Garden suite construction
Accessory Dwelling Units

Maximize your
property.
As-of-right.

Fast, perfectly insulated structural concrete shells for Toronto's backyard garden suites. We handle the heavy lifting. You handle the investment.

Evaluate My Lot Investment Overview
Toronto Zoning Change

The ADU Wave is Here

Toronto now permits secondary dwellings as-of-right in all residential zones. No variance. No special hearing. Build a garden suite on your property—legally, permitted, and profitable.

We are the structural specialists. You bring the site. We deliver the shell.

Toronto ADU Specs

  • Max Lot Coverage: 30% of lot area
  • Max Height: 9.5m (31 ft)
  • Min Lot Size: 200 sq m (2,150 sq ft)
  • Parking Required: 1 space per suite (can be tandem)
  • Easements: Subject to local requirements
Why ICF?

The Smart ADU Choice

ICF for Garden Suites

Zero Space Wasted

ICF walls are thinner than traditional framing. Every square foot of interior space counts on a small lot.

Perfect Insulation

R-48 thermal efficiency = $50+ monthly heating/cooling savings for the tenant. Rental appeal.

Speed to Occupancy

ICF shell in 6-8 weeks. Finishes and utilities follow. Rent-ready in 6 months total.

Durability

Concrete shell lives 100+ years. Lower maintenance. Higher tenant retention.

Quick Comparison

ICF Shell

6-8 weeks | R-48 | $40/sq ft | Lifetime durability

Wood Frame

10-12 weeks | R-20 | $28/sq ft | Ongoing maintenance

Financial Picture

Investment Overview

Structural Shell Cost

ICF shell only (no finishes, utilities, or interior):

400 sq ft Unit

$16K - $20K

600 sq ft Unit

$24K - $30K

800 sq ft Unit

$32K - $40K

Total Build + Finishes

Rough estimate from shell to occupancy (finishes, MEP, permits):

400 sq ft Unit

$120K - $160K

600 sq ft Unit

$180K - $240K

800 sq ft Unit

$240K - $320K

These are structural shell costs only. Total project cost includes finishing, utilities, permits, and design. We provide shell, you finalize with contractors and design team.

Common Questions

Garden Suite FAQ

Do you handle permits?
We partner with architects and engineers who manage the permit process. We focus on the structural phase once permits are approved.
How long does a garden suite shell take?
Typically 3-6 weeks for the ICF foundation and shell, depending on size and site conditions.
What size garden suites do you build?
We build garden suites from 400 to 1,200 sq ft, single and two-storey configurations.
Do I need architectural drawings?
Yes. We work from approved architectural drawings. We can refer you to architects familiar with Toronto ADU requirements.

Ready to maximize your property?

We'll evaluate your lot size, zoning compliance, and timeline. Then we quote your shell.

What We'll Ask

• Your lot size and address (for zoning check)
• Desired ADU size (400–800 sq ft)
• Timeline for occupancy
• Whether you have architect/engineer yet

Evaluate My Lot