New Fence Installation in Evergreen, CO

A new fence in Evergreen is one of the few projects here that does not start with a Jefferson County permit application. It still starts with a set of rules the county expects a property owner to follow on their own — height limits that change depending on where the fence sits on the lot, a sight-distance triangle at corner intersections, and, since mid-2026, a wildfire rule about what can sit close to the house.

No Permit, But Not No Rules

Jefferson County does not require a permit for residential fences in unincorporated areas of the county, which covers Evergreen. That absence of a permit application does not mean an absence of standards — the height and placement rules below still apply, and compliance is self-certified by the property owner rather than checked through a county plan review before the posts go in.

Because no inspector signs off on a fence before or after installation, we treat the height and setback rules as fixed points to design against from the first property-line walk, not as items to revisit if a neighbor or the county raises a question later.

Height Depends on Where the Fence Sits

Jefferson County’s fence guidance sets two different height ceilings depending on location. Within the required front setback of the applicable zone district, a fence cannot exceed 42 in. In the interior side and rear yard — away from the front setback and away from a corner side yard — a fence can go up to 6 ft. A corner side yard fronting a street can also reach 6 ft. within the side setback, as long as it stays clear of the vision triangle described below.

Agricultural-zoned parcels get a different front-yard rule: fences over 42 in. are allowed within the front setback on Agricultural-zoned land, unlike standard residential districts. Some Evergreen mountain parcels are zoned Agricultural (A-1/A-2) rather than a standard residential district, so the zone district assigned to a specific property changes which height rule applies at the front of the lot.

Corner Lots Need a Vision Triangle Check

At street intersections, the county maintains an adopted Vision Clearance Triangle, and no fence, wall, or similar obstruction over 42 in. can sit inside that triangle, measured from the flowline or edge of pavement. This applies independent of the general side-yard height allowance — a fence that would otherwise be allowed to reach 6 ft. in a corner side yard still has to drop to 42 in. or less anywhere the vision triangle overlaps that yard.

We lay out a corner-lot fence against the triangle geometry before setting posts, since the triangle is a fixed sight-distance shape tied to the intersection, not a rule of thumb that can be eyeballed from the yard.

Retaining Walls Count Toward Total Height

Where a fence sits on top of a retaining wall — common on Evergreen’s sloped mountain lots — the county measures the combined height of the wall and the fence together, and that combined figure cannot exceed the maximum height allowed in the applicable zone district. A property with a 3 ft. retaining wall along a side yard, for example, has less usable fence height above it than a flat lot would allow before hitting the same ceiling.

We survey existing grade changes and retaining structures on a property before finalizing fence height, since Evergreen’s terrain makes retaining-wall-plus-fence combinations more common than on a flat Denver-metro lot.

Pool Barriers Follow a Separate, Taller Standard

If a fence is serving as a barrier around a swimming pool, a different and taller rule applies. Colorado’s swimming pool regulation sets a minimum fence height of 60 in. with a self-closing, self-latching gate, and the latch itself has to sit at least 54 in. high. A separate wading pool needs at least a 3 ft. fence. Those figures sit well above the standard 6 ft. yard maximum is not a conflict — 60 in. is within the general 6 ft. yard allowance — but the gate hardware height is a specific requirement a standard yard fence does not need to meet.

Wildfire Code Adds an 8-Foot Clearance Rule

Jefferson County’s 2025 Colorado Wildfire Resiliency Code, effective July 1, 2026, requires nonflammable fencing within 8 ft. of a structure as part of its defensible-space and structure-hardening standards. On an Evergreen property, where a fence often runs close to the house to enclose a deck, garden, or side yard, that rule can change the material choice for the section of fence nearest the home even though the rest of the fence line is unaffected.

Evergreen and Conifer are named among the county’s highest wildfire-risk areas, and more than two-thirds of Jefferson County sits within the Wildfire Hazard Overlay District — context that makes this rule a real design input on most Evergreen properties rather than an edge case.

How We Sequence a New Evergreen Fence

We start by identifying the property’s zone district, since that determines the front-setback height limit, and by walking the corner-lot vision triangle where it applies. Retaining walls and grade changes get measured into the height budget before posts are laid out, and any section of fence within 8 ft. of the house gets flagged for wildfire-compliant material.

Because there is no county permit or inspection step, the final walkthrough on an Evergreen fence is our own verification against the height, setback, and material rules above, done before the crew leaves rather than left to a future compliance question.

Common Questions

Do I need a permit to build a new fence in Evergreen?
No. Jefferson County does not require a permit for residential fences in unincorporated areas, which includes Evergreen, but the county’s height and placement rules still apply and are not checked by an inspector.

How tall can my fence be?
It depends on location. Within the required front setback, the limit is 42 in. In interior side and rear yards, and in a corner side yard outside the vision triangle, a fence can go up to 6 ft. Agricultural-zoned parcels allow taller front-yard fencing than standard residential districts.

What is the vision clearance triangle and does it affect my fence?
On corner lots, the county maintains a Vision Clearance Triangle at the intersection, and no fence over 42 in. can sit inside it, even in a yard that would otherwise allow a taller fence.

Does the 2026 wildfire code limit what fence material I can use?
Yes, for the section closest to the house. Effective July 1, 2026, Jefferson County’s wildfire code requires nonflammable fencing within 8 ft. of a structure as part of its defensible-space standards.

Talk to Us About Your Project

Tell us your property’s zone district if you know it, whether any part of the fence line is near your house or on a corner lot, and whether the property has a retaining wall along the fence run. We lay out the fence against Jefferson County’s height, vision-triangle, and wildfire-material rules before we set the first post.