Fence Installation Permits in Longmont

Local Rule

Longmont Building Inspection Division (Planning &

Longmont requires a Building Inspection Division permit for any fence, including replacing an existing fence with a different material at the same location and height; there is no height threshold under which a permit is skipped. Residential fences and walls are capped at 6 feet under Municipal Code Section 15.05.100. A privacy screen that is not anchored into the ground, such as one placed around a patio, does not need a permit since it is not a structure. Fences taller than the code allows require a Variance from the Board of Adjustment or Planning and Zoning Commission. Applications go through Accela Citizen Access or in person at the Development Services Center; the city notifies applicants of the exact permit fee once the application is approved.

Source · Verified September 2026

Longmont Building Department

Hours and procedures can change — call ahead to confirm.

How This Compares to Boulder County

Longmont's own rule is shown above (Permit required). Here is the separate rule that applies at the county level, for context:

Boulder County Community Planning & Permitting

The County requires a building permit for any fence over 6 feet high, stricter than the 7-foot exemption common elsewhere in Colorado, and for retaining walls over 48 inches. No fence of any height may interfere with the sight triangle at intersections, which is sized by the posted road speed, and a fence perpendicular to predicted flood flows is reviewed case-by-case and may need a Floodplain Development Permit.

See the full county page

Nearby Cities with Verified Rules

Other cities near Longmont with a confirmed fence installation rule:

FAQs

Building It Yourself? Here's What You'll Need

Popular tools and materials homeowners use for a fence installation project:

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