NZ Building Code · Reference

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The full New Zealand Building Code clause list — B1 through H1 — in plain English, with what each clause governs and its Acceptable Solution reference. Tell it about your project and it highlights the clauses that likely apply.

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The clauses

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Highlighted clauses likely apply to your project. All clauses are shown for reference.
B

Stability

B1

Structure
Resist loads (gravity, wind, earthquake, snow) and stay stable.
B1/AS1, B1/VM1
Applies

B2

Durability
Building elements last their intended life — 50, 15 or 5 years.
B2/AS1
Applies
C

Protection from Fire

C1

Objectives (fire)
Overarching fire-safety objectives for the building.
C/AS1, C/AS2
Applies

C2

Prevention of fire occurring
Reduce the chance of fire from fixed appliances and services.
C/AS1
Applies

C3

Fire affecting areas beyond the source
Limit fire spread to other property or household units.
C/AS1, C/AS2
Applies

C4

Movement to place of safety
Occupants can escape safely in a fire.
C/AS1
Applies

C5

Access and safety for firefighting
Fire service access and firefighting provisions.
C/AS1
Applies

C6

Structural stability during fire
Structure maintains stability for the required fire period.
C/AS1
Applies
D

Access

D1

Access routes
Safe entry, movement and egress around the building.
D1/AS1
Applies

D2

Mechanical installations for access
Lifts, escalators and moving walkways.
D2/AS1
Applies
E

Moisture

E1

Surface water
Stormwater disposal; protect the building from surface flooding.
E1/AS1
Applies

E2

External moisture
Weathertightness — keep water out of roofs, walls, cladding and junctions.
E2/AS1
Applies

E3

Internal moisture
Manage condensation and internal water splash and overflow.
E3/AS1
Applies
F

Safety of Users

F1

Hazardous agents on site
Protect people from site contaminants and ground gases.
F1/AS1
Applies

F2

Hazardous building materials
Limit hazards from glazing, materials and emissions.
F2/AS1
Applies

F3

Hazardous substances and processes
Control hazardous substances and processes.
F3/AS1
Applies

F4

Safety from falling
Barriers to decks, stairs, landings, windows and level changes.
F4/AS1
Applies

F5

Construction and demolition hazards
Protect people during construction and demolition.
F5/AS1
Applies

F6

Visibility in escape routes
Escape routes remain visible in an emergency.
F6/AS1
Applies

F7

Warning systems
Smoke alarms and fire warning systems.
F7/AS1
Applies

F8

Signs
Safety and wayfinding signage.
F8/AS1
Applies

F9

Restricting access to residential pools
Pool barriers and fencing to keep young children out.
F9/AS1, F9/AS2
Applies
G

Services and Facilities

G1

Personal hygiene
Sanitary fixtures — toilets and hand basins.
G1/AS1
Applies

G2

Laundering
Laundry facilities.
G2/AS1
Applies

G3

Food preparation and prevention of contamination
Kitchen and food-prep facilities.
G3/AS1
Applies

G4

Ventilation
Adequate ventilation and indoor air quality.
G4/AS1
Applies

G5

Interior environment
Space, activity and temperature for occupants.
G5/AS1
Applies

G6

Airborne and impact sound
Sound insulation between adjoining household units.
G6/AS1
Applies

G7

Natural light
Natural light to habitable spaces.
G7/AS1
Applies

G8

Artificial light
Artificial lighting where natural light is insufficient.
G8/AS1
Applies

G9

Electricity
Safe electrical installation.
G9/AS1
Applies

G10

Piped services
Safe installation of piped services.
G10/AS1
Applies

G11

Gas as an energy source
Safe gas installation and appliances.
G11/AS1
Applies

G12

Water supplies
Safe, adequate potable water supply.
G12/AS1
Applies

G13

Foul water
Foul water drainage and disposal.
G13/AS1, G13/AS2, G13/AS3
Applies

G14

Industrial liquid waste
Disposal of industrial liquid waste.
G14/AS1
Applies

G15

Solid waste
Solid waste storage.
G15/AS1
Applies
H

Energy Efficiency

H1

Energy efficiency
Thermal envelope, hot water and HVAC energy performance. Free tool: H1 check.
H1/AS1, H1/AS2
Applies

Knowing the clauses is the easy part

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NZ Building Code — questions

What are the clauses of the NZ Building Code?

The Building Code is grouped into: B Stability (B1, B2), C Protection from Fire (C1–C6), D Access (D1, D2), E Moisture (E1–E3), F Safety of Users (F1–F9), G Services and Facilities (G1–G15), and H Energy Efficiency (H1). Each clause sets a performance requirement a building must meet. This page lists them all.

Which clauses apply to my project?

Most new buildings must satisfy structure (B1), durability (B2), fire (C), external moisture (E2) and the relevant services clauses. Features add clauses — a deck brings in F4, a pool brings in F9, gas brings in G11, wet areas bring in E3/G12/G13. Use the filter to highlight the likely set.

What's the difference between a clause and an Acceptable Solution?

A clause states the performance to achieve. An Acceptable Solution (e.g. B1/AS1, E2/AS1) or Verification Method (e.g. B1/VM1) is one way to show you meet it — you can also use an alternative solution. The reference shown on each clause is its common Acceptable Solution.

Do I need an H1 energy schedule?

If your work creates or alters the thermal envelope, yes — clause H1 applies. Produce it with our free H1 check, or the H1 Calculator. See also the document checklist for what to lodge.