Walla Walla, WA, Municipal Code
Updated June 2021
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https://www.codepublishing.com/WA/WallaWalla
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Accessory Dwelling Units
The city's zoning code permits one internal, attached, or detached accessory dwelling unit (ADU) by right for any legal single-family home or duplex (§20.118.030). Use-specific standards address maximum size, building permits, and entrances.
Residential Infill Development | Zoning Reform and Code Writing
The city's zoning code permits a wide range of "missing middle" housing types by right in its lowest density residential district (§20.100.040.F). These types include duplexes, triplexes, fourplexes, and cottage housing.
Walla Walla, WA
2010 Population: 31,731
2010 Population Density: 2,478.02/square mile