Building Codes Ontario

| Feature | Requirement (Typical Part 9 Residential) | |--------|--------------------------------------------| | Snow load | 1.5–3.5 kPa (regional) | | Wind load | 0.5–0.9 kPa | | Frost protection depth | 1.2 m min. | | Ceiling height | 2.1 m min. | | Egress window size | 0.35 m² min., 380 mm min. dimension | | Stair rise/run | 210 mm max / 210 mm min | | R-value (walls) | R-22 effective (RSI 3.85) | | Air leakage | ≤ 2.5 ACH @50 Pa | | Smoke alarms | Hardwired, interconnected | | Plumbing vent | ≥ 3" through roof | | Accessible door width | 850 mm (public buildings) |

: Includes standards for barrier-free entrances, exits, and facilities (like drinking and toileting) to ensure buildings are usable for everyone. building codes ontario

Tip: Always call your local building department to confirm. "Zoning" (where you can build) is different from "Building Code" (how you can build). | Feature | Requirement (Typical Part 9 Residential)

The 2024 edition is designed to better align Ontario's requirements with the . Major highlights include: dimension | | Stair rise/run | 210 mm

The Code has become much stricter regarding energy efficiency (Part 12 of the OBC). New builds and major renovations must meet specific insulation values (R-values), window efficiency standards, and air-tightness requirements.

| Feature | Requirement (Typical Part 9 Residential) | |--------|--------------------------------------------| | Snow load | 1.5–3.5 kPa (regional) | | Wind load | 0.5–0.9 kPa | | Frost protection depth | 1.2 m min. | | Ceiling height | 2.1 m min. | | Egress window size | 0.35 m² min., 380 mm min. dimension | | Stair rise/run | 210 mm max / 210 mm min | | R-value (walls) | R-22 effective (RSI 3.85) | | Air leakage | ≤ 2.5 ACH @50 Pa | | Smoke alarms | Hardwired, interconnected | | Plumbing vent | ≥ 3" through roof | | Accessible door width | 850 mm (public buildings) |

: Includes standards for barrier-free entrances, exits, and facilities (like drinking and toileting) to ensure buildings are usable for everyone.

Tip: Always call your local building department to confirm. "Zoning" (where you can build) is different from "Building Code" (how you can build).

The 2024 edition is designed to better align Ontario's requirements with the . Major highlights include:

The Code has become much stricter regarding energy efficiency (Part 12 of the OBC). New builds and major renovations must meet specific insulation values (R-values), window efficiency standards, and air-tightness requirements.