- Seattle’s Award-Winning Home Remodeling Contractor
Since 2009, Renovate Builders has completed over 1,000 ADU projects throughout Maple Valley, bringing specialized expertise to residential accessory dwelling units. Each build meets current code requirements and is constructed to perform reliably for years. The team handles the full scope – from initial design through final completion – ensuring homeowners end up with a practical, compliant living space that fits their property and budget.
Maple Valley’s housing shortage has created real demand for creative solutions. Adding an accessory dwelling unit to your property can transform underutilized land into functional living space while addressing local density needs.
Renovate Builders has spent 15 years developing ADUs across Washington. Our portfolio includes over 1,000 completed projects, giving us direct experience with Maple Valley’s specific zoning requirements, soil conditions, and utility infrastructure. What sets our approach apart is handling every phase in-house through a team of 25 local specialists. That means consistent quality from initial site assessment through final inspections.
The process involves more than construction. We navigate city permits, coordinate with water and power utilities, manage design iterations based on your budget and lot constraints, and ensure everything complies with current building codes. Rather than outsourcing portions of your project to different contractors, our integrated team maintains accountability and streamlines communication from start to finish.
Whether you’re planning a rental unit, guest house, or income property, we’ll evaluate your site’s potential and walk you through what’s realistic for your lot size, setbacks, and local regulations. If an ADU makes sense for your situation, we’ll handle the details so you don’t have to juggle multiple vendors or worry about coordination gaps.
Let us show you what’s possible with your property.
Building an ADU in Maple Valley, WA requires balancing three competing priorities: keeping costs reasonable, maintaining genuine quality, and staying on schedule. Renovate Builders handles all three without cutting corners on materials or craftsmanship. We source durable, weather-resistant materials built to handle the Pacific Northwest climate. Whether you’re planning a backyard cottage, converting a garage into living space, or finishing a basement unit, the work meets local code requirements and positions your property for strong rental income, family flexibility, or future sale value. Every project is engineered for maximum return. That means smart layouts, efficient construction timelines, and finishes that work harder for your investment.
Detached ADUs are small, independent units built separately from the main home and are also called “backyard cottages”. Have an underused backyard space? You can make it useful through long-term rentals or multigenerational living with the help of detached ADUs. Call us for site planning, custom design, permitting, and full build.
Attached ADUs share at least one wall or structural component with the main home. We also call them home extensions or garage ADUs, as they are usually built over garages or as side additions. Need a space for in-law suites or flexible rental space with shared utilities? This option is for you that adds luxury and comfort to your lifestyle.
Conversion ADUs are garage or basement conversions. We use existing square footage, like basements, attics, or garages, and transform them into livable units. This option is best for fast turnaround and lower cost-per-square-foot, making it ideal for short-term rental or guest suites.
Renovate Builders constructs detached ADUs across Maple Valley that work within local zoning while making full use of what your property can offer. Whether you’re building a studio, one-bedroom, or two-bedroom unit, we handle the design and permitting to match the code requirements specific to your lot.
These standalone structures work equally well for short-term rental income, permanent tenants, or extended family living arrangements. Each unit includes a complete kitchen, dedicated bathroom, and energy-efficient construction that keeps utility costs down and resale appeal up.
The flexibility matters. An ADU can shift purposes as your needs change – from guest house to income property to multigenerational space. We build them to last, with materials and systems that hold their value and perform reliably over time.
From initial planning through final inspection, Renovate Builders manages the entire process. We know Maple Valley’s requirements and work with local permitting to keep projects on track without surprises.
Our garage conversion service transforms an underused space into a legal, livable unit. We handle structural retrofitting, insulation, plumbing, and electrical upgrades. Need home offices, rental units, or guest quarters? Garage conversion is your best cost-effective alternative to new builds. Increase usable square footage and get a strong ROI without expanding outward.
Expand your home’s square footage without moving, with our room addition services. Add bedrooms, bathrooms, family rooms, gyms, or office space for your growing family or simple lifestyle upgrade. Our team makes sure that all additions match the existing structure and architecture. Let us help you boost appraisal value and functionality in residential zones.
Second-story additions are perfect for homeowners needing more space without sacrificing yard area. We build up, adding full floors or partial pop-tops to maximize views and living space. This is ideal for land-locked Maple Valley WA neighborhoods, delivering a major property value increase while supporting long-term living without relocating.
For added privacy and flexibility, backyard cottages in Maple Valley WA are a popular choice. These detached living units, also called DADUs or sometimes referred to as in-law suites (when used for extended family housing). Our team completes them with kitchens, bathrooms, and private entrances. Highly useful for families with aging parents, adult children, or renters. Enjoy living independently while increasing property value and long-term rental income.
ADUs generate consistent passive income through short- or long-term rentals. It’s one of the lowest-barrier ways to invest in real estate without buying a second property or moving out.
And if you do relocate, it’s known that Maple Valley WA homes with ADUs consistently sell for more. Buyers value extra rentable space, which means your property stands out in listings.
Adding an ADU gives your property long-term flexibility. Enjoy a livable space for aging parents, adult kids, or a future home office. It adapts to your lifestyle while preserving privacy and personal space.
We evaluate your lot for zoning, access, and size constraints before beginning any design or permitting process.
Our in-house team develops detailed drawings optimized for layout, light, and utility performance before submitting permit applications.
Once approved, our crew begins excavation, foundation, framing, and finishes. You’ll get a fully permitted, move-in-ready ADU or DADU.
Whether you want premium finishes or need a cheap, affordable option, we offer scalable design-build solutions without sacrificing quality. From zoning headaches to DADU footings, we solve it, manage it, and finish it, because that’s what the best ADU builders Maple Valley WA should do.
ADU costs range from $100,000 to $350,000+, but the exact price depends on the size, layout, location, and type (like garage conversion or detached unit). Call us for a custom quote!
Yes. Bellevue WA allows long-term and short-term ADU rentals with some occupancy and licensing rules.
Most ADUs or home additions take about 3 to 6 months to finish. We give you a timeline upfront.
Absolutely. We manage trenching, utility hookups, foundation pouring, and all required inspections.
Most online DIY advice won’t work, since ADUs/DADUs involve permits in Seattle. The best option is working with a licensed contractor, so start by reaching out to us.
General Contractor Serving Seattle and Surrounding Areas
