At Raincap Construction, we specialize in creating Accessory Dwelling Units (ADUs) and Detached Accessory Dwelling Units (DADUs) that help homeowners unlock the full potential of their properties. Whether you’re looking for additional living space, a rental income opportunity, or a private guest quarters, we’ve got you covered.
Explore ADU and DADU Projects
Unlock Space and Income Potential with an ADU or DADU
Building an ADU or DADU can be the perfect solution if you are looking for additional usable space in your home, or to increase your income. The additional square footage will give you countless new options to create a home environment that fits your needs.
For instance, if you need a dedicated space for work, you could build a home office above the garage. If you’re looking to accommodate guests or family while maintaining privacy, a guest cottage would be an ideal option. Or, if your property has the room, you could build a freestanding DADU and rent it out for additional income.
Not only does an ADU or DADU offer more space and flexibility to live your life, but it also serves as a solid investment, increasing the value of your property.
What is a DADU, and How is it Different from an ADU?
Detached Accessory Dwelling Unit (DADU)
A DADU, also known as a backyard cottage, is a free-standing, fully functional living unit on the same lot as your primary home. It includes everything you’d expect in a regular home—at least one bedroom, a kitchen, and a bathroom— all in its own independent structure. Perfect for hosting family, generating rental income, or building a private, flexible living space. Often these spaces are built over an existing or new garage space.
Accessory Dwelling Unit (ADU)
Similar to a DADU (Detached Accessory Dwelling Unit), an ADU (Accessory Dwelling Unit) typically includes one bedroom, a kitchen, and a bathroom. However, unlike a DADU, an ADU is usually attached to the main home but still has a private entrance, providing a separate, independent living space. Popular ADU configurations include basement or attic conversions, garage transformations, or home extensions.
Benefits of DADU and ADUs
There are a number of unique benefits of building a DADU or ADU on your Seattle property, including:
Types of ADUs We Build
Backyard Cottages or DADUs (Detached Accessory Dwelling Units)
DADUs are independent, standalone structures separate from the main house, making them perfect for rental opportunities on platforms like Airbnb or VRBO. They can also function as guest suites, mother-in-law apartments, or home offices.
Attached ADUs
Unlike DADUs, attached ADUs are integrated into the main house but have their own private entrance. These units allow for independent living without needing to access the main home, perfect for grandparents. They’re ideal for accommodating visiting family, short or long-term rental units, or a flex space.
Garage Conversions
A garage conversion involves transforming your garage or new space above your garage into a livable area, such as a bedroom, home office, or gym. This is a great way to make use of underutilized space.
Basement ADUs
Converting an existing basement into a fully functional living space with a kitchen, bathroom, or kitchenette is a great way to add value and utilize unused space without having to physically add on to your home.
Trust Raincap Construction - Seattle's Premier ADU/DADU Builder
Established in 2007, Raincap Construction is your go-to DADU Builder in Seattle. Not only do we have experience in custom remodeling, but our team is experienced in constructing accessory dwelling units of all different shapes, sizes and architectural styles. Our dedication to quality craftsmanship and attention to detail ensures that your ADU/ DADU will not only be a beautiful addition to your property but will also be built of quality, durable craftsmanship and be safe and structurally sound.
Frequently Asked Questions About ADU’s
Can I Convert My Garage into an ADU?
Absolutely! Garage conversions are one of the most popular ADU options and an excellent way to make use of an underutilized space. We can help transform your garage into a fully functional living area.
How Do I Know if I’m Zoned for an ADU or DADU?
Seattle has specific zoning regulations for ADUs and DADUs. Your architect will be able to guide you through this process. To find out if your property is eligible, you can view the full regulations here.
How Many Square Feet Can My ADU or DADU Be?
The maximum size for ADUs and DADUs in Seattle depends on local zoning laws, but typically, “An AADU is limited to 1,000 square feet in a neighborhood residential zone, including RSL (Residential Small Lot), and up to 650 square feet in a lowrise zone.” Exact measurements and approvals will depend on your specific lot size and the size of your main home. To find out more about square footage requirements, visit here.
Do I need permits to build an ADU?
Permits are required for building an ADU or DADU. Your architect will develop the drawings necessary for this permit, and guide you through this process. To find out more about permitting requirements, visit here.
How much does it cost to build a DADU?
The cost of building a DADU can vary widely based on factors such as size, design complexity, material choices, and site conditions. Once we’ve had an opportunity to survey your property and preview any preliminary architectural sketches or concepts you’ve worked through with your or one of our partner architects, we can put together a highly detailed and transparent estimated pricing package. We may also be able to put together a preliminary construction estimate before you have a drawing package, depending on the project and site conditions.
How long does it take to build a DADU?
The timeframe for DADU completion can vary depending on factors like square footage, complexity of the build, the permitting process, and availability of labor and materials. On average, the timeline for building a DADU in Seattle can range from 6 to 9 months, and the design and permitting process can typically take 4 to 6 months.
Reach Out to The Seattle ADU/DADU Builders at Raincap Construction To Start Your Project
Whether you’re looking to build a mother-in-law suite for grandparents, a flex space, or a cottage to rent out, Raincap Construction is here to make that happen with your own ADU/DADU. Contact us today at (206) 397-0016 or email us at chris@raincapconstruction.com to discuss your ADU/DADU options and get started building yours!