10+ Years of Experience
ADU Builders
Renton
Maksymov Brownstone LLC is the ADU builder Renton homeowners call when the lot is tricky and the plan has to work the first time.
We design and build attached ADUs and backyard cottages with a clear eye on layout, access, and code.
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Our Expertise
Expert ADU Builder in Renton: Maximize Your Property
An ADU in Renton can do two jobs at once: create rental income and solve a family housing problem without forcing a move. On some properties, a detached unit is the cleanest path. On others, a garage or basement conversion wins on cost. The city also offers a Permit Ready ADU path with pre-approved plans, which can shorten design time on the right lot. But that only helps if the site really fits. Steep grades, utility routing, setbacks, and critical-area flags are where budgets break.
What We Build in Renton
- 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 Renton Homeowners Trust Our ADU Building Team
Local Renton ADU Contractor
Our team handles Renton 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 Renton ADU stays on schedule through every phase of the build process.
Quality-Built ADU Homes
Every Renton 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 Renton homeowners informed at every stage, from first consultation to final handover.
Proven Renton ADU Builder
Homeowners in Renton choose us for consistent results, completed projects and a track record that speaks for itself.
Building an ADU in Renton can feel overwhelming
Planning an ADU in Renton 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 Renton, the path forward becomes much clearer.
Where Do I Even Start?
The Renton 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.
One reliable team handling every stage of your Renton ADU project.
What We Build
ADU Services in Renton
Homeowners in Renton looking for a trusted ADU builder near me choose a team that understands local site conditions and Renton 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 Renton.
Garage Conversion
Convert your attached or detached garage into a stylish, code-compliant ADU unit in Renton — often the fastest and most cost-effective path.
Attic Conversion
Maximize your Renton home's vertical space with a beautifully finished attic ADU — ideal for rental income or a private guest suite.
Portfolio
Recent ADU Projects in Renton
University District Seattle Kitchen Renovation
How It Works
Our Process
Site Assessment
We review lot size, setbacks, access, utilities, and Renton zoning to see whether your property fits a detached ADU, attached unit, or conversion.
Custom Design
Then we create blueprints that match the main house, solve circulation, and make the new unit feel intentional instead of dropped onto the lot.
Permitting
We handle Renton permit submittals, city comments, and supporting documents, including extra studies when the site triggers slope, creek, or wetland review.
Construction
From foundation to framing to final finishes, our crew builds the ADU with clean sequencing, solid materials, and close attention to utility tie-ins.
Turnkey Delivery
After inspections pass, we finish the details and hand over a completed ADU ready for family use, guests, or long-term rental.
Site Assessment
We review lot size, setbacks, access, utilities, and Renton zoning to see whether your property fits a detached ADU, attached unit, or conversion.
Custom Design
Then we create blueprints that match the main house, solve circulation, and make the new unit feel intentional instead of dropped onto the lot.
Permitting
We handle Renton permit submittals, city comments, and supporting documents, including extra studies when the site triggers slope, creek, or wetland review.
Construction
From foundation to framing to final finishes, our crew builds the ADU with clean sequencing, solid materials, and close attention to utility tie-ins.
Turnkey Delivery
After inspections pass, we finish the details and hand over a completed ADU ready for family use, guests, or long-term rental.
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
About Us
Renton's Leading Custom ADU Builders
Maksymov Brownstone LLC brings 17+ years of hands-on construction experience to ADU work in Renton. That matters here. Some lots look straightforward until grade changes, drainage, or utility access get pulled into the permit set.
Others need added review because they sit near creeks, wetlands, steep slopes, or coal mine hazard areas. We know how to spot those issues early and design around them before they turn into delay. As a licensed and bonded team, we handle detached cottages, attached units, garage conversions, and structural tie-ins that feel like part of the original house.
Where We Work
Serving Renton and Surrounding Areas
We serve homeowners across King County. Based in Seattle, with projects completed throughout the greater metro area.
Return on Investment
Why an ADU Is a Smart Investment in Renton
Rental Income
In Renton, 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 Renton 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 Renton. These custom homes on your property offer flexibility while keeping full ownership.
FAQ
Frequently Asked Questions About ADU Remodeling in Renton
Planning an ADU project in Renton 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 Renton property.
How much does it cost to build an ADU?
The final cost depends on unit size, site work, utility connections, and interior finish level. A detached backyard build usually costs more than a garage conversion or a basement conversion. The lot matters more than most people expect. We provide a clear estimate based on actual scope, not generic online numbers.
Can I build an ADU on my specific lot?
Maybe, but we do not answer that from a satellite image. We check setbacks, access, lot coverage, utility tie-ins, and whether the property has slope or environmental constraints.
Why choose our company as your ADU builder?
Because ADU projects break down when design, permits, and construction are split between too many hands. We keep the work under one roof, from feasibility to final inspection. That means cleaner communication, fewer revisions, and a finished unit that fits the lot, the code, and the budget better.
Ready to Build Your ADU in Renton?
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