Off-grid site report
Alamosa County, CO
37.4733, -105.7858 · 7,533 ft elevationRead this before you act on anything below. This is my researched starting point for Alamosa County, CO, 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 rulesAlamosa County, CO
Zoning & raw-land occupancy
RestrictedAlamosa County has countywide zoning under its Land Use and Development Code, administered by the Land Use and Building Department; most rural parcels are zoned Rural (RU) and allow residential use, but vacant land won't get an address until you're pursuing a building, septic, or utility permit. source
Dwellings, tiny homes & RVs
RestrictedThe county prohibits using an RV, camper, or tent as a permanent residence; temporary seasonal or construction-phase RV permits exist but are time-limited and require an installed septic system and legal water source. source
Building permits & codes
RestrictedAlamosa County requires a permit for any occupied structure or structure over 200 square feet, plus fences over 6 feet, solar, decks, and OWTS work; fees are based on construction valuation, so confirm actual cost with the Building Department. source
Septic & composting toilets
RestrictedEvery rural residential property needs a permitted onsite wastewater treatment system installed by a county-licensed installer, governed by the state OWTS Act and Regulation 43, with a roughly 1-acre minimum lot size for a system. source
Greywater reuse
Largely prohibitedAlamosa County has not opted into the state's greywater program; the county says it does not currently allow graywater systems, so all wastewater must run to a permitted septic system. source
Rainwater harvesting
Unclear - verifyNo county-specific rainwater rule was found; the statewide limit on rain barrel collection under the Colorado Division of Water Resources' prior appropriation system likely applies, but this is not confirmed at the county level.
Private wells & water rights
RestrictedA legal water source, almost always a permitted well, is required for residential use; permits go through the Colorado Division of Water Resources' Alamosa field office, and nearly all parcels qualify except those in Deer Valley Meadows Unit III. source
Living disconnected from utilities
Varies locallyFull off-grid living (well, septic, and off-grid power) is common in unincorporated Alamosa County since only the City of Alamosa and East Alamosa have central water/sewer, but the county warns grid electric can be costly or unavailable and other services may be limited. source
Sun30-year normals
- Peak-sun hours, annual average
- 6.3 hrs/day
- Worst month (sizes an off-grid array)
- 5.1 hrs/day
- Yearly output per 1 kW of panels
- 1,803 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 9 in/yr
- Heating degree days
- 8,586 (severe)
How far help isstraight-line
- Hospital
San Luis Valley Regional Medical Center - 5.3 mi
- Fire station
Alamosa Fire Station 1 - 4.3 mi
- Hardware store
Harbor Freight Tools - 6.0 mi
- Grocery
Tienda Latina Guate-Mex - 4.4 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 81101).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Alamosa County, CO?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.