Onyxbasements

Expert basement builders in Calgary specializing in construction, finishing, and remodeling. Our trusted developers deliver high-quality basement systems and renovations, turning underused spaces into legal suites, home offices, gyms, or family retreats. With full-service expertise from design and permitting to plumbing, electrical, insulation, drywall, flooring, and custom kitchens/bathrooms, we ensure code-compliant, stress-free transformations that boost your home's value and comfort. Contact Calgary's top basement renovation pros today.

Transform your underutilized basement into a stunning, functional space with expert basement development services from Calgary's top contractors and development companies. We specialize in complete basement renovations tailored to your lifestyle—whether you envision a cozy family room, home office, gym, or entertainment haven.

Our leading team delivers end-to-end solutions, from initial design consultations and structural assessments to high-quality construction and finishing touches. Using premium materials and innovative techniques, we ensure durability, energy efficiency, and compliance

Looking for the best basement development company in Calgary? Our expert Calgary basement developers and contractors at Onyx Basements deliver top-quality basement transformations that convert underused spaces into stunning, functional areas like legal suites, home theaters, gyms, guest rooms, or home offices.​

With extensive local experience, we manage every detail from free consultations and custom 3D designs to full permitting, waterproofing, demolition, framing, plumbing, electrical, HVAC, insulation, drywall, flooring, kitchens, bathrooms, and premium finishes. Our efficient 4-12 week