The sales comparison approach (SCA) is a real estate appraisal valuation method that relies on the assumption that a matrix of attributes or significant features of a property drive its value. For examples, in the case of a single family residence, such attributes might be floor area, views, location, number of bathrooms, lot size, age of the property and condition of property. This method is in contrast to the two other main pricing methods for real estate which are cost approach and income approach.