Finance category
Mortgage, loan, investing, tax, and money calculators.
Price Per Square Foot Calculator
Compute the subject property's price per square foot and compare to up to three comparable sales. Use the comp-average PSF times subject square footage as an indicated market value.
Subject property
Comparable sales
Subject price / sf
$266
Comp average price / sf
$264
range: $263–$266
Indicated market value
$480,270
subject sf × avg comp psf
Delta vs current price
-$4,730
may be overpriced
How to use it
PSF is a fast valuation reasonability check. Always pair with adjustments for condition, location quality within the neighborhood, lot size, and major features (garage, view, ADU).
Smaller homes typically command higher PSF than larger homes because shared overhead spreads across less square footage. When comparing PSF, pick comps within roughly 20% of the subject's size.
How to Use
- Enter the subject property's sale price (or list price) and square footage.
- Enter price and square footage for up to 3 recent comparable sales.
- Read the subject PSF and the comp range.
- Compare the indicated market value (avg comp PSF × subject sf) to the listed price.
Frequently Asked Questions
Is PSF a reliable valuation method?
It's one tool. PSF works as a sanity check but doesn't account for location quality within a neighborhood, condition, lot size, or features (garage, ADU, view). A formal appraisal makes adjustments line by line.
Why does PSF vary by home size?
Smaller homes have higher PSF because shared overhead (kitchen, bath, mechanicals, foundation) spreads across less square footage. Compare to comps within ~20% of subject size for cleaner comparison.
Should I include outdoor square footage?
Standard PSF uses livable interior square footage. Lots, decks, garages, and basements are usually valued separately or via condition/feature adjustments rather than rolled into PSF.
Do appraisers use PSF as their primary method?
No — they use the sales comparison approach with line-item adjustments, then back-check with PSF. PSF is the quickest gut-check but rarely the final answer.
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