Rated 4.9/5 ★ ★ ★ ★ ★
Home Additions
Custom Home Additions & Extension Contractor
Get a FREE Quote!
PROJECTS COMPLETED
YEARS OF EXPERIENCE
PROFESSIONAL TEAM
Licensed. Bonded. Insured.
Customized additions. Seamless transitions.
Room to grow,
without moving out.
Is your current home feeling too small? Whether you’re expanding your family, working from home, or simply looking for more functional space, a professionally planned home addition offers a cost-effective alternative to moving. At Westaim Construction, we specialize in custom-built home additions in Calgary that enhance square footage, elevate property value, and comply with local building codes.
- Room Additions
Perfect for adding extra bedrooms, a family room, or home office. Our structural engineers ensure that all new load-bearing components are tied into your existing foundation and framing system. - Second-Story Additions
Double your square footage without expanding your footprint. We reinforce the original foundation and use engineered floor systems and advanced load transfer methods to safely support the second level.
Get Started in 3 Easy Steps
🏅CLIENT REVIEW
Rated 5/5 ★ ★ ★ ★ ★
“They helped us plan and build a second-story addition with two bedrooms and a bathroom—all while making sure everything met Calgary’s building codes. Their team was professional, transparent, and stayed on schedule. The new space blends so well with the original structure, you’d never guess it wasn’t always there.
We finally have the room we need without leaving the home we love.”
— Amanda P., Cochrane, AB
Our Home Additions Portfolio
Room Additions
Second-Story Additions
Sunrooms & Enclosed Patios
Garage Conversions & Additions
Rear or Side Extensions
Fitness Room
Expand Your Living Space Today!
COMPLETE HOME EXPANSION
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.
“When your lifestyle outgrows your space, you don’t have to leave the home you love.”
Calgary Zoning & Permit Compliance
Building an addition in Calgary requires full compliance with the Land Use Bylaw, zoning regulations, and building code standards. Westaim manages the entire approval process:
- Development Permit (if required based on size or proximity to property line)
- Building Permit for structural, electrical, HVAC, and plumbing compliance
- Site Plans & Elevation Drawings
- Geotechnical/Structural Assessments (for second-story builds or foundation expansions)
We work directly with the City of Calgary and certified inspectors to ensure every phase of your addition is code-compliant and properly documented.
From concept to completion
Designed for life. Built to last.
Add value and comfort.
With expert planning, engineering, and craftsmanship, Westaim Construction helps you expand your living space seamlessly — whether it’s a second-story addition, a new bedroom, or a sun-filled extension. We build with precision, meet every permit requirement in Calgary, and deliver custom home additions that feel like they’ve always been part of your home.
- Seamless architectural integration
- Transparent, fixed pricing
- Superior craftsmanship and materials
- On-time, on-budget completion
- Permit management and code compliance
