Rated 4.9/5 ★ ★ ★ ★ ★
Basement Development & Renovation
Custom Basement Built to Fit Your Vision & Budget
Get a FREE Quote!
PROJECTS COMPLETED
YEARS OF EXPERIENCE
PROFESSIONAL TEAM
Licensed. Bonded. Insured.
Full-Service Basement Development
Built for Living.
Built to Last.
At Westaim Construction, we turn cold, unfinished basements into warm, functional, and stylish living spaces. From framing and electrical to plumbing and final finishes, we manage every stage of development with expert precision. We provides full-service basement renovations — from layout design to construction of bedrooms, kitchens, bathrooms, living areas, walkout basements and custom storage.
- Custom kitchens with cabinetry & backsplashes
- Spa-inspired bathrooms with walk-in showers
- Framed bedrooms with closets and large egress windows
- Open-concept media/family rooms
Get Started in 3 Easy Steps
🏅CLIENT REVIEW
Rated 5/5 ★ ★ ★ ★ ★
“We had an unfinished basement that was basically just collecting dust and boxes. With two kids and both of us working from home, we desperately needed more space — but didn’t know where to start or who to trust. Westaim Construction came highly recommended, and they exceeded every expectation. They helped us design a layout with a home office, a playroom for the kids, and even added a guest bedroom with a bathroom. The team was professional, transparent with pricing, and stayed on schedule. Our basement has gone from wasted space to the most used area of our home!”
— Sarah & Mike G., Calgary SE
Our Basement Development Portfolio
Legal Secondary Suite
Guest Bedroom & Ensuite
Home Office
Kids’ Playroom
Home Gym
Entertainment Room
Built Right. Built Smart.
BASEMENT DESIGN EXPERTS
We follow all City of Calgary codes and standards for proper insulation (R-value), moisture protection (poly vapor barriers), safe egress windows, fire-rated drywall assemblies, and soundproofing solutions. Your basement won’t just look great — it will be warm, dry, safe, and functional all year long.
“We create spaces you’ll actually want to spend time in — cozy family lounges, practical storage zones, and guest-ready suites designed for real life.”
The #1 Legal Basement Suite Builder in Calgary, AB
With precision and craftsmanship, Westaim Construction helps homeowners unlock the full potential of their basements with structural upgrades and innovative design solutions that add lasting value and comfort.
- Energy-efficient lighting
- Sound dampening between floors
- Proper HVAC zoning
- Heated flooring options (if applicable)
From Bare Walls to Beautiful Spaces
Functional Design for Daily Life
Technical Quality + Comfort
At Westaim Construction, we specialize in transforming underutilized basement spaces into fully functional, high-performance living areas tailored to your needs. Whether you’re envisioning a legal secondary suite, a custom home theatre, a gym, wet bar, or a spacious guest bedroom with an ensuite, our team provides complete basement development services in Calgary. Our renovation expertise covers everything from underpinning and moisture barrier systems to subfloor levelling, egress window installations, soundproofing, and full HVAC integration. We ensure every project complies with City of Calgary building codes, including fire-rated drywall assemblies, vapor barrier requirements, and proper insulation (R-value) for thermal efficiency.
- In-house design and construction team
- Detailed project timelines and daily updates
- High-quality finishes and craftsmanship
