Where design meets craft
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Mississauga, ON
Basement Renovation
Oakville, ON
Kitchen & Bath
Etobicoke, ON
Kitchen & Bath
Brampton, ON
Addition & Custom Build
Toronto, ON
Whole-Home Renovation
Milton, ON
Outdoor Living
Full-scope basement finishing — from open-concept rec rooms to legal suites with full egress and permits.
Fully managed renovations with trade coordination and a single point of contact throughout.
Home additions, laneway suites, and ground-up builds designed and constructed with precision.
Gut renovations and full remodels for buyers looking to reshape a home before moving in.
Decks, pergolas, and outdoor entertaining spaces designed to extend your home’s usable square footage.
Full GC services for homeowners and developers — we manage trades, schedules, and budgets end to end.
Floor plan layouts, material and finish selections, and lighting plans — confident decisions before a wall goes up.
Permit-ready drawing packages — floor plans, sections, and details prepared by a Registered Designer under the OBC.
Design services are provided by a Registered Designer under the Ontario Building Code. Build Theory does not offer the regulated services of a licensed architect or registered interior designer (ARIDO). For projects requiring those designations, we are happy to refer you to the appropriate professional.
We learn about your project, goals, and budget — then decide together if we’re the right fit.
We visit the space, take measurements, and put together a detailed scope and estimate.
We prepare drawings, handle material selections, and submit for any required building permits.
We manage every trade, every delivery, and every detail — keeping you updated from demo to final walkthrough.
Whether you have detailed plans or just an idea, we're happy to have a conversation. We serve Mississauga and the surrounding Greater Toronto Area.