New Fence Installation in Louisville, CO

A new fence in Louisville is a fast permit on paper, typically 1–2 weeks from application to approval, but the height, material and sight-line rules behind it depend on whether the property sits inside a Planned Unit Development or under the City’s general zoning code. Fire Hardening rules also reach the fence line near the house. This page covers what Louisville checks before a fence permit is issued.

Fences Are a Fast-Tracked Permit With a Site Plan

Louisville’s permit table lists a new fence as requiring a permit, filed as a “Minor Permit: Fence,” and fences sit in the City’s fast-tracked category with a typical review time of 1 to 2 weeks. The submittal is Building Plans, either showing compliance directly or using the City’s signed Solid Fence Certification Form, plus a Site Plan to scale showing property lines, a north arrow, existing and proposed fencing, the edge of the street or back of sidewalk, the footprint of structures on the property, and the height of the fence including any sections with differing heights.

Where Class A fire-rated fencing or a PUD fence design applies, the site plan has to show the location and material of those sections specifically. We build that site plan from a property survey or GIS record rather than a rough sketch, since the City uses it to check height, material and sight-line compliance together.

Height Depends on Whether a PUD Applies

For a property without a Planned Unit Development, Louisville Municipal Code Section 17.16.120 sets the baseline: fences may not exceed 4 feet in height in any front yard, or 6 feet in height in any other area of the property. Many Louisville neighborhoods do carry a PUD with its own fence design and height standards, which apply in place of that general rule where one exists, and the City’s Land Use and Planning GIS map is where a specific parcel’s PUD can be found. Where the Fire Hardening Code and a PUD’s design standards conflict, the Fire Hardening Code takes precedence.

All solid fences between 4 and 6 feet in height also have to meet minimum construction standards under LMC Section 15.32.020, which covers how the fence itself is built rather than just how tall it stands.

Sight Lines and the Fire Hardening 5-Foot Rule

Every fence has to meet the minimum vision clearance area requirements at intersections of streets, alleyways and trails under LMC Section 17.16.100, which is the City’s sight-triangle rule for corner lots and any run near a trail or alley crossing. A fence line staked without checking that clearance at a corner lot is one of the more common reasons a layout gets revised before installation.

The Fire Hardening Code adds a material rule tied to distance from the house: any fencing within 5 feet of a building’s exterior walls must use a fire-resistant material with a flame spread index of 25 or less, the Class A rating set by the National Fire Protection Association. Most metal fences qualify, and select composite materials do as well, though the specific product’s Class A rating should be confirmed with the manufacturer or supplier. Fencing beyond 5 feet from the house may use wood, subject to the zoning rules above.

Utilities and Setbacks the City Does Not Set

Before any post hole is dug, Colorado 811 needs to be contacted so member utilities can mark their lines; that locate does not cover every private line, such as irrigation, low-voltage lighting or an owner-installed gas or drain line, so those still need to be identified separately. Beyond the front-yard height limit and the sight-line rule above, Louisville’s fence handout does not publish a separate fixed setback distance from the property line, so an exact setback figure for a given parcel should be confirmed with Planning, particularly where a PUD may set its own standard. Pool and spa barrier fencing is governed by the adopted building code rather than the general fence ordinance, so a pool enclosure’s specific height and gate requirements need to be confirmed for that installation rather than assumed from the general fence height rule.

We flag any recorded utility or drainage easement crossing the planned fence line during the site visit, since a fence in an easement can be subject to access or removal obligations even where the height and material otherwise comply.

How We Sequence a Louisville Fence Installation

We start with the site plan: property lines, the PUD status of the parcel if any, sight-triangle checks at any corner or trail edge, and distance from the house for the Fire Hardening 5-foot rule. Colorado 811 is contacted for a locate before layout is finalized, and the Building Plans or Solid Fence Certification Form are prepared alongside the site plan for the minor permit submittal.

Once the fast-tracked permit is issued, posts are set to the approved layout and height, with solid fence sections built to the LMC 15.32.020 construction standard. Gates, corner transitions and any Class A material section near the house are installed to match what was shown on the approved site plan, so the finished fence lines up with what the City reviewed rather than drifting from it in the field.

Common Questions

How tall can my fence be in Louisville?
Where no PUD applies, LMC 17.16.120 limits fences to 4 feet in any front yard and 6 feet elsewhere on the property. Many neighborhoods have a PUD with its own height and design standard that applies instead, so the parcel’s PUD status should be checked first.

Do I need a permit for a new fence?
Yes. A new fence needs a Minor Permit: Fence, submitted with Building Plans (or the Solid Fence Certification Form) and a Site Plan. It is a fast-tracked permit with a typical review time of 1 to 2 weeks.

Can I use wood next to my house?
Not within 5 feet of the building’s exterior walls. The Fire Hardening Code requires Class A fire-resistant material, such as most metal or select rated composites, within that 5-foot zone. Wood is allowed beyond 5 feet, subject to the zoning height rules.

What do I need to check before digging post holes?
Contact Colorado 811 for a utility locate, since it does not mark every private line. Also confirm the sight-triangle clearance at any corner, alley or trail edge under LMC 17.16.100, and check for recorded easements that could affect the fence line.

Talk to Us About Your Project

Tell us the fence’s purpose, the approximate run and gate locations, and whether the yard borders a street corner, alley, trail or easement. We will check the parcel’s PUD status, the Fire Hardening material rule near the house, and the sight-line requirements before the site plan is drawn up for permit submittal.