How to use price per square foot
Price per square foot answers one question fast: is this home priced in line with its neighbours once you account for size? Enter the subject property, then add closed sales that a buyer would actually consider.
- Enter price and size. The per-foot figure updates as you type, so you can test a few listings in seconds.
- Add up to three comps. Use closed sales from the last six months that are within 20% of your subject size.
- Read the spread. The comparison shows how far your number sits above or below the comp average, plus the value your size would carry at that average.
- Adjust for what is different. Condition, lot, view, and renovations are not in the math. Use the result as a starting point, then adjust line by line.
What moves the number
- Condition - A renovated kitchen or new roof can push a home above its neighbours without changing the square footage.
- Lot and location - Lot size, traffic, view, and school assignment sit outside the per-foot math but move price more than an extra bedroom often does.
- Measurement basis - County records, appraiser sketches, and builder plans rarely agree. Pick one source and apply it to every home in the comparison.
- Age and systems - Two homes of the same size can differ by decades of deferred maintenance, which shows up as a per-foot gap that has nothing to do with layout.
Frequently asked questions
How do you calculate price per square foot?
Divide the sale or asking price by the finished square footage. A $450,000 home with 2,000 square feet works out to $225 per square foot. Keep the measurement basis consistent: if one home is quoted with basement space and another is not, the comparison is meaningless.
Where should I measure square footage from?
Use the county record or the appraiser sketch for the main living area, and treat finished basement, garage, and unheated space separately. Agents in the same market usually rely on the same source, so quoting county square footage keeps every comp on an even footing.
Is price per square foot the same as value?
No. It is a screening number, not an appraisal. Two homes of equal size can differ by tens of thousands of dollars on condition, lot, view, layout, and school assignment. Use the per-foot figure to spot outliers, then adjust for the differences that actually drive your market.
Why does price per square foot fall as homes get bigger?
Land, kitchens, and systems cost roughly the same regardless of size, so a large home spreads those fixed costs over more feet. Extra bedrooms and bathrooms add value, but each additional foot usually sells for less than the first ones.
How many comps should I use?
Three to five closed sales within the last six months, in the same subdivision or a genuinely similar one, is the usual standard. Newer sales beat distant ones, and a tight size band - within 20% of your subject - keeps the per-foot comparison honest.
Does price per square foot include the lot?
The calculation only divides price by building size, so the land is baked into the result without being visible. A home on a double lot will show a high per-foot number for its size; that premium belongs to the lot, not to the house.
Estimates for planning only. Price per square foot is a screening tool, not an appraisal. Confirm square footage and value with a licensed appraiser or your local multiple listing service.
