Off-grid site report

Ottawa County, OK

36.9040, -94.8780 · 801 ft elevation
Read this before you act on anything below. This is my researched starting point for Ottawa County, OK, 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 rulesOttawa County, OK

Zoning & raw-land occupancy
Unclear - verifyI couldn't find any evidence Ottawa County has adopted a countywide zoning ordinance. Oklahoma law lets counties opt into zoning under the County Zoning Enabling Act, but whether Ottawa County has done so is not confirmed, so ask the Ottawa County Commissioners' Office directly. Incorporated towns like Miami or Commerce may have their own separate zoning. source
Dwellings, tiny homes & RVs
Unclear - verifyNo Ottawa County rule on tiny homes, RV living, or minimum dwelling size turned up in my research. Absent a confirmed local ordinance, this would default to whatever state building baseline applies, or to town rules if you're inside Miami, Commerce, or another incorporated town, so confirm with the county commissioners. source
Building permits & codes
Unclear - verifyI found no Ottawa County building department, permit portal, or locally adopted building code. That likely means the statewide Uniform Building Code Commission baseline applies by default, but you should confirm with the county courthouse whether any local permitting exists. source
Septic & composting toilets
RestrictedSeptic and other on-site sewage systems are regulated statewide by the Oklahoma DEQ under OAC Title 252 Chapter 641, which requires a soil evaluation and a Report for On-Site Sewage (the 581 form) before DEQ will issue a permit. This runs through DEQ's local office covering Ottawa County, not through a county department. source
Greywater reuse
Generally allowedI didn't find any Ottawa County-specific greywater restriction, so the general Oklahoma state baseline applies, which is permissive.
Rainwater harvesting
Generally allowedNo county-specific rainwater harvesting ordinance surfaced in my research, so this falls under Oklahoma's generally permissive state approach.
Private wells & water rights
Generally allowedI found no Ottawa County well ordinance beyond the standard state framework, so private wells fall under Oklahoma Water Resources Board rules at the state level.
Living disconnected from utilities
Varies locallyBecause no Ottawa County certificate-of-occupancy or mandatory utility hookup rule turned up, living off-grid in unincorporated parts of the county appears to be allowed by default, following the common rural-Oklahoma pattern. Incorporated towns within the county may impose their own hookup rules, which I could not confirm, so check with the specific town if you're inside city limits. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average
5.2 hrs/day
Worst month (sizes an off-grid array)
3.5 hrs/day
Yearly output per 1 kW of panels
1,467 kWh
JFMAMJJASOND

Weather1991-2020

Precipitation
44 in/yr
Snowfall
6 in/yr
Heating degree days
3,952 (moderate)
Frost-free season
Apr 5 to Oct 28

How far help isstraight-line

Hospital
INTEGRIS Miami Hospital
2.2 mi
Fire station
Quapaw Nation Fire and EMS
2.5 mi
Hardware store
Farm and Home
11.4 mi
Grocery
Walmart Supercenter
0.1 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 74358).

Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt

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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 22, 2026; agencies update their layers on their own schedules. Planning data, not a survey or legal advice.