Canadian building code question

What energy modelling is required for buildings in Canada?

Energy modelling in Canada is required when a building takes a performance compliance path under NECB, a provincial energy code, or a tiered program such as the BC Energy Step Code, with specific software, baseline, and reporting requirements set by each path.

Energy modelling is not universally required, but the performance compliance paths that most non-residential and high-performance residential projects choose effectively make it mandatory. The exact modelling expectation depends on the path the project follows.

What to check first

  • Decide whether the project will follow a prescriptive or performance compliance path.
  • If performance is chosen, identify the controlling reference standard — NECB, NBC Section 9.36, or a provincial energy code.
  • Confirm the required modelling software, baseline definition, and report format expected by the authority.

Jurisdiction notes

NECB for larger buildings

Most Part 3 and similar large buildings follow NECB or a provincial adoption of NECB.

Section 9.36 for small buildings

NBC Section 9.36 sets prescriptive and performance options for Part 9 buildings.

Step Code requires modelling

The BC Energy Step Code performance path requires whole-building energy modelling and airtightness verification.

Work through it in this order

  1. Identify the controlling energy code and its compliance options.
  2. Choose between prescriptive and performance compliance based on the project's design freedom.
  3. Select compliant modelling software and a recognized methodology.
  4. Document baseline assumptions, internal loads, and HVAC inputs transparently.
  5. Submit the modelling package alongside the architectural and mechanical permit drawings.

Common questions

Is energy modelling required for every building?

No. Many buildings can take a prescriptive path. Modelling is needed when the project follows a performance route.

Which standard governs energy modelling?

Usually NECB or a provincial adaptation; small buildings reference NBC Section 9.36. The BC Energy Step Code adds program-specific modelling expectations.

Who is qualified to perform energy modelling?

Practitioners with the appropriate energy advisor, modeller, or engineering credentials accepted by the authority having jurisdiction.