Colorado does not require a land survey as a legal condition of selling a residential property. The standard Colorado Real Estate Commission contract does not include a survey provision unless the parties negotiate one into the deal. That said, a survey or its less expensive cousin, the Improvement Location Certificate (ILC), enters many Colorado real estate transactions through the lender or title company, not through state law.
What Colorado Law Requires
Under Colorado real estate law, sellers must disclose known material defects, but a survey is not a mandatory disclosure item. There is no Colorado statute requiring a seller to provide a survey or boundary determination to a buyer. The transaction can close without one if neither the lender nor the title company requires it.
In practice, however, most residential transactions in Colorado involve an ILC at minimum. Lenders require it. Title companies often require it for their standard policies. The buyer may request it.
The ILC: Colorado’s Practical Standard
An Improvement Location Certificate is a document prepared by a licensed Colorado surveyor that shows the approximate location of the home and other structures on the lot relative to property lines and easements. It costs $250 to $600 and takes 1 to 2 weeks to complete.
An ILC is not a boundary survey. It does not establish legal property corners and cannot be used to resolve a boundary dispute. But it provides the lender and title company with enough evidence to confirm that the house is actually on the lot, that there are no obvious encroachments onto neighboring property, and that no structure sits in a recorded easement.
Most Colorado mortgage lenders require an ILC for residential transactions. The buyer’s lender will typically require it before issuing the loan commitment. The cost is usually paid by the buyer as part of closing costs, though this is negotiable.
When a Full Boundary Survey Is Worth Getting
An ILC gives you basic comfort that nothing is obviously wrong. A full boundary survey gives you legal certainty about exactly where the property lines run. Consider commissioning a full boundary survey before or at closing when:
- The property has not been surveyed in many years. Older surveys may predate structures that were later built, easements that were later granted, or encroachments that have developed over time.
- The property is rural or mountain land. Rural Colorado parcels often have vague metes-and-bounds descriptions from the original 20th-century settlement era. An ILC is inadequate for verifying land in these situations.
- Structures are close to the property line. A garage that looks like it might be right on the line, a deck that extends toward the neighbor’s yard, or a shed in the back corner warrants verification.
- There is a known encroachment or easement dispute. If the listing disclosure mentions an encroachment or if you can see something that looks wrong, an ILC will not resolve it. A boundary survey will.
- You are buying significant acreage. For properties over 2 to 5 acres, a full boundary survey gives you an accurate picture of what you are actually purchasing.
Commercial Property: ALTA/NSPS Survey Required
Commercial real estate in Colorado follows different standards. Most commercial lenders and title companies require an ALTA/NSPS survey, a detailed survey prepared under the standards of the American Land Title Association and the National Society of Professional Surveyors. ALTA surveys include utility locations, easement depictions, encroachments, zoning setbacks, and other items not addressed in a residential ILC. ALTA surveys cost $1,500 to $3,500 or more for commercial properties.
Advice for Sellers
As a seller, you are generally not required to provide a survey or pay for one. Your main obligation is to disclose known boundary issues, encroachments, or easement problems. If you are aware of a property line dispute with a neighbor, that is a disclosure obligation under Colorado law regardless of whether a survey has been done.
If you want to avoid surprises during the transaction, commissioning an ILC before listing is an option that gives you confidence and can speed up the closing process. A clean ILC heading into a sale removes one potential obstacle.
Advice for Buyers
As a buyer, the ILC your lender requires protects the lender more than it protects you. If you want real protection, consider requesting a full boundary survey as part of your inspection contingency. A seller who refuses to negotiate on a reasonable survey request may be signaling that there is something they do not want documented. Budget $500 to $1,100 for a boundary survey in most of Colorado.
To find a licensed surveyor in Colorado for an ILC or boundary survey, browse our directory by county. Every surveyor listed is sourced from Colorado state licensing records.