Comparable Sales Valuation Calculator

Work out comparable sales valuation instantly with clear inputs, formula shown and shareable results.

About Comparable Sales Valuation Calculator

The sales comparison approach values a property from the rates achieved by similar recent transactions. Averaging three comparables gives the central estimate, while the lowest and highest rates bracket a defensible range. A wide spread signals that the comparables are not truly comparable and need adjustment.

Formulas

Comparable value

Value = average comparable rate per ft² x subject area

Range

Low and high values use the lowest and highest comparable rates

Worked example

With the default values below, Comparable Sales Valuation Calculator returns Indicated value of $6,300,000.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Comparable 1 rateminimum 0 per ft²: 4,200 per ft²
Comparable 2 rateminimum 0 per ft²: 4,500 per ft²
Comparable 3 rateminimum 0 per ft²: 3,900 per ft²
Subject property areaminimum 0.1 ft²: 1,500 ft²

Results

Indicated value: $6,300,000.00
Average comparable rate: $4,200.00
Value at the lowest comparable: $5,850,000.00
Value at the highest comparable: $6,750,000.00

Step by step

1Values used
2Comparable value
3Range
4Indicated value= 6,300,000.00
5Average comparable rate= 4,200.00
6Value at the lowest comparable= 5,850,000.00
7Value at the highest comparable= 6,750,000.00

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Comparable Sales Valuation figure worked out?

Value = average comparable rate per ft² x subject area. The sales comparison approach values a property from the rates achieved by similar recent transactions.

What adjustments should be made to comparables?

Location, size, age and condition, floor level, view, and time since sale. Each is applied as a percentage to bring the comparable to the subject's characteristics before averaging.

What values do I need to enter?

This calculator takes 4 inputs: Comparable 1 rate, Comparable 2 rate, Comparable 3 rate, Subject property area. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.