ADUs are allowed in MonumentTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Monument, CO
Is your property eligible for an ADU?
# of Properties
5,166
Owner-occupied
75%
Zoning districts
20
Avg Home Value
$627,155
Median Lot Size
0.20 acres
Avg Income
$162,487
Residential Types:
5,166 housing units
Single Family
86%
Apts (4+ units)
1%
Other
13%
Zoning Districts:
5,901 parcels · 20 districts
PUD
48%(2,841)
RP-PRD-4
20%(1,161)
SFD-2
8%(481)
RP-PRD-2
6%(382)
Other
18%(1,036)
ADU Rules
What can you build in Monument, CO?
Monument, 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 50% of the gross floor area of the principal dwelling
Detached ADU Size Limits
- –Maximum detached ADU size is 50% of the principal dwelling’s gross floor area.
- –Maximum detached ADU size limited to 10% of lot area due to the cap on all detached accessory structures.
Max Units
- –ADU ≤ 50% of the gross floor area of the principal dwelling unit
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –No ADU-specific minimum or maximum parking; Director may vary minimums and approve shared/deferrals; in the Downtown Business district, parking may be satisfied with on-street, shared, or off-site spaces within one block.
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.
Check my propertyHow can we help you?
Get matched with trusted local builders
Understand what's allowed on your property
Learn the key rules and size limits for ADUs
Is your property eligible for an ADU?
ADU rules in other Colorado municipalities
Rules change at the town line. Check the municipality your property is actually in.
El Paso County