QUICK VIEW Kootenai County ADU Requirements
Verified with Kootenai County Planning 11-2-2022*
Bedroom Count: Unlimited Bedrooms
Bathroom Count: Unlimited Bathrooms
Kitchen Count: 1
Heating Source: Separate
Entry Door: 36″
ADU’s per Parcel: 1
Off Street Parking Requirement: NA
Prohibitions: 10 acres required if located over the Rathdrum Prairie Aquifer
Conversion of Existing to ADU: Yes
ADU’s Allowed in Following Zones: All zones except Light Industrial and Mining. Controlled by the underlying zoning requirements for setbacks, etc.
Special Requirements:
1.CCR’s may restrict ADU’s
2.Over the Rathdrum Prairie Aquifer requires 10 acres for an ADU
Homeowner Residency Requirement: No requirement for homeowner to reside in primary home
Primary/ADU for Rental: No restriction on renting both the primary and ADU for rental purposes
Detached ADU’s: 1,000 s.f. or 50% of the primary home s.f. whichever is GREATER*
Measured From: Exterior Walls
Main Floor Size: Total s.f.
Second Floor Size: Total s.f.
Basement Allowed: Under consideration*
Attached ADU’s: Same as Detached ADU except:
Measured From: Interior Walls
Main Floor Size: Total s.f.
Second Floor Size: Total s.f.
Basement Allowed: Under consideration*
Garages: Not counted if the garage has an 8′ wide or larger garage door
In General: Must comply with the setback requirements for Accessory Buildings within the underlying zoning
Distance from Primary Homes: NA
Front Setback: Underlying zone
Back Setback: Underlying zone
Sides Setback: Underlying zone
Alleyway Setback: Underlying zone
Singles Story ADU: No Specific Design Requirements
Wall Height: NA
Roof Height: NA
Roof Pitch: NA
Two Story ADU:
Wall Height: NA
Roof Height: NA
Roof Pitch: NA
45 Deg. Setback Required: NA
Over Garage ADU: NA
Wall Height: NA
Roof Height: NA
Roof Pitch: NA
45 Deg. Setback Required: NA
Architectural Requirements: NA
ADU Permit Process: standard application plus a “will serve” letter from water district
Special Hearing Requirement: NA
Permit Cost: $85 + Building Permit
NA
Kootenai County ADU Codes Highlighted
*Please verify all information as rules and zoning are subject to change.