Measurements
How Accurate Are Floor Plans?
How accurate are floor plans?
Floor plan accuracy depends on how the property was measured. Plans from a measured survey are most accurate; plans from sketches are accurate to the dimensions provided. For marketing, a to-scale plan is usually sufficient; for compliance or valuation, area should be measured to a recognised standard such as GIA or NIA.
What affects accuracy
Several factors determine how accurate a finished plan is.
- How the property was measured (survey vs sketch)
- The quality and clarity of source measurements
- Whether the plan is drawn properly to scale
- The area standard used for calculations
Marketing accuracy vs compliance accuracy
The level of accuracy you need depends on the purpose.
For marketing
A plan drawn to scale from sensible measurements is generally fine. The goal is to communicate layout clearly.
For compliance and valuation
Area should be measured to a recognised standard, ideally from a measured survey, with stated tolerances.
How to improve accuracy
Provide accurate measurements, state the area standard and scale on the plan, and use a measured survey where precision matters. Always confirm figures before relying on them for lending or compliance.
Frequently asked questions
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