Replacing siding is as much a structural project as an aesthetic one — the siding system, house wrap, and sheathing work together to protect the building envelope from Canada's harsh freeze-thaw cycles, driving rain, and in coastal BC, persistent moisture. Vinyl siding at $8,000–$18,000 is the most affordable option and dominant in the Prairies and Atlantic Canada, while fiber cement (James Hardie) at $15,000–$30,000 has gained share in Ontario and BC due to its durability and painted-wood appearance. Material and labour costs run 15–20% above the national average in Toronto and Vancouver.
This calculator estimates your siding replacement based on total wall area, number of storeys, material choice, and project details. Configure the siding product, whether you are replacing the house wrap and sheathing underneath, soffit and fascia scope, window and door trim complexity, and whether scaffold is required for upper-storey work. The estimate adjusts for your city's labour rates and shows a line-by-line breakdown of materials versus installation costs.
Before collecting quotes, measure your total wall area and subtract window and door openings — contractors estimate on net wall area, and an accurate number prevents wide quote discrepancies. Ask each contractor whether they include house wrap replacement in their scope: some assume re-use, which is inadvisable if the original is over 15 years old.