How does a Realtor figure out the best price when selling a home? How does a seller know if a home purchase is a good deal? Comps.
Comps, or comparable homes, are used by Realtors, sellers, buyers, lenders and appraisers to determine a home’s value. Comps are pulled for both homes currently on the market and recently sold homes.
But what data is included when considering comps? How do you know if you’re comparing “apples to apples,” as they say? These are the factors you should consider:
Price – When determining a home’s value, it’s important to look at the final sales prices of similar homes that sold in the past three months (not just the prices that homes are currently listed for). The final sales prices show what such a home could actually sell for in the current market.
Age of house – The age of a home is important, as the potential need to fix major items such as a roof or plumbing should be taken into consideration.
Features – Also look for the presence or absence of similar characteristics, such as chimneys, decks, walk-in closets and oversized bathtubs. And don’t forget about upgrades. Even though a house may be 20 years old, the insides may not be. Did the previous owners renovate a kitchen to include today’s hottest features? Were new energy-efficient features installed throughout the house (such as appliances and insulation)?
Size – This includes the number of bedrooms and baths, additional rooms such as a study or playroom, number of garages, and lot size.
Square footage – Cost per square foot is an important measure in determining a home’s value. For example, if your home’s value per square foot is $250 and the average per square foot of nearby similar recently sold homes is $275, it shows that your home is valued less per square foot than nearby similar homes.
Elevation features – This includes brick, siding, gables, and more. Brick homes are typically worth more than others.
Foundation – Is the home built on a basement or slab? Homes on a basement are typically valued higher because there is more room for expansion.
By analyzing the comps – including the current competition and actual sales prices – sellers can appropriately price their homes to make them an attractive option, and buyers can know that they’re getting a fair deal on a purchase. A Realtor can help buyers identify home sales that are truly comparable and interpret the information about them.
“How to select a comp” is part of NRT’s podcast series. To hear this podcast or another podcast focused on home buying, please click here.

A comparable property should be a “reasonable alternative purchase to the subject”. That was taught to me when I started appraising in ’89 and it’s still the acid test.