Land for Sale in Costilla County, CO
Costilla County lies in Colorado's San Luis Valley, with 3,499 residents (2020 census) and a land market that is mostly large rural subdivisions of 2.5 to 40 acres near Fort Garland and San Luis. Land is inexpensive, but wells, power, road maintenance and water law decide whether a lot is usable. This guide explains the checks.
Costilla County at a glance
- County seat: San Luis, called the oldest continuously occupied town in Colorado.
- 2020 population 3,499; about 1,230 square miles.
- Towns: San Luis and Blanca; Fort Garland is a census-designated place.
- Highways: US 160 and State Highways 142 and 159.
- The Sangre de Cristo Land Grant, awarded by New Mexico's government in 1843, covered most of the county.
The Costilla County land market
Costilla County is one of Colorado's least expensive land markets. Buyers are mostly looking at lots in large, older rural subdivisions such as Sangre de Cristo Ranches near Fort Garland, with parcels of a few acres up to 35 acres or more, plus ranch and grazing land. Listings describe wells or holding tanks, septic or alternative systems, and solar or alternative power on many lots, so many parcels are off-grid. Land prices are low because services are limited, and a cheap lot can cost a lot to make livable.
Water, wells and groundwater rules
Colorado water law is prior appropriation, and surface water in the San Luis Valley has been over-appropriated for many years, with the Rio Grande Compact limiting supplies. Well permits depend on parcel size: an exempt domestic well is generally issued on tracts of 35 acres or more where it is the only well, while smaller parcels typically get a household-use well only that cannot irrigate. Groundwater in the valley is also managed through state rules and sub-district programs, so confirm the permit type and current rules with the Colorado Division of Water Resources before buying. Have any well tested for arsenic and nitrate; quality varies by location.
Power, roads and subdivision rules
Grid power may need a line extension from the San Luis Valley Rural Electric Cooperative, so get a written cost estimate; many owners choose solar. County-maintained gravel roads are common, but not every road in an old subdivision is maintained, so confirm legal access and winter maintenance. Subdivisions often have an owners' association and covenants, and the county sets zoning, so ask for both.
Land grants and mineral rights
Much of the county traces back to the Sangre de Cristo Land Grant, and historic land-grant rights, such as traditional use rights on some parcels, can be a legal issue. Mineral rights are often severed from the surface. Get a title report from a Colorado title company and ask what rights convey.
Before you buy land in Costilla County
- Parcel size and the well permit it can receive.
- Power: distance to the grid and cost, or a solar plan.
- Legal access, road maintenance and winter conditions.
- Owners' association dues, covenants and county zoning.
- Title: severed minerals, land-grant history and easements.
Frequently asked questions
Can I get power to a Costilla County lot?
Often by extending a line from the San Luis Valley Rural Electric Cooperative, at the owner's expense, or by going off-grid with solar. Ask for a written estimate before you buy.
Can I drill a well on a small lot in Costilla County?
Parcels under 35 acres generally get a household-use well only, which cannot irrigate or water livestock. Confirm the permit type with the Colorado Division of Water Resources.
What is Sangre de Cristo Ranches?
A large rural subdivision near Fort Garland with many lots of a few acres, many without grid power or municipal water.