SmartBuildSupply & Service Inc.
All services / Toronto & GTA

Home Additions

Engineering, permits, structure, and finishing in one project.

Outdoor structure layout and footing preparation

Scope of work

What we handle

Add the space you need without managing multiple contractors.

Your estimate confirms the work and materials included.

  • 01

    Structural Engineering

    Full structural assessment, engineer-stamped drawings, and load-bearing design for safe, code-compliant additions.

  • 02

    Foundation Work

    New foundation poured to match your home's existing system, with proper drainage and waterproofing.

  • 03

    Framing & Envelope

    Stick-frame or engineered lumber framing, roof tie-ins, exterior sheathing, and insulation to match or exceed existing performance.

  • 04

    Exterior Matching

    Siding, roofing, windows, and trim matched to your existing home for a seamless appearance.

  • 05

    Interior Finishing

    Full interior finish to match the rest of your home — drywall, flooring, trim, and paint.

  • 06

    Mechanical Integration

    HVAC extension, electrical panel upgrade, and plumbing integration with your existing systems.

From plan to completion

How the work moves forward

  1. 01

    Feasibility & Design

    Site assessment, zoning review, and design development to confirm what's possible on your property.

  2. 02

    Engineering & Permits

    Structural engineer engagement, full drawings, and permit application submission.

  3. 03

    Site Prep & Foundation

    Excavation, forming, and concrete pour for the new addition foundation.

  4. 04

    Framing & Envelope

    Full structural framing, roof system, windows, doors, and exterior envelope.

  5. 05

    Rough Mechanical

    Electrical, plumbing, and HVAC rough-in throughout the addition.

  6. 06

    Interior Finishing

    Insulation, drywall, flooring, trim, paint, and final finishing to match your home.

Common questions

Before you begin

How long does a home addition take?

From permit approval to completion, most additions take 3–5 months. The timeline depends heavily on permit wait times in your area, which can add 4–8 weeks before we break ground.

How do you match the exterior of my existing home?

We source matching siding profiles, roofing materials, and window styles. In most cases, the addition is indistinguishable from the original structure once exterior work is complete.

What zoning factors matter for an addition?

Key factors include lot coverage limits, setback requirements from property lines, and maximum height restrictions. We review all of these before design begins so there are no surprises.

Get a Free Estimate

Tell us about your project.

Share your location and goals. We’ll arrange a site consultation.

  • Written scope and estimate
  • Coordinated project schedule
  • 2-year workmanship warranty

We respond within 1–2 business days.

Get a free estimate Save contact