Subdividing Land Under Chaffee County's 2025 Land Use Code

Density by zone, not a flat lot-size floor -- and how ADUs count

Under the code effective January 1, 2025 (amended September 16, 2025), most residential zones in Chaffee County are governed by a Maximum Density and Minimum Open Space table (Table 2.4.2.1) rather than a flat minimum lot size -- meaning there's no single acreage number to check against a parcel's size. Instead, the applicable zone sets a maximum number of dwelling units allowed per area, and a subdivision proposal has to work backward from that density ceiling rather than forward from a simple acreage-per-lot ratio.

Accessory dwelling units (ADUs) don't automatically count as a full additional unit against that density ceiling: the code counts an ADU as a specific fraction of a full dwelling unit depending on how it's connected for water and sewage service. That means adding an ADU to a subdivision plan can affect the project's total allowed density differently depending on utility design -- a real design lever worth discussing with the Community Planning & Natural Resources Department early, since it can change how many total units a given parcel supports under the density table.

The conservation-subdivision bonus: 4x density for protecting two-thirds of the land

Beyond the base agricultural-zone density standard (one unit per 35 acres in the new Agricultural and Ranching zone described on the hub), the 2025 code includes a specific conservation-subdivision bonus: a landowner who commits to protecting roughly two-thirds of a property in perpetuity as open space can receive up to four times the base density bonus on the remaining, developable portion. County planning staff have described the intent plainly -- clustering a meaningful number of units on a smaller footprint while preserving the bulk of the parcel's habitat and agricultural value, consistent with the commissioners' stated goal that the new code not undermine agriculture in the county.

For a landowner evaluating a large parcel's subdivision potential, this bonus is the actual mechanism worth asking the county about directly -- it can make a conservation-oriented subdivision plan yield meaningfully more buildable units than a conventional, unclustered layout under the same base zone, in exchange for a permanent open-space commitment on the balance of the property. For a buyer of a parcel already platted under this bonus, confirm what portion of the property carries the perpetual open-space protection and what it restricts, since that land isn't simply unused acreage that could be developed later.

What to confirm before relying on a subdivision plan

• The specific zone district and its Table 2.4.2.1 maximum-density figure for the parcel -- don't assume a density number from a different zone or from the old 2014 code.
• Whether an ADU is planned or already present, and how it's counted toward density given its water/sewage connection type.
• Whether a conservation-subdivision bonus has already been used (or is being proposed) on the parcel, and what portion of the land is or would be permanently protected as a result.
• Since the code was amended again in September 2025 after its January 2025 effective date, confirm you're working from the current version, not an earlier draft or a secondhand summary predating the amendment.