Why choose a high-performing building

Business case for green buildings

Staff costs, including salaries and benefits, account for up to 85 to 90 per cent of a company's total expenditure, which when added to energy consumption and rental outgoings has a huge impact on a company's cost base. When it comes to staff attraction and retention, research indicates tenants are placing thermal comfort and indoor air quality second only to public transport proximity in their top workspace priorities.

An overwhelming body of evidence published over the past decade draws a clear link between best practice indoor environment and the savings that can be gained from healthy, happy and productive staff. The following indicative estimates demonstrate the clear benefits of high-performing buildings for tenants and aim to provide evidence to build a business case for choosing a best practice office.

When translating this high-performing building scenario to a 1,000sqm office, it's estimated up to $950,000 could be saved per year.

See full CitySwitch fact sheet >>

The British Council for Offices has produced a Guide to improving the environmental performance of offices that sets out methodologies for measuring the additional benefits from improved environmental performance, including occupant comfort, productivity and well-being.

What defines a high-performing building?

  1. 4.5 Star NABERS Energy rating (minimum)
  2. 5 Star Green Star rating (minimum)
  3. 7 w/sqm lighting power density (maximum)
  4. Proximity to transport and amenities

Indicative savings calculations

The savings calculations below have been based on a hypothetical professional services company located in a 5,000sqm office with;

  • 4.5 Star NABERS energy-rated base building
  • 5 Star Green Star rating
  • best practice lighting power density
  • 333 staff
50% Electricity Savings (from lighting)
see calculations


41% reduced absenteeism (681 less sick days)
see calculations


50% greater employee retention (equivalent to 17 staff)
see calculations


11% increased productivity
see calculations


Total Possible Savings


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