Fort Collins, CO Zoning Overlays & Bonuses: Density Bonus Law (2026)
Key Facts
- Standard max density
- 9 dwelling units per gross acre
- Affordable bonus density
- 12 dwelling units per gross acre
- Bonus site size
- 10 acres or less (base bonus)
- Minimum density
- 4 units per net acre (3 if ≤20 ac)
- Larger-site condition
- 60% AMI affordability on 10-20 ac portion
Summary
In the Low Density Mixed-Use Neighborhood District, Fort Collins caps residential density at nine dwelling units per gross acre, but Section 4.5(D)(1)(b) of the Transitional Land Use Code lets qualifying affordable housing projects build up to twelve units per gross acre, a bonus of three units per acre, on parcels of ten acres or less.
(b)The maximum density of any development plan taken as a whole shall be nine (9) dwelling units per gross acre of residential land, except that affordable housing projects (whether approved pursuant to overall development plans or project development plans) containing ten (10) acres or less may attain a maximum density, taken as a whole, of twelve (12) dwelling units per gross acre of residential land. Additionally, affordable housing projects containing more than ten (10) acres but no more than twenty (20) acres may attain a maximum density, taken as a whole, of twelve (12) dwelling units per gross acre of residential land so long as the term of lease or sale of all of the dwelling units associated with the acreage exceeding ten (10) acres, but no more than twenty (20) acres, are available on terms that would be affordable to households earning sixty (60) percent or less, on average, of the area median income for the applicable household size in the Fort Collins-Loveland metropolitan statistical area, as published by the Department of Housing and Urban Development.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Municipal Code: Supplement 155 | Transitional Land Use Code (for project before May 17, 2024): Supplement 61 | Traffic Code: Supplement 27).
Full Breakdown
5 of the Transitional Land Use Code governs the Low Density Mixed-Use Neighborhood (L-M-N) District, one of Fort Collins' primary residential zones. 5(D)(1)(a) sets a minimum overall average density of four dwelling units per net acre for most residential developments, dropping to three dwelling units per net acre for developments of twenty acres or less. 5(D)(1)(b) then sets the maximum density for any L-M-N development plan at nine dwelling units per gross acre, except that affordable housing projects, whether processed as overall development plans or project development plans, on parcels of ten acres or less may reach a maximum of twelve dwelling units per gross acre.
The bonus extends further for larger affordable sites: affordable housing projects between ten and twenty acres can also reach twelve units per gross acre on the acreage beyond ten acres, but only if every unit built on that extra acreage is leased or sold on terms affordable to households earning sixty percent or less of the area median income for the Fort Collins-Loveland metropolitan statistical area, as published by HUD; those income-restricted units on the extra acreage do not themselves count toward the percentage of affordable units required to qualify the project as an affordable housing project in the first place.
One caveat on currency: this density standard sits in the Transitional Land Use Regulations, which Municode publishes as the edition governing projects submitted before May 17, 2024. Fort Collins adopted a replacement land use code for applications filed after that date, so an applicant starting a new affordable housing project today should confirm the current density cap with the Planning Department before relying on the twelve-unit figure.
Violations & Fines
A development that exceeds the L-M-N district's density cap, including the twelve-unit affordable housing bonus, without meeting the underlying affordable housing qualification criteria is out of compliance with the Land Use Code and can be denied approval or required to reduce unit counts before a plat or plan is recorded. Ongoing violations of an approved density-restricted plan are misdemeanors under Section 2.14.4(A), punishable per City Code Section 1-15, with each day of noncompliance a separate offense.
Frequently Asked Questions
How much extra density can affordable housing get in Fort Collins' L-M-N district?
Does the density bonus apply to affordable projects larger than ten acres?
What is the minimum density required in the L-M-N district?
Sources & Official References
Other rules in Fort Collins
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