10+ Years of Experience
ADU Builders
Sammamish
Maksymov Brownstone LLC is the ADU builder Sammamish homeowners call when the lot is tight, the slope is real, and the plan has to work before permit review starts.
We design and build custom ADUs that fit the house, the site, and the budget together.
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Our Expertise
Expert ADU Builder in Sammamish: Maximize Your Property
An ADU in Sammamish is one of the smarter ways to add value without overbuilding the main house. It can create rental income, give family their own space, or turn a basement, garage, or addition into housing that actually earns its keep. The city now allows up to two ADUs on lots with a detached single-family residence, which opens more options than many owners expect. But this is where projects fail: streams, wetlands, steep slopes, and geologic hazards can shrink the buildable area fast.
What We Build in Sammamish
- Custom Detached ADUs
- Attached Accessory Dwelling Units
- Garage-to-ADU Conversions
- Basement ADU Apartments
- Multi-Generational Living Suites
- Turnkey ADU Construction
- Custom design for your lot
- Full-service contractor support
Our Advantages
Why Sammamish Homeowners Trust Our ADU Building Team
Local Sammamish ADU Contractor
Our team handles Sammamish 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 Sammamish ADU stays on schedule through every phase of the build process.
Quality-Built ADU Homes
Every Sammamish 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 Sammamish homeowners informed at every stage, from first consultation to final handover.
Proven Sammamish ADU Builder
Homeowners in Sammamish choose us for consistent results, completed projects and a track record that speaks for itself.
What We Build
ADU Services in Sammamish
Homeowners in Sammamish looking for a trusted ADU builder near me choose a team that understands local site conditions and Sammamish 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 Sammamish.
Garage Conversion
Convert your attached or detached garage into a stylish, code-compliant ADU unit in Sammamish — often the fastest and most cost-effective path.
Attic Conversion
Maximize your Sammamish home's vertical space with a beautifully finished attic ADU — ideal for rental income or a private guest suite.
Building an ADU in Sammamish can feel overwhelming
Planning an ADU in Sammamish 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 Sammamish, the path forward becomes much clearer.
Where Do I Even Start?
The Sammamish 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.
Sammamish homeowners trust us to build ADUs that add lasting property value.
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 Sammamish
University District Seattle Kitchen Renovation
How It Works
Our Process
Site Assessment
We review lot size, setbacks, utilities, slope, and site limits first, because in Sammamish the land usually decides the smartest ADU path.
Custom Design
Then we build a layout that fits the existing house, preserves privacy, and works with grade changes instead of pretending every site is flat.
Permitting
We prepare the permit package, coordinate city review, and address concurrency, critical-area, and submittal requirements before they turn into delay.
Construction
From structural work through framing, insulation, utility tie-ins, and finishes, our crew builds the ADU in a tight sequence with close field control.
Turnkey Delivery
After inspections pass, we complete the final details and hand over a finished ADU ready for family use, guests, or long-term rental.
Site Assessment
We review lot size, setbacks, utilities, slope, and site limits first, because in Sammamish the land usually decides the smartest ADU path.
Custom Design
Then we build a layout that fits the existing house, preserves privacy, and works with grade changes instead of pretending every site is flat.
Permitting
We prepare the permit package, coordinate city review, and address concurrency, critical-area, and submittal requirements before they turn into delay.
Construction
From structural work through framing, insulation, utility tie-ins, and finishes, our crew builds the ADU in a tight sequence with close field control.
Turnkey Delivery
After inspections pass, we complete the final details and hand over a finished ADU ready for family use, guests, or long-term rental.
Where We Work
Serving Sammamish and Surrounding Areas
We serve homeowners across King County. Based in Seattle, with projects completed throughout the greater metro area.
About Us
Sammamish's Leading Custom ADU Builders
Maksymov Brownstone LLC brings 17+ years of hands-on construction experience to ADU work, and Sammamish is exactly the kind of market where that matters. A lot may look simple until permit review pulls in wetland buffers, stream setbacks, or slope limits that change the footprint.
Sammamish's current rules allow up to two ADUs on a lot with a detached single-family home, including attached units, detached units, or conversions of existing structures. We are a licensed and bonded team that knows how to build around real site constraints, not just sketch over them.
Return on Investment
Why an ADU Is a Smart Investment in Sammamish
Rental Income
In Sammamish, 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 Sammamish 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 Sammamish. These custom homes on your property offer flexibility while keeping full ownership.
FAQ
Frequently Asked Questions About ADU Remodeling in Sammamish
Planning an ADU project in Sammamish 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 Sammamish property.
How much does it cost to build an ADU?
The cost depends on size, structural work, utility tie-ins, site prep, and finish level. A basement or garage conversion can land lower than a detached build because the shell already exists. In Sammamish, slope work, drainage, and critical-area review can move the number fast. We price from the real property, not online averages.
Do I need permits for an ADU in Sammamish?
Yes. ADU work goes through the city permit process, and depending on the project, the application can involve an addition permit, accessory structure permit, inspections, and concurrency review. If critical areas or buffers are present, the city can also require a Critical Areas Study as part of the submittal.
Can I build an ADU on my specific lot?
Maybe, but we do not guess from parcel photos. We check setbacks, lot layout, utility access, and whether the property is affected by wetlands, streams, groundwater-sensitive areas, landslide risk, or steep slopes. In Sammamish, those constraints can matter more than square footage on paper.
Why choose our company as your ADU builder?
Because ADU projects usually break at the handoff points. Design says one thing, permit review says another, and the field pays for the mismatch. We keep the process under one roof from feasibility through final delivery. That cuts miscommunication, protects the budget, and gives you a better-built result.
Ready to Build Your ADU in Sammamish?
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