City of Spokane

Spokane Municipal Code

***Note: Many local criminal codes can now be located under Chapter 10.60 SMC while others are now cited under the Revised Code of Washington (RCW), which was incorporated into the municipal code in 2022. (See SMC 10.58.010). Code Enforcement, including Noise Control and Animal Regulations are located in Chapters 10.62 through 10.74.

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Title 17C
Chapter 17C.300
Section 17C.300.100
 

Title 17C Land Use Standards

Chapter 17C.300 Accessory Dwelling Units

Section 17C.300.100 General Regulations
  1.  
  2. Where the Regulations Apply.

Attached and detached accessory dwelling units are permitted in the RA through RHD zones, including planned unit developments, subject to the limitations of subsection (B) of this section.

  1.  
  2. Limitation.

Two accessory dwelling units are allowed per lot in the RA, R1, R2, RMF, and RHD zones subject to the development standards of the underlying zoning district.

  1.  
  2. ADU versus principal dwelling.

Section 17C.300.130(A)(1) SMC establishes the methods by which an ADU may be created. In cases where a proposed dwelling unit meets the definition and criteria of both an ADU and an additional principal dwelling (e.g., the second unit of a duplex or a second single-unit residential building on a lot), applicants may choose whether the proposed dwelling unit is permitted as an ADU or a principal dwelling.

Date Passed: Monday, June 2, 2025

Effective Date: Friday, July 11, 2025

ORD C36696 Section 3