ABSTRACT
The economic viability of a commercial office retrofit is a function of the return on the capital investment. Often retrofits only consider the aesthetics of a building and in these cases the return is realised by an increase in revenue from reduced vacancy rates. Predicting the return on the investment in these cases is more of an art than a science as aesthetics can be so subjective. In contrast, when a building retrofit involves the upgrade of the façade and services, it is the building performance that is affected. And this performance can have an impact on the occupant comfort as well as the demand and consumption of utilities such as electricity and water.
