ADUs are allowed in Unincorporated LinnTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Linn, IA
Is your property eligible for an ADU?
# of Properties
7,502
Owner-occupied
88%
Zoning districts
52
Avg Home Value
$370,511
Median Lot Size
1.47 acres
Avg Income
$113,383
Residential Types:
7,502 housing units
Residential
100%
Zoning Districts:
19,008 parcels · 52 districts
AG
65%(12,299)
USR
14%(2,678)
CNR
7%(1,395)
RR1
5%(953)
Other
9%(1,683)
ADU Rules
What can you build in Unincorporated Linn, IA?
Unincorporated Linn, IA 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 is 1,200 sq ft or 50% of the associated single-family dwelling’s floor area, whichever is larger
Detached ADU Size Limits
- –Maximum size is the larger of 1,200 sq ft or 50% of the associated single-family home’s gross floor area.
Max Units
- –1 ADU per parcel on single-family detached lots (ADUs allowed only if there is an existing single-family detached dwelling).
- –0 ADUs per parcel on two-family (duplex) and multifamily lots.
Parking
- –1 space/ADU; no max. Parking follows general off-street rules; may be reduced by admin exception if a parking needs analysis shows sufficiency; in agricultural/residential districts, parking cannot be in the required front yard and must be in a legal driveway with at least 5 ft setback.
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 Iowa municipalities
Rules change at the town line. Check the municipality your property is actually in.
Linn County
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