Experience the A-Z Construction Difference
Basement Renovation Contractor Serving Seattle
Ready to remodel or finish your basement in Seattle or the Eastside? Let’s get started! At A-Z Construction Solutions, we specialize in turning underused basements into beautiful, functional living areas—from guest suites and home offices to family lounges and in-law suites. Our experienced team works closely with you from start to finish to deliver a finished basement that adds both comfort and long-term value to your home. We’re proud to offer expert craftsmanship, clear communication, and a renovation process that’s as smooth as it is efficient.
Curious about what a basement remodel might cost? Head over to our basement pricing page for a full breakdown.
Efficient and Transparent Process
We utilize Buildertrend, the latest remodeling project software, to ensure our clients receive consistent project updates and an easy flow of communication.
Quality and Value
At A-Z Construction, quality is paramount. We use only top-grade materials and workmanship to ensure that your basement not only looks great but lasts a lifetime.
5 Star Customer Service
Your satisfaction is our top priority. That's why we make it our mission to provide 5-star customer service at every stage of your project. From initial consultation to final walkthrough, we're dedicated to exceeding your expectations.
Remodeling Experience & Expertise
Our team comprises talented professionals with 20+ years of experience and expertise in the remodeling industry. They bring creativity, skill, and meticulous attention to detail to every project.
Popular Basement Remodeling Features
Check out the most popular basement remodeling features and start dreaming!
Basement Apartment or ADU
Turn your basement into a self-contained apartment with a private entrance. It's perfect for long-term renters, visiting family, or as a high-demand Airbnb near tech hubs like Bellevue and Seattle.
Home Theater or Media Lounge
Design a cozy, sound-insulated media room ideal for rainy Seattle weekends. Include built-in surround sound, blackout shades, and custom seating for a full cinematic experience.
Children’s Playroom
Create a whimsical and weather-proof play space with built-in storage, chalkboard walls, and imaginative finishes so your kids have a place to play year-round, even when it’s pouring outside.fa
Extra Bedrooms & Bathrooms
Add functional bedrooms and a basement bathroom to accommodate growing families, guests, or tenants. This is a great way to maximize space in Seattle’s tighter housing market.Multigenerational Living Space
Build a comfortable suite for aging parents or extended family with a separate living area, kitchenette, and private bathroom. This works especially well for multigenerational households.
Custom Basement Bar
Install a modern wet bar with custom cabinetry, a beverage fridge, and seating. It’s perfect for entertaining friends during Seahawks or Mariners games.
Tuck-Under Garage (Where Applicable)
In certain Eastside homes with steep lots, a basement-level garage can add major convenience and value. This is especially useful in older Seattle neighborhoods with limited off-street parking.
Optimized Storage Solutions
Turn underutilized basement space into smart storage with built-in shelving, bike racks, ski gear closets, and seasonal organization systems that fit your Northwest lifestyle.
Craft or Hobby Studio
Build out a dedicated space for painting, sewing, woodworking, or music. Include features like task lighting, custom counters, and ventilation to support your creative pursuits.
Game & Rec Room
Create the ultimate entertainment zone with space for pool, ping pong, or video games. This is a great feature for both kids and adults to enjoy, rain or shine.
Dedicated Home Office
Design a quiet, well-lit basement office with modern amenities. It's especially useful for Seattle professionals working remotely in tech, education, or healthcare.
Laundry Room Upgrade
Upgrade from a basic washer and dryer setup to a full-service laundry room with cabinetry, a folding area, utility sink, and sleek finishes.
Wine Cellar or Tasting Room
Design a climate-controlled wine cellar or a Pacific Northwest-inspired tasting space to store and showcase your collection with style.
Reading Nook or Library
Escape the gray with a quiet, light-filled reading nook or a built-in library with bookshelves, warm wood tones, and cozy seating.
Home Fitness Room
Skip the commute and build your own gym. It's ideal for Peloton rides, yoga sessions, or strength training in the comfort of your basement.
Utility & Mechanical Room
Keep your HVAC, water heater, and other mechanicals neatly organized and easy to access with a clean, dedicated utility space.
HOME REMODELING COST GUIDE
For Seattle & the Eastside
Plan your renovation with confidence. See pricing for real projects completed by A-Z Construction Solutions in your area including:
- Kitchen Remodel Pricing
- Bathroom Remodel Pricing
- Home Addition Pricing
- Whole Home Remodel Pricing
- & Other Pricing Details
Our Client Testimonials Speak Volumes
Discover the Possibilities
Seattle Basement Design and Renovation Inspiration
Browse through some of our latest projects to see the quality of our work firsthand and find inspiration for your own Seattle, Eastside or Renton basement renovation.
Experience the A-Z Construction Difference
Start Your Seattle Basement Renovation Today
Take the first step towards your dream basement. Contact us today and discover why homeowners across Seattle, Renton, and the Eastside trust A-Z Construction Solutions with their basement renovations.Serving Seattle, Renton and The Greater Eastside
FAQs About Basement Remodeling
Can I legally turn my Seattle basement into a rental unit or ADU?
Will my basement remodel need a permit?
Almost every basement remodel in Seattle requires a permit, especially if you’re adding a bathroom, bedroom, kitchen, or making structural changes. Permitting ensures that your renovation meets safety, energy, and building codes. Our team handles the entire permitting process for you, including drawing up plans and working directly with the city so everything is up to code and on schedule.
How much does a basement renovation cost in the Seattle area?
Costs can vary depending on the size, condition, and scope of your project. On average, most basement renovations in the Seattle area fall between $90,000 and $200,000. Finishing an unfinished basement with bedrooms, a bathroom, and a living area typically costs less than converting it into a legal apartment with a kitchen and separate entrance. We always start with a clear, itemized estimate so you understand exactly where your budget is going.
What’s the return on investment for a basement remodel in Seattle?
Basement remodels in our region tend to have strong ROI—often 65% or more. Creating livable square footage, especially in high-demand areas like Seattle, Bellevue, and Kirkland, adds real value to your home. Whether you're looking to add a guest suite, create rental income, or increase resale appeal, remodeling your basement is one of the smartest investments you can make.
What are the biggest challenges with remodeling a basement in Seattle?
The biggest challenges often include moisture control, ceiling height, and meeting egress requirements. Many older homes in Seattle weren’t built with finished basements in mind, so it takes creative planning and solid construction know-how to bring everything up to code. At A-Z, we’re used to working in tight spaces and overcoming these obstacles while keeping your design goals intact.
How long does a basement remodel typically take?
A full basement renovation usually takes 10 to 16 weeks, depending on the complexity of the project and whether we’re dealing with an unfinished space or converting it into a legal ADU. We take pride in our organized process and proactive communication to keep your project moving smoothly and on schedule.
Can I remodel my basement during the rainy season?
Yes, and it’s actually a great time to start. Since most of the work takes place indoors, weather has less of an impact on basement renovations than other types of projects. That said, we always take extra precautions to manage moisture, especially during Seattle’s wettest months. We also check for proper drainage and waterproofing before we begin.
What kinds of spaces can I create in my basement?
The possibilities are nearly endless. We’ve helped Seattle-area homeowners create basement apartments, home offices, media rooms, gyms, laundry rooms, wine cellars, and more. Whether you want a quiet space to work, a fun place to entertain, or an income-generating unit, we can design a space that fits your lifestyle and adds value to your home.
Ready to Get Started? Contact us for Expert Basement Remodeling in Seattle, Renton, and the Eastside
