Construction guide
Offices
Offices are judged on energy, comfort and resilience by tenants, valuers and insurers. Here are the ratings and rules that shape commercial office buildings in New Zealand.
H1/AS2Energy efficiency route for offices over 300 m²; the old schedule method is gone in the 2nd edition [1]
NZS 4243.2Lighting energy limits for commercial buildings over 300 m² [1]
34% NBSCurrent earthquake-prone threshold, which a 2025 reform plans to replace with a risk-based system [2][3]
Energy and ratings
H1 energy efficiency
- Commercial buildings over 300 m² comply through H1/AS2 or the modelling route H1/VM2 [1].
- The second edition of H1/AS2 removed the schedule method, so most offices now use the calculation method or modelling [1].
- Artificial lighting must meet NZS 4243.2 section 3.3 [1].
NABERSNZ and Green Star
- NABERSNZ rates the measured energy use of an office (base building or whole building), run by EECA.
- Green Star, from the NZ Green Building Council, rates design and construction across energy, water, materials and indoor environment.
- Tenants and lenders increasingly ask for both.
Comfort and air
- Mechanical ventilation and air conditioning designed to G4 and AS 1668.2; check outdoor air rates against occupancy.
- Zone controls, CO₂-based demand ventilation and good façade shading cut energy and complaints.
Earthquake resilience
- Today a building rated below 34% of the New Building Standard (NBS) can be declared earthquake-prone and must be strengthened or demolished within set timeframes [2].
- In September 2025 the government announced an overhaul: %NBS ratings would be replaced by a risk-based system with four levels of mitigation, and buildings in low seismic zones such as Auckland and Northland would come out of the system [3].
- The bill was expected to pass before the 2026 election; check its status before relying on either set of rules [3].
Compliance after completion
- Specified systems on the compliance schedule commonly include sprinklers (SS1), automatic doors (SS3), mechanical ventilation (SS9) and fire separations, signs and final exits (SS15) [4].
- The owner gives the council a building warrant of fitness (BWOF) every year [4].
Tools for this building type
Sources
Numbers in square brackets refer to these sources, checked October 2026. Standards and rules change; confirm the current edition with your council and the issuing body before you rely on them.