Zoning › Colorado › Larimer County › Fort Collins

Fort Collins, CO Zoning

Euclidean-zoning. 23 districts · 7 overlays · 4 applicable state preemptions.

Overview

Code type
euclidean
Naming convention
letter-code

Hybrid letter-code naming (RL/UE/LMN/MMN/HMN for residential intensity ladder; NCL/NCM/NCB for Old Town neighborhood conservation; D/CC/CCN/CCR/CG/CL/CS/HC for commercial; E/RC/POL/MH/PUD for special). Distinct from density-encoded naming — letters signal intensity/context, not du/ac. The 2022 Land Development Code rewrite was adopted then repealed by citizen referendum; the city reverted to the amended Land Use Code (LUC) and has pursued targeted amendments instead (ADU citywide 2025 via Ord. 009/2025; Phase 2 commercial corridors 2025; HB 24-1313 TOC compliance targeted Spring 2026). Rewrite-in-flight flag retained because HB 1313 Transit Center designation amendments pending adoption.

Worth knowing
  • Code-name correction: v1 called it 'Fort Collins Unified Development Code (UDC) / Title 25' — WRONG. The adopted code is the Fort Collins Land Use Code (LUC), hosted on Municode at library.municode.com/co/fort_collins/codes/land_use. Articles 1-5 structure; no 'Title 25' exists. This was a material v1 hallucination.
  • Land Development Code rewrite (2022) was adopted by Council then REPEALED by citizen referendum. City reverted to the amended LUC and pursued targeted amendments instead. This is the defining anomaly of Fort Collins zoning: the rewrite-in-flight flag is load-bearing because the Phase-2 commercial amendments (2025) + HB 24-1313 Transit Center designation (pending Spring 2026) are the post-repeal incremental alternative path.
  • ADU-by-right was newly adopted in 2025 via Ord. 009/2025, adding ADU as permitted use in all zones where detached house is or can be built and moving review down to Basic Development Review. This pre-dated full HB 24-1152 alignment but is now also state-law-required.

+ 6 more in Quirks & notes

Districts

res_sf 7com 7res_mf 3spec 3cbd 1off 1ind 1
CodeNameCategory Min lotHeight CoverageFAR Du/acParking Setbacks F/S/R
UEUrban Estateres_sf21,780 sf[4]40 ft[5]——2230[1] / 15[2] / 25[3]
RLLow Density Residentialres_sf6,000 sf[9]28 ft[10]——5215[6] / 5[7] / 8[8]
RFFoothills Residentialres_sf43,560 sf[11]30 ft——1230 / 20 / 25
LMNLow Density Mixed-Use Neighborhoodres_sf4,000 sf[15]35 ft[16]——81.515[12] / 5[13] / 8[14]
MMNMedium Density Mixed-Use Neighborhoodres_mf—45 ft[20]—1.5201[21]10[17] / 5[18] / 10[19]
HMNHigh Density Mixed-Use Neighborhoodres_mf—60 ft[22]—2300.7510 / 5 / 10
MHManufactured Housingres_sf3,000 sf[23]28 ft——8210 / 5 / 10
NCLNeighborhood Conservation, Low Densityres_sf6,000 sf[27]28 ft[28]——6215[24] / 5[25] / 15[26]
NCMNeighborhood Conservation, Medium Densityres_sf5,000 sf[32]28 ft[33]—0.4[34]121.515[29] / 5[30] / 5[31]
NCBNeighborhood Conservation, Bufferres_mf5,000 sf[38]35 ft[39]—0.5[40]20110[35] / 5[36] / 5[37]
DDowntowncbd—72 ft[44]—4400[45]0[41] / 0[42] / 5[43]
CCCommunity Commercialcom—56 ft[46]—230110 / 5 / 10
CCNCommunity Commercial - North Collegecom—56 ft[47]—230110 / 5 / 10
CCRCommunity Commercial - Poudre Rivercom—45 ft[48]—1.525110 / 5 / 25
CGGeneral Commercialcom—56 ft[49]—1.520115 / 10 / 10
CLLimited Commercialcom—35 ft[50]—1—115 / 5 / 10
CSService Commercialcom—45 ft[51]—1—115 / 10 / 10
HCHarmony Corridorcom—56 ft[52]—1.5—120 / 15 / 15
EEmploymentoff—56 ft[53]—1.520120 / 10 / 10
IIndustrialind—56 ft[54]—1—130 / 20 / 20
RCRiver Conservationspec10,000 sf[55]28 ft——4220 / 10 / 30
POLPublic Open Landsspec—35 ft[56]———030 / 30 / 30
PUDPlanned Unit Developmentspec——————— / — / —

Confidence: confirmed partial under review not found

Overlays

TOD
Transit-Oriented Development Overlay Zone
TOD
LUC §3.10 + §3.2.2(K) parking elimination

Mapped overlay zone covering Mason Street (MAX BRT) corridor, College Avenue corridor, Downtown, and CSU-campus-adjacent areas. Boundary set by map adopted via Council ordinance; primarily overlays D, CC, CCN, CCR, CG, CL, HMN, MMN districts.

parking_minimum0 (parking minima eliminated in overlay)
car_share_reduction5 parking spaces reduction per car-share space provided
intentpedestrian-oriented, mixed-use, high-frequency-transit-supportive density
covers_corridorsMason/MAX BRT; College Ave; Downtown core; CSU campus edge
hb_1313_overlappending Transit Center designation Spring 2026 — expected to overlay/extend TOD footprint to meet HB 24-1313 HOG target
OT-HP
Old Town Historic District / Landmark Preservation Overlay
HP
Municipal Code Ch. 14 (Landmark Preservation) + LUC §3.4.7

Mapped Old Town Historic District (National Register + Local Landmark) plus individually designated local landmark properties citywide. Triggered by address being on designated-resource list or within district boundary.

design_reviewLandmark Preservation Commission (LPC) Certificate of Appropriateness required for exterior alterations to designated/contributing properties
demolition_reviewDemolition of contributing resource requires LPC review + city council confirmation for non-designated 50+ year structures (Demolition/Alteration Review)
adjacency_reviewDevelopment adjacent to designated resource triggers compatibility review under LUC §3.4.7
height_compatibilitynew construction height + massing evaluated against contributing-structure context
materials_standardsexterior materials / window patterns / roof form must be compatible with historic context
FP
Floodplain Regulations (Poudre River + Fossil Creek + Spring Creek + FEMA SFHA)
FP
Municipal Code Ch. 10 (Flood Prevention and Protection) + LUC §3.3.2

FEMA-mapped 100-year floodplain (Zone A/AE) + city-mapped 500-year floodplain + Poudre River floodway + Spring Creek / Fossil Creek / Dry Creek / Boxelder Creek floodways. Triggered by FIRM panel location or city floodplain map.

bfe_plus_freeboardCity requires +2 ft freeboard above BFE for habitable structures (exceeds NFIP minimum +1 ft)
poudre_river_floodwayno new residential structures permitted in Poudre floodway per Ch. 10
critical_facilitiescritical/essential facilities prohibited in 100-yr floodplain
basement_ruleno basements below BFE+freeboard in residential structures
nonresidential_floodproofingcommercial structures may dry-floodproof to BFE+freeboard in lieu of elevation
ENV-NHF
Natural Habitat & Features Buffer / Environmental Standards
ENV
LUC §3.4.1 (Natural Habitats and Features)

Triggered by proximity to mapped Natural Habitats and Features, including: Poudre River corridor, Spring Creek corridor, Fossil Creek Reservoir, Cathy Fromme Prairie Natural Area, Soapstone Prairie edge, wetlands (100 sq ft+), prairie dog colonies, raptor nesting sites, and other designated ecological resources.

buffer_distancesvariable by feature type: 300 ft from Poudre River/wetlands; 50-100 ft for ephemeral streams; species-specific for raptor nests and prairie dog colonies
ecological_characterization_studyrequired for development within or adjacent to Natural Habitats + Features
mitigation_hierarchyavoid > minimize > mitigate; mitigation plan required where impact unavoidable
tree_protectionLUC §3.2.1(C) — significant trees (>6 in DBH) protected; removal requires mitigation
poudre_river_corridorspecific Poudre River Basin Master Plan standards apply
NC-EDGE
CSU Campus Edge / Neighborhood Conservation (NCL/NCM/NCB)
HP
LUC §4.7 (NCL), §4.8 (NCM), §4.9 (NCB)

Mapped NCL (Low Density), NCM (Medium Density), and NCB (Buffer) zoning districts — applied around Old Town and adjacent to CSU to preserve neighborhood character. Each is technically a base district, but functions as a conservation overlay on the pre-existing neighborhood fabric.

density_cappingNCL capped at existing SF density; NCM allows duplex/triplex; NCB allows higher MF transitional
massing_standardsfront-porch / street-facing-entry / 'building-in-context' standards per district
demolition_review50-year structure demolition review process interlocks with LPC review
shared_characterall three are 'neighborhood conservation' districts oriented to preserving contextual scale — rather than form-based transects
PUD
Planned Unit Development Overlay
PD
LUC §4.29 (PUD Overlay District)

Applied via map amendment to specific parcels where applicant seeks density/use/dimensional flexibility in exchange for master plan delivering public benefits (open space, affordability, connectivity). Discretionary legislative process; Planning & Zoning Commission + Council approval required.

master_plan_requiredyes — comprehensive site/development plan with phasing
public_benefits_requiredmust exceed what base district would deliver (affordability, workforce housing, open space, public amenity)
flexibility_grantedmodification of density, use mix, height, setback, lot size, parking
minimum_acreagetypically 5 ac+ (project-specific negotiated)
AP-NOCO
Airport Influence Area (Northern Colorado Regional Airport)
AP
FAA Part 77 + NOCO Airport Master Plan + intergovernmental agreement with Loveland

Parcels within Part 77 imaginary surfaces for Northern Colorado Regional Airport (south of city), primarily affecting southeast and south edges of Fort Collins planning area.

height_hazardPart 77 horizontal/conical/approach surfaces limit structure elevation; obstruction evaluation required above triggering heights
noise_compatibilityNOCO noise-contour overlay influences residential-development suitability
faa_notificationFAA Form 7460-1 notification required for structures penetrating imaginary surfaces

State preemptions

CO HB 24-1313 (Housing in Transit-Oriented Communities)applies
Qualifying condition
Fort Collins qualifies as a 'Transit-Oriented Jurisdiction' under HB 24-1313 based on population (~171,000, above 4,000 MSA threshold) AND presence of high-frequency transit (MAX BRT on Mason corridor, providing ≥15-min peak service). City staff publicly targeting Spring 2026 adoption of Transit Center designations along MAX BRT + College Ave + CSU campus + Downtown to secure eligibility for state affordable-housing grant funds.
Effect
City must designate Transit Centers covering enough land to meet a housing-opportunity target (HOG) based on jurisdiction size, and zone those Transit Centers to permit 40 du/ac average by-right on at least 50% of the designated acreage, with affordability-standards compliance. Statute allows existing TOD Overlay parcels to count toward HOG where densities already meet threshold.
CO HB 24-1313 (Duplex-by-right in SF zones)applies
Qualifying condition
Applies statewide to all Colorado municipalities with SF-zoned residential land regardless of population. Fort Collins has RL (Low Density Residential) and UE (Urban Estate) SF districts; pre-HB-1313 text restricted those to single-family detached. City has not yet adopted a comprehensive duplex-by-right LUC amendment; state law overrides local SF-only restrictions on qualifying parcels.
Effect
Duplexes must be permitted by-right in RL and UE districts on parcels meeting the statute's eligibility criteria (lot size, infrastructure). Local prohibition on two-unit dwellings in SF districts is preempted.
CO HB 24-1304 (Parking minimums preempted near transit)applies
Qualifying condition
Fort Collins is a Metropolitan Planning Organization (MPO) jurisdiction served by high-frequency transit (MAX BRT on Mason corridor). HB 24-1304 preempts parking minimums on multifamily + mixed-use projects within ½-mi walkshed of qualifying transit stops in MPO jurisdictions. Fort Collins' existing TOD Overlay already eliminated parking minimums in the overlay footprint (pre-state-law), so local alignment is largely achieved; statute extends the preemption beyond the current TOD overlay line to the full ½-mi walkshed of MAX stations.
Effect
No local minimum-parking-space requirement may be imposed on qualifying multifamily + mixed-use projects within ½ mile of MAX BRT stations, regardless of base-district standard. Local parking maxima and design standards remain.
CO HB 24-1152 (ADU by-right statewide)applies
Qualifying condition
HB 24-1152 applies to all Colorado municipalities above population thresholds (Fort Collins, at ~171,000, well above threshold). ADUs must be permitted by-right in all residential zones where detached-house is permitted; no owner-occupancy requirement allowed; no discretionary review allowed. Fort Collins already codified ADU-by-right via Ord. 009/2025 amending the LUC to add ADU as permitted use in all zones where detached house is allowed and downgrading review to Basic Development Review — local alignment is achieved.
Effect
ADUs by-right in RL, UE, RF, NCL, NCM, NCB, LMN, MMN, HMN, MH, RC, E and any other residential/mixed-use district where a detached house is or can be built. No owner-occupancy requirement. No separate discretionary approval. City's Ord. 009/2025 already implements this.

Adopted building codes

Denver & state buildings; home rule elsewhere

IBC
Local adoption
IRC
2021
NEC
2023
IFC
Local
IECC (Residential)
Local
IECC (Commercial)
Local

Click a code label to open its state-by-state adoption atlas.

Quirks & notes

  • Code-name correction: v1 called it 'Fort Collins Unified Development Code (UDC) / Title 25' — WRONG. The adopted code is the Fort Collins Land Use Code (LUC), hosted on Municode at library.municode.com/co/fort_collins/codes/land_use. Articles 1-5 structure; no 'Title 25' exists. This was a material v1 hallucination.
  • Land Development Code rewrite (2022) was adopted by Council then REPEALED by citizen referendum. City reverted to the amended LUC and pursued targeted amendments instead. This is the defining anomaly of Fort Collins zoning: the rewrite-in-flight flag is load-bearing because the Phase-2 commercial amendments (2025) + HB 24-1313 Transit Center designation (pending Spring 2026) are the post-repeal incremental alternative path.
  • ADU-by-right was newly adopted in 2025 via Ord. 009/2025, adding ADU as permitted use in all zones where detached house is or can be built and moving review down to Basic Development Review. This pre-dated full HB 24-1152 alignment but is now also state-law-required.
  • TOD Overlay eliminates parking minimums per §3.2.2(K) and provides car-share reductions (5 parking spaces per car-share space). Covers Mason/MAX BRT + College Ave + Downtown + CSU-edge areas. Already aligned with HB 24-1304 within overlay footprint; state law extends preemption to full ½-mi MAX walkshed.
  • Old Town Historic District + Landmark Preservation Commission (Municipal Code Ch. 14, separate from LUC) — historic review lives outside the LUC and requires cross-reference. LUC §3.4.7 handles adjacency/compatibility.
  • Natural Habitats and Features buffer (LUC §3.4.1) is Fort Collins' primary environmental overlay mechanism; 300-ft buffers from Poudre River and wetlands are common dimensional constraints that can exceed base setbacks.
  • HB 24-1313 Transit-Oriented Communities compliance TARGETED FOR SPRING 2026 — Transit Center designations along MAX BRT + College Ave + CSU campus + Downtown; eligibility driver is state affordable-housing grant funding. This is an OPEN item at publication; re-research in Q3 2026 for adopted Transit Center maps.
  • CSU campus sits within/adjacent to HMN, NCM, NCB and parts of D — student housing is intensely concentrated; West Elizabeth / Lake Street / HMN are the high-density MF-with-commercial-ground-floor hotspots. HB 24-1313 TC designation expected to land here.
  • NCL/NCM/NCB 'Neighborhood Conservation' districts function as a tri-tier conservation-on-base-zoning hybrid; listed in districts[] but exhibit overlay-style context-compatibility review.

Formulas

Definitions

height
Measured from grade to the highest point of the roof; LUC §5.1 (Definitions). Parapets included; mechanical screening excluded up to 10 ft per standards.
lot_coverage
Building footprint / gross lot area; expressed as decimal.
far
Gross floor area / gross lot area.
du_ac
Dwelling units per gross acre (LUC convention).
setback_front
Front property line to nearest building face.
setback_side
Side property line to nearest building face.
setback_rear
Rear property line to nearest building face.
parking
Spaces per dwelling unit unless noted. TOD Overlay parcels have zero minimum per LUC §3.2.2(K).

Capacity calculations

max_footprint_sf
lot_area_sf * lot_coverage
max_gfa_sf
lot_area_sf * far
buildable_width_ft
lot_width_ft - setback_side_ft * 2
buildable_depth_ft
lot_depth_ft - setback_front_ft - setback_rear_ft
max_stories_approx
max_height_ft / 10

Massing explorer

Interactive 3D comparison across every district. Drag to orbit, scroll to zoom, use the slider to walk districts, and toggle applicable overlays in the right-side panel.

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Max height
— ft
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Floor area ratio
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Lot coverage
—%
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Setbacks (F / S / R)
— ft
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Parking
— /unit
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Max density
— du/ac
——
Min lot size
— sf
——
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District Category Height FAR Coverage Setbacks Parking Density Min lot Overlays

Sources & references

Primary source
Fort Collins Land Use Code (LUC)
Through 2025 Phase 2 commercial-corridor amendments + Ord. 009/2025 (ADU citywide) · retrieved 2026-04-19
Citations
  1. [1] §4.2
  2. [2] §4.2
  3. [3] §4.2
  4. [4] §4.2
  5. [5] §4.2
  6. [6] §4.4
  7. [7] §4.4
  8. [8] §4.4
  9. [9] §4.4
  10. [10] §4.4
  11. [11] §4.3
  12. [12] §4.5
  13. [13] §4.5
  14. [14] §4.5
  15. [15] §4.5
  16. [16] §4.5
  17. [17] §4.6
  18. [18] §4.6
  19. [19] §4.6
  20. [20] §4.6
  21. [21] §3.2.2(K)
  22. [22] §4.6
  23. [23] §4.10
  24. [24] §4.7
  25. [25] §4.7
  26. [26] §4.7
  27. [27] §4.7
  28. [28] §4.7
  29. [29] §4.8
  30. [30] §4.8
  31. [31] §4.8
  32. [32] §4.8
  33. [33] §4.8
  34. [34] §4.8
  35. [35] §4.9
  36. [36] §4.9
  37. [37] §4.9
  38. [38] §4.9
  39. [39] §4.9
  40. [40] §4.9
  41. [41] §4.16
  42. [42] §4.16
  43. [43] §4.16
  44. [44] §4.16
  45. [45] §3.2.2(K)
  46. [46] §4.18
  47. [47] §4.19
  48. [48] §4.20
  49. [49] §4.21
  50. [50] §4.22
  51. [51] §4.23
  52. [52] §4.24
  53. [53] §4.27
  54. [54] §4.28
  55. [55] §4.26
  56. [56] §4.25

Research status

Publication gates

primary url presentpassedMunicode canonical LUC URL present in research .md header as **Primary URL** and **Primary source**; source.primary_url populated in profile; source_platform=municode; not an aggregator domain
no aggregator citedpassedNo Zoneomics/Steadily/SitePlanGuide/Propwire references in profile or research .md; citations are LUC §X.Y / Municipal Code Ch.N form
confidence tags full formpassedAll KPI values carry {v, c§section-or-status} shape (e.g., c§3.2.2(K), p§4.2, p§4.6); no bare [confirmed] tags; preempted fields carry preempting_law + preempted_value
overlays have parameters trigger confidencepassed7 overlays each with canonical type heading (TOD, Historic Preservation / Local Landmarks OT-HP, Floodplain FP, Environmental ENV-NHF, Historic Preservation NC-EDGE, PUD, Airport AP-NOCO), explicit **Parameters** bullet list of ≥3 keys each, geographic_trigger, base_interaction, and citation/status
preempt section city specificpassedState Preemptions Applicable section is city-specific (>300 chars of Fort Collins-specific prose including MPO membership, MAX BRT, CSU proximity, Ord. 009/2025 local alignment, HB 24-1313 Spring 2026 target); 4 per-law entries (HB 24-1313 TOC, HB 24-1313 duplex, HB 24-1304 parking, HB 24-1152 ADU) each with qualifying_condition_checked + effect + preempted_fields_in_this_record; NOT a link-stub

Data quality

45%completeness5 confirmed112 partial
Documented gaps
  • Full LUC §4 dimensional tables per district (setbacks/heights/lot sizes exact-value verification) — Municode SPA blocks scripted retrieval
  • Exact Ordinance 009/2025 adoption date + effective date for ADU-citywide amendment — deferred to meeting-minutes fetch
  • HB 24-1313 Transit Center designation map — pending Spring 2026 adoption; re-research Q3 2026
  • LUC §3.10 TOD Overlay boundary map + exact corridor alignment
  • Ch. 10 floodplain FIRM panel + freeboard ordinance — confirm +2 ft vs +1 ft
  • Old Town Historic District boundary map (local designation vs NR boundary)
  • Natural Habitats + Features buffer exact distances per feature type (§3.4.1 table)
  • Downtown subarea height caps (Old City Center / Canyon Ave / Civic Center / Entryway) exact values

Known issues

freshness:volatiledata:gaps-present

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