Where design meets craft.

We're a design-build firm based in the GTA — combining considered space planning with hands-on construction to deliver spaces built right from concept to completion.

Residential
Basement
Additions
Construction & project management

Basement renovations

Full-scope basement finishing — from open-concept rec rooms to legal suites with full egress and permits.

Kitchen & bath remodels

Fully managed renovations with trade coordination and a single point of contact throughout.

Additions & custom builds

Home additions, laneway suites, and ground-up builds designed and constructed with precision.

Whole-home renovations

Gut renovations and full remodels for buyers looking to reshape a home before moving in.

Outdoor living

Decks, pergolas, and outdoor entertaining spaces designed to extend your home's usable square footage.

General contracting

Full GC services for homeowners and developers — we manage trades, schedules, and budgets end to end.

Space planning & drawings
Registered designer

Space planning & layout design

We work with you on floor plan layouts, material and finish selections, lighting plans, and overall design direction — helping you make confident decisions before a single wall goes up.

Permit ready

Construction drawings

We prepare permit-ready drawing packages for building permit submissions — including floor plans, sections, and construction details prepared by a registered designer under the Ontario Building Code.

Design services are provided by a registered designer under the Ontario Building Code. BuildTheory 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.
01

Discovery call

We learn about your project, timeline, and goals — no obligation, no pressure.

02

Site visit & scope

We walk the space, take measurements, and put together a detailed scope and estimate.

03

Design & permits

We prepare drawings, handle material selections, and submit for any required permits.

04

Build

We manage every trade, every delivery, and every detail until your project is complete.

Let's talk about your project.

Whether you have a full set of plans or just an idea — we're happy to have a conversation. We serve the GTA and surrounding areas.

(647) 000-0000
hello@buildtheory.ca
Mississauga, ON