Adams County’s primary flood risk areas follow the South Platte River, which runs southeast through the county from Brighton through Commerce City toward the Denver border. Sand Creek, a South Platte tributary, runs through Commerce City and east Denver. Properties near these waterways may fall within FEMA Special Flood Hazard Areas and need an elevation certificate for flood insurance. In 2026, elevation certificates in Adams County typically run $400 to $700.
South Platte River Flood Zone in Adams County
The South Platte River enters Adams County from Weld County near Brighton and flows southeast through Commerce City before exiting into Denver County. The South Platte floodplain through Brighton and Commerce City has FEMA Zone AE designations along the river corridor. Brighton’s riverside neighborhoods and commercial properties near the river, and the industrial properties in Commerce City along the South Platte, are the most commonly affected areas.
The 2013 Front Range floods reached Adams County along the South Platte corridor. While the county was less severely impacted than Boulder and Larimer counties, some flood map revisions in Adams County followed the 2013 event.
Sand Creek
Sand Creek runs west-to-east through Commerce City and the adjacent east Denver neighborhoods before reaching the South Platte. Sand Creek and its associated drainages have FEMA flood zone coverage in some areas. Properties near the Sand Creek Greenway in Commerce City, east Denver adjacent to Adams County, and the lower portions of Sand Creek before it joins the South Platte may be in designated flood zones.
What the Certificate Documents
A licensed Professional Land Surveyor visits the property and measures the lowest floor elevation using NAVD 88. The measurement is compared to the Base Flood Elevation on the current FEMA Flood Insurance Rate Map, and the results are recorded on FEMA Form 086-0-33. Your NFIP insurer uses the certificate to calculate your flood insurance premium. Flat terrain in Adams County makes field visits efficient, typically 1 to 2 hours, with certificate delivery in 1 to 2 weeks.
Finding a Surveyor in Adams County
To find an elevation certificate surveyor in Adams County, browse our directory. Every surveyor listed is sourced from Colorado state licensing records. Only a licensed Colorado PLS can complete a FEMA-accepted elevation certificate.