What is the value of world real estate?

In the UK, real estate appraisal is known as property valuation and a real estate appraiser is a land valuer or property valuer (usually a chartered surveyor who specialises in property valuation). Property valuation in the UK is regulated by the Royal Institution of Chartered Surveyors (RICS), a professional body encompassing all of the building and property-related professions. The RICS professional guidelines for valuers are published in the Red Book.