Adding a pergola to your Ottawa deck is one of the most popular summer upgrades — but Ottawa's snow load, freeze-thaw cycles, and building permit requirements make it more technical than most homeowners expect. A pergola attached to the house almost always requires a City of Ottawa building permit, and any permanent structure needs footings past the 4-foot frost line.
A kit-built pergola in Ottawa typically costs $2,500 to $6,500 installed. Custom pergolas range from $7,000 to $18,000 depending on size and material. Aluminium systems perform best in Ottawa's climate — no rot, no painting, and manufacturer-rated for eastern Ontario snow loads. Building a pergola at the same time as a new deck saves significantly on labour and permit costs compared to retrofitting later.
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