ADUs (Accessory Dwelling Units) in Vancouver, WA
ADUs, or Accessory Dwelling Units, are gaining popularity in Vancouver, WA as homeowners recognize their potential to maximize property value and address housing needs. In this blog post, we'll discuss the key considerations for designing and building ADUs in Vancouver, while highlighting the city's streamlined and cost-effective process for ADU construction.
Size and Height Restrictions:
ADUs in Vancouver, WA are subject to size limitations based on the existing home and lot size. Detached and attached ADUs cannot exceed 800 square feet or 50% of the main house's living area. Additionally, the height of the ADU must not exceed 25 feet.
Parking Requirements:
Vancouver, WA has eliminated the requirement for additional parking when constructing an ADU. This means you can retain your existing driveway without the need for additional parking spaces.
Exterior Design:
ADUs should not occupy more than 50% of the front facade of the main home. However, this is often not a concern as most homeowners choose to build ADUs in the rear of their properties or convert existing structures such as garages. It is important for the ADU to visually match the design style of the primary dwelling to maintain a cohesive aesthetic.
Utilities and Connections:
ADUs have the advantage of connecting to the existing utilities of the main home, whether they are attached or detached. This eliminates the need for costly utility connections from the street, making ADUs more cost-effective.
Fire and Sound Separation:
The city of Vancouver requires fire and sound separation between ADUs and the main residence. When ADUs are detached, this requirement is naturally fulfilled by the space between the units. For attached ADUs, a one-hour fire-rated wall, typically achieved by using 5/8" fire-rated gypsum board, is necessary. Sound separation can be accomplished with a 2x6 stud wall filled with R-21 batt insulation, and metal resilient channels on one side of the wall.
Permit Process:
Obtaining permits for ADUs in Vancouver is a straightforward process. Depending on whether the ADU is attached, requires an addition, or involves internal conversion, homeowners typically apply for an addition, remodel, or new dwelling permit.
Vancouver, WA offers a simplified and cost-effective process for designing and constructing ADUs. By adhering to the size restrictions, maintaining aesthetic compatibility, and fulfilling the fire and sound separation requirements, homeowners can create functional and visually pleasing ADUs that meet their needs. With the city's streamlined permit process and the ability to connect to existing utilities, building an ADU becomes an accessible option for homeowners in Vancouver, WA.
