ADU Construction Mercer Island
Maksymov Brownstone LLC provides ADU construction Mercer Island homeowners can trust for private, well-planned and high-quality living spaces. From detached guest suites to attached accessory dwelling units, we design and build ADUs around your property, lifestyle, views, privacy needs and local permit requirements. Schedule a free consultation to discuss your project.
Leave a requestPrivate ADU solutions for Mercer Island homes
Mercer Island ADU construction is often about more than adding square footage. For many homeowners, an ADU creates a refined guest suite, a private space for relatives, a quiet home office, a caregiver unit or a flexible living area that supports the property’s long-term value.
Mercer Island has a unique residential setting between Seattle and Bellevue, with waterfront homes, hillside properties, Mid-Century residences and contemporary luxury estates. Because many lots are shaped by slopes, trees, lake proximity or view corridors, every ADU needs careful planning before design and construction begin.
Custom ADU design and construction
As an ADU contractor Mercer Island homeowners can work with from concept to completion, Maksymov Brownstone LLC manages the process with clear communication, quality craftsmanship and professional project management. We help coordinate layout planning, structural work, utility connections, insulation, windows, plumbing, electrical systems, flooring, cabinetry, lighting and interior finishes.
Our team builds attached ADUs, detached ADUs, guest suites, garage conversions and compact independent living spaces. Each project is planned around access, privacy, natural light, energy efficiency, exterior appearance and how the new unit relates to the main home.
ADU construction options tailored to your property
Basement conversion
A basement conversion transforms existing lower-level space into a fully functional living unit with a private entrance, bathroom, kitchenette and living area.
Using the current structure reduces costs while improving moisture control, ceiling height, lighting, insulation, HVAC, plumbing and electrical systems.
This option works well for rental income, extended family, or long-term guest stays.
Garage conversion
Garage conversions turn underutilized garage space into comfortable living quarters, including 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 versatile everyday use.
Attic conversion
Attic conversions create private upper-level living space with a bedroom, bathroom, kitchenette and lounge. 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, ideal for guests, teenagers, home offices or rental income.
Built around Island lots, views and privacy
ADU construction Mercer Island WA requires a property-specific approach. A hillside lot may need careful access planning, drainage review and foundation strategy. A waterfront or near-shoreline property may require additional attention to setbacks, exterior materials, stormwater control and environmental requirements. For homes near Lake Washington, the design should respect both the setting and the architecture of the main residence. An ADU should not feel like a random addition.
It should support the property’s character, protect privacy between living spaces and use premium materials that match the expectations of Mercer Island homeowners.
Many ADU projects here are designed for high-net-worth families, executives, tech leadership and homeowners who value privacy, top schools and long-term property performance. Maksymov Brownstone LLC focuses on practical planning, refined finishes and durable construction that fits this level of expectation.
Mercer Island ADU planning and permit process
Building an ADU on Mercer Island often involves more review than a standard remodel. Maksymov Brownstone LLC helps organize the process so homeowners understand design steps, budget factors, code requirements and construction timing before work begins.
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01
Property feasibility review
We begin by reviewing your property, goals and intended ADU use. The team considers lot shape, slopes, shoreline proximity, trees, access, privacy, utilities, existing structures and possible locations for the new living space.
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02
Concept and layout planning
Next, we develop a layout that supports daily comfort and long-term use. This may include a sleeping area, bathroom, kitchenette or kitchen, storage, windows, lighting, private entrance and outdoor connection.
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Materials, scope and budget
You receive a clear project scope with material options, construction stages, budget expectations and estimated timeline. We explain possible cost factors, including site conditions, foundation needs, utility upgrades, finish level and permit complexity.
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Permit coordination
Maksymov Brownstone LLC helps coordinate ADU permits Mercer Island projects may require. Depending on the lot, this may include building review, structural details, tree-related documentation, Critical Areas review, shoreline considerations or additional environmental steps.
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Construction management
Construction may include site preparation, framing, foundation work, structural upgrades, utility connections, insulation, drywall, flooring, tile, cabinetry, fixtures and exterior finishes. We keep communication organized throughout the build.
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Final walkthrough and quality review
Before completion, we perform a detailed walkthrough, review finish details and address punch-list items. The finished ADU is checked for comfort, function, durability and alignment with the original design goals.
More ways we can transform your home
If you are looking for creative ways to remodel your home, we provide free consultations to help you start your next project in Mercer Island.
What our customers say
Where we offer ADU 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 ADU 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
These answers cover common questions about ADU construction on Mercer Island. For exact recommendations, cost details, permit requirements or design ideas, Maksymov Brownstone LLC can review your property and help define the next step.