Unincorporated Plumas County, California requires building permits and applies county zoning and land-use standards12. The Plumas County Building Department issues building permits and inspects the work, the Planning Department handles zoning, and Environmental Health oversees septic systems and wells3456. Private-land RV camping is temporary and zone-dependent7.
At a glance
- Building permit
- Required in unincorporated Plumas County; permitted work must pass county inspections89
- Zoning
- County zoning applies in unincorporated areas; lot size and setbacks depend on the district21011
- Septic permits
- Plumas County Environmental Health oversees onsite wastewater systems and sewage-disposal permits1213
- RV living
- Not year-round; private-land camping is zone-dependent and subject to time, sanitation and owner-consent limits7
- Tiny home
- A tiny home on wheels is treated as an RV; other tiny homes need an approved code-compliant classification and location1415
- Owner-builder
- A conditional contractor-license exemption is available, but the owner must complete the county acknowledgment before permit issuance1617
- Water well
- A county permit and a state-licensed, bonded drilling contractor are required18
Who to call
Building permits
Plumas County Building Department
Building permits, plan review and inspections
555 Main Street, Quincy, CA 95971
Zoning
Plumas County Planning Department
Parcel zoning, land-use and development requirements for unincorporated Plumas County
555 Main Street, Quincy, CA 95971
Septic permits
Plumas County Environmental Health
Septic and well permits, site review and inspections
270 County Hospital Road, Suite 127, Quincy, CA 95971
Roads & driveways
Plumas County Department of Public Works
Encroachment permits for drive approaches and other work in county-maintained road rights-of-way
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 Plumas 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.
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Do you need a building permit in Plumas County, California?
Yes. Unincorporated Plumas County requires building permits and has adopted the California building, electrical, mechanical, plumbing and fire codes1. Permit applications made in 2026 or later fall under the statewide 2025 California Building Standards Code19. Work performed under a Plumas County building permit must be inspected and approved by a county building inspector9. A Limited Density Rural Dwelling also needs a permit, approved plans, and Environmental Health approval of sewage disposal and potable water before issuance20. Plumas County publishes development-review and permit fees, but the total depends on the project and applicable reviews21. An owner-builder may qualify for a contractor-license exemption, but must sign the county declaration before the permit is issued16.
Who is the Plumas County building department, and how do you reach it?
The Plumas County Building Department provides permit review and inspection services at 555 Main Street in Quincy; call (530) 283-7011 before submitting plans3. A complete submission with required documents, engineering, signatures, and planning and zoning requirements averages 2–4 weeks, while corrections and workload can add time22. Planning is a separate review at the same address and phone number; the Plumas County Planning Department handles parcel zoning, land-use and development requirements4. Start with Planning when the project depends on allowed use, setbacks, lot area or a combining zone, then coordinate construction documents with Building2311. Ask Building for a project-specific fee estimate; the county publishes development-review and permit fees21.
Does Plumas County have zoning?
Plumas County zoning applies to unincorporated land; check the parcel's district and combining zones in the county GIS Map Portal224. Inside Portola, the city administers its own zoning, while Plumas County Environmental Health oversees septic systems countywide2512. Residential minimum lot area and lot coverage vary by district1026. In the districts covered by the county's residential table, front setbacks are 20 feet; side and rear setbacks are 5 feet per story for parcels under 1 acre and 30 feet for parcels over 1 acre, with a 35-foot height limit1127. Unincorporated Plumas County allows ADUs where dwellings are permitted, subject to building standards and sewage approval; complete applications on lots with an existing dwelling require a decision within 60 days28. A qualifying statewide-exemption ADU may be up to 800 square feet and 16 feet high with 4-foot side and rear setbacks29.
How do septic permits work in Plumas County?
Plumas County Environmental Health oversees onsite wastewater systems and holding tanks12. A county permit is required before a sewage-disposal system is installed, repaired, replaced or abandoned, and before qualifying construction or changes that require sewage disposal13. Once a sewage disposal permit is issued, the installation must be finished within one year, with a one-time extension available30. Plumas County Environmental Health schedules septic and well inspections; an installed septic system must be approved before backfilling, and engineered or alternative systems also need a registered professional’s inspection3132. A qualifying occupied building within 200 feet of an approved public sewer must connect when right-of-way is available and the sewer manager certifies capacity33. Off-grid sewage disposal is possible only with Environmental Health approval; cesspools and pit privies are unlawful, and holding vaults need special written permission34. Call Environmental Health at (530) 283-6355 or visit 270 County Hospital Road, Suite 127, in Quincy35. Only about 1.5% of county soils are rated “not limited” for a conventional drain field, so obtain a site evaluation before purchase; the soil rating does not mean septic is impossible36.
Can you live in an RV or tiny home on your land in Plumas County?
Private-land RV camping in unincorporated Plumas County is limited to 120 days per calendar year, with owner consent and compliance with county health rules; stays beyond 17 consecutive days require proper health and sanitation, such as well and septic hookups37. Camping is prohibited in Single-Family Residential, Multiple-Family Residential and the listed commercial districts, but allowed in districts including Suburban, Rural, General Agriculture and Timberland Production; confirm the exact parcel zoning with Planning before using an RV during construction384. The permitted RV count also depends on the dwelling units, additional quarters and guest house allowed by zoning, minus those already on the property37. Plumas County treats a tiny home on wheels as an RV subject to those camping rules14. A foundation-built tiny home requires a county building permit and plans regardless of size, and must meet current zoning and construction standards15.
Building a home in Plumas County: the steps, in order
- Ask the Planning Department to confirm zoning, permitted residential use, lot standards and combining zones before design begins426.
- Determine sewage disposal and water early: Environmental Health handles septic and well review, and only a state-licensed, bonded C-57 contractor may drill the well56.
- Prepare a complete code-compliant submission and call the Building Department before scheduling delivery of plans and construction documents1922.
- If acting as owner-builder, sign the county acknowledgment and declare the contractor-license exemption basis before permit issuance1716.
- Obtain a Public Works permit for work in a county right-of-way; residential permits outside Local Response Areas also require a Fire Safe Driveway permit reviewed by Engineering3940.
- Schedule and pass required inspections; a Limited Density Owner-Built Rural Dwelling receives a certificate of occupancy only after required inspections and approval941.
What should you check before buying land in Plumas County?
Start with parcel zoning, minimum lot area, setbacks, lot coverage and the Flood Plain Combining Zone; Plumas County regulates floodplain development for reasonable safety from flood hazards, but applicability must be checked parcel by parcel102642. Obtain a septic site evaluation: only about 1.5% of county soils are rated “not limited” for a conventional drain field, which does not mean septic is impossible36. Check the distance to public sewer because a qualifying occupied building within 200 feet must connect when right-of-way and certified capacity are available33. Confirm well siting and access before closing; a new well needs county review and a permit, while driveway requirements depend on the road and fire-response area64039. A proposed single-family subdivision needs Tentative Map Review, including Zoning Administrator approval; the county lists an estimated 12-month total processing time43.
Watch-outs
- Private-land RV camping is not year-round housing: it is capped at 120 days per calendar year, and stays beyond 17 consecutive days require proper health and sanitation44.
- A tiny home on wheels is an RV in Plumas County and cannot be lived in year-round15.
- We could not confirm a countywide minimum dwelling floor area or a general agricultural building exemption in unincorporated Plumas County; ask Planning about dwelling size and Building about the proposed agricultural structure43.
- Cesspools and pit privies are unlawful, and an off-grid sewage arrangement needs Environmental Health approval34.
- Plumas County’s Limited Density Owner-Built Rural Dwelling program requires a building permit and approved inspections for a certificate of occupancy, plus a recorded covenant restricting occupancy to the owner-builder and family for at least 3 years2045.
Sources
- Plumas County 2019–2024 Housing Element, quoted and re-checked
- Planning Department | Plumas County, CA, quoted and re-checked
- Plumas County Building Department (plumascounty.us)
- Plumas County Planning Department (plumascounty.us)
- Liquid Waste, quoted and re-checked
- Plumas County Well Manual, quoted and re-checked
- plumascounty.us, quoted and re-checked
- Exhibit A — Limited Density Owner-Built Rural Dwellings (2026 county census)
- Inspection Request, quoted and re-checked
- Plumas County 2019–2024 Housing Element, quoted and re-checked
- Plumas County 2019–2024 Housing Element, quoted and re-checked
- Liquid Waste, quoted and re-checked
- Local Agency Management Plan for Onsite Wastewater Treatment Systems, quoted and re-checked
- FAQs, quoted and re-checked
- Tiny Home Information Guide, quoted and re-checked
- Single Family Dwelling - New Construction Permit Application, quoted and re-checked
- Property Owner’s Package — Disclosures & Forms for Owner-Builders Applying for Construction Permits, quoted and re-checked
- Plumas County Well Manual, quoted and re-checked
- Approved Building Standards (California statewide rule), quoted and re-checked
- Exhibit A — Limited Density Owner-Built Rural Dwellings, quoted and re-checked
- Permits and Fees, quoted and re-checked
- Building Department | Plumas County, CA - Official Website, quoted and re-checked
- Planning Department | Plumas County, CA, quoted and re-checked
- Planning Department | Plumas County, CA - Official Website, quoted and re-checked
- Portola: City of Portola 6th Cycle Housing Element Update (Plumas County), quoted and re-checked
- Plumas County 2019–2024 Housing Element, quoted and re-checked
- Plumas County 2019–2024 Housing Element, quoted and re-checked
- Ordinance No. 2024-1154, quoted and re-checked
- Ordinance No. 2024-1154, quoted and re-checked
- Liquid Waste, quoted and re-checked
- plumascounty.us, quoted and re-checked
- Inspection FAQs, quoted and re-checked
- plumascounty.us, quoted and re-checked
- Local Agency Management Plan for Onsite Wastewater Treatment Systems, quoted and re-checked
- Plumas County Environmental Health (plumascounty.us)
- 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
- plumascounty.us, quoted and re-checked
- plumascounty.us, quoted and re-checked
- Plumas County Department of Public Works (plumascounty.us)
- Fire Safe Driveways | Plumas County, CA - Official Website, quoted and re-checked
- Exhibit A — Limited Density Owner-Built Rural Dwellings, quoted and re-checked
- Planning Department, quoted and re-checked
- Plumas County 2019–2024 Housing Element, quoted and re-checked
- plumascounty.us, quoted and re-checked
- Limited Density Owner-Built Rural Dwellings Ordinance, 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.