Bolthole Index

Placer County, California

Building permits, zoning and septic rules in Auburn, California

Building permits are required inside Auburn, California city limits for new construction, additions, alterations, repairs, plumbing and electrical work, and the City of Auburn's own Building Division issues them12. The City also runs its own zoning districts, such as R-1 single-family3. Septic permits in Placer County come from county Environmental Health4; we could not confirm how that applies to lots inside the city.

At a glance

Building permit
Required inside Auburn city limits for new construction, additions, alterations and repairs; issued by the City's Building Division12
Zoning
City-run districts including R-1, R-2, R-3, AR and A-1; check the district with City planning staff56
R-1 lot size and height
Minimum lot size 5,000 sq ft and dwelling height limit of 30 ft in R-137
Accessory dwelling units
Second units permitted by right in R-1 and AR zones8
Manufactured homes
Allowed on a permanent foundation in districts permitting single-family homes5
Septic
Placer County Environmental Health runs septic permitting; status for lots inside city limits not confirmed4
RV and tiny-home living
Not confirmed for Auburn; California law limits RV living to parks unless a local ordinance allows it9
Short-term rentals
Allowed with an Administrative Permit and neighbor notice10

Who to call

Building permits

City of Auburn Building Division

Plan review, building permits and inspections inside Auburn city limits

530-823-4211

1225 Lincoln Way, Auburn, CA 95603

Online permits →

Zoning

City of Auburn Planning Department

Planning permits and general planning inquiries inside Auburn city limits; online planning applications

530-823-4211

1225 Lincoln Way, Auburn, CA 95603

Online permits →

Septic permits

Placer County Environmental Health — Septic Systems

Septic Construction Permits, soils testing and Septic Health Site Evaluations for Placer County

530-886-1870

11434 B Ave., Auburn, CA 95603

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

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Do you need a building permit in Auburn, California?

Yes. Inside Auburn city limits, building permits are required for new construction, additions, alterations and repairs to a building, and plumbing or electrical installations also trigger them1. Basic permits that do not need plan review, such as water heaters or reroofs, can go through the City's expedited process; a new house, addition or remodel goes through plan review2.

The City of Auburn handles this, not Placer County. The county's building rules cover only unincorporated land; for a parcel outside city limits, see the Placer County page. California's 2025 building standards apply to applications filed on or after January 1, 202611. We could not confirm which local code amendments or owner-builder rules Auburn applies, so ask the Building Division.

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

The City of Auburn Building Division handles plan review, issues building permits and performs inspections2. Call 530-823-4211 or visit City Hall at 1225 Lincoln Way, Auburn, CA 956032. Applications for projects requiring plan review can be filed online or in person through the City's self-service portal6.

Planning permits and zoning questions go to the City's Planning Department at the same City Hall number6. Septic is different: Placer County Environmental Health, not the City, runs the county septic program from 11434 B Ave. in Auburn12.

Does Auburn have zoning, and what does it allow?

Auburn sets its own zoning districts, including R-1, R-2, R-3, AR and A-15. In the R-1 single-family district, the minimum lot size is 5,000 square feet3 and dwellings are limited to 30 feet in height7. Dimensional rules differ by district, so confirm your parcel's district with City planning staff before you plan.

Second residential units are permitted by right in the R-1 and AR zones8. Manufactured homes are allowed on a permanent foundation in districts permitting single-family homes, and outside a mobile home park they must meet the residential standards for the R-1 and R-2 districts5. Short-term rentals need an Administrative Permit circulated to neighbors, who get a ten-day appeal period10.

How do septic permits work for a lot in Auburn?

Placer County Environmental Health is the county's septic authority and issues Septic Construction Permits412. Where public sewer is unavailable for a new home, a septic system is required, and soils testing is required if the parcel has no soils report13. Incomplete applications cannot be processed12.

We could not confirm whether septic permits or inspections apply to lots inside Auburn city limits, or the rules for sewer connection there. Ask the City Building Division and county Environmental Health which one governs your address before you buy.

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

We could not confirm Auburn's own rule on living in an RV, tiny home or camping on a lot. California law says RVs are not intended as permanent dwellings and, unless a local ordinance allows otherwise, generally may be occupied only in mobilehome parks or special occupancy parks9. A tiny home can be occupied if it is approved as a type such as a manufactured home, a California Residential Code home or an RV, and the location is approved for that type14.

Ask the Planning Department about your zoning district before buying a lot for either.

Building a home in Auburn: the steps, in order

  1. Ask Planning Department staff for your parcel's zoning district and its lot-size and height limits6.
  2. Ask Placer County Environmental Health whether septic or sewer applies to your lot12.
  3. Apply for planning permits online if your project needs them6.
  4. Submit your building permit application with plans to the Building Division2.
  5. Schedule inspections by phone; the City conducts inspections Monday through Thursday, none on Fridays6.

What stays with Placer County, and what to check before you buy

Septic and well work are county matters in Placer County: well permits require a C-57 licensed driller15, and septic goes through Environmental Health4. A driveway connecting to a state highway needs a Caltrans encroachment permit16. For land outside city limits, use the Placer County page; the county's rules do not apply inside Auburn.

County-level context: Placer County's effective property tax rate is 0.9%17.

Watch-outs

  • Planning application submittals are by appointment, so call before you drive in6.
  • We could not confirm whether Auburn requires a septic permit, allows private wells, or has a flood or driveway permit for lots inside city limits; ask the City Building Division and county Environmental Health12.
  • Short-term rentals inside Auburn need an Administrative Permit and a business license10.

Sources

  1. auburn.ca.gov (Auburn), quoted and re-checked
  2. City of Auburn Building Division (auburn.ca.gov)
  3. Auburn Housing Element 2021 (Auburn), quoted and re-checked
  4. Environmental Health, quoted and re-checked
  5. Auburn Housing Element 2021 (Auburn), quoted and re-checked
  6. City of Auburn Planning Department (auburn.ca.gov)
  7. Auburn Housing Element 2021 (Auburn), quoted and re-checked
  8. Auburn Housing Element 2021 (Auburn), quoted and re-checked
  9. hcd.ca.gov (California statewide rule), quoted and re-checked
  10. Short Term Rentals (Auburn), quoted and re-checked
  11. Approved Building Standards (California statewide rule), quoted and re-checked
  12. Placer County Environmental Health — Septic Systems (placer.ca.gov)
  13. Septic Systems, quoted and re-checked
  14. Information Bulletin 2016-01: Tiny Homes (California statewide rule), quoted and re-checked
  15. placer.ca.gov, quoted and re-checked
  16. Encroachment Permits | Caltrans (California statewide rule), quoted and re-checked
  17. 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 Auburn

Auburn’s own rules

  • Building permitRequired

    New construction, additions, alterations, repairs, plumbing installations, and electrical installations inside Auburn city limits.

    • The source separately identifies plan-review and basic permits; residential and commercial basic permits without plan review may be processed through the City's expedited process.
    “Building permits are required for new construction, additions, alterations, or repairs to a building. They are also triggered by plumbing or electrical installations.”
  • Manufactured homesAllowed (with conditions)

    Manufactured homes on a permanent foundation in Auburn districts permitting single-family residential uses, including R-1, R-2, R-3, AR, and A-1.

    • Manufactured homes outside a mobile home park must conform to all residential-use development standards for the R-1 and R-2 zoning districts.
    “Manufactured homes are permitted on a permanent foundation in districts permitting single-family residential uses (R-1, R-2, R-3, AR, and A-1). Manufactured homes located outside a mobile home park must conform to all residential use development standards for the R-1 and R-2 zoning district.”
  • Accessory dwellingsAllowed

    Second residential units/accessory dwelling units in Auburn's R-1 and AR zones.

    • The source states that second residential units are permitted by right in the R-1 and AR zones.
    “Second residential units are permitted by right in the R-1 and AR zone.”
  • Short-term rentalsLimited

    Short-term rentals inside Auburn city limits.

    • An Administrative Permit must be circulated to neighbors before renting.
    • Neighbors receive a ten-day appeal period.
    • If no objections are received, the Administrative Permit is approved subject to Auburn Municipal Code conditions.
    • If opposition is received, the applicant may elect to forward the request to the Planning Commission for an additional processing fee.
    • One on-site parking space is required for each guest room rented, in addition to existing residential parking.
    • All businesses operating within City Limits require a business license.

    neighbor appeal period: 10 days · on-site parking: 1 space per guest room (In addition to parking required for the existing residential unit)

    “Due to potential neighborhood impacts, an Administrative Permit is required to be circulated to your neighbors before renting your home. Neighbors are given a ten day appeal period in which they can object to the request.”

Rules another office applies inside Auburn

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

  • Minimum lot sizeSpecified

    R-1 Single-Family Residential District inside Auburn city limits.

    minimum lot size: >= 5000 sq ft

    “Minimum Lot Size (sq. ft.) 5,000 5,000 5,000”
  • Building heightSpecified

    R-1 Single-Family Residential District inside Auburn city limits.

    maximum dwelling height: <= 30 ft

    “Height Limit (Dwellings) 30 ft. 30 ft. 30 ft.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Auburn or Placer County directly.

  • Owner-builder exemption — Owner-builders undertaking construction inside Auburn city limits.
  • Building code adopted — Building-code adoption applicable inside Auburn city limits.
  • Inspections — Building inspections inside Auburn city limits.
  • Certificate of occupancy — Certificates of occupancy inside Auburn city limits.
  • Minimum dwelling size — Minimum dwelling size inside Auburn city limits.
12 more unanswered
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Driveway access
  • Building in a floodplain

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

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