Land surveyors in Denver: licensed Colorado Professional Land Surveyors, quoted
Land surveyors in Denver are licensed as Professional Land Surveyors (PLS) by the Colorado State Board of Licensure for Architects, Professional Engineers, and Professional Land Surveyors. The Denver specific thing almost every homeowner gets wrong: the document you received at closing is probably an Improvement Location Certificate, and Colorado statute requires it to carry a printed warning that it is not a land survey and is not to be relied upon for establishing fence or building lines. Denver will not accept an ILC where a survey is required. A residential boundary survey typically costs $550 to $1,300. Surveyors.io verifies every license against the state roster and returns up to three quotes within about 24 hours.
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What a Colorado land surveyor license means, and how to check one
Colorado licenses surveyors as Professional Land Surveyors (PLS). CRS 12-120-302 defines a professional land surveyor as an individual who practices professional land surveying and is currently licensed with the board, and defines the practice itself as the application of special knowledge of mathematics, methods of measurement and law for the determination and preservation of land boundaries.
Licensing runs through the State Board of Licensure for Architects, Professional Engineers, and Professional Land Surveyors, created by CRS 12-120-103 and housed in the Division of Professions and Occupations at DORA. The board seats thirteen members, three of whom are practicing professional land surveyors. Its practice rules for surveying live at 4 CCR 730-1, Rule 1.6.
The title is protected. CRS 12-120-305 protects "land surveyor," "land surveying" and "professional land surveyor," along with words of similar meaning and any modification or derivative, and makes unlicensed practice or holding out unlawful. Note the correct terminology when you are comparing firms: Colorado uses licensed, and the protected noun is professional land surveyor, not "registered surveyor."
Verify any Denver surveyor through the DORA license lookup, and confirm an active license with a clean disciplinary record before you hire. On Surveyors.io that check is done for you: we verify each surveyor against the Colorado roster, keep a certificate of professional liability insurance on file, and pull a profile the moment a credential lapses.
The Denver hook: your closing document is probably not a survey
If you bought a house in Denver, there is a good chance you were handed an Improvement Location Certificate and told it was your survey. It is not, and Colorado statute is unusually blunt about it.
CRS 38-51-108(1) says a PLS may prepare an ILC for a specific client based upon the surveyor's general knowledge of land boundaries and monuments in a given area. Read that again: there is no requirement to go find and verify your corners. Board Rule 1.6(F)(2)(a) confirms the ILC shows deed lines with boundary dimensions taken from the deed description or plat, not surveyed lines. And CRS 38-51-108(2)(a)(I) states an ILC "shall not be designated as or construed as being a land survey plat or improvement survey plat."
The statute goes further and dictates the warning printed on the document itself. Under CRS 38-51-108(2)(a)(II) the certificate must be prominently labeled "improvement location certificate" and must contain a statement in this form: "I hereby certify that this improvement location certificate was prepared for (individual or firm), that it is not a land survey plat or improvement survey plat, and that it is not to be relied upon for the establishment of fence, building, or other future improvement lines." Go look at your document. That sentence is almost certainly on it.
Board Rule 1.6(E)(1)(g) states the same thing from the regulator's side: improvement location certificates are not property boundary surveys. Rule 1.6(F)(2)(i) even instructs the surveyor that when the certainty of dimensions to a possible encroachment is not precise enough for a positive determination, a boundary survey shall be recommended. The rule itself tells your surveyor to send you to a real survey.
The real product is the Improvement Survey Plat (ISP). CRS 38-51-102(9) defines it as a land survey plat resulting from a monumented land survey, showing all structures, visible utilities, fences, hedges or walls on the parcel and within five feet of every boundary, plus conflicting boundary evidence, visible encroachments and recorded easements. Because it is monumented, CRS 38-51-102(13) and 38-51-104 mean the corners are actually found or set, marked with reasonably permanent markers solidly embedded in the ground and capped with the surveyor's license number.
Improvement Location Certificate vs Improvement Survey Plat
| Improvement Location Certificate | Improvement Survey Plat | |
|---|---|---|
| Basis of the lines | Deed description and the surveyor's general knowledge of the area | A monumented field survey |
| Corners found or set | No | Yes, capped with the PLS license number |
| Statutory disclaimer printed on it | Yes, required by CRS 38-51-108(2)(a)(II) | No |
| Can establish a fence or building line | No, expressly barred | Yes |
| Accepted by Denver where a survey is required | No | Yes |
| Becomes a public record | No | Deposited with the Denver Surveyor |
| Typical Denver cost | $300 to $600 | $800 to $2,200 |
The practical rule in Denver: if a decision will move dirt or concrete, or if a permit is involved, you need the ISP. If you just needed to close a loan, the ILC already did its job.
Denver permitting: where an ILC stops working
Denver's residential permitting guidance states it plainly: Improvement Location Certificates are not accepted if a survey is required. The guidance requires a boundary survey, land survey plat or improvement survey plat for construction of a new dwelling on vacant land, and requires an improvement survey plat for additions to existing dwellings when the exterior wall of the proposed work sits less than three feet from the lot line.
There is a newer and sharper requirement worth planning around. Denver building permit policy under DCBC 133.3 and 140.6, effective January 14, 2026, provides that when an exterior wall is less than one foot from the minimum setback or the required zoning building separation, a licensed surveyor must verify the setback dimensions during construction, after the foundation formwork is set and before any concrete is placed, on a Structure Setback/Separation Certification form bearing the surveyor's seal and signature. The zoning inspector is authorized to stop work if that form is not on site.
Practically, that means a tight-setback Denver project needs a surveyor scheduled twice: once for the survey behind the drawings, and again as a hold point between formwork and pour. Missing the second visit stops the pour, and a stopped pour is an expensive day.
For a Site Development Plan, Denver requires that the survey sheet be a stand-alone Improvement Survey Plat with all elements required by Colorado statute and board rules. Not a site plan with survey information on it, a separate ISP.
Where Denver survey documents actually go, and when
Colorado has two separate filings, two recipients and two different deadlines, which is where most confusion starts.
Monument records go to the State Board within six months. Under CRS 38-53-104 a PLS must submit a monument record when a survey uses any monument representing a public land survey monument location, unless it is already substantially described in an existing record, or when the surveyor establishes, restores or rehabilitates a public land survey corner. The deadline is six months from the date the monument was used as control or was established, restored or rehabilitated, and the record must describe at least two accessories or reference points. These go to the state board, not the county.
Survey plats go to the county within twelve months. CRS 38-51-107 requires a surveyor who accepts a monument during a monumented land survey to prepare and deposit a plat if that monument is not already of record, with an exception where the monuments accepted or set are inside a platted subdivision filed within the previous twenty years. CRS 38-50-101 gives the twelve month clock, running from the date the monument is accepted in the field or set, and requires indexing within ten working days of deposit.
‼️ The Denver specific part: Denver is a consolidated city and county, and its Department of Transportation and Infrastructure Right-of-Way Survey office states that filing or depositing a Land Survey Plat does not route to and is not recorded with the Denver Clerk and Recorder's office. It goes to the City and County of Denver Surveyor. Out-of-state buyers and even some agents assume a survey plat records like a deed. It does not.
One useful consequence: a plat may already exist for your parcel. Because deposited plats are indexed, an existing one can shorten the records research phase of a new survey, and it is worth asking a prospective surveyor to check before quoting.
Three things Denver owners get told that are not true
"I got a survey when I bought my house." Almost certainly an ILC. CRS 38-51-108(2)(a)(I) bars it from being designated or construed as a land survey plat or improvement survey plat, and the document itself carries the statutory sentence saying it is not to be relied upon for establishing fence, building or other future improvement lines. It was prepared from the deed and the surveyor's general knowledge of the area, with no requirement to find your corners.
"My ILC is good enough to pull a Denver permit." Denver's own residential permitting guidance says Improvement Location Certificates are not accepted if a survey is required, and it specifically requires an improvement survey plat for additions where the exterior wall sits less than three feet from the lot line.
"You record your land survey plat at the Clerk and Recorder like a deed." You do not. CRS 38-50-101 sends survey plats to the public office designated by the county commissioners, and Denver's right-of-way survey office states directly that a Land Survey Plat filing does not route to and is not recorded with the Denver Clerk and Recorder.
Bonus: "The fence has been there twenty years, so it is the property line." A fence is not a boundary, and an ILC is statutorily barred from establishing one. Colorado adverse possession under CRS 38-41-101 requires eighteen years, and for claims arising on or after July 1, 2008 the claimant must prove every element by clear and convincing evidence and show a good faith belief that they were the actual owner which was reasonable under the circumstances. That is a materially harder standard than the folk version. See adverse possession vs boundary survey for how the two questions separate.
What a survey costs in Denver
| Survey | Denver range | Typical use |
|---|---|---|
| Improvement Location Certificate | $300 to $600 | Lender closing requirement only |
| Boundary survey, city lot | $550 to $1,300 | Fences, disputes, corners marked |
| Improvement Survey Plat | $800 to $2,200 | Permits, additions, site development plans |
| Setback verification during construction | $250 to $600 per visit | DCBC 133.3 hold point before pour |
| Topographic survey | $1,000 to $3,500 | Grading, drainage, design |
| Foothills or mountain parcel boundary | $1,500 to $4,500 | Terrain, access and vegetation |
| ALTA/NSPS survey | $2,200 to $8,000 | Commercial acquisition and lending |
Market ranges observed in the Denver metro, not a published fee schedule. Foothills and mountain parcels run at the upper end because terrain and access add field time. See the land survey cost guide for how survey pricing is built.
Denver survey questions, answered
What is the difference between an ILC and a survey in Colorado?
An Improvement Location Certificate is drawn from the deed description and the surveyor's general knowledge of the area, sets no corners, and carries a statutory warning that it is not a land survey and cannot be relied upon to establish fence or building lines. An Improvement Survey Plat is a monumented boundary survey where corners are actually found or set and capped with the surveyor's license number.
Is an ILC accepted for a Denver building permit?
No, not where a survey is required. Denver's residential permitting guidance states Improvement Location Certificates are not accepted if a survey is required, and it requires an improvement survey plat for additions to existing dwellings when the exterior wall of the proposed work is less than three feet from the lot line.
How much does an ILC cost in Denver?
An ILC generally runs $300 to $600 in the Denver metro, compared with $550 to $1,300 for a boundary survey and $800 to $2,200 for a full Improvement Survey Plat. The price gap is exactly the work skipped: no records research into adjoining deeds, no field recovery of corners, and no monuments set. These are market ranges, not a published schedule.
Do I need a surveyor during construction in Denver?
Sometimes yes. Under Denver building permit policy DCBC 133.3 and 140.6, effective January 14, 2026, when an exterior wall is less than one foot from the minimum setback or required building separation, a licensed surveyor must verify setback dimensions after the foundation formwork is set and before any concrete is placed. The zoning inspector can stop work if the sealed certification form is not on site.
Where is a land survey plat filed in Denver?
With the City and County of Denver Surveyor, not the Clerk and Recorder. Denver's right-of-way survey office states that filing or depositing a Land Survey Plat does not route to and is not recorded with the Clerk and Recorder. Under CRS 38-50-101 the plat must be deposited within twelve months of the monument being accepted or set.
How long is the deadline for a monument record in Colorado?
Six months. CRS 38-53-104 requires a professional land surveyor to submit a monument record within six months after the date the monument was used as control or was established, restored or rehabilitated. Monument records go to the state licensing board, while survey plats go to the county, which is a common point of confusion.
How long does adverse possession take in Colorado?
Eighteen years under CRS 38-41-101. For claims arising on or after July 1, 2008, the claimant must prove every element by clear and convincing evidence and must show a good faith belief that they were the actual owner, and that the belief was reasonable under the particular circumstances. A long-standing fence alone does not meet that standard.
Can I use my ILC to build a fence?
No. The statutory certification printed on every Colorado ILC states it is not to be relied upon for the establishment of fence, building, or other future improvement lines. Board Rule 1.6(F)(2)(i) even directs the surveyor to recommend a boundary survey when dimensions to a possible encroachment are not precise enough for a positive determination.
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