The cost of a home addition in Ottawa depends on size, complexity, and materials used. On average, prices range from $150 to $350 per square foot. A basic addition may cost around $80,000, while high-end expansions can exceed $250,000.
Key cost drivers include foundation work, roofing, HVAC extensions, and interior finishes. Permits and engineering approvals also add to the total cost.
Planning with a design-build contractor can help streamline the process and prevent costly surprises.
