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By Sebastian Edward-West · Last updated May 29, 2026

Vancouver Step Code Requirements

Current path: Vancouver Building By-law (not the provincial BC Building Code) | Airtightness: functionally Step 4-level (1.5 ACH50) or tighter | Carbon: explicit GHG / near-zero-emissions limits | Climate Zone: 4 | Permit office: City of Vancouver

Vancouver is the one BC city that does not use the BC Building Code

This is the single most important thing for builders to understand: the City of Vancouver has its own charter and its own building code — the Vancouver Building By-law (VBBL) — separate from the provincial BC Building Code and the BC Energy Step Code that applies everywhere else in the province. A spec sheet built for Kelowna or Surrey does not transfer to a Vancouver permit.

In practice the VBBL runs ahead of the provincial Step Code. Where most of BC sits at Step 3 (2.5 ACH50) and is preparing for the 2027 Step 4 jump, Vancouver’s requirements for new low-rise residential already function at a Step 4-equivalent energy level plus explicit operational-carbon limits, with the city moving its new buildings toward zero-emissions.

What’s required right now

For new Part 9-scale residential under the VBBL, builders should plan for:

  • Airtightness at a Step 4-equivalent level — design for 1.5 ACH50 or tighter, verified by a blower door test. Treat 2.5 ACH50 (the rest of BC’s current floor) as nowhere near sufficient here.
  • A carbon / GHG limit, not just an energy-efficiency target. Vancouver regulates operational greenhouse-gas emissions directly, which pushes most new homes toward heat pumps and away from gas space and water heating.
  • Climate Zone 4 envelope design — Vancouver’s mild, wet coastal climate (HDD ~2,800) means the envelope challenge is less about heating load than about hitting the airtightness and carbon numbers while managing moisture.

Because the exact VBBL energy and carbon clauses are updated by the City on its own schedule, confirm the current edition with the City of Vancouver before you finalize a design. The numbers above are the planning reality, not a substitute for the current by-law text.

How Vancouver differs from the rest of BC

Most of BC (BC Building Code)City of Vancouver (VBBL)
Governing code2024 BC Building Code + Energy Step CodeVancouver Building By-law
Current airtightness floor2.5 ACH50 (Step 3)~1.5 ACH50 (Step 4-equivalent)
Carbon requirementZero Carbon Step Code EL-1 and up, varies by municipalityDirect operational-GHG limits, moving to zero-emissions
Climate zoneCZ4 coast to CZ6 mountainsCZ4 (mild coastal)
Permit authorityMunicipal building dept under provincial codeCity of Vancouver under its own charter

For the full province-wide comparison, see BC Step Code by municipality.

Permit process at the City of Vancouver

  1. Pre-application / design. Engage a registered energy advisor early; the VBBL energy and carbon path needs to be modelled into the design before drawings are locked. Vancouver’s process and documentation differ from a standard BC Building Code permit, so budget extra review time.
  2. Building permit application. Submit through the City of Vancouver’s permitting system with the required energy and emissions documentation for the VBBL path.
  3. Mid-construction (recommended). A pre-drywall blower door test catches air-barrier problems while they are still cheap to fix — critical when the airtightness bar is Step 4-equivalent.
  4. As-built / occupancy. Final blower door test and compliance documentation before the occupancy permit.

Climate Zone 4 envelope notes

Vancouver sits in the mildest climate zone in this guide (CZ4, HDD ~2,800), so the heating-driven envelope demands are lower than the Interior. But the airtightness and carbon targets are higher, which shifts the difficulty:

  • Air sealing, not insulation thickness, is the binding constraint. Hitting 1.5 ACH50 in a coastal build is an air-barrier detailing problem more than an R-value problem.
  • Moisture management matters more on the coast. A tight envelope in a wet climate needs a deliberate drying strategy; coordinate the air barrier and vapour control with your wall assembly.
  • Carbon limits drive mechanical selection. Expect heat pumps for space and water heating to meet the GHG path; gas appliances work against the carbon target.

Heading toward zero emissions

Vancouver has been explicit that new buildings are moving toward zero operational emissions, so the direction of travel is more stringent over time, not less. Builders working in Vancouver who learn the airtightness and electrification playbook now are also well-positioned for the rest of BC’s 2027 Step 4 transition, since the underlying skills — a continuous air barrier verified by blower door, and heat-pump-first mechanical design — are the same.

Verify before you apply

The Vancouver Building By-law is updated by the City on its own schedule and is distinct from everything else in this guide. This page is an orientation for builders, not the by-law text. Before finalizing a design or submitting a permit, confirm the current VBBL energy and carbon requirements directly with the City of Vancouver and your registered energy advisor.