For single family homes, there are two basic methods used in real estate appraisal. They are replacement cost analysis, and using comparable sales. A third appraisal method, based on capitalization, is used for income properties, and is covered in another article.

In figuring replacement cost the question is: What would it cost to buy this land and put this house on it? If the land (improved) would cost $40,000, and the house could be built for $150,000, the value indicated would be around $190,000 – if the house is fairly new. If it has used up 10% of its useful life, you can deduct $15,000 for depreciation.
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Real estate valuation for single family homes is typically done by using comparable sales. With income properties this just doesn’t work well. Imagine if you are looking at a 24-unit building. It would be difficult to find similar ones nearby that have recently sold.

It’s also not ideal to use replacement costs for income property appraisal. How do you figure replacement cost if there is no land for sale nearby with proper zoning? This is used as a secondary method, though, and can tell you if maybe you should be building instead of buying.

Real Estate Valuation By Cap Rate

Income properties are bought for the income. Income, then, is what is used to determine value. The rate of return investors in a given area expect gives you the capitalization rate, or “cap rate” for the area. This is what you use to accurately appraise an income property. Below is a somewhat simplified explanation.
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