When it comes to finishing your basement, choosing the right contractor from the best basement renovation company in Toronto is essential.
Whether you are converting your basement into a legal apartment, adding a home theatre, or finishing the space for extra living area, the right company makes all the difference.
In 2026, Toronto homeowners want contractors who deliver quality work, stick to quoted prices, and handle City of Toronto permits properly. That means code-compliant builds, proper inspections, and finishes that hold up to daily use.
From basic finishing to complex projects like basement underpinning and basement dig outs, the companies listed below stand out for their reputation, craftsmanship, and value in the Toronto market.
Here is our roundup of the best basement renovation companies in Toronto for 2026.
1. Revival Construction
A trusted name for basement renovations across Toronto, Vaughan, Richmond Hill, and the wider GTA. Revival handles everything from framing and flooring to legal apartment builds and underpinning.
With 15+ years of experience and 200+ completed projects, they focus on honest pricing, clear timelines, and quality finishes. Holding a 5-star Google rating with 20+ verified reviews, Revival is a top choice for Toronto homeowners who want the job done right.
2. RenoDuck
A HomeStars Best of Award winner for 10 consecutive years. RenoDuck is known for transparent pricing with a 2-year workmanship warranty and 3D floor plans included.
Fully licensed and insured, they average 26 days for project completion in Toronto.
3. Harmony Basements
A well-known Toronto contractor with over 20 years of experience. Harmony offers 3D and VR design tools and a mould-free green finishing system.
They handle full basement renovations from design to completion with a showroom in Vaughan.
4. Big Dog Renovations
A full-service design and build contractor with a dedicated client dashboard. Big Dog offers a 5-year transferable warranty and experienced project management.
Known for their structured process and communication throughout Toronto projects.
5. DRV Basements
Known for fast turnaround times, DRV completes many basement projects in 3 weeks. They offer turnkey service including framing, electrical, plumbing, and finishing.
A solid option for Toronto homeowners who want quick completion without sacrificing quality.
6. Reno Rocket
A HomeStars award winner with 20+ years of basement experience. Reno Rocket uses an in-house team rather than subcontractors, giving homeowners more control over quality.
They offer 3D rendering and a project management system to keep clients updated.
7. Senso Design
A custom basement finishing company with strong reviews for craftsmanship. Senso Design offers free consultations and handles complex custom designs.
Known for attention to detail and quality materials in the Toronto market.
8. CSG Renovation
A general contractor with a 5-star Google rating and 5-year warranty. CSG provides detailed cost breakdowns and handles permits and inspections.
They serve Toronto with legal basement apartments for residential and commercial properties.
9. Moose Basements
A one-stop-shop contractor offering 3D digital design and financing options. Moose Basements has renovated over 2,800 basements in the Toronto area.
Known for their structured process from consultation to completion.
10. Assured Basements
A contractor offering turnkey packages with dedicated project managers. Assured Basements specializes in legal basement apartments with pricing from $55 to $75 per square foot.
They serve Toronto with a focus on quality and compliance.
Whether you need a simple rec room or a full legal apartment, this list covers contractors who deliver quality basement renovations in Toronto. Start with a company that handles permits, communicates clearly, and stands behind their work. The best basement renovation companies in Toronto earn their reputation one project at a time.
