NZ Building Code Compliance

Specifically focused on 30 m² buildings that do not require a council building consent

 

Disclosure

There are four steps to doing business in New Zealand when selling buildings. There is a new rule that provides for a simpler approval for buildings 30 m² or less. Before proceeding, read this web page: https://www.building.govt.nz/projects-and-consents/planning-a-successful-build/scope-and-design/check-if-you-need-consents/building-consent-exemptions-for-low-risk-work/new-building-consent-exemptions/

01

Plans and pictures

The offering overview from a market perspective

Size (GFA means gross floor area – interior floor from wall to wall):

  1. Interior width and lengths with dimensions, showing any walls and other interior features (must be below 30 m² GFA)
  2. Interior height (floor to ceiling), and if angled ceiling, low and high points
  3. Wall thicknesses including thickness of curtain walls made of glass
  4. Exterior wall height, roof angle, roof size, overhangs (eaves), gutters or how rain is handled, total exterior height
  5. Footprint – exterior dimensions, any porches (not counted in 30 m² GFA)
  6. Recommended foundation and minimum height above ground

Price

  1. Options: If there are various sizes or features and options, price them separately
  2. Delivery: Price product at your port, and the price at Port of Auckland – specify what is included and excluded

Materials and colour specifications

  1. Frame: Show the structure before covering with cladding, lining, building wrap or insulation
  2. Cladding: Show exterior walls and roof, including colour and pattern choices (including optional pricing)
  3. Interior: Show what the interior floor, walls and ceiling looks like, including colour and pattern choices
  4. Glass: Show door & window design, including opening & fixed, and options – describe sliding, hinged, double-glazed, etc.

Policy on Variations: If open to variations, discuss how the works.

02

Performance

These are claimed numbers, what the building rating is:

See http://www.level.org.nz/site-analysis/new-zealand-climate-and-environmental-zones/

  1. Maximum wind  – see Wind regions. For NZ market, 50 m/s or more (very high). 55 best
  2. Maximum earthquake 
  3. Maximum snow load
  4. Weathertightness
    1. Roof structure and adequate drainage
    2. Flashing details, particularly at intersection and end of flashing
    3. Door and window installation including airseals and sill support
    4. Cladding junctions and movement control joints
  5. External moisture – NZ preferred solution is cavity wall, but if moisture cannot rot, corrode or mould, describe how
  6. Corrosion, rust, rot, insects, vermin, mould and other vulnerabilities

03

Prove Specifications

Provide Engineering Calculations that can be peer reviewed

04

Provide testing

Prove that the products and components cited on paper have been tested and shown to match the calculations.

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