When You Need More

ADU & DADU Build Services

Expand your space and maximize your property's potential with a ADU or DADU built by Makswell Construction. ADU's are perfect for increasing your home value and generating rental income. Serving Seattle and the Eastside.

Let In the Guests and Tenants

Perfect for tenants or guests while maintaining your privacy and peace of mind. Depending on available your needs and existing space, accessory dwelling units (ADU) can be dedtached (DADU) or attached (AADU). Schedule a consult with Makswell to know what ADU is right for you.

Benefits of an ADU

Proven Results

Private Space
Give your guests and tenants privacy by allowing them to stay in their own private space.
Generate Rental Income
Increase your property value and generate an income stream with an attached or detached ADU.
Multi Use
Multigenerational living, home office, and a recreational den, these are just a few ways ADUs can be utilized.

ADUs Done Better

Discover the Makswell Difference

See what makes us the right choice for your ADU build.

Built to Any Spec
Full Service Construction
Our project managers will oversee the entirety of the project from foundation to finish.
Affordale solution
Within Your Budget
Concerned that expanding your existing home with an AADU or building a DADU will be expensive? We can help you pick a cost efficient pre-approved design. For custom designs, we'll help you partner with an architecht that understands your budget.
Pros Only
Experienced Craftsmen
Years of experience and passion, made obvious in every project. Our team and specialty contrators consistently deliver professional results every time.
You'll Love It
Satisfaction Guaranteed
If something's not right, we'll fix it. Change your mind on something? Just let us know! We're fully commited to ensure you're happy with your new space.

Our Process

1. Project Discovery
Contact Us
Send us an email on our contact page with your project details. We’ll schedule a call to get to know you and the scope of the project.
2. On-Site Meeting
First Walk Through
Next, we’ll do an on-site walk to discover any important details with the existing space. During this time we may discover any constraints and possibilities before estimation.
3. Choose a Designer
Partnering for Success
We strongly recommend onboarding an interior designer from our network or bringing your own. A design partner is critical in making sure you’re satisfied with the look of your new space before and after it’s built. Certain remodels and custom home projects may additionally require an architect and engineer.
4. An Estimate and Signed Contract
Understanding Costs and Agreements
An estimate will be provided based on plans created by the designer and others involved. A signed contract will follow.
5. Permitting
Getting the Green Light
Permits will be applied for using created plans. Materials are obtained in the meanwhile.
6. Construction Phase
Demo and Build
The existing space will be carefully town down. During demolition, our crew is mindful of the rest of the house, using air scrubbers and zip walls barriers to combat dust and cleaning project areas daily. Various inspections may be done throughout the project to ensure the work is done to code.
7. Project Completion
Making It Perfect
Final project walks and inspections take place. Any remediations are completed. Your new space is ready for you to enjoy!