How to Buy Land in Colorado with Well and Septic: What Relocators Need to Know

A few months ago, I worked with a couple relocating from Austin who had their eyes set on a 5-acre parcel just outside Evergreen, off Squaw Pass Road. The price looked right, the views were incredible, and they were ready to make an offer. Then I asked them one question: "Have you confirmed this lot can support a well and septic?" They had no idea that was even a concern. That question saved them from a $30,000 mistake.

If you are moving to Colorado from a city or suburb, buying rural land is a completely different process than buying a house with city water and sewer. Jefferson County, Park County, and Clear Creek County all have parcels that look buildable on paper but present serious infrastructure challenges once you dig deeper. Here is what I walk every land buyer through before they fall in love with a piece of ground.

Understand What "How to Buy Land in Colorado with Well and Septic" Actually Means

When a property is not connected to a municipal water or sewer system, you are responsible for providing your own water supply via a well and managing your own wastewater via a septic system. In Colorado, both of these systems are regulated and permitted separately, and neither is guaranteed just because the land exists. A lot can sit there for 40 years without a well or septic permit ever being pulled, and that means no previous owner has confirmed the land will support either system.

Before you close on any unimproved land in Jefferson County or the surrounding foothills, you need to know three things: whether a well permit can be obtained, how deep that well might need to go, and whether the soil will pass a percolation test for septic approval. These are not minor details. They are the difference between land you can build on and land you cannot.

Colorado Well Permits: Who Approves Them and What They Cost

Well permits in Colorado are issued by the Colorado Division of Water Resources, not the county. The permit type you will need depends on your parcel size and intended use. For parcels under 35 acres, a household use only well permit is typically required, which limits water use to in-house domestic purposes and some outdoor irrigation. This is a critical distinction if you are planning a large garden, livestock operation, or secondary structure.

The permit application itself costs around $100 to $200, but drilling the well is where costs climb. In the Jefferson County foothills, well depths commonly range from 200 to over 600 feet depending on location and geology. Drilling costs typically run between $25 and $50 per foot, so budget anywhere from $15,000 to $40,000 or more depending on your specific parcel. I always recommend buyers hire a local well driller for a consultation before closing, not after.

Septic Systems: Percolation Tests and County Approval

Septic system approval is handled at the county level in Colorado. In Jefferson County, the Environmental Health division oversees septic permitting, and they require a soil profile and percolation test before they will issue a permit for a new system. A perc test measures how quickly soil absorbs water, which determines whether a conventional septic system will work or whether you will need an engineered alternative system.

Engineered systems, such as mound systems or drip irrigation systems, can cost two to three times more than a conventional system. A standard conventional septic install in Jefferson County typically runs $15,000 to $25,000. An engineered system can push $40,000 to $60,000 or higher. I have seen buyers walk away from deals entirely after perc test results came back, and I have also seen sellers reduce their price significantly to account for those added costs. Either way, you need this information before you are committed.

Due Diligence Steps I Recommend for Every Land Buyer

Here is the checklist I go through with every client buying rural land in Colorado. First, pull the county assessor records and confirm the parcel has legal access, either deeded or via easement. Many rural parcels in Jefferson and Park County are accessed via shared dirt roads, and you want to confirm that access is legally documented. Second, contact the Colorado Division of Water Resources to search for existing well permits associated with the parcel. If there is an existing well, verify it has a pump test report and water quality test on file. Third, contact Jefferson County Environmental Health to ask whether a septic permit has ever been issued. If not, budget for a perc test during your inspection period, which typically runs $500 to $1,500. Fourth, talk to a local well driller about typical depths in that area. I have a few trusted contacts in Jefferson County who will give buyers an honest assessment without a sales pitch.

Working with a Local Agent Who Knows Rural Land

Rural land transactions in Colorado have a completely different rhythm than a standard home purchase in Lakewood or Littleton. The inspection period needs to be longer, the contingencies need to be structured differently, and the due diligence items are specific to land, not homes. A lot of agents who primarily work residential are not familiar with how to protect a buyer in a land deal.

I have helped buyers evaluate parcels from Conifer to Bailey to the unincorporated areas west of Morrison. I know which areas tend to have shallower water tables, which county offices to call first, and how to write a contract that gives you real protection if the well or septic situation does not pencil out. If you are relocating to Colorado and considering land, I am glad to talk through what you are looking for before you start touring parcels.

Cody Walker | Local real estate expert for Lakewood, Littleton, Denver (Denver Metro Area)

(970) 528-0604

cody@sourceofhome.com