A 2nd storey addition cost in Ontario ranges from $375 to $550 per square foot in 2026, with Toronto and GTA projects often reaching $400–$700+. For a standard 800–1,000 sq ft second storey, total costs including permits and engineering typically fall between $280,000 and $550,000.
The average cost per square foot to build a house in Ontario for 2026 ranges from $325 to $550, influenced by location, home type, and quality of finishes.
In Ontario, a Tarion warranty is transferable to a new owner but does not transfer automatically. Buyers must notify Tarion, submit the Agreement of Purchase and Sale and transfer deed, then register for Tarion MyHome to activate ongoing warranty coverage.
The Ontario Building Code Guide 2026 outlines the critical changes every homeowner needs to understand. In 2026, the Ontario Building Code introduces major rules for fire protection, carbon monoxide alarms, zoning, permits, building construction codes, and energy efficiency.
Sustainable construction practices in Ontario focus on minimizing environmental impact, maximizing energy efficiency, and supporting healthier communities. These practices use eco friendly building materials, advanced building envelopes,
Pre-construction planning Ontario is the process of determining every project detail—including budget, permits, design, and regulations—before breaking ground
Multigenerational homes Ontario are residences designed to accommodate multiple generations, such as grandparents, parents, and children, within a single household.
HCRA Ontario is the official regulator for new home builder licensing and registration. Every home builder in Ontario must be registered with HCRA Ontario to legally build or sell new homes
Custom home builders in Ontario deliver unique, tailor-made residences suited to your vision and needs. To ensure a risk-free experience, always ask 10 critical questions about builder licensing, experience,
Building permits Ontario are required before starting almost any construction or major renovation project over 10 square meters.
