Staircase renovation is one of the highest-impact visual changes in any Ontario home. Here is a complete guide to what is allowed, what it costs, and what Ontario Building Code requires.
Ontario Building Code Requirements
Guard rail required for stairs with more than 3 risers. Minimum guard height: 900mm on stairs, 1,070mm on landings. Balusters must prevent a 100mm sphere from passing through (child safety standard). Open risers permitted only if a 100mm sphere cannot pass between tread and nosing above.
Tread Replacement
Replacing carpet-covered stairs with hardwood or engineered wood treads is among the most popular Ontario renovations. Existing stringer structure is kept, new treads and risers installed over or in place of existing. Cost: $80-$200/tread supply and install.
Railing Systems
Traditional wood newel and balusters: $150-$400/linear ft. Metal (wrought iron/steel) balusters with wood rail: $200-$500/linear ft. Glass panel railing: $500-$1,200/linear ft. Glass railings dominate open-concept Ontario homes in the premium tier.
Full Staircase Replacement
Including stringers, treads, risers, and railing: $8,000-$25,000 for a typical single-flight interior staircase. Complexity, species of wood, and railing system drive cost variance.
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