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ADU contractor in Seattle

Maksymov Brownstone LLC provides expert ADU construction services in Seattle, creating code-compliant units that maximize both property value and living space.

From the initial design to the finished space, we work closely with homeowners to ensure each ADU is functional, beautiful and truly reflective of their unique needs.

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Transform your home with ADU solutions

At MB Remodels, ADU construction is designed to make everyday living more flexible, comfortable and valuable. An accessory dwelling unit allows homeowners in Seattle to expand their living space, increase property value and adapt their homes to modern needs.

An ADU can provide a private space for family members, generate steady rental income or serve as a quiet and functional home office: all without the need to move. It is a smart investment that combines thoughtful design, functionality and sustainability.

With extensive experience in local permits, zoning rules and efficient construction, MB Remodels manages every step of the process, ensuring a smooth, stress-free experience from concept to completion.

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Expand your living possibilities

MB Remodels provides full-service ADU construction, guiding homeowners through every stage of the process from early planning and design to permits and final building. Each project is carefully managed to ensure clear communication, efficient scheduling and high-quality craftsmanship.

Strong local expertise allows all work to fully comply with Seattle regulations, helping avoid delays and complications. This thoughtful, well-structured approach ensures a smooth experience and reliable results, creating comfortable and functional living spaces that are completed on time and built to last.

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ADU construction options tailored to your property

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Basement conversion

Basement conversion turns existing lower-level space into a fully functional living unit with a private entrance, bathroom, kitchenette and living area.

Using the current structure helps reduce costs while improving moisture control, ceiling height, lighting, insulation, HVAC, plumbing and electrical systems. This option works well for rental income, extended family living or long-term guest stays.

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Garage conversion

Garage conversion transforms underused garage space into comfortable living quarters that include a bedroom, bathroom, kitchen and living area.

This solution adds valuable square footage without expanding the home’s footprint while upgrading insulation, windows, flooring, utilities, climate control and modern finishes for flexible everyday use.

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Attic conversion

Attic conversion creates a private upper-level living space with a bedroom, bathroom, kitchenette and lounge area.

Structural upgrades, dormers, stair access, insulation, ventilation, skylights, HVAC integration and plumbing allow homeowners to gain extra living space while preserving yard and garage areas, making it ideal for guests, teenagers, home offices or rental use.

Explore attic conversion service

Maximize your home’s potential with custom ADUs

An ADU is not just an opportunity to enhance the value of your rental property. It’s a great opportunity to get the most out of your home equity while supporting your family’s longevity in a single place or offering new financial freedoms.

MB Remodels LLC delivers custom-designed ADUs that combine contemporary architecture, ergonomic solutions, functional layouts and high-quality materials.

Our portfolio includes a broad range of completed projects. Each construction project is tailored to the homeowner’s lifestyle and property layout while maximizing space, comfort and functional harmony.

Our team of professionals pays attention to detail, providing project management and seamless execution from design to completion. ADU projects represent diverse styles and real-life results, showcasing MB Remodels’ versatility, individual approach and commitment to excellence.

ADU construction roadmap

The MB Remodels accessory dwelling unit builder follows a structured, step-by-step approach to ensure every ADU builder is completed on time, within budget and to the highest standards. Among the benefits offered by our professional team are quality control and client communication at each stage. Look through all the stages of our workflow to turn your ideas into a life.

  • 01

    Consultation & project estimate

    At the initial stage of the creation process, our team evaluates the property, inspects zoning requirements and listens to the client’s goals. We provide personal free consultation, accurate site analysis and clear communication to define the best ADU options and deliver a transparent project estimate.

  • 02

    Design & planning

    MB Remodels’ design team creates custom ADU plans that align with the client’s lifestyle, property layout and budget. While designing each project, we offer creativity, functionality and attention to detail. At the planning stage, we showcase 3D design, select materials according to our customers’ preferences and collaborate on planning to achieve the ideal design outcome.

  • 03

    Permitting & approvals

    Our remodeling company handles all paperwork, permits and city approvals, ensuring full compliance with Seattle’s regulations. We have a lot of experience with local codes and efficient coordination with authorities. We do our best to save clients time and stress during this complex step.

  • 04

    Construction phase

    MB Remodels’ high-skilled builders manage the full construction process, starting from foundation to final finishes. Our team can boast high craftsmanship, adherence to timelines and transparent progress updates. We use premium materials, follow safety standards and ensure precise execution.

  • 05

    Final walkthrough

    At the final stage of the project, MB Remodels conducts a detailed walkthrough with the client to inspect every aspect of the completed ADU. We prioritize client satisfaction, ensuring quality verification and readiness for immediate use. Our team showcases commitment to excellence and the trust among our customers, thanks to a wide range of previously successful projects.

Custom ADUs created with precision, integrity and design that elevate every home
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More ways we can transform your home

Mbremodels provides a range of complementary home renovation services beyond an ADU builder, including basement remodeling, attic conversion, garage conversion and others.

We offer versatility, consistency in quality and the convenience of working with one trusted team for all renovation needs. Looking for the most creative solutions to remodel your home space? We are ready to provide you with a free consultation to start your next home improvement project.
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5 average (9 reviews)

What our customers say

J
J Jenny Lian
2 months ago

I recently had the pleasure of working with Ihor on a remodeling project for my home, and I couldn't be happier with the results. From start to finish, Ihor demonstrated exceptional professionalism, skill, and dedication.

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J John Nye
2 months ago

This company is amazing. Their team of specialists at remodeling proved to be hard working, determined and perfectionists. The assessment of needs was simple and the quote was more reasonable than expected, and the final invoice had no surprises. There are no risks in engaging this company.

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S Soledad Guerrero
2 months ago

The experience was so positive that we’re already thinking ahead to our next project with them: remodeling all of our bathrooms. Knowing how dedicated they are to their craft gives us complete confidence in choosing them again.

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A Amy Zier
1 week ago

They did an excellent job on my bathroom! Detailed work and calculated everything before cutting. Highly recommend!

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B Ben Johnson
1 week ago

Ihor and his team have done work all throughout our house and always provide professional and fair service. I appreciate that they take the time to make sure the work is done right. Use them for your next project!

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D Diana Pollock
1 week ago

Ihor and his team are AMAZING!!! Does awesome work, very responsive, and always has great solutions. Highly recommend!

M
M Marta Stashevska
1 week ago

Fast and reliable service. Flooring look amazing. They know what they’re doing, they recommend materials, and always answer questions.

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S Sergei Fadeev
1 week ago

Ihor and his crew did amazing work on our kitchen. Everything turned out great. We got 100+ sqf addition so now our kitchen is bigger than before. Also they made this custom cabinets. Highly recommended!

Y
Y Yauhen Soladau
1 week ago

Good company, thanks for your work. I will be recommend this company to my friends.

Gallery MBR
Gallery

Here are some photos of the projects to inspire and help you create your own project. If you are looking for ideas, you're in the right spot!

Portfolio MBR
Portfolio

Visit our portfolio to explore our work and gather inspiration and ideas for your projects.

Ideas and inspiration by Maksymov Brownstone

ADU vs DADU: maximizing your property potential
ADU/DADU
Apr 6, 2026
ADU vs DADU: maximizing your property potential

As demand rises, understanding DADU vs ADU becomes key for making the right investment decision.

Frequently asked questions

In this section, you will get answers to the most common questions clients ask about ADU builder services. You are welcome to contact our customer support for additional information.

Do I need permits to build an ADU in Seattle?

Yes, all ADUs in Seattle require proper permits, including building, electrical, plumbing and sometimes zoning approvals. Current regulations define size limits, setback distances, height restrictions, lot coverage, parking requirements and utility connections. Rules may vary across cities such as Seattle, Bellevue and Kirkland, making local expertise essential.

MB Remodels manages the entire permitting process, from documentation and city coordination to inspections. Staying up to date with evolving ADU regulations, the team ensures a smooth, compliant and stress-free experience for homeowners.

Are your projects insured and do you offer warranties?

MB Remodels is fully licensed and insured, providing customers with complete peace of mind. All work is backed by warranties covering materials and craftsmanship, ensuring long-term reliability and customer protection.

How can I get started with my project?

Initially, take the first step by scheduling a free consultation. The MB Remodels team will discuss your ideas, timeline and budget while providing expert guidance. Start the ADU journey with a free consultation from our ADU experts by filling out the form.

How long does it take to build an ADU in Seattle?

Most ADU projects take between 7 and 14 months from initial planning to final occupancy.

Design and permitting typically require 3 to 6 months while construction takes around 4 to 8 months. The timeline depends on ADU type, permit approval speed, weather conditions and project complexity.

Permit processing is often the longest stage. MB Remodels prioritizes efficiency, clear communication and realistic scheduling with experience in expediting permits whenever possible to keep projects moving forward.

Does your company help with ADU design and plans?

MB Remodels provides complete design and planning services in-house. We strive to customize layouts that match the client’s needs and comply with Seattle codes. Our team of professionals provides our customers with full-scale expertise in managing every step, starting from concept and permits to ready-to-build plans.