Commercial

Review benchmarks and read how managers saved water in shopping centres and office buildings.

Shopping centre water use benchmarks

We developed these benchmarks using data from 40 shopping centres across WA. Compare your water use to see if your site can be more water efficient.

Major regional and regional shopping centres

Average
Best practice 
(water cooled)
Best practice
(air cooled)
1.17kL/m2(GLAR)/year 1.0kL/m2(GLAR)/year 0.8kL/m2(GLAR)/year

Sub-regional and neighbourhood shopping centres 

Average Best practice
 1.40kL/m2(GLAR)/year  1.0kL/m2(GLAR)/year

Calculating your water use

To assess your own water consumption against these benchmarks you will need to know the gross lettable area retail (GLAR) of your shopping centre, as defined by the Property Council of Australia Method of Measurement, and annual water consumption.

Office buildings water use benchmarks

We have developed these benchmarks using data from 69 office buildings in the Perth CBD. Compare your water use to see if your site can be more water efficient.

Building type Water cooled
kL/m2NLA/year
Air-cooled
kL/m2NLA/year
Typical - building that hasn't implemented  major water efficiency measures or doesn't have major leaks 0.86  0.71
Mid-range - building with a water management plan & proactive about water efficiency measures 0.75 0.61
Very well managed - building with proactive management & good design 0.61 0.48
Best practice – building with proactive water management & best practice design 0.48 0.35

Calculating your water use

To assess your own water consumption against these benchmarks you will need to know:

  • The net lettable area (NLA) for your office building
  • Your annual water consumption, which you can find on your Water Corporation bill.

Calculation: annual water use/NLA = your performance in kilolitres per square metre per year (kL/m2/year)

If you have retail or food outlets within your office building, please exclude the NLA and water use for these from the calculation.

Broome Shopping Centre case study

Palm trees in car park

Broome Shopping Centre case study

A range of water saving initiatives helped Broome Boulevard cut water use 44%.

Read case study

Garden City Shopping Centre case study

waterwise verge

Garden City Shopping Centre case study

Find out how waterless urinals, WELS rated taps & drip irrigation helped save $67,000.

Read case study

IKEA case study

wrench and blueprints

IKEA case study

Repairing a faulty ball float valve cut IKEA's water use by 24%.

Read case study

108 St Georges Terrace

tall office building

108 St Georges Terrace

Find out how this office tower is saving 14 million litres of water and $33,000 each year.

WA Police

Burst water pipe

WA Police

Leak detection specialists and data loggers were used to identify a leak at the Maylands Police Complex – saving around 3 million litres of water.