ADUs are allowed in LafayetteTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Lafayette, CO
Is your property eligible for an ADU?
# of Properties
10,775
Owner-occupied
72%
Zoning districts
22
Avg Home Value
$70,203
Median Lot Size
0.17 acres
Avg Income
$134,398
Residential Types:
10,775 housing units
Single Family
80%
2-3 Family
1%
Apts (4+ units)
2%
Other
18%
Zoning Districts:
11,218 parcels · 22 districts
R1
49%(5,525)
R3
20%(2,248)
R2
11%(1,213)
OTR
7%(787)
Other
13%(1,445)
ADU Rules
What can you build in Lafayette, CO?
Lafayette, CO follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum size of 750 sq ft
Detached ADU Size Limits
- –Maximum detached ADU size of 750 sq ft
- –In residential zones, the accessory building containing a detached ADU is limited to the lesser of 10% of lot area or 750 sq ft
Max Units
- –1 ADU per lot for single-family principal dwelling (attached or detached).
- –0 ADUs for duplex or multifamily principal structures.
- –1 ADU per lot in B1/C1 where a single-family dwelling exists.
Owner Occupancy
- –No owner-occupancy requirement stated.
Parking
- –0 spaces; 1 space if the lot has no off-street parking (driveway/garage/tandem) and on-street parking is prohibited on the block; off-street parking must be on the same lot.
Rental Restrictions
- –STR license required; STRs must be accessory to a primary residence on the lot; if the primary residence is the ADU, no STR in the principal dwelling; no simultaneous STRs in both units
ADU State Law
What can you build in Colorado?
- –ADUs must be approved based on objective standards; no discretionary hearings allowed.
- –Historic properties: Local historic review may still apply in designated historic districts.
- –Exempt parcels: ADUs are not required to be allowed on parcels without adequate water/sewer, in floodways, or on certain historic properties.
- –HOAs cannot prohibit ADUs: HOA rules that conflict with the state ADU law are void.
- –Parking exceptions exist: In rare cases, one parking space may be required if there is no existing off-street parking and on-street parking is prohibited.
- –Local rules still matter: Building code, fire code, utility capacity, and life-safety standards still apply.
- –More permissive is allowed: Municipalities may allow larger ADUs, multiple ADUs, or additional housing types beyond what the state requires.
- –Local zoning controls whether ADUs are allowed at all.
- –HOA rules may still apply.
- –More permissive local rules are allowed.
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
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ADU rules in other Colorado municipalities
Rules change at the town line. Check the municipality your property is actually in.
Boulder County