The Dadu

What does DADU mean? A Detached Accessory Dwelling Unit (DADU) is a self-contained secondary residence situated on a single-family property. These elegant compact dwellings—sometimes called granny flats or backyard cottages—feature private entrances, complete kitchens, bathrooms, and living spaces. ADUs offer versatile solutions for multigenerational living, generate rental income, or create affordable housing opportunities. Their rising popularity reflects both contemporary housing challenges and a growing appreciation for thoughtful, sustainable living arrangements.

Building A Better DADU

For over a decade, Greenpod has refined the art of small-footprint living to its highest expression. Our meticulously crafted Accessory Dwelling Units represent the pinnacle of spatial efficiency and energy performance in the industry—where every square inch serves both purpose and beauty.

We source only the finest sustainable, non-toxic materials of exceptional quality, ensuring your investment endures for generations. Each Greenpod ADU is thoughtfully customized to harmonize with your property’s unique characteristics—from solar orientation and scenic vistas to topographical features—creating a dwelling that feels organically connected to its surroundings.

Beyond aesthetic considerations, our designs embrace Age-In-Place principles with complete ADA compliance, allowing these elegant spaces to evolve with changing needs while maintaining their sophisticated functionality. The result is a dwelling that seamlessly blends environmental consciousness with timeless livability.

How To Build an DADU in Port Townsend

ADUs can get fairly complicated, but don’t worry, Greenpod handles it all for you.

What are the rules for ADU’s in Washington?

HB 1337: HB 1337 laws of 2023 requires jurisdictions to allow two ADUs per lot within urban growth areas, by six months after the next periodic update due date.

Types of ADUs: There are two basic types of ADUs: Attached ADU (AADU) and Detached ADU (DADU).

Requirements: To construct an accessory dwelling unit in Washington, you may construct up to two ADUs in SF5000, SF7200, and SF9600 zones. Parking is no longer required for accessory dwelling units, but you cannot remove existing off-street parking space(s) unless replaced somewhere else on the property. The property owner does not have to live on the property where an ADU is located

How big can an ADU be?

The size of an ADU in Washington State can vary depending on the location and the type of ADU. For example, in Seattle, the minimum lot size required for a Detached ADU (DADU) is 3,200 square feet in neighborhood residential zones. A DADU is limited to 1,000 square feet of gross floor area in neighborhood residential zones, including RSL, and 650 square feet in a lowrise zone. According to a new state law, ADUs can be up to 24 feet high and 1,000 square feet.

How do you build an ADU?

Building an ADU is much like building any other living dwelling. The challenge comes when you try to optimize for your particular lot while being as space efficient as possible. Luckily, that’s where Greenpod shines. We specialize in small spaces, and with over ten years of experience in ADU, Tiny Home, and Modular contruction, we know exactly how to deliver you a fantastic small-footprint home that feels spacious. By using SIP paneling and high quality, sustainably sourced materials, our ADU’s are among the most energy efficient in the industry. In many cases, all it would take to make our homes net zero would be the addition of a solar panel.

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