Bump-Out Extensions

Bump-out extensions add 2 to 15 feet of depth to an existing room, making them an efficient and cost-effective solution for Ottawa homeowners who need just a bit more space in a kitchen, bathroom, dining room or main-floor bedroom. Because a bump-out extends the footprint of your home, it requires a new foundation section with footings below Ottawa's deep frost line, as well as modifications to your exterior wall, roof overhang and siding.

A bump-out is less disruptive than a full room addition because the existing structure remains largely intact, with only one wall opened up. Despite the smaller scale, a City of Ottawa building permit is still required and zoning setbacks must be verified, especially for side-yard and rear-yard bump-outs. In Ottawa's older neighbourhoods like Vanier, Alta Vista and Sandy Hill, bump-outs are a practical way to modernize compact postwar homes without the cost of a full addition.