How does the new BCBC 2024 seismic code affect my renovation plans?

The BCBC 2024 seismic updates, which took effect March 10, 2025, primarily impact new construction and major structural work rather than typical renovations. For most homeowner renovations like kitchens, bathrooms, or finishing basements, you likely won't encounter these new requirements unless your project involves significant structural modifications.

The most substantial changes are in Section 9.23 — Bracing to Resist Lateral Loads Due to Wind and Earthquake, which updates how buildings must be designed to handle seismic forces. These requirements apply when you're building new structures (like laneway houses or additions) or making major structural alterations that require engineered drawings. The code also introduces new adaptable dwelling requirements for large apartment buildings, mandating that 1 in 5 units have accessible features like wider doorways and reinforced bathroom walls for future grab bar installation.

For existing home renovations, you'll encounter BCBC 2024 seismic requirements if you're doing substantial structural work like removing load-bearing walls, adding significant floor area, or reinforcing your foundation. This is particularly relevant for Vancouver homeowners with pre-1980s homes, which often have unreinforced cripple walls, unreinforced masonry chimneys, or soft-story construction that doesn't meet current seismic standards. If your renovation triggers these requirements, you'll need to bring those structural elements up to current code — which can add $10,000-$30,000+ to your project depending on the scope.

There's an important transition provision that may benefit you: if your design work started before March 8, 2024, you can still follow the 2018 BCBC provided you apply for permits before March 8, 2027. However, any new permit applications submitted after March 10, 2025, must comply with BCBC 2024. This means if you're in the planning stages now, you'll be working under the new code.

Vancouver's high seismic zone makes these updates particularly relevant for our region. The new code better accounts for the significant earthquake risk we face from the Cascadia Subduction Zone. While this means stricter requirements, it also means better protection for your home and family. If you're planning major structural work, budget for potential seismic upgrades and ensure your contractor understands the new requirements — many are still getting up to speed on the changes.

Your municipal building department will determine which requirements apply to your specific project. For complex renovations involving structural work, consider hiring a structural engineer early in the planning process to assess what upgrades may be required under BCBC 2024.