Commissioners: “We will continue to value, respect, and support all individuals as we serve the people of Boulder County.” Read full message.

Immigrant Resources, including a Know Your Rights Booklet, available on the Immigration Resources webpage.

Notice of Limited Services during the week of March 3-7, 2025. In-person building team services will be unavailable. and virtual services will be limited. Inspections will not be available on Monday, March 3rd and Tuesday, March 4th, and will be limited and not guaranteed for the remainder of the week. View more details on the Building Safety and Inspections Services website.

Floodplain Development

A floodplain development permit:

  • Is required for all development in the floodplain
  • Shall be obtained from the Public Works Department (formerly called Transportation) before the start of construction

All development and proposed improvements are required to conform to Article 4-400 Floodplain Overlay District of the Boulder County Land Use Code.

Floodplain development permit applications must be submitted to Boulder County Public Works Department and shall include the following information as applicable:

  • Development plan stamped by a Colorado Registered Professional Engineer addressing the items set forth in Section 4-407 of the Boulder County Floodplain Regulations
  • Location map (2000′ scale U.S.G.S. topo)
  • Valley cross section at site
  • Construction and material specifications
  • Description of extent to which water course will be altered
  • Floodway analysis (if required)
  • Title report for Floodway Permit
  • Engineering report addressing those standards set forth in Section 4-407 of the Boulder County Floodplain Regulations.

View Article 4-400 Floodplain Overlay District of the Boulder County Land Use Code for more information or contact the Boulder County floodplain administer at floodplainadmin@bouldercounty.org or 303-441-3900.

Learn more about the county’s involvement in the Floodplain Remapping Project

Contact Us

Community Planning & Permitting - Floodplain Administration

303-441-3930
Email: floodplainadmin@bouldercounty.gov

Location

2045 13th St.
Boulder, CO 80302

Map and Directions

Hours

8 a.m. to 3 p.m. Monday, Wednesday, Thursday
10 a.m. to 3 p.m. Tuesday

Mailing Address

Community Planning & Permitting
Floodplain Administration
P.O. Box 471
Boulder, CO 80306