Before you buy land, a tiny home, or a single solar panel, find out what your county allows. Zoning and permits decide whether your plan is legal, and the rules change from one county to the next, sometimes from one parcel to the next. Off-grid builders get hit hardest, because the three systems you most want to do differently (power, water, waste) are the ones inspectors care about most.
This guide gives you the order to check things in, the exact questions to ask, and the off-grid specific traps. It is general information, not legal advice. Your county’s answer in writing is the only one that counts.
The 60-second version
- Zoning decides whether a small dwelling can sit on your land at all.
- Building codes decide how it must be built and which systems need inspection.
- Health department rules decide your water source and waste system, and they are often stricter than the building rules.
- How your home is classified (house, RV, ADU, or manufactured home) changes all three. Settle this first.
Step 1: Know which category your tiny home falls into
Most tiny home problems start here. Officials sort homes into a few buckets, and each bucket has its own rules.
| Category | What it usually means | Common catch |
|---|---|---|
| Tiny house on a foundation | Treated as a regular dwelling under the local building code. | Some places set a minimum square footage, which can rule out very small homes. Many have adopted code provisions for tiny houses; ask whether yours has. |
| Tiny house on wheels (THOW) | Often treated as an RV or a trailer, not a house. | Many counties don’t allow living in an RV full-time on private land, or limit it to a set number of days a year. |
| Accessory dwelling unit (ADU) | A small second home on a lot that already has a main house. | Several states have made ADUs easier to permit, but cities still set size, setback and owner-occupancy rules. |
| Manufactured or modular home | Built in a factory to a federal or state standard. | Can be easier to finance and insure, but may be limited to certain zones. |
Shipping container homes are generally treated as regular site-built dwellings and must meet the same code. They are not exempt from permits. See our container insulation guide for the build side.
Step 2: Check zoning before you buy the land
Zoning is the question “can I put a home here?” Call or visit the county or city planning department and ask these before you make an offer:
- What is this parcel’s zoning designation, and is a single dwelling allowed?
- Is there a minimum home size or minimum lot size?
- Are tiny homes, ADUs, or homes on wheels allowed? Can I live in one full-time?
- What are the setbacks from property lines, roads, and water?
- Are there deed restrictions or an HOA on this parcel?
- Can I have a second dwelling or a guest structure?
Ask for the answers by email. A verbal “yeah, that’s fine” has cost people their whole project.
Step 3: The permits you may need
Which ones apply depends on your classification and location. Expect some mix of these:
- Building permit: for the structure itself. Usually needs plans.
- Electrical permit: covers wiring, and often covers a solar and battery system too.
- Plumbing permit: for water supply and drain lines.
- Septic or wastewater permit: through the health department, often the hardest one to get.
- Well permit: if you’re drilling for water.
- Driveway or access permit: if you’re adding a road entrance.
- Zoning or land use permit: confirms the use is allowed on the parcel.
Fees vary widely. Put a realistic line for permits in your budget; the off-grid cost breakdown shows where permits sit among the other costs.
Step 4: The off-grid traps most guides skip
Waste: the one that kills the most plans
Many counties require an approved septic system or an approved alternative for any dwelling, and some do not accept composting toilets as the primary system. Greywater rules are separate and differ widely. Find out what the health department accepts before you choose a toilet or design the plumbing. Our utilities checklist walks through every system.
Power: solar is usually fine, but the install may need a permit
Being off-grid doesn’t remove electrical code. Some jurisdictions require a permit and inspection for battery and inverter installations, and some require a licensed electrician to sign off. Size the system first with our solar sizing guide, then ask what the inspector will want to see.
Water: legal source and proof of supply
Some areas won’t issue a permit for a dwelling without a proven legal water source such as a well or an approved hookup. Rainwater collection and hauled water are legal in many places but not accepted as the sole source in others. Ask directly.
“Off-grid” and living without utilities
A few jurisdictions require a connection to a power utility for an occupancy certificate, even if you never use it. Others explicitly allow fully off-grid homes. This is one of the most important questions on the list, so ask it by name.
Step 5: If the answer is no
- Ask for a variance or conditional use permit. It’s a formal exception, and it works more often when you bring a clear plan.
- Look at nearby counties. Neighboring areas can have very different rules.
- Look at tiny-home-friendly communities and rural areas with fewer restrictions, but still get written confirmation.
- Check for unincorporated land. It often has lighter rules than a city, but not always lighter rules on septic and water.
Get the checklist before you talk to the county
Get the free Off-Grid Planning Pack. The Utilities Checklist includes a permits page, and the Build Budget Worksheet has a line for every fee you will be quoted.
A practical order of operations
- Decide the category (foundation, wheels, ADU, modular).
- Shortlist counties, then email each planning and health department with the questions above.
- Only then shop for land and put in an offer, contingent on the permits you need.
- Size your power, water and waste systems to what they will approve.
- Get a total cost with permits and budget for them.
Quick FAQ
Do I need a permit for a tiny house on wheels?
The trailer itself is usually registered like a vehicle, but living in it on a piece of land is a zoning question. Ask your county whether full-time living in an RV or THOW is allowed on the parcel.
Can I build a tiny home without any permits?
In some rural counties with minimal building rules, you can. In most places, unpermitted work can lead to fines, an order to remove the structure, and trouble with insurance and resale. Always ask first.
Is a composting toilet legal?
It depends on the county. Some accept them, some only as a supplement to a septic system. The local health department is the one to ask.
What’s the cheapest way to start?
Spend a few hours on emails and calls to planning and health departments before spending anything on land. It’s the cheapest step and it prevents the most expensive mistakes.
This article is general information and not legal or professional advice. Rules change; confirm everything with your local planning, building and health departments.