Ace Build Contracting creates legal basement apartments in Mississauga. If you’re looking for a safe, comfortable, code-compliant lower-level living space in your home, our high-quality builds are tailored to your needs and include a 2-year workmanship warranty.
Our WSIB-covered design-build team carries an HCRA licence. We support your project from the initial planning phase through drawings, permits, construction, finishing, and the final walkthrough. Trust us to build you a safe, code-compliant Mississauga legal basement.
350+
5-Star Reviews
500+
Projects Completed
8+ Years
Building Excellence
100%
Project Compliance
Our Legal Basement Renovation Services
We provide the planning, technical support, permit handling, construction, and finishing services needed to turn your basement into a legal, livable lower-level apartment.
Basement Layout Planning
Based on your needs, we plan a practical basement apartment layout, including legal bedrooms, bathrooms, storage, living space, ventilation, ceiling height considerations, and comfortable separation from the upper levels.
Architectural Drawings and Permit Support
We coordinate all the architectural and engineering drawings you need, as well as permit requirements. We also obtain the permits, so your Mississauga basement apartment is completely legal.
Separate Entrance Planning
We plan and build separate entrance options designed around your property, basement layout, access needs, drainage, grading, safety requirements, and long-term use of your lower-level suite.
Fire Separation, Electrical, Plumbing, and HVAC
Our team arranges the core technical work for your legal basement apartment in Mississauga, including fire separation, electrical, plumbing, ventilation, heating, cooling considerations, inspections, and certificates.
Kitchen, Bathroom, Laundry, and Final Finishes
Ace Build Contracting handles the entire construction process, down to the last finishes. Our legal basement apartments in Mississauga include kitchens, bathrooms, laundry, flooring, lighting, doors, paint, fixtures, and trim.
Flexible Financing Options Available
Start your renovation sooner with financing options that allow you to spread out costs while investing in your home’s long-term value.
Quick Approvals
Flexible Payment Plans
Financing Tailored to Your Project
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What Our Clients Say
The team was professional, respectful of our home, and kept the site clean and safe. Communication was excellent—questions were answered the same day, and every change order was priced clearly before work proceeded. The craftsmanship really shows in the framing, drywall, millwork, and finishes, and the new layout from the addition flows perfectly with the original house.
We finished on schedule and very close to the agreed budget. If you’re considering a home addition or major renovation in the Burlington and the GTA, I highly recommend Ace Build Contracting. They’re reliable, transparent, and truly build with precision—the kind of contractor you can trust when you don’t have time to micromanage. Our house looks incredible and functions even better.
They were super professional, kept the place clean, and communicated well throughout the project. The design came out beautiful and modern, and the quality of their work really stands out. Everything feels solid, clean, and high-end.
If you want a basement done properly (and legally), Ace Build is the team to call. Highly recommend!
Why Choose Ace Build Contracting
How Much Does a Legal Basement Renovation Cost in Mississauga?
The cost of a legal basement renovation in Mississauga typically starts at around $80 per square foot. Depending on size, layout, entrance work, systems, and finishes, a legal basement may cost $80,000 to $150,000+.
Start Planning Your Legal Basement Renovation
Optimize your space with a legal basement apartment in Mississauga or elsewhere in the GTA. Schedule your consultation with Ace Build Contracting today. We’ll listen to your needs and design vision, help you develop a realistic budget, and invite you to the Mississauga office for in-person discussions and ideas for a comfortable and welcoming basement living space.
Legal Basement Service Areas
We offer legal basement renovation services in Mississauga and the wider GTA, including the following locations: