Accessory Dwellings Production

Table 1 summarizes the accessory dwellings permitted within the current RHNA cycle reporting. Accessory dwellings are counted as low- and moderate-income affordable units and make up 80% of the dwelling units in the low-income category and 74% of the dwelling units in the moderate-income permitted units through December 2024. Between 2019-2024, based on a County housing market study, accessory dwelling units and manufactured homes were considered affordable for low- and moderate- income households (split evenly between both categories). With the expiration of the study at the end of 2024, these housing types are now categorized as above moderate-income housing.  

 
Table 1: Accessory Dwellings (RHNA Reporting)

Number of Dwellings Permitted (2019-2024)

Income Category

Counted for
Low-Income

Counted for
Moderate-Income

Counted for
Above-Moderate-Income

All Dwelling Types

226

246

1336

Accessory Dwellings Only

181

182

89

Percentage of Accessory Dwellings

80%

74%

7%

 
Figure 1 shows the number of accessory dwellings permitted annually in the past six years. The number of accessory dwellings permitted annually increased significantly from 2021-2023, peaked in 2023 at 104 units, slightly reduced to 95 units in 2024, and continued to slightly reduce to 89 units in 2025
 
Figure 1: Number of Accessory Dwellings Permitted Annually, 2019-2025

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As of March 2025, the County has received 19 applications for pre-reviewed accessory dwellings, 5 of which were received in 2025. The Pre-Review Accessory Dwelling Program provides plans to applicants at no cost, reducing overall costs and expedited processing time.