Understanding Open Zoning in Larimer County

By Christine Gwinnup · 2025-05-08

Open zoning (also known as zoning code “O”) is a unique land use designation in Larimer County, Colorado. It may sound flexible—and in some ways it is—but it also comes with limitations that can surprise first-time land buyers.

What Is Open Zoning?

Open zoning is generally intended to preserve views, reduce density, and limit large-scale development in rural areas. It’s most common in western Larimer County, near foothills or environmentally sensitive areas.

What Can You Do on Open Zoned Land?

Build a single-family home
Keep animals for personal use (check limits)
Apply for agricultural, conservation, or limited-use permits

You can typically build accessory structures like barns and shops—but commercial or multi-unit development is not allowed without additional approval.

      Open zoning is not a blank slate—it has specific use restrictions and strict density requirements.
    

Density & Subdivision Rules

Minimum lot size is often 10–35 acres
Subdivision may be restricted or require a complex process
Water rights, septic, and road access must meet rural standards

Permits and Use Reviews

While you can live and build on most open-zoned parcels, any use beyond a primary residence (like a business or event space) may require:

Special Review Permit
Public hearings
Conditional use evaluation

How to Learn More

Always check the property’s zoning with the county before making an offer. Visit the Larimer County Planning website or contact zoning staff directly:

Need help navigating zoning or building restrictions?

Contact Christine Gwinnup – The Little Lady Sells Homes

Where the Larimer County Land Use Code fits in

Open zoning is defined in the Larimer County Land Use Code — the county's rulebook for what every unincorporated parcel can and can't do. The code sets each zone district's permitted uses, minimum lot sizes, setbacks, and the review processes (like site plan review or special review) that certain uses trigger. If your parcel is outside city limits in Larimer County, this code — not Fort Collins' or Loveland's municipal rules — is what governs it.

Two practical steps before you buy or build: look up your parcel's exact zoning on the county's online property records, and read the current Land Use Code section for that district at larimer.gov — the county updates the code, so a summary you read elsewhere (including this page) is a starting point, never the final word. When a plan matters, a call to Larimer County Planning with your parcel number gets you an answer specific to your land.

If you're comparing parcels or getting ready to act on one, I walk buyers and sellers through this regularly — what the zoning realistically allows, which questions to put to Planning, and what it means for the land's value. Details on the buying-and-selling side are in my companion guide to open zoning when buying or selling land in Larimer County.

Frequently Asked Questions

What does O zoning mean in Larimer County?

O is the county's Open zone district, common on rural and foothills land — it allows uses like single-family homes and agriculture at low density, with large minimum lot sizes and restrictions that preserve the area's rural character. The exact permitted-use list lives in the Larimer County Land Use Code.

Can you build a house on open-zoned land?

Generally yes — a single-family home is a typical permitted use — subject to the district's minimum lot size, setbacks, and the county's building and septic/well permitting. Verify your specific parcel with Larimer County Planning before you count on it.

What is the minimum lot size in Larimer County open zoning?

Open zoning carries large minimums, and the current figure and its exceptions come from the Land Use Code, which the county amends over time. Check the code section for the O district or ask Planning with your parcel number — don't rely on a cached number from an article.

Where do I find the Larimer County Land Use Code?

On larimer.gov under the Community Development / Planning pages, alongside the county's zoning maps and property lookup tools. The code plus your parcel's zoning designation together answer most of what a buyer needs to know.

Does open zoning allow horses or livestock?

Agricultural uses including keeping animals are typical in the O district, with the specifics — how many, and any use review triggers — set by the code. If horse property is the goal, I can help you confirm a parcel supports it before you write an offer.

Want A Local's Eye On This?

Christine Gwinnup answers these questions for buyers and sellers every week — at every price point. No pressure, real answers.

Ask Christine Search Homes