Alpine County, California requires a separate building permit for a new home and most construction, and the county enforces zoning through Title 18.12 Building Safety checks plans and inspects permitted work, while Environmental Health permits and inspects residential septic installations.34
At a glance
- Building permit
- Required for a new home and most construction5
- Zoning
- County zoning applies; standards vary by district26
- Septic
- Environmental Health approval is required before building permits7
- RV living
- Private-site living or camping is limited to 16 days per calendar year unless Planning Commission approves an extension89
- Owner-builder
- Property owners may receive permits as owner-builders10
- Minimum home size
- A single-family unit must have at least 600 square feet of floor area and be at least 20 feet in its least dimension11
- Manufactured home
- One may be treated as a single-family residence in AG, AP, RE and RN zones with a certificate of compatibility12
- Water well
- A county permit is required for construction, deepening, repair or destruction13
Who to call
Building permits
Alpine County Building Safety Division
Building permits, plan checks, inspections and county building requirements
50 Diamond Valley Rd, Markleeville, CA 96120
Planning & zoning
Alpine County Planning Division
Zoning, development review, maps, special-event permits and code enforcement
50 Diamond Valley Rd, Markleeville, CA 96120
Septic permits
Alpine County Health Department, Environmental Health
Residential septic-system permitting and installation inspections
Health and Human Services, 75 A Diamond Valley Rd, Markleeville, CA 96120
Roads & driveways
Alpine County Engineering Department
County-road encroachment permits, including driveway access
50 Diamond Valley Rd, Markleeville, CA 96120
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 Alpine County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
Do you need a building permit in Alpine County, California?
Yes. Alpine County generally requires permits for improvements, replacements and repairs, and requires a separate permit before a building or structure is erected, enlarged, altered, repaired, moved, improved, removed, converted or demolished.51 The county identifies new attached or detached structures larger than 120 square feet, carports, garages, barns and grading of at least 50 cubic yards among work requiring permits and inspections; setbacks still apply when work is permit-exempt.1
Alpine County has adopted and enforces the California Building Standards Code in Title 24, including applicable local amendments for buildings in flood hazard areas.14 Building Safety reviews plans before permit issuance and periodically inspects permitted work.3 Property owners may receive permits as owner-builders, but they accept responsibility for the work and worker safety and must follow the county's residence, labor and resale conditions.1015 Owner-builder status does not eliminate building-permit or inspection requirements.53
Who issues Alpine County building permits, and how do you apply?
The Alpine County Building Safety Division accepts building applications through the county's online portal, reviews plans and periodically inspects permitted work.16173 The office is at 50 Diamond Valley Rd in Markleeville and can be reached at 530-694-2140.16
The applicant must provide the information relevant to the proposed project and route plans for required agency approvals before permit issuance.17 Alpine County publishes a plan-review deposit estimated at $1.00 per square foot up to $2,500.00, subject to the Building Official's determination.18 If part of the project can be occupied safely before all permitted work is complete, the building official may issue a temporary certificate of occupancy for up to 90 days; a written extension request must show circumstances beyond the applicant's control.19 Projects that need special inspections must file a final report before a Certificate of Use and Occupancy is issued, and enclosing space under an elevated building in a flood hazard area requires a recorded nonconversion agreement first.20
Does Alpine County have zoning?
Alpine County has countywide zoning under Title 18, with allowed uses, setbacks, parking requirements and height limits varying by district.2 The AG Agriculture Zone generally requires 20 acres, the NC Neighborhood Commercial Zone requires 10,000 square feet and the C Commercial Zone requires 5,000 square feet, although conditional uses can change those minimums.212223 In RN and RE zones, the county sets minimum parcel size site by site based on services, environmental conditions and the General Plan; a zoning suffix can state the result.2425 Where public water or sewer is unavailable, lot size must also comply with the county's onsite-wastewater program.26
The MHD Markleeville Historic District uses the underlying zone's lot-area rule unless its design guidelines are more restrictive.27 A CR Commercial Recreation combined zone generally inherits area and width standards from its paired zone, with the more restrictive rule controlling when the standards differ.28 A single-family unit must contain at least 600 square feet of floor area and measure at least 20 feet in its least dimension.11 In the AG Zone, standard front, side and rear yards are each 30 feet unless changed for a conditional use.29 The Planning Division handles zoning maps and code enforcement.30
How do septic permits work in Alpine County?
Alpine County Health Department Environmental Health permits residential septic systems and inspects their installation.4 For construction needing a new or replacement onsite wastewater treatment system, submit a permit application and scaled plot plan to Environmental Health; that approval must come before Building Safety can issue its permit.7
Site feasibility deserves early attention: only 0.4% of mapped county soils are rated without severe limitations for a conventional septic drain field.31 That soil statistic does not decide an individual parcel, but it makes a parcel-specific evaluation especially important. Alternative or supplemental systems require annual inspection, and service inspections trigger written reporting requirements.32 Cesspools, surface effluent discharge and systems dedicated to substantial RV holding-tank waste are not authorized.33
Can you live in an RV or tiny home in Alpine County?
Alpine County allows living, sleeping or camping in an RV on a private site owned by the occupant, or used with the owner's written consent, for no more than 16 days per calendar year unless the Planning Commission approves an occupancy-permit extension.34 An extension may require advance notice, sanitary-waste receipts, Environmental Health approval and a one-RV limit.35
A tiny home must qualify and be approved under an authorized housing category, but we could not confirm a more specific Alpine County tiny-home occupancy rule; ask Planning and Building Safety before relying on one as a dwelling.36 A single mobile or manufactured home may be treated as a single-family residence in the AG, AP, RE and RN zones after approval of a certificate of compatibility.12 Alpine County permits ADUs in listed districts, but an ADU cannot be a short-term rental and must be rented for more than 30 days.3738
Building a home in Alpine County: what are the steps?
- Ask Planning to confirm the parcel's zoning, allowed residential use, setbacks and height standard.3940
- Confirm legal access; driveway work in a county road right-of-way requires an encroachment permit from Engineering.41
- Resolve water and wastewater early. A new or replacement septic system needs Environmental Health approval before a building permit, and well construction requires a county permit.713
- Submit the building application and project information through the online portal, then obtain required agency sign-offs.17
- Complete plan review, pay the applicable fees and call Building Safety for inspections as work reaches each required phase.183
- Do not occupy unfinished permitted space without Building Official approval; a temporary certificate is limited to 90 days unless a written extension is granted.19
What should you check before buying land in Alpine County?
Start with buildability, not acreage alone. Only 8.2% of Alpine County land has a slope of 15% or less, and 0.4% of mapped soils avoid a severe conventional-drain-field limitation.4231 Ask Planning about zoning, Environmental Health about septic and well feasibility, and Engineering about driveway access.304344
If land is being split, a tentative parcel map covers a division into four or fewer parcels, while a tentative subdivision map is required for five or more; a final or parcel map cannot go to the recorder until required improvements are completed or secured by agreement.4546 A residential short-term rental requires a county license, and the East Slope overlay caps licenses outside commercial zones at 35.4748 Projects in the Bear Valley, Kirkwood and Markleeville service areas also need the applicable provider's water or sewer approval before a building permit.49
Watch-outs
- Permit-exempt work must still maintain Alpine County's applicable building setbacks.1
- Private-site RV occupancy or camping is limited to 16 days per calendar year unless the Planning Commission approves an occupancy-permit extension.89
- Environmental Health must approve a required new or replacement septic system before Building Safety can issue the building permit.7
- A driveway connection involving a county road right-of-way requires an Alpine County encroachment permit.41
Sources
- Building Safety Division, quoted and re-checked
- General Plan Housing Element Update Draft, quoted and re-checked
- Building Safety Division, quoted and re-checked
- Liquid Waste, quoted and re-checked
- Building Safety Division | Alpine County, CA, quoted and re-checked
- General Plan Housing Element Update Draft, quoted and re-checked
- Local Area Management Program (LAMP), quoted and re-checked
- Planning Commission Meeting: Camping on Private Property, quoted and re-checked
- Planning Commission Meeting: Camping on Private Property, quoted and re-checked
- Building Safety Division | Alpine County, CA, quoted and re-checked
- Alpine County Housing Element, quoted and re-checked
- Alpine County Housing Element, quoted and re-checked
- Well Permits, quoted and re-checked
- Alpine County Code, Chapter 16.08 Floodplain Management, quoted and re-checked
- Building Safety Division, quoted and re-checked
- Alpine County Building Safety Division (alpinecountyca.gov)
- Building Permit Information Guide, March 2022, quoted and re-checked
- Building Permit Information Guide, March 2022, quoted and re-checked
- County of Alpine Building Code Amendments, quoted and re-checked
- Statement of Special Inspections, 2022 CBC, quoted and re-checked
- Chapter 18.16 AG Agriculture Zone, quoted and re-checked
- Chapter 18.40 NC Neighborhood Commercial Zone, quoted and re-checked
- Chapter 18.44 C Commercial Zone, quoted and re-checked
- Chapter 18.36 RN Residential Neighborhood Zone, quoted and re-checked
- Chapter 18.32 RE Residential Estate Zone, quoted and re-checked
- Alpine County 6th Cycle Housing Element, zoning district lot sizes, quoted and re-checked
- Chapter 18.56 MHD Markleeville Historic District Combined Zone, quoted and re-checked
- Chapter 18.64 CR Commercial Recreation Combined Zone, quoted and re-checked
- Chapter 18.16 AG Agriculture Zone, quoted and re-checked
- Alpine County Planning Division (alpinecountyca.gov)
- Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
- alpinecountyca.gov, quoted and re-checked
- Local Area Management Program (LAMP), quoted and re-checked
- Planning Commission Camping on Private Property Discussion, quoted and re-checked
- Planning Commission Camping on Private Property Discussion, quoted and re-checked
- Information Bulletin 2016-01: Tiny Homes (California statewide rule), quoted and re-checked
- Accessory Dwelling Unit Information Sheet, quoted and re-checked
- Accessory Dwelling Unit Information Sheet, quoted and re-checked
- Alpine County 6th Cycle Housing Element, quoted and re-checked
- Chapter 18.68 General Requirements and Exceptions, quoted and re-checked
- Building Permit Information Guide, March 2022, quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Alpine County Health Department, Environmental Health (alpinecountyca.gov)
- Alpine County Engineering Department (alpinecountyca.gov)
- Planning and Development Information Guide, quoted and re-checked
- Alpine County Code Chapter 17.13, Construction of Improvements, quoted and re-checked
- Chapter 18.73 Residential Short-Term Rentals, quoted and re-checked
- Chapter 18.73 Residential Short-Term Rentals, quoted and re-checked
- Alpine County Building Permit Information Guide, quoted and re-checked
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.