PropeteerProperty intelligence

Property value guide

Price per square foot explained

Price per square foot is sale price divided by reliable internal floor area. It is useful for similar homes in the same micro-market, but it becomes misleading when floor areas, condition, tenure or property types are not comparable.

Written and reviewed by Propeteer Research TeamPublished Reviewed

At a glance

Key facts

Calculation
Sale price ÷ internal floor area
Best use
Similar homes in the same local market
Main risk
Unmatched or missing floor-area records

A reliable process

How to approach the question.

  1. 01Use a consistent floor-area measure and record its source.
  2. 02Match the certificate or record to the exact sold property.
  3. 03Compare like property types and tenure.
  4. 04Use the median of eligible evidence and show exclusions.

Worked example

A flat in a mixed building

A penthouse, a compact one-bedroom flat and a lease with unusual terms can trade at very different rates. Building-level proximity does not remove the need to compare size, floor, condition and tenure.

What this does not prove

  • Smaller homes often sell at a different rate than larger homes.
  • External area, parking, lease terms and outlook are not captured by the division.
  • EPC floor area may not match another survey standard.

Method used

  • Resolve the property identity before joining sales, certificates, floor area and local market evidence.
  • Prefer recent completed sales of genuinely comparable homes and explain each adjustment rather than averaging every nearby transaction.
  • Use a range and reduce confidence where the evidence is sparse, contradictory or dependent on unverified property characteristics.

Primary sources and official guidance

Price Paid DataHM Land RegistryEnergy Performance of Buildings DataDepartment for Levelling Up, Housing and Communities

Source scope, licensing, refresh expectations and known limitations are listed in the public data-source register.

Related guides

How to value a property using comparable sales

Select, adjust and reconcile UK comparable sales by recency, location, property type, floor area, condition and tenure.

Why floor area or EPC data may be missing

Learn why a recent sale may not have a matchable EPC and how address differences, exemptions, timing and property subdivisions affect floor-area evidence.

Apply this guide

Start with the exact UK address.

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