Off-Grid Living in Plumas County, California

I spent considerable time reviewing Plumas County's zoning codes, building requirements, and environmental health standards to understand what off-grid living actually looks like here. The verdict is mixed: the county allows many of the basics (site-built tiny homes, private wells, temporary RV stays), but leaves critical gaps (no published rules on greywater or rainwater, unclear authority on off-grid electricity) that require direct local confirmation before you build or invest.

The Zoning Reality: Where You Can Build Depends on Your Zone

Plumas County's northeastern Sierra Nevada location hosts a diverse landscape, and the zoning reflects that. The county maintains countywide designations spanning residential zones (2-R through 7-R, each with different densities), agricultural, forest, and mining classifications. This is important: minimum lot sizes are not uniform. A 2-acre parcel might be permitted in one zone but not in another. I found no countywide blanket minimum; instead, each zone has its own floor. Your first step is to contact the Plumas County Planning Department and have them confirm your specific parcel's zone and the corresponding minimum lot size. You can also check your property address on the county's municode or planning map online. This single step will tell you whether your land can legally host a dwelling at all.

Dwelling Options: Site-Built Yes, RV-Based Mostly No

This is where I found the most practical detail. Site-built tiny homes on a permanent foundation are permitted, provided you obtain a county building permit and submit plans for review. If you are considering a small, conventionally framed house - even a small one - this pathway is open. You will need to meet Plumas County's building code standards (see below), but the zoning verdict is clear: it is allowed.

Tiny homes on wheels and RVs are not permitted as permanent residences. This is a hard line. You cannot move an RV onto your land and live in it full-time legally.

However, there is flexibility in temporary use. You can camp in an RV for up to 120 days per year without a permit. Also, if you are using an RV temporarily for construction purposes (say, on-site housing while you build your actual home) or other temporary needs, the county may allow up to 18 months with a permit. If you are considering a phased approach - living in an RV while you construct your home - contact the Plumas County Building Department to understand the permit timeline and any conditions. Ask specifically whether the 18-month window is firm and whether it begins when you place the RV or when construction formally starts.

Building Permits and Title 24 Compliance: Non-Negotiable

All dwellings require a county building permit. Plumas County administers California's Title 24 Building Standards Code locally, and I found no county-specific requirements that exceed the state baseline. This means your build must meet:

• Structural standards (foundation, framing, lateral bracing)
• Sanitation and plumbing code compliance
• Energy efficiency requirements (relevant for off-grid builds; solar and insulation specs matter)
• Fire and life safety (egress, smoke alarms, etc.)

The application process requires submission of plans - floor plans, elevations, electrical, plumbing, and often a PG&E service application (discussed below under "Utilities"). Plan on 4-8 weeks for initial review, depending on complexity. If your design uses unconventional materials or systems, expect pushback or requests for additional detail. Off-grid systems like solar PV arrays, battery banks, and greywater systems may trigger additional scrutiny if they are not already addressed in building code.

Septic Systems: Engineered Design May Be Required

Plumas County's Environmental Health Department reviews all septic system designs, and their standards are relatively detailed. Here is what I confirmed:

Percolation testing is mandatory. Your Environmental Health office will conduct or approve a percolation test on your site. If your soil percolates slower than 5 minutes per inch (very slow, poor draining) or faster than 60 minutes per inch (very fast, sandy), an engineered design is required. Standard system designs are acceptable only in the middle range.

The county publishes a detailed Sewage Disposal System Install Manual (updated as recently as January 2025), which specifies everything from pipe sizing to setback distances. I recommend requesting a copy from Environmental Health before you design or install anything.

Composting toilets are not explicitly addressed in the published rules I found. This is a gap. Some counties permit composting toilets as a supplement to a conventional septic system (to reduce flows); others prohibit them outright or treat them as an alternative only if they meet very specific criteria. Since Plumas County does not publish a clear stance, you must confirm directly with Environmental Health whether a composting toilet is acceptable and under what conditions. Ask whether it can be your sole sanitation system or whether a backup septic system is still required.

This uncertainty is common in California. The state's Onsite Wastewater Treatment Systems policy generally treats composting toilets as supplementary to a conventional system, not a replacement. Plumas County may follow that line. Do not assume composting toilets are permitted until you have written confirmation.

Greywater and Rainwater: Published Rules Are Missing - Confirm Locally

This is the biggest gap. Neither Plumas County publishes specific rules on greywater reuse nor rainwater harvesting. I reviewed the county code and Environmental Health materials and found no explicit language. This is a problem because greywater and rainwater are often essential to off-grid water management.

Under California law statewide, greywater is permitted. Specifically: - Laundry-to-landscape systems in single-family homes are allowed without a county permit if they meet 13 specific guidelines (no pooling, no potable contact, etc.). This is your simplest legal option. - All other greywater systems (kitchen sink, shower capture, etc.) require a county permit.

Under California law statewide, rainwater harvesting is legal. Specifically: - Rooftop rainwater collection in cisterns up to 360 gallons for outdoor, non-potable use requires no permit or water-rights approval. - Potable rainwater systems (filtering, storing, and drinking harvested rain) require a permit and may require water-quality testing.

But here is the key: Plumas County's Environmental Health and Building Department may have their own conditions or restrictions that are not published. They may require permits for systems the state allows without them, or they may prohibit systems the state permits. I cannot tell from the available materials.

You must contact both the Building Department and Environmental Health with specific questions: - "Can I install a laundry-to-landscape greywater system without a permit?" - "Do I need a permit for a 250-gallon rainwater cistern for outdoor (non-potable) use?" - "If I want to use rainwater for drinking, what testing and permitting is required?"

Get written answers. Email is often more reliable than phone. This step is non-negotiable if water independence is part of your plan.

Private Wells: Permitted, But with Depth and Location Rules

Wells are permitted and actually one of the clearer off-grid elements here. Plumas County Environmental Health issues well permits, and wells must meet the following:

• Minimum depth of 50 feet. Shallow wells are not permitted, period.
• Compliance with recorded subdivision maps where applicable. If your parcel is part of a recorded subdivision, the subdivision map may designate specific well locations. If your intended well site conflicts with that designation, you may be denied. You should confirm your parcel's subdivision status with the county Planning Department or County Recorder before you choose a well location.
• Licensed contractor. Wells must be drilled by a California-licensed well driller; this is a state requirement, not county-specific.

Also, water-rights considerations apply. California water law is complex, and water rights - the legal right to use water - may or may not transfer with your land purchase. Some parcels in Plumas County may have adjudicated water rights; others may not. If you are considering off-grid well-based water supply, ask the county whether water rights come with your parcel or whether you need to verify them separately with the State Water Resources Control Board.

The Environmental Health office can advise on well permitting; the county Assessor's office or a title company can clarify water rights.

Electricity: A Red Flag on the Horizon

This is the area where I found the most ambiguity and caution necessary. State law explicitly permits off-grid electricity systems (solar, wind, battery storage). There is no statewide prohibition, and California has been moving toward greater off-grid adoption for years.

However, Plumas County's building permit process includes a requirement for a PG&E (Pacific Gas & Electric) service application. This was the phrase that caught my eye in the county's building permit guidance. A utility service application signals that the county may expect - or at least assume - grid connection. This is not an outright ban on off-grid electricity, but it raises a question: Does the county require grid connection if you can be served, or will it approve off-grid electricity as an alternative?

I could not find a published county policy that explicitly answers this. The Building Department may have guidance on file, or the decision may be made case-by-case. This matters: if the county requires grid connection as a condition of your permit, you cannot build off-grid here legally.

You must contact the Plumas County Building Department directly and ask: - "Can I be approved for a building permit without requesting PG&E service if I am using solar + battery storage for electricity?" - "Under what conditions, if any, will you approve off-grid electricity systems?" - "Is grid connection a requirement or an option?"

Ask this early, before you commit to a site or design. If the department's answer is "grid connection is required," you know this county is not a fit for your off-grid plan. If the answer is "off-grid is permitted" or "it depends on your specific system," ask for that in writing and understand any conditions (like proof of system adequacy, inspections, etc.).

The Permitting Sequence: How to Actually Proceed

If you are serious about building off-grid in Plumas County, here is the realistic order of steps:

1. Confirm zoning and lot size with the Planning Department. Verify your parcel can legally host a dwelling.

2. Confirm electricity permission with the Building Department early. If off-grid is not allowed, stop here.

3. Order a percolation test through Environmental Health and confirm septic requirements. If engineered design is needed, budget for it.

4. Ask about greywater, rainwater, and composting toilets with Environmental Health. Get written answers on each.

5. Check well feasibility with Environmental Health (minimum 50 feet, subdivision map compliance, water rights).

6. Verify utility expectations (again) with the Building Department. Confirm whether you can proceed without PG&E.

7. Hire a designer or architect familiar with both off-grid systems and California Title 24 code. This person should be able to navigate the permit process.

8. Submit your building permit with complete plans, including septic design, well location (if applicable), electrical system design (solar + battery details), greywater/rainwater system details (if applicable), and proof that you have confirmed all the above with county offices.

This sequence takes time - typically 2-4 months before you have a permit in hand. Do not skip the confirmation steps.

What I Could Not Confirm and Why It Matters

I reviewed all publicly available Plumas County code, ordinances, and department materials. The gaps that remain are:

• Composting toilet legality. Not published; confirm with Environmental Health.
• Greywater and rainwater rules. Not published; confirm with both Environmental Health and Building Department.
• Off-grid electricity permission. Implied by the PG&E service application requirement, but not explicitly addressed; confirm with Building Department.

These gaps are common in California counties. Smaller, rural counties often have not yet codified rules on newer or less common systems. It does not mean the systems are illegal; it means the county has not published its stance. Local confirmation is the only way forward.

Why Plumas County Is Worth Considering Despite the Gaps

I mention this because some off-grid seekers will choose not to pursue a place with uncertainty. Fair enough. But Plumas County has several genuine advantages:

• Site-built tiny homes are clearly permitted, and the county has published a tiny-house information guide, signaling openness to smaller, efficient homes.
• Temporary RV use is relatively generous (120 days annually, and up to 18 months for construction purposes), which gives you options while you build.
• Private wells are permitted without the restrictions I have seen in some counties (e.g., minimum parcel size of 2.5+ acres or prohibitions in certain zones).
• The zoning framework is diverse, with agricultural and forest zones that can support lower-density, self-sufficient living.
• The county is engaged. The Planning and Building departments have published FAQ pages and guidance documents, and Environmental Health has a detailed septic manual. This suggests they are willing to work with applicants.

The trade-off is that you must do your own homework and confirm details locally. The county does not hand you a comprehensive off-grid rulebook. You have to ask the right questions and get answers in writing.

Final Checklist Before You Buy or Build

If Plumas County appeals to you, use this checklist before you commit:

• Confirm your parcel's zoning and minimum lot size.
• Confirm the county will permit off-grid electricity.
• Order a percolation test and understand septic requirements for your soil.
• Confirm whether composting toilets are acceptable.
• Confirm rules on greywater (specifically, whether laundry-to-landscape is permit-free) and rainwater cisterns.
• Confirm well permitting, subdivision map compliance, and water rights status.
• Hire a designer who knows the county's code and off-grid systems.

This is more due diligence than some counties require, but it is exactly the kind of upfront confirmation that prevents costly surprises and permit denials later.