Off-grid site report
Canyon County, ID
43.6329, -116.6445 · 2,412 ft elevationRead this before you act on anything below. This is my researched starting point for Canyon County, ID, not legal advice and not a guarantee. Rules change, and the deciding facts on any specific parcel (setbacks, perc results, overlay districts, deed restrictions, road frontage) live at the county or town office, not in any database. Before you buy land or build, confirm the current rules directly with the local zoning and health offices - the sources on this page tell you exactly who to call.
The local rulesCanyon County, ID
Zoning & raw-land occupancy
Varies locallyCanyon County has countywide zoning administered by its Planning & Zoning Commission under authority from Idaho Code Title 67, Chapter 65. Allowed uses depend on your parcel's zone per the county's land-use matrix. source
Dwellings, tiny homes & RVs
Unclear - verifyThe county's land-use matrix governs allowed dwelling types by zone, but treatment of tiny homes or full-time RV living as a standalone dwelling is not confirmed in official sources. Confirmed: accessory structures aren't allowed without an existing residence on the parcel, per the county building permit checklist. source
Building permits & codes
RestrictedCanyon County's Building Division enforces adopted international building codes with local design amendments. The State of Idaho now handles HVAC permitting/inspection, the county still handles wood/pellet stove permits, and homes 150+ feet from a public road need fire district water/turnaround approval. source
Septic & composting toilets
Generally allowedSeptic systems are permitted by Southwest District Health under state DEQ rules, not directly by the county. A pre-development meeting with SWDH is required before submitting a formal septic application. source
Greywater reuse
RestrictedNo Canyon County-specific greywater ordinance exists; greywater is regulated through the same SWDH/DEQ onsite wastewater rules as septic. source
Rainwater harvesting
Unclear - verifyNo county or state page was found specifically addressing residential rainwater harvesting; this is genuinely unconfirmed, not a known ban.
Private wells & water rights
RestrictedIDWR permits all wells statewide and has paused approval of new consumptive groundwater rights in southern Canyon County while studying aquifer health, though existing water users and single-home domestic wells retain protections. Confirm your parcel's status directly with IDWR. source
Living disconnected from utilities
Unclear - verifyNo standalone ordinance addresses off-grid living directly; conditions like septic approval and fire-district access get folded into the building permit process on a case-by-case basis. source
Sun30-year normals
- Peak-sun hours, annual average
- 5.1 hrs/day
- Worst month (sizes an off-grid array)
- 2.3 hrs/day
- Yearly output per 1 kW of panels
- 1,436 kWh
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Weather1991-2020
- Precipitation
- 11 in/yr
- Snowfall
- 12 in/yr
- Heating degree days
- 5,178 (moderate)
- Frost-free season
- Apr 10 to Nov 4
- Design low
- 14 °F
How far help isstraight-line
- Hospital
St. Luke’s Nampa Medical Center - 2.9 mi
- Fire station
Caldwell Fire Station No. 2 - 2.3 mi
- Hardware store
True Value - 2.0 mi
- Grocery
Grocery Outlet - 0.2 mi
From OpenStreetMap. Road miles will be longer, often much longer in hill country.
Plan this spot
These open with this location's real numbers already filled in (ZIP 83605).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Canyon County, ID?The rules above are the jurisdiction. The land check runs the parcel itself: flood zone, soils and septic suitability, wetlands, slope, access, climate, and these verdicts, from a parcel number or coordinates.
Check a parcel →Share or save this report:New report
Sources: US Census Bureau geocoder; NLR PVWatts v8 (solar); NOAA NCEI 1991-2020 climate normals (nearest station) or Open-Meteo (ZIP-centroid) for weather; Open-Elevation; OpenStreetMap contributors. Public data retrieved Aug 21, 2026; agencies update their layers on their own schedules. Planning data, not a survey or legal advice.
New here, or not sure where this fits? Start here walks through the whole thing in order.