Floodplain Development Permits

Floodplain Development Permits

This webpage provides Floodplain Permitting information related to:

  • General Floodplain Development Permit
  • Individual Floodplain Development Permit
  • Floodway Review Procedures
  • Bridge Construction
  • Stream Restoration

General Floodplain Development Permits

The Boulder County Floodplain Management Program issues General Floodplain Development Permits (FDP) in accordance with Section 4-404.1 of the Boulder County Land Use Code:

General FDPs cover projects and uses in the FO District that have been determined by the Floodplain Management Program to meet the applicable criteria set forth in Section 4-404.1(B) of the Boulder County Land Use Code, which, among other criteria, includes those projects and uses that have been determined to have minimal or no impact on flood hazards.

General FDPs allow certain projects and uses to take place without the need for an Individual Floodplain Development Permit. Some projects permitted by the General FDP still require notification of the Floodplain Management Program as described below.


  • Notification can be submitted by:
    • Email (floodplainadmin@bouldercounty.org)
    • Mail
      Boulder County – Floodplain Management Program
      ATTN: General FDP Notifications
      P.O. Box 471
      Boulder, CO 80306
  • Notification submittals, at a minimum, must include the following information:
    • Project description, including materials to be used and a narrative on the expected impact to the channel and Floodplain
    • Location description with accompanying location map
    • Site Plan

Boulder County will respond in writing no later than 14 days following submittal of notification and confirm whether or not a project is covered under the General FDPs, whether more information is required in order to make a determination, or whether the project is NOT covered by the General FDPs and submittal of an application for an Individual FDP is required.

Individual Floodplain Development Permit

An individual floodplain development permit is required for all development in the floodplain that is not covered under a General Floodplain Development Permit.

Floodplain development permits:

  • Must be obtained from the Boulder County Floodplain Management Program, before the start of construction.
  • Floodplain Development Permit Fees

Individual Floodplain Development Permit Application

Floodplain Management provides more information on floodplain regulations, drainage, flood preparations, maps and requirements. To check to see if your property is within a regulatory floodplain go to Boulder County e-mapping (searchable property information), or visit the official interactive web map.

Floodway Review

A Boulder County Floodway Review is required for any project in a county-administered floodway that results in 100-year surface elevation increases between 0.00 and 0.5 foot (existing vs. proposed conditions). For increases in a county-administered floodway that are greater that 0.5 foot, an approved Conditional Letter of Map Revision (CLOMR) is required prior to permitting. In FEMA-administered floodways, a CLOMR is required for projects that result in any increase (greater than 0.00) in 100-year water surface elevations prior to permitting.


For information on requirements for new buildings or improvements, review the Individual Floodplain Development Permit (FDP) Checklist for Buildings.

Bridge Construction

For more information about permit requirements, please visit the Bridge Construction Permit Requirements page.

Stream Restoration

Visit the Stream Restoration Permit Requirements page for more information.

Contact Us

Community Planning & Permitting (formerly the Land Use Dept.)

Email: Ask a Planner Form
Main: 303-441-3930

Courthouse Annex Building

2045 13th Street
Boulder, CO 80302
Hours are Monday, Wednesday and Thursday from 9 a.m. to 2 p.m. On Tuesdays the department is open by appointment only from 12:30–4:30 p.m.
Map & Directions

Mailing Address

Community Planning & Permitting
PO Box 471
Boulder, CO 80306