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Introduction to the Data section Data.png

LCA is data intensive. This section provides data that have been compiled by BRANZ to support building LCA of offices, and comprises:

Datasheets - generic data to support LCA modelling of the building life cycle.
LCA data - a New Zealand low voltage Grid electricity dataset for use when modelling the environmental impacts as a result of use of Grid electricity.


Datasheet data are generic i.e. they do not relate to specific building products, and therefore are aimed for use in early design when decisions on specific products are less likely to be made.

The data are presented in Excel. Each datasheet has a worksheet that provides guidance on the structure of the datasheet, and how to use the presented information. BRANZ recommends that you read this prior to use.

Datasheets may be useful for other LCA applications. It is up to the user to determine the suitability of the data for these other purposes.

Datasheets are named according to modules in the life cycle of buildings. For information about modules, click here.

  • Module A4: This datasheet provides generic transport distances of construction products by mode from the last manufacturer, fabricator or assembler to a construction site in Auckland, Wellington and Christchurch.
  • Module A5 : This datasheet provides waste generation rates for construction products that may be used in the office building structure and envelope. Data is also provided on subsequent fate in terms of reuse, recycling, recovery or landfill. 
  • Module B1 to B7 (Use Stage): Provides a default office building service life.
  • Module B2: Provides scheduled maintenance information for constructed assets during the building service life. Focus is on structure and envelope.
  • Module B4: Provides estimated service life data for constructed assets. Focus is on structure and envelope.
  • Module B6: Contains defaults for energy modelling of offices obtained from BEES energy template models and other sources. It is important that these defaults are used in energy models of designed buildings in order that the reference building results are comparable. Note that the exception to this is if the building LCA is being undertaken for the purposes of seeking Innovation Challenge points in Green Star. In this case, NZGBC's energy modelling defaults should be used. 
  • Module B7: Contains benchmark water consumption data for New Zealand offices, obtained from Bint (2012).
  • Module C1: Provides "current" and "best practice" data on fate of construction waste at building end of life. Data for "current" practice should be used as the default. 

The methods used for development of these datasheets are set out in the BRANZ SR351 study report. 

The intention is to add to and improve these datasheets with data and information provided by construction industry stakeholders. To find out how you can provide data and information, please click here.

LCA data

This section has data for use when modelling buildings using LCA. Given the significance of electricity use during occupation of buildings, a New Zealand low voltage Grid electricity dataset is available for download.
When comparing buildings using LCA, it is important that data used are comparable and consistent. This dataset is provided for this purpose.
The dataset is based on the LCA model developed by Sacayon Madrigal (2016) and comprises a three year average from 2012 to 2014 inclusive. Greenhouse gas emissions arising as a result of production and supply of electricity on the Grid may vary year to year depending on the amount and location of rainfall. A Grid average over 3 years has therefore been calculated to smooth out annual peaks and troughs that may result from different rainfall patterns each year.

The dataset can be received in the following formats:

References cited in this section

Sacayon Madrigal EE; Assessment of the life cycle-based environmental impacts of New Zealand electricity; Masters thesis presented to Massey University; 2016.