10+ Years of Experience
ADU Builders
Mercer Island
Maksymov Brownstone LLC provides a complete range of services to plan, design and build your accessory dwelling unit in Mercer Island from start to finish. As trusted ADU builders, we focus on smart layouts, quality materials and builds that meet every local code requirement.
Our team acts as your dedicated custom ADU contractor in Mercer Island — delivering attached and internal unit solutions with deep expertise in ADU remodeling and new construction.
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Our Advantages
Why Mercer Island Homeowners Trust Our ADU Building Team
Local Mercer Island ADU Contractor
Our team handles Mercer Island permits and city-specific approvals daily, keeping projects compliant and moving without costly delays.
Upfront Cost Estimate
We break down the full build price before any work begins, so you can plan your budget confidently with no hidden fees.
Organized Project Timeline
From design to final inspection, your Mercer Island ADU stays on schedule through every phase of the build process.
Quality-Built ADU Homes
Every Mercer Island ADU we build uses durable materials and careful workmanship that meets local standards and stands the test of time.
Responsive Client Support
Quick replies and regular updates keep Mercer Island homeowners informed at every stage, from first consultation to final handover.
Proven Mercer Island ADU Builder
Homeowners in Mercer Island choose us for consistent results, completed projects and a track record that speaks for itself.
What We Build
ADU Services in Mercer Island
Homeowners in Mercer Island looking for a trusted ADU builder near me choose a team that understands local site conditions and Mercer Island city code. We deliver new builds and ADU remodels tailored to your specific lot, goals and budget.
Basement Conversion
Transform your underutilized basement into a self-contained ADU — fully legal, permitted, and designed for comfortable living in Mercer Island.
Garage Conversion
Convert your attached or detached garage into a stylish, code-compliant ADU unit in Mercer Island — often the fastest and most cost-effective path.
Attic Conversion
Maximize your Mercer Island home's vertical space with a beautifully finished attic ADU — ideal for rental income or a private guest suite.
Building an ADU in Mercer Island can feel overwhelming
Planning an ADU in Mercer Island comes with its own set of challenges — zoning rules, permits and tight budgets. Many homeowners feel uncertain about where to begin. With experienced accessory dwelling unit builders who know Mercer Island, the path forward becomes much clearer.
Where Do I Even Start?
The Mercer Island ADU process — design, city approvals, construction — can feel impossibly complex for first-time builders.
Hidden Costs
Unexpected fees and vague quotes leave homeowners over budget before construction even begins.
Delays & Unreliable Contractors
Missed deadlines and poor coordination drag projects on for years — costing time and money.
Lack of Clear Communication
Homeowners are often left in the dark, unsure of progress or next steps on their project.
Turning Mercer Island property potential into real, lasting rental income.
Client Reviews
What Our Clients Say
"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 attention to detail. Every concern we raised was addressed promptly, and the final result exceeded our expectations. Our new ADU looks incredible and was delivered exactly on time."
Jenny Lian
2 weeks ago
Portfolio
Recent ADU Projects in Mercer Island
University District Seattle Kitchen Renovation
How It Works
Our Process
Consultation & Estimate
Free site visit — we assess feasibility, zoning, and costs with zero commitment.
Design & Planning
In-house design team creates layouts tailored to your goals and budget.
Permitting & Approvals
We handle all municipal applications and follow up proactively through review.
Construction Phase
Our crews manage every trade — framing, MEP, finishes, and exterior work.
Final Delivery
City inspections coordinated and CO obtained. Your ADU is ready to occupy.
Consultation & Estimate
Free site visit — we assess feasibility, zoning, and costs with zero commitment.
Design & Planning
In-house design team creates layouts tailored to your goals and budget.
Permitting & Approvals
We handle all municipal applications and follow up proactively through review.
Construction Phase
Our crews manage every trade — framing, MEP, finishes, and exterior work.
Final Delivery
City inspections coordinated and CO obtained. Your ADU is ready to occupy.
About Us
Trusted ADU Builders in Mercer Island
Maksymov Brownstone is a family-owned ADU builder Mercer Island homeowners rely on for reliable work and lasting results. With 10+ years of hands-on experience, we handle custom ADU construction that fits your Mercer Island property and meets all local codes.
We guide you through every stage — from early planning through final city approval. As a licensed and bonded team, we deliver clear communication, a compliant build process and results built for long-term value. Your Mercer Island ADU is our priority from start to finish.
Return on Investment
Why an ADU Is a Smart Investment in Mercer Island
Rental Income
In Mercer Island, a well-built ADU can generate $1,800–$3,200 per month. This consistent income helps offset the initial build cost, making your project financially sound over time.
Increase Property Value
Adding a permitted unit in Mercer Island can raise your home's value by $150,000–$300,000. With skilled accessory dwelling unit builders, this becomes a strong long-term gain.
Flexible Living Space
Build extra space for aging parents, adult children or a private office in Mercer Island. These custom homes on your property offer flexibility while keeping full ownership.
FAQ
Frequently Asked Questions About ADU Remodeling in Mercer Island
Planning an ADU project in Mercer Island comes with many questions about permits, timelines and budget. Below we cover the most common concerns homeowners have. Feel free to reach out for a personalized consultation and clear guidance specific to your Mercer Island property.
How much does it cost to build a custom ADU in Mercer Island?
The total cost depends on your custom design, size, layout and finish level. As a trusted ADU builder in Mercer Island, we calculate the full price after a site visit and provide a clear, itemized estimate so you know exactly what to expect before any work begins.
What are the requirements for an accessory dwelling unit in Mercer Island?
Every lot is different. Zoning, access and the current condition of your Mercer Island property all matter. As professional accessory dwelling unit builders, we review your site during the first consultation and explain what's allowed under local ADU rules — no confusion, just clear next steps.
How long does the ADU design and construction process take in Mercer Island?
There's no one-size timeline. Smaller projects move faster, while more complex builds take longer due to permits and inspections. A skilled Mercer Island contractor keeps the design phase organized and prevents delays, so your ADU remodeling project stays on track from start to finish.
Why is it important to hire a local ADU builder near me in Mercer Island?
A team that works in Mercer Island every day knows how to handle permits, inspections and city-specific details. When homeowners look for a reliable builder "near me", choosing a proven Mercer Island ADU builder helps avoid costly mistakes and keeps the entire project moving smoothly.
Ready to Build Your ADU in Mercer Island?
Start with a free consultation — no pressure, just honest answers about your project.
Committed to superior quality and results
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Contact us
maksymov.brownstone@gmail.com
Phone
(425) 800-7663
Mon – Fri
9 am – 6 pm
Saturday
9 am – 1 pm