Bolthole Index

Orange County, California

Building permits, zoning and land rules in Santa Ana, California

Santa Ana, California requires a city building permit before a regulated building or structure is built, enlarged, altered, repaired, moved, improved, converted or demolished1. The city also administers its own zoning, while Orange County Health Care Agency handles well permits in Santa Ana23. Buildings with plumbing fixtures must connect to public sewer when they are in a sewer district or an area served by public sewer; the authority for a new septic system inside city limits should be confirmed before purchase4.

At a glance

Building permit
Required for regulated buildings and structures1
Building code
Santa Ana adopted the 2025 California Residential Code5
Zoning
City zoning applies inside Santa Ana26
Sewer connection
Required where a building with plumbing is served by public sewer4
RV living
California generally limits RV occupancy unless local rules allow otherwise7
Tiny home
Must fit an approved housing classification and an approved location8
Owner-builder
A property owner may perform their own permitted work9
Water well
Orange County Health Care Agency permit required3

Who to call

Building permits

City of Santa Ana Building Safety Division

Building, plumbing, heating and cooling, and electrical permits; plan review and inspections inside Santa Ana

(714) 647-5800

20 Civic Center Plaza Ross Annex, M-20 Santa Ana, CA 92701

Online permits →

Planning & zoning

City of Santa Ana Planning Division

Zoning, planning applications and electronic plan review inside Santa Ana

(714) 647-5804

20 Civic Center Plaza Santa Ana, CA 92701

Online permits →

Well permits

Orange County Environmental Health Well Permitting

Well permits and well-ordinance questions for Santa Ana

714-433-6287

[email protected]

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

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Do you need a building permit in Santa Ana, California?

Yes. Santa Ana requires a separate permit before each regulated building or structure is erected, constructed, enlarged, altered, repaired, moved, improved, converted or demolished1. The City Building Safety Division issues building, plumbing, heating and cooling, and electrical permits, reviews plans and inspects the work covered by those permits10.

Santa Ana adopted the 2025 California Residential Code, based on the 2024 International Residential Code, with the city's supplements, amendments and adopted appendices5. A building, structure or business generally cannot be occupied without a valid certificate of occupancy, although permit-exempt work and specified occupancy groups have exceptions11. A property owner may pull a permit to perform their own work, while the city also recognizes licensed contractors and authorized contractor representatives9.

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

The City of Santa Ana Building Safety Division is the building department for property inside city limits10. Call (714) 647-5800 or visit the public counter at 20 Civic Center Plaza, Ross Annex, M-20, Santa Ana, CA 9270110. The division handles permit issuance, plan review and construction inspections10.

Santa Ana now accepts permit and plan-review applications through its Accela Citizen Access portal, where applicants can access permit records, pay fees, check application status and schedule building inspections10. For zoning and planning applications, contact the City Planning Division at (714) 647-580412. Orange County's Development Services counter serves unincorporated land, so it is not the building-permit counter for an address inside Santa Ana13.

Does Santa Ana have zoning, and what does it mean for setbacks?

Yes. Santa Ana divides land inside city limits into zoning districts under Chapter 41, including agricultural, residential, commercial, industrial and special districts26. The City Planning Division maintains Santa Ana's zoning documents, so confirm the parcel's district there before designing a house, accessory structure or change of use12.

Standards depend on the district. In the R1 single-family residence district, the front yard must match the prevailing block setback but cannot be less than 20 feet, and the rear yard is generally at least 20 feet; the cited rear-yard rule has an exception for permitted accessory dwelling units14. In the A1 general agricultural district, the minimum front yard is 25 feet15. Santa Ana also has rules for accessory dwelling units and junior accessory dwelling units16.

How do sewer and septic rules work inside Santa Ana?

Santa Ana requires every building or structure with plumbing fixtures to connect to public sewer when the property is within a sewer district or an area served by public sewer4. When public sewer is completed for a newly included property, connection is due within 90 days, and any cesspool or septic tank must be disconnected and filled when the connection is made4.

We could not confirm which local agency authorizes a new, replacement or repaired septic system inside Santa Ana city limits. California's onsite-wastewater policy allows county departments, city departments or independent districts to administer locally approved programs, so do not assume that Orange County's unincorporated-area septic desk covers a Santa Ana address17. Ask the Santa Ana Building Safety Division who must approve private sewage disposal before relying on a parcel that lacks public sewer10.

Can you live in an RV or tiny home in Santa Ana?

Do not assume that an RV can serve as a permanent dwelling on a Santa Ana lot. California treats RV occupancy as temporary and generally limits it to mobilehome parks or special occupancy parks unless a local ordinance allows another arrangement7. We could not confirm a Santa Ana rule that separately authorizes full-time RV living on private residential land, so ask the Planning Division about the specific parcel and proposed use12.

A structure marketed as a tiny home must qualify as an approved manufactured home, code-compliant site-built home, factory-built home, recreational vehicle, park trailer or camping cabin, and its location must be approved for that classification8. Santa Ana permits accessory dwelling units and junior accessory dwelling units under city standards and California law, which may offer a compliant path for a small dwelling16.

Building a home in Santa Ana: the steps, in order

  1. Ask the City Planning Division to confirm the parcel's zoning district and the district-specific use and setback rules212.
  1. Confirm public-sewer availability; a building with plumbing must connect where the property is served by public sewer4.
  1. If the project proposes a water well, apply through Orange County Environmental Health before construction; the agency says review may take at least 10 business days depending on complexity318.
  1. Submit the building and plan-review application to the City Building Safety Division through the online permit portal10.
  1. If acting as an owner-builder, identify yourself as the property owner performing your own work9.
  1. Schedule the inspections required for the permitted work and obtain the applicable final occupancy approval before moving in1011.

What stays with Orange County, and what should you check before buying in Santa Ana?

Orange County Environmental Health administers well permits in Santa Ana because Santa Ana is not among the listed cities that enforce their own well ordinances318. A well or exploratory boring application is reviewed before construction, and the county lists limited exemptions for specified shallow borings and other work3.

Building permits and zoning stay with the City of Santa Ana12. Before buying, use the City Planning Division to verify zoning and setbacks, and ask the Building Safety Division to confirm sewer service and the approval path for any proposed private sewage system1210. Orange County-level land statistics should not be treated as parcel facts inside the city; the parcel's utilities, zoning district and existing permit history are the practical checks that control the project.

Watch-outs

  • Santa Ana, not Orange County Development Services, issues building permits and administers zoning inside city limits12.
  • A building with plumbing must connect to public sewer where service is available, and an existing septic tank must be disconnected and filled when that connection is made4.
  • The agency responsible for approving a new or repaired septic system inside Santa Ana should be confirmed with the City Building Safety Division before purchase10.
  • R1 and A1 setbacks differ, so confirm the parcel's zoning district before applying a setback figure1415.

Sources

  1. Santa Ana Municipal Code § 8-94, Permits required (Santa Ana), quoted and re-checked
  2. Santa Ana Municipal Code § 41-184, Districts established (Santa Ana), quoted and re-checked
  3. Orange County Health Care Agency, Application for Well/Exploratory Boring Permit (Santa Ana), quoted and re-checked
  4. Santa Ana Municipal Code § 39-51, Mandatory connections (Santa Ana), quoted and re-checked
  5. Santa Ana Municipal Code § 8-2800, Adoption by reference (Santa Ana), quoted and re-checked
  6. Santa Ana Municipal Code § 41-184, Districts established (Santa Ana), quoted and re-checked
  7. hcd.ca.gov (California statewide rule), quoted and re-checked
  8. Information Bulletin 2016-01: Tiny Homes (California statewide rule), quoted and re-checked
  9. Santa Ana Municipal Code § 8-6, License requirements of contractors and subcontractors (Santa Ana), quoted and re-checked
  10. City of Santa Ana Building Safety Division (santa-ana.gov)
  11. Santa Ana Municipal Code § 8-94, Certificate of occupancy provisions (Santa Ana), quoted and re-checked
  12. City of Santa Ana Planning Division (santa-ana.gov)
  13. Building Permit Information (2026 county census)
  14. Santa Ana Municipal Code § 41-234, Front yard (Santa Ana), quoted and re-checked
  15. Santa Ana Municipal Code § 41-203, Front yard (Santa Ana), quoted and re-checked
  16. Santa Ana Municipal Code § 41-194, Accessory dwelling units—Purpose (Santa Ana), quoted and re-checked
  17. Water Quality Control Policy for Siting, Design, Operation and Maintenance of Onsite Wastewater Treatment Systems (OWTS Policy) (California statewide rule), quoted and re-checked
  18. Orange County Environmental Health Well Permitting (ochealthinfo.com)

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 Santa Ana

Santa Ana’s own rules

  • Building permitRequired

    Buildings and structures inside Santa Ana city limits regulated by the city building code.

    • Separate permits are required for each building or structure.
    • The section contains an exception that certificates of occupancy are not required for work exempt from permits under Section 105.2.
    “No building or structure regulated by this code shall be erected, constructed, enlarged, altered, repaired, moved, improved, or its occupancy changed, removed, converted, demolished or maintained unless a separate permit for each building or structure has first been obtained from the building official.”
  • Owner-builder exemptionAvailable (with conditions)

    A property owner performing permitted work inside Santa Ana city limits.

    • The owner must perform their own work; the ordinance also separately allows licensed contractors, authorized contractor representatives, and certain employees of the owner with workers' compensation insurance and a federal tax identification number.
    “No person shall be issued a permit to perform work requiring a permit under this Code, unless they are: (1) A licensed contractor; (2) An employee, agent or authorized representative of a licensed contractor; (3) A representative of an electronically subscribed service acting on behalf of a licensed contractor; or (4) The property owner performing their own work;”
  • Building code adoptedAdopted

    Residential construction inside Santa Ana city limits.

    • The city residential code includes subsequent supplements or amendments and specifically adopted appendices.

    edition: California Residential Code 2025 Edition (Based on the 2024 International Residential Code)

    “There is adopted by the city that certain code known as the California Residential Code, 2025 Edition, based on the 2024 International Residential Code as published by the International Code Council”
  • Certificate of occupancyRequired

    Occupancy of buildings, structures, and businesses inside Santa Ana city limits.

    • Certificates of occupancy are not required for work exempt from permits under Section 105.2.
    • A change of occupant generally requires a certificate, except Group R Divisions 2 and 3 and Group U occupancies.
    “No building or structure shall be occupied, nor shall a business operate without a valid Certificate of Occupancy. A business operating in a manner inconsistent with its Certificate of Occupancy is operating in violation of this Code provision.”
  • Local zoningPresent

    Land inside Santa Ana city limits; Santa Ana administers Chapter 41 zoning districts.

    “In order to carry out the purpose and provisions of this chapter, the city is divided into the following districts: A1 — General agricultural RE — Residential-estate R1 — Single-family residence R2 — Limited multiple-family residence R3 — Medium-density multiple-family residence R4 — Suburban apartment”
  • Zoning districtsPublished

    Official Santa Ana zoning districts inside city limits.

    • The code lists A1, RE, R1, R2, R3, R4, P, GC, C1, C1-MD, C2, C4, C5, CR, M1, M2, C-SM, O, TV, DT, UC, CDR, UN-2, UN-1, SP, SD, MO, and OZ districts.
    “In order to carry out the purpose and provisions of this chapter, the city is divided into the following districts: A1 — General agricultural RE — Residential-estate R1 — Single-family residence R2 — Limited multiple-family residence R3 — Medium-density multiple-family residence R4 — Suburban apartment”
  • SetbacksSpecified

    R1 single-family residence district inside Santa Ana city limits.

    • Front yard equals the prevailing block setback but cannot be less than 20 feet.
    • Rear yard is at least 20 feet; the rear-yard section does not apply to permitted ADUs.

    minimum front yard: >= 20 feet (Must equal the prevailing front-yard setback of the block if greater) · minimum rear yard: >= 20 feet (Does not apply to permitted accessory dwelling units)

    “The front yard shall be equal to the prevailing front yard setback of the block as described in subsection 41-603 (b), but not less than twenty (20) feet.”
    One more reviewed finding on this topic
  • Accessory dwellingsAllowed (with conditions)

    Accessory dwelling units and junior accessory dwelling units inside Santa Ana city limits, subject to Santa Ana Municipal Code § 41-194 and applicable California law.

    • The city code establishes regulations for ADUs and junior ADUs.
    • ADU-specific exceptions apply to some R1 rear-yard setback provisions.
    “The purpose of this section is to establish regulations for the development of accessory dwelling units and junior accessory dwelling units as defined in this section and in California Government Code sections 66310, et seq., or any successor statute.”
  • Mandatory utility hookupSewer (with conditions)

    Buildings or structures containing plumbing fixtures inside Santa Ana city limits when located within a sewer district or area served by a public sewer.

    • Connection is mandatory when the property is within a sewer district or area served by a public sewer.
    • When a property is newly included, connection must occur within 90 days after completion of the public sewer.
    • Cesspools or septic tanks must be disconnected and completely filled with good, sound earth when the sewer connection is made.

    connection deadline after public sewer completion: 90 days

    “All buildings or other structures which contain any plumbing fixtures and which are located within any sewer district or district serviced by a public sewer must be connected to a public sewer.”

Rules another office applies inside Santa Ana

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

  • Well permitRequired

    Water wells and exploratory borings located inside Santa Ana city limits, administered through the Orange County Health Care Agency process.

    • A separate application is required for multiple cities, addresses, or locations.
    • Hand-augered work, certain vadose-zone monitoring systems, dewatering or hillside-stabilization wells, and qualifying shallow soil borings are listed as permitting exemptions.
    • The application and required documents are reviewed within 10 business days.

    application review time: 10 business days

    “An applicant shall be assessed a late charge if a well permit is not obtained prior to the date construction commences.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Santa Ana or Orange County directly.

  • Inspections — Building work inside Santa Ana city limits.
  • Minimum dwelling size — Residential dwellings inside Santa Ana city limits.
  • Lot coverage — Residential and agricultural districts inside Santa Ana city limits.
  • Building height — Residential and agricultural districts inside Santa Ana city limits.
  • Tiny homes — Tiny-home occupancy on private land inside Santa Ana city limits.
5 more unanswered
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • 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 Santa Ana publishes no rule on the point, not that none exists. Orange County’s page lists the county offices to call.

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