One appraisal principle of value is based on the concept that the more a property or its components are in harmony with the surrounding properties or components, the greater the contributory value. In other words, the more the properties are alike, the more they retain value. This is known as

Conformity

Explanation:

If the house has the same sorrounding and architectural style, similar front and size the value of the hourses increases as they are in armony. While if a house is too much expensive for the the neighboor the appraisal value will be different to one which is in line, as the people with the income ro support that house may not want to live in a house sorrounded with low-income houses

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