lot Coverage 40% of lot area 1 J. Dwelling Units per Acre 8.1 —16 DU/AC”
  • Building heightSpecified

    Primary structures in Colton's R-1 Zone.

    • Hillside clustering may reduce the standard subject to the cited review process.

    maximum building height: 2.5 stories or 35 feet (Hillside clustering provision)

    “maximum building height 2.5 stories or 35 feet 1. may be reduced when clustering homes for hillside development, subject to discretionary review process.”
    One more reviewed finding on this topic
    • Specified — Primary structures in Colton's R-2 Zone.
      “L. Maximum Building Height 2.5 Stories or 35 feet 1. May be reduced when clustering homes, subject to discretionary process.”

Still unanswered

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

  • Owner-builder exemption — Owner-builder exemption for construction inside Colton city limits.
  • Tiny homes — Tiny-home occupancy on private or public land inside Colton city limits.
  • Septic permit — Septic or OWTS permits for land inside Colton city limits.
  • Septic inspection — Septic inspections for land inside Colton city limits.
  • Mandatory utility hookup — Whether a new home inside Colton city limits must connect to public water or sewer when available.
4 more unanswered
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Short-term rentals

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

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