Estimate Home Value Calculator
Home Value Estimate Calculator works out Estimated value and Sales comparison indication from Approach to value, Subject living area and Comparable sale prices. The default figures on this page give estimated value of 400,000; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
4 steps
- Comparable 1: 400000 sold = 400000.
- Comparable 2: 420000 sold = 420000.
- Comparable 3: 390000 sold = 390000.
- Median of the 3 adjusted price(s) = 400000.
Adjusted price of each comparabletable
Time-adjusted price per square foot of each comparabletable
Net adjustment as a share of each sale pricetable
Gross adjustment as a share of each sale pricetable
Its 4 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
4 sources
What the Home Value Estimate Calculator calculates
Estimates a property's value by the three appraisal approaches: adjusted comparable sales, land plus depreciated replacement cost, and rent times a gross rent multiplier, with each comparable's net and gross adjustment reported.
How to use this Home Value Estimate Calculator
Enter Approach to value, Subject living area, Comparable sale prices and Comparable living areas. Estimated value updates as you type, and “Use a worked example” loads checked figures you can adjust. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Estimated value, Sales comparison indication and Price-per-square-foot indication.
The method follows The Appraisal Foundation, Uniform Standards of Professional Appraisal Practice (USPAP) - the sales comparison, cost and income approaches to value, Fannie Mae Selling Guide B4-1.3-08, Comparable Sales, and B4-1.3-09, Adjustments to Comparable Sales - selection of comparables and the requirement to explain large adjustments, Fannie Mae Form 1004, Uniform Residential Appraisal Report - the sales comparison grid this engine reproduces and IAAO, Standard on Mass Appraisal of Real Property - cost approach with age-life depreciation and the gross rent multiplier.
Three comparables adjusted for size and features example
With Subject living area: 2000, Comparable sale prices: 400000,420000,390000, Comparable living areas: 1900,2100,1850, Other net adjustment per comparable: 0,-10000,5000, the calculator returns Adjusted price of each comparable: see result table, Sales comparison indication: 405000, Estimated value: 405000. This example is checked against an independent source in the test suite.
What you can compare
Change one input at a time to see how it affects Estimated value, Sales comparison indication and Price-per-square-foot indication. The inputs you can vary are Approach to value, Subject living area, Comparable sale prices, Comparable living areas, Months since each comparable sold and Other net adjustment per comparable.
Understanding Estimated value, Sales comparison indication and Price-per-square-foot indication
This is not an appraisal and must not be used as one. A lending, tax, insurance or legal decision needs a licensed appraiser working to USPAP with verified sales data.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How do I figure out my home's value?
Estimates a property's value by the three appraisal approaches: adjusted comparable sales, land plus depreciated replacement cost, and rent times a gross rent multiplier. Open “How this is worked out” beside the result to see each step for your own figures.
What is the hardest month to sell a home?
On the figures this page opens with — subject living area 2,000 sqft and size adjustment per square foot 50 — the estimated value is 400,000. No single number fits everyone: change any figure above and the answer updates as you type, with each step of the arithmetic beside it.
How can I calculate the value of my home?
It needs Approach to value, Subject living area, Comparable sale prices, Comparable living areas, Months since each comparable sold and Other net adjustment per comparable. Nothing else is required, and the figures stay in your browser.
What's the most accurate home value estimator?
The Home Value Estimate Calculator follows the stated method, but the result is only as reliable as Approach to value, Subject living area, Comparable sale prices, Comparable living areas and Months since each comparable sold and the assumptions shown. Check the working and sources before relying on it for an important decision.
What information do I need for the Home Value Estimate Calculator?
You need Approach to value, Subject living area, Comparable sale prices, Comparable living areas, Months since each comparable sold, Other net adjustment per comparable, Market change since the sales and Size adjustment per square foot. The page opens with default figures that give estimated value of 400,000, so you can see the scale before entering your own.
What does this Home Value Estimate Calculator show?
It shows Estimated value, Sales comparison indication, Price-per-square-foot indication, Cost approach indication, Income approach indication, Lowest adjusted comparable, Highest adjusted comparable and Estimated value per square foot, with the working and any warnings for your entries.