Washington State’s New Law Allowing Two ADUs on All Homes
- Ryan Pelletier
- Oct 15
- 4 min read
In a significant move to address housing shortages and promote affordability, Washington State has recently enacted a law allowing homeowners to build two Accessory Dwelling Units (ADUs) on their properties. This progressive legislation opens new avenues not only for increasing housing options but also for existing homeowners and real estate investors to enhance their property value and equity.
Understanding Accessory Dwelling Units (ADUs)
ADUs are secondary housing units that can be built on the same lot as a single-family home. They come in various forms, including basement apartments, garage conversions, and stand-alone structures. With the new law, each homeowner can now build up to two ADUs, significantly expanding residential possibilities.
Building ADUs provides homeowners with the chance to create additional living space, which can be utilized for various purposes—whether to house family members, provide rental income, or even serve as a home office or studio.

The Benefits of the New Law
The introduction of this law is monumental. It not only contributes to the growing need for affordable housing but also benefits individual homeowners and the community as a whole. Here are some key advantages of the new regulation:
Boosting Property Value
According to a study by the California Department of Housing and Community Development, properties with ADUs can sell for up to 50% more than similar homes without them. Given the increased demand for rentals, adding ADUs to your property can significantly enhance its market value, providing a great return on investment.
Generating Rental Income
With the rising costs of living, many homeowners are seeking ways to supplement their income. By converting part of their property into an ADU, they can create a source of rental income. Depending on the location, some homeowners report gains of $1,000 or more per month, turning their property into a profitable asset.

Fostering Multi-Generational Living
ADUs offer a practical solution for families wanting to maintain close connections while having the space to live independently. Whether accommodating aging parents or young adults returning home, these units provide an ideal living arrangement.
The Process of Building an ADU
Building an ADU may seem daunting, but with the right guidance, the process can be quite streamlined. Here are some steps to consider if you’re planning on taking advantage of this new law:
Check Zoning Regulations
Although the legislation allows for two ADUs on all residential properties, homeowners must still navigate their local zoning regulations. It's essential to check with your local building department to ensure compliance with any specific rules or restrictions.
Design Your Unit
Once you've confirmed the zoning regulations, the next step is to design your ADU. This involves considering factors such as size, style, and functionality. When designing, think about how the ADU fits with the existing structure and neighborhood aesthetic.
Obtain Permits
Obtaining the necessary permits is crucial for any construction project. This process may include site plan approvals, building permits, and inspections. It’s advisable to work with professionals who can assist in navigating this aspect.
Construction
With permits in hand, you can start the construction of your ADU. Partnering with a reputable construction company can make this phase smoother. A qualified builder will ensure that the unit meets all safety and building codes, providing peace of mind as your project progresses.

How Pelletier Construction Group LLC Can Help
At Pelletier Construction Group LLC, we understand that navigating the complexities of building an ADU can be overwhelming for homeowners and investors alike. As experts in the field, we are prepared to help clients take full advantage of this new law.
Comprehensive Services
From initial consultation to the final build, we offer comprehensive services that cater to your specific needs. Our team will assist you in every aspect of the project, including:
Evaluating zoning regulations specific to your neighborhood
Designing an ADU that aligns with your vision
Managing permits and inspections to ensure compliance
Overseeing construction to maintain high-quality standards
Expertise in ADU Development
We have specialized experience in ADU development, which allows us to provide insights into maximizing your investment. Our professionals stay updated on the latest trends in design and construction, ensuring that your ADU is not only functional but also stylish and appealing to potential renters or family members.
Commitment to Quality and Satisfaction
Our commitment to quality workmanship and customer satisfaction sets us apart. We value clear communication and collaboration, ensuring that you are informed throughout the entire process. Your vision is our priority, and we strive to bring it to life while staying within your budget and timeline.
Embrace the New Opportunities
The new law permitting two ADUs on all residential properties in Washington State is a game changer. Whether you are a homeowner looking to maximize your property investment or a real estate investor seeking viable projects, this is an opportunity you don’t want to miss.
Taking into account the potential to increase property value, generate rental income, and promote multi-generational living, the benefits of this law are clear.
Consider reaching out to us at Pelletier Construction Group LLC to explore how we can partner in this exciting venture. With our expertise and guidance, you can confidently navigate the steps necessary to turn your property into a more valuable asset.
Elevate your property with two ADUs and capitalize on the potential equity this new legislation brings. The future of homeownership in Washington State looks bright, and we are here to help you seize it.





Comments