Attached ADU Builder in Mercer Island, WA
An attached accessory dwelling unit can give your family more flexibility without placing a separate building in the backyard. QH Build helps Mercer Island homeowners create independent living spaces within or connected to their existing homes. Whether you’re considering a new addition or converting suitable space, we help plan an ADU around your property and the people who will use it.
An attached ADU has its own living area, kitchen, and bathroom while remaining part of the main structure. It can offer privacy for a family member or provide a separate space for another household. From the first design discussion through permits and construction, our team helps you move the project forward.
Attached ADU Options for Your Home
The right layout depends on the space available and how your home is built. An ADU addition on Mercer Island may extend from the side or rear of the house. Other possibilities include converting a basement or creating a unit above an attached garage. A second-story addition may also be worth exploring if the existing structure and property can support the proposed design.
Each option involves different decisions about access, privacy, and the connection to the main home. As an attached ADU builder on Mercer Island, QH Build helps you consider these details early, before settling on a layout. Our goal is to make the new unit comfortable for its occupants and practical for the rest of the household.
Our ADU Design and Construction Process
We begin by learning how you intend to use the space. Is it for a relative who wants to live nearby? Do you need a flexible unit that can serve different needs over time? Your answers help guide the size, layout, and features of the proposed ADU.
Next, we review the home and property, develop the design, and coordinate the permitting steps. During ADU construction on Mercer Island, we manage the building work and keep you informed as the project progresses. Considering the existing structure and the new unit together helps us plan a space that works as part of the home.
A Separate Living Space That Fits Your Home
An attached ADU needs to function as an independent residence. A thoughtful floor plan provides space for cooking, bathing, relaxing, and daily routines without making the unit feel disconnected from the property around it. Entry placement, natural light, storage, and privacy all shape how the space feels.
The exterior and interior connections matter too. For an addition, we consider how its form and materials relate to the existing house. For a conversion, we focus on making efficient use of the available area. QH Build approaches each Mercer Island ADU as a custom project rather than applying the same layout to every home.
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What Our Customers Say!
An attached ADU is an independent living unit added to or created within the main house. It provides its own space for living, cooking, and bathing while remaining connected to the primary structure.
Space above an attached garage may be an option for an ADU. The answer depends on the existing structure, the proposed design, and the requirements that apply to your property. An initial review can help determine whether this approach is practical.
Yes, an addition can be designed as an ADU when it forms an independent dwelling unit and meets the applicable requirements. A standard room addition that simply expands the main living area is a different type of project.
Start Planning Your Attached ADU
If you’re looking for an ADU contractor on Mercer Island, tell QH Build what you have in mind. We’ll help you explore how an attached ADU could fit your home and guide you through the next steps in design and construction.