Adjudication of valuer-certified estimates of value in case of the onset of disputes is conducted through the Experts Councils of valuers' SROs. Official courts tend to concur with the resolutions of such Councils. In some rare instances the imprimatur of SRO's Experts Councils is also required for a valuation done by a particular valuer to enter into effect.
The Federal German Organisation of Appointed and Sworn Experts (Bundesverband Deutscher Sachverständiger und Fachgutachter, abbr. BDSF) is the main professional organization encompassing the majority of licensed appraisers in Germany. In recent years, with the move towards a more global outlook in the valuation profession, the RICS has gained a foothold in Germany, somewhat at the expense of the BDSF. Another German Organisation of Appointed and Sworn Experts is the (Deutsche Sachverständigen Gesellschaft, abbr. DESAG) This organization also includes a large number of licensed appraisers in Germany.
The report must include a street map showing the appraised property and comparable sales used; an exterior building sketch; an explanation of how the square footage was calculated; photographs of the home's front, back and street scene; front exterior photographs of each comparable property used; and any other information, such as market sales data, public land records and public tax records, that the appraiser uses to determine the property's fair market value. An appraisal costs several hundred dollars, and generally, the borrower pays this fee.
The leading appraisal organization for personal property valuation is the American Society of Appraisers which is a sponsor member of the Appraisal Foundation and awards the ASA (Accredited Senior Appraiser) designation to candidates who complete five years of documented appraisal experience, pass a comprehensive exam along with required commercial and/or residential appraisal coursework, and submit two appraisal reports for review.
Real estate appraisal in Germany is partly codified by law. The federal Baugesetzbuch (abbr. BauGB, "German statutory code on building and construction'") contains guidelines on governing authorities, defines the term market value and refers to continuative rules (chapter 3, articles 192 ff.). Each municipality (city or administrative district) must form a Gutachterausschuss (appraisal committee), consisting of a chairman and honorary members. The committee gathers information on all real estate deals (it is mandatory to send a copy of each notarial purchase contract to the Gutachterausschuss) and includes it in the Kaufpreissammlung (purchase price database). Most committees publish an official real estate market report every two years, in which besides other information on comparables the land value is determined. The committees also perform appraisals on behalf of public authorities.
The scope of work is the first step in any appraisal process. Without a strictly defined scope of work, an appraisal's conclusions may not be viable. By defining the scope of work, an appraiser can properly develop a value for a given property for the intended user, and for the intended use of the appraisal. The whole idea of "scope of work" is to provide clear expectations and guidelines for all parties as to what the appraisal report does, and does not, cover; and how much work has gone into it.
The various U.S. appraisal groups and international professional appraisal organizations have started collaborating in recent years towards the development of International Valuation Standards. This will facilitate global real estate appraisal standards, a much-needed adjunct to real estate investment portfolios which cross national boundaries. Some appraisal groups are already international organizations and thus, to some extent, already incorporate some level of global standards.
Automated valuation models (AVMs) are growing in acceptance. These rely on statistical models such as multiple regression analysis, machine learning algorithms or geographic information systems (GIS). While AVMs can be quite accurate, particularly when used in a very homogeneous area, there is also evidence that AVMs are not accurate in other instances such as when they are used in rural areas, or when the appraised property does not conform well to the neighborhood.
The notice shows property owners their just, assessed and taxable values for the prior and current years. It also provides a comparison of the prior year taxes for each taxing authority to the current proposed property taxes. Exemptions and reductions in value due to assessment caps are provided, along with any non-ad valorem assessments. Current year taxes are based on property values, tax exemptions and the proposed tax rate that has been set by the taxing authorities.