ADUs are allowed in Lone TreeTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Lone Tree, CO
Is your property eligible for an ADU?
# of Properties
4,557
Owner-occupied
88%
Zoning districts
23
Avg Home Value
$976,850
Median Lot Size
0.18 acres
Avg Income
$156,450
Residential Types:
4,557 housing units
Residential
100%
Zoning Districts:
8,282 parcels · 23 districts
PD
74%(6,117)
SRM
8%(662)
SR3
4%(344)
SR1
3%(258)
Other
11%(901)
ADU Rules
What can you build in Lone Tree, CO?
Lone Tree, 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
Parking
- –No ADU-specific parking min/max; citywide rules allow up to 20% reduction near transit within 1/4 mile with Director approval; parking lots may exceed minimums by up to 10% with Director approval; ADUs exempt from snow storage.
Rental Restrictions
- –Short-term/vacation rentals prohibited unless legally existed with a valid City business license as of March 8, 2023 and compliant with all applicable rules
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.
Douglas County