Assessors Tax Records
This information is usually compiled from public records gathered from the County Recorders office. Normally these property values are available through Title companies and on web sites such as www.zillow.com.

Advantage: Gives quick Reference.
Disadvantage: Since the data is procured from County tax records, the data consists of all transfer values; many of them may not be actual sales, therefore not indicating true market value. Normally the data is three to six months old and there is a possibility of inaccurate data, as well you have no indication or information as to why a property sold at a much higher or lower sale price.

Comparative Market Analysis (CMA)
This is normally prepared by a real estate agent using the most recent active, pending, sold and expired listings of properties in your area These listings should be similar to your home in square footage, lot size, location, age, and number of bedrooms and baths. Agents take into consideration information mentioned in the ‘Remarks’ column of those listings, which may indicate the condition, upgrades and other features that they offer, all of which may effect the value of the property. This is prepared for sellers at the time of listing and by the buyer’s agent to assist the buyer in determining the offer price.

Advantage: Gives an accurate price range. No upfront cost.
Disadvantage: Requires some work and time on part of real estate agent to prepare a good CMA. Inexperienced agents may not use correct comparables or make appropriate adjustments. Lack of suitable sold comparables.

Appraisal
This is the most common method for pricing homes sold in the resale market, and is done by a professional appraiser at the time of purchase or refinance. An appraisal uses the comparison approach method, in which a price is derived using sold comparables. Based on the type and use of property an appraiser may use other techniques in determining value. An appraiser personally inspects the property, unless it is a drive by appraisal.

Advantage: Required and accepted by lenders. It may be used to reduce property tax values. This is the only type of property valuation wherein the property square footage is measured.
Disadvantage: Requires some work and time on part of an appraiser, as well as it costs money. It does not necessarily identify the best value, but justifies the sale or refinance price using at least three sold comparable.