In the United States, appraisals are for a certain type of value (e.g., foreclosure value, fair market value, distressed sale value, investment value). The most commonly used definition of value is Market Value. While Uniform Standards of Professional Appraisal Practice (USPAP) does not define Market Value, it provides general guidance for how Market Value should be defined:
Onsite appraisals of antiques or residential contents are usually done to appraise multiple items. The average onsite appraisal of an entire home’s contents or collections generally takes 3-4 hours for the onsite evaluation and typically an equal amount of hours off site for research and report development. This is an estimate only. The time spent on site is dependent on multiple factors (please see preparing for an on site appraisal)
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).
You may ask when is an appraisal service needed? Appraisals are generally required whenever real property is sold, mortgaged, taxed, insured, or developed. In most countries, appraisers are required to be licensed and certified to properly value property and land. So if you are looking to purchase a home in the near future you will notice that your bank will order an appraisal to value the property to make sure that it's worth the value that you are borrowing from them.
Unlike appraisers, assessors have no federal requirement for certification. In states that mandate certification for assessors, the requirements are usually similar to those for appraisers. For example, the International Association of Assessing Officers (IAAO) offers the Certified Assessment Evaluator (CAE). This designation covers topics that include property valuation for tax purposes, property tax administration, and property tax policy. Applicants are required to have a bachelor's degree prior to obtaining the designation.
The International Valuation Standards Council (IVSC) is a non-governmental organization (NGO) member of the United Nations with membership that encompasses all the major national valuation standard-setters and professional associations from 41 different countries (including the Appraisal Institute, the American Society of Appraisers, the RICS, the [Practising Valuers Association of India] and the Appraisal Institute of Canada). IVSC publishes the International Valuation Standards (IVS), now in its 8th edition.
After a lot of phone tag (due to my availability, not John's), he finally got me on the phone. We talked about what I was looking for, and John talked to me about the general process of appraisals for PMI evaluation, and the availability of those reports. He was open and honest and took his time to help me understand, knowing he was turning away a potential customer. In this day and age, it's so hard to find someone with the ethics necessary to turn away a potential customer. And as such, he has definitely earned my respect and future business (as well as my highest recommendations.
Appraisal practice in the United States is regulated by state. The Appraisal Foundation (TAF) is the primary standards body; its Appraisal Standards Board (ASB) promulgates and updates best practices as codified in the Uniform Standards of Professional Appraisal Practice (USPAP), while its Appraisal Qualifications Board (AQB) promulgates minimum standards for appraiser certification and licensing.