In the course of evaluating a property, an appraiser is expected to be alert and take notice of aspects and characteristics of the property, as well as the surrounding area, that could affect the value. This can include assessing the overall noise levels of the area, proximity to sources of recurring loud disturbances such as an airport or a railroad line, as well as the view offered by the property. Obstructions by neighboring buildings, for instance, could reduce the value of a property.
In a commercial income-producing property this approach capitalizes an income stream into a value indication. This can be done using revenue multipliers or capitalization rates applied to a Net Operating Income (NOI). Usually, an NOI has been stabilized so as not to place too much weight on a very recent event. An example of this is an unleased building which, technically, has no NOI. A stabilized NOI would assume that the building is leased at a normal rate, and to usual occupancy levels. The Net Operating Income (NOI) is gross potential income (GPI), less vacancy and collection loss (= Effective Gross Income) less operating expenses (but excluding debt service, income taxes, and/or depreciation charges applied by accountants).
In 2011 to 2015, the number of Registered Valuers in New Zealand has generally between only around 900 to 950 each year. This is an ageing 'top heavy' professional with difficulty retaining new and young members due to pay, work stress and the recent advent of 'clearing houses' for banks to order valuations for mortgage purposes. The clearing houses have largely ended the long-standing local practice of members of the public seeking advice directly from a valuer. The use of electronic estimates based on Rating Values (Local Government mass appraisal for levies) is also leading to a reduction in standard valuation work and is significantly affecting the viability of small valuation businesses. The profession is in the process of a wider corporate re-structuring of the valuation market due to these factors with various perceptions within profession as to the merits of the events of the last five years.