Maksymov Brownstone LLC

Seattle DADU construction services

DADUs (Detached Accessory Dwelling Units) are increasingly popular due to their versatility, offering homeowners a range of benefits. This unit adds property value, creates flexible living or rental spaces and reflects modern design and sustainability. Maksymov Brownstone LLC designs and builds custom DADUs across Seattle, Kirkland, Bellevue, Redmond, Bothell and the Greater Seattle Area — handling permits, zoning and construction in-house with no subcontractors. Free estimate to get started

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Why choose DADUs for comfortable living

Homeowners in Seattle choose to build DADUs because of a desire to create an independent, flexible living space for the family, generate rental income and increase property value. DADUs are a smart, flexible and sustainable housing solution that fits urban zoning regulations in Seattle. By ordering DADU building services from our team, you gain practicality and lifestyle improvements while we manage every stage, including permits and construction.

Rules and size limits vary across Seattle, Kirkland, Bellevue, Redmond and Bothell — our team knows the specifics of each city and verifies your parcel eligibility before any commitment.

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Tailored DADUs for your home

A DADU stands for Detached Accessory Dwelling Unit. It is a separate, stand-alone residential structure built on the same lot as an existing single-family home. Unlike an attached ADU or an interior conversion (like a basement ADU), a DADU is fully independent and does not share walls with the primary house.

Maksymov Brownstone LLC DADU builder in Seattle provides full-scale DADU construction solutions, starting from design, permitting and site preparation to high-quality building and finishing. Our team handles design, permits and construction entirely in-house — no subcontractors, one team, one point of accountability from first consultation to final inspection.

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Dadu kitchen

Exceptional DADU designs built with precision

Maksymov Brownstone LLC DADU builder delivers custom detached accessory dwelling units, from thoughtful design through expert building and finishing. The company offers tailored solutions that combine smart layouts, contemporary aesthetics and sustainability.

In our arsenal of completed projects are backyard cottages, guest houses and rental units. Our team can boast of high craftsmanship, attention to detail and adherence to Seattle codes. We bring reliable and innovative solutions into reality, showing how each DADU enhances both property potential and lifestyle.

Our expert team specializes in DADU building, providing you with additional living space and rental income. Moreover, remodeling your existing structure is another area of our expertise, transforming homes and commercial spaces into functional and aesthetically pleasing spaces.

We are ready to turn your vision into reality with top-grade craftsmanship. By choosing Maksymov Brownstone LLC you’re making a smart investment in your property, increasing its value and enjoying the convenience and financial benefits of a functional living space.

Our DADU construction roadmap

Dive into a step-by-step DADU construction process from initial consultation to final delivery. We guide clients through each construction stage.

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  • 01

    Consultation & planning

    Maksymov Brownstone LLC starts the planning process by understanding the homeowner’s goals, evaluating the property and defining project scope, ensuring a design that fits your space, budget and lifestyle needs.

  • 02

    Design stage

    At this stage, the design team creates detailed plans that combine style, function and code compliance. We offer a collaborative approach that brings the homeowner’s vision to life with precision and creativity.

  • 03

    Documentation & approval

    Maksymov Brownstone LLC obtains all required permits and city approvals in accordance with Seattle’s land-use and zoning regulations for accessory dwelling units. We remove complexity for the client and ensure a smooth, compliant project start.

  • 04

    Construction & completion

    At this stage, we provide our customers with expert craftsmanship, quality materials and efficient project management. Our team of professionals maintains transparency and care through every construction stage until completion.

  • 05

    Final walkthrough & warranty

    Before handing over the keys, we conduct a detailed walkthrough with you to review every element of the completed DADU — finishes, systems, fixtures and site conditions. Any final adjustments are addressed before sign-off. Every project includes full warranty coverage on materials and craftsmanship, giving you long-term confidence in your investment.

High-quality DADUs built with innovation, integrity and craftsmanship you can trust
We do more than just DADU construction

We do more than just DADU construction

Maksymov Brownstone LLC provides a range of complementary services for homeowners who want to maximize their property — including ADU construction for attached and interior units, home additions when a DADU isn't the right fit for your lot, and full-home renovations. Contact us for a free consultation to find the best solution for your property.


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5 average (6 reviews)

What our customers say

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J Jenny Lian
5 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
5 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
5 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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J Jerry Bane
2 months ago

After researching DADU builders in the Seattle area for months, we chose Maksymov Brownstone based on their detailed proposal and transparent pricing. They built our detached unit in Bothell on time and within budget. It's been rented out since completion and pays for itself. What stood out was that they managed permits, zoning and construction all in one team — no subcontractors, no surprises.

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S Stacy Wayne
2 months ago

We wanted a detached guest house for my parents in our backyard in Redmond. Maksymov Brownstone walked us through the design from scratch — layouts, materials, compliance with Seattle codes — and delivered a beautiful 650 sq ft unit. The team was responsive throughout and the quality of finishes exceeded our expectations. Will definitely use them again for future projects.

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J Joe Peterson
2 months ago

We hired Maksymov Brownstone to build a backyard DADU on our Kirkland property. The permitting process alone felt overwhelming, but Ihor's team handled everything — city coordination, documentation, approvals — without us having to chase a single paper. Construction wrapped up in about 6 months and the finished unit is exactly what we envisioned. We're now renting it out and it's already generating income. Highly recommend.

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Gallery

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Portfolio

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

areas Seattle

Where we offer DADU construction

Our company can boast a high level of expertise in the building and remodeling industry while delivering high-quality services to our customers. Maksymov Brownstone LLC pays close attention to every detail of your DADU construction project, ensuring you’re more than satisfied with the final result. See all cities we serve across the Greater Seattle Area:

Frequently asked questions about DADU construction in Seattle

Have questions about building a detached ADU in the Greater Seattle Area? Here are the most common things homeowners ask before starting.

How much does it cost to build a DADU?

DADU construction in the Seattle area typically runs $180,000–$400,000+ depending on size, design complexity, site conditions and finishes. A compact 400–500 sq ft backyard cottage sits at the lower end; a fully custom 800–1,000 sq ft unit with premium finishes sits at the higher end. These ranges reflect Seattle's current labor and material costs. Permit fees, utility connections and site preparation add to the total. Maksymov Brownstone provides a detailed itemized estimate at no charge — contact us to get started.

How long does it take to build a DADU?

A DADU project typically takes 9–14 months from first consultation to move-in. Design and permitting take 3–6 months — permit review by Seattle SDCI is often the longest stage. Construction runs 4–8 months depending on size and complexity. Maksymov Brownstone manages every stage and prioritizes efficient scheduling to keep projects moving forward.

How many ADUs can I build on my lot in Seattle?

Under Washington State HB 1337, most Seattle-area homeowners with a single-family lot can now build up to two ADUs — for example, one attached ADU (basement or garage conversion) and one detached DADU in the backyard. This is a significant change from previous rules that limited most lots to one unit. Specific setback, height and lot coverage rules still apply and vary by city. Maksymov Brownstone verifies your parcel eligibility as part of the initial consultation.

How do I know if I'm zoned for a DADU?

Zoning eligibility depends on your lot size, zone designation and local overlay rules. Seattle and surrounding cities — Kirkland, Bellevue, Redmond, Bothell — each have specific setback requirements, height limits and coverage maximums that determine what's buildable on your property. Our team reviews your parcel and current zoning code at the start of every project and guides you through what's possible before any money is committed.

How many square feet can my DADU be?

In the Seattle area, a DADU can typically be up to 1,000 sq ft, though the practical maximum depends on your lot size, setback requirements and local height limits. Some cities allow slightly larger units in certain zones. Maksymov Brownstone designs each DADU to maximize the allowable footprint while meeting all code requirements.

Can a DADU be rented out?

Yes. A DADU can be rented as a long-term rental or, in many Seattle-area cities, as a short-term rental subject to local licensing requirements. It must meet all building codes, pass final inspections and have proper utility connections before occupancy. Every DADU Maksymov Brownstone builds is fully permitted and inspection-ready for legal use as a rental from day one.

What is the difference between an ADU and a DADU?

An ADU (Accessory Dwelling Unit) is built within or attached to the existing home — such as a basement conversion, garage conversion or interior unit. A DADU (Detached Accessory Dwelling Unit) is a fully separate, standalone structure on the same lot. DADUs offer more privacy and flexibility but typically cost more and require more permitting. We covered the full comparison in our guide — ADU vs DADU: maximizing your property potential.