Boulder Fence, Floodplain, Wetland, and Historic Permit Guide

Boulder fences not over seven feet are generally exempt from building permits, but floodplain, wetland, historic district, landmark, sidewalk, and sight-triangle rules can still apply.

Permit takeaway

Boulder says fences not over seven feet tall are exempt from building permit requirements.

Zoning and placement

Floodplain development permits, wetland permits, or landmark alteration certificates may be required before building or replacing fences in floodplain, wetland, historic district, or landmark conditions.

Building and trade review

Regardless of building permit status, fences must be at least 18 inches from public sidewalks and cannot obstruct sight triangles.

Call before applying when

Call before building if the fence is over seven feet, in a floodplain, in a wetland, on a landmark property, in a historic district, near a public sidewalk, or near a sight triangle.

Documents to prepare

• Fence height
• Fence location
• Floodplain or wetland information if applicable
• Historic or landmark status if applicable

Inspection planning

• Confirm exemption or required process
• Obtain floodplain, wetland, or landmark approval if needed
• Keep fence clear of sidewalks and sight triangles
• Maintain approval records

Official sources

• Boulder Building Permits and Inspections
• Boulder Residential Building Permit Guide

This guide is a planning summary. Always verify the current requirements with the local office before starting work.