Off-grid site report

Polk County, IA

41.5878, -93.5859 · 810 ft elevation

Read this before you act on anything below. This is my researched starting point for Polk County, IA, 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 rulesPolk County, IA

Zoning & raw-land occupancy

Varies locallyPolk County Planning & Zoning Services administers a countywide zoning ordinance for unincorporated areas; permitted uses depend on the parcel's district, and the Board of Adjustment handles variances. Cities within the county have their own separate zoning. source

Dwellings, tiny homes & RVs

Varies locallyManufactured homes get state-law foundation protections and are defined in county zoning code; RV occupancy rules for unincorporated county land were not confirmed, though nearby towns like Polk City restrict RV living to short stays. source

Building permits & codes

RestrictedPolk County Building Services requires permits and inspections under its own Construction Code (based on the IRC), with only small accessory structures exempted. source

Septic & composting toilets

Generally allowedSeptic systems are permitted and inspected by Polk County Environmental Health Services under state code and county health ordinances, but aerobic treatment units (ATUs) are specifically not allowed. source

Greywater reuse

Unclear - verifyNo Polk County-specific greywater ordinance was found; ask Environmental Health Services directly since only the general sewage disposal chapter is referenced in county resources.

Rainwater harvesting

Unclear - verifyNo Polk County or Iowa DNR guidance on residential rainwater catchment was found in this research; treat as unconfirmed and ask the county directly.

Private wells & water rights

Generally allowedPrivate wells are permitted through the state's Iowa Well Information System, administered locally by Polk County Environmental Health Services under Iowa DNR delegation, which also offers free well water testing. source

Living disconnected from utilities

Varies locallyNo outright ban on disconnecting from utilities was found, but occupancy still requires a Construction Code-compliant structure and permitted septic/well; whether an electrical hookup is mandated for occupancy was not confirmed. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 4.8 hrs/day
Worst month (sizes an off-grid array): 3.3 hrs/day
Yearly output per 1 kW of panels: 1,387 kWh

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Weather1991-2020

Precipitation: 36 in/yr
Snowfall: 35 in/yr
Heating degree days: 6,203 (cold)
Frost-free season: Apr 17 to Oct 17

How far help isstraight-line

Hospital Iowa Methodist Medical Center: 2.5 mi
Fire station Des Moines Fire Station 6: 1.5 mi
Hardware store American Plumbing Supply: 1.3 mi
Grocery ALDI: 1.2 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 50319).

Size a solar system Heat loss & insulation Firewood per winter Rainwater harvest Garden size Panel tilt

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.