This article is intended to illustrate the standards for accessory residential building forms established in SMC § 16.12 as determined by the permitted residential uses in each zoning district.
(Ord. 1418-25, 7/24/2025)
The form-based standards in this article are aligned with the density and dimensional standards for each zoning district in SMC § 16.12. Accessory residential building forms are permitted in the following zones:
A.
LDR
B.
MDR
C.
HDR
D.
NC
E.
UC
F.
RO
The following residential uses are permitted for applying detached building form standards provided the use is allowed in the underlying zone:
A.
Accessory buildings and structures to single-family and two-family dwellings; and
B.
Accessory dwelling units (ADUs)
(Ord. 1418-25, 7/24/2025)
A maximum of two accessory dwelling units are permitted per lot. The following ADU configurations are allowed provided the dimensional standards of the underlying zone are met.
A. 
One attached ADU and one detached ADU.
B. 
Two attached ADUs.
C. 
Two detached ADUs in any configuration.
The conversion of an existing accessory structure, such as a garage, into an ADU is permitted provided the conversion meets the requirements in SMC § 16.20.100.
(Ord. 1418-25, 7/24/2025)
A. 
Lot, Building Setbacks, and Building Form (see diagram and table below).
LDR
MDR
HDR
NC
UC
RO
Lot and Building Placement
Lot Area (min)
n/a
n/a
n/a
n/a
n/a
n/a
Setbacks
A
Front Yard (min)
10 ft behind the primary structure unless a conversion of existing structure
B
Each Side (min)
5 ft
5 ft
5 ft
10 ft
10 ft
5 ft
C
Rear Yard (min)
5 ft
5 ft
5 ft
5 ft
5 ft
5 ft
Coverage
Lot Coverage (max)
50%
60%
60%
60%
80%
60%
Building Form
D
Building Height (max)
24 ft
Floor Area (max)
1,000 sq. ft. per unit
(Ord. 1418-25, 7/24/2025)