Zoning and Construction
The Difference Between Gross, Net and Gross-with-Common-Area Square Meters
Which square meter figure is in the listing? We explain the difference between net area, gross area and gross area including a share of common areas, and how to compare price per square meter correctly.
2 min read
For the same unit, the figures 'net 90', 'gross 110' and 'gross 125' square meters can all be correct at once. The difference lies in which areas are counted. If you don't use the same definition when comparing price per square meter, you might mistake an expensive home for a cheap one.
Definitions
| Term | What it covers | Typical ratio |
|---|---|---|
| Net area | The usable area between the unit's interior wall surfaces | The base measure |
| Gross area | Net area + the area of interior and exterior walls + (usually) balconies | Roughly 10 to 20 percent more than net area |
| Gross area including common-area share | Gross area plus a share of common areas such as stairs, corridors and the elevator | Can run 20 to 35 percent more than net area |
Why does it matter?
- Price per square meter looks lower if calculated on gross area, and higher if calculated on net area.
- In gated complexes and residence-style buildings, common areas are larger, so the gap between gross and net widens.
- The most consistent comparison for rental and sale valuation is based on net area.
The area on the title deed
The area shown on the title deed record is usually the parcel's area, not the unit's. A unit's area appears in the approved architectural project and in some construction-servitude records. To find the exact net area, you can check the approved project or have an on-site measurement done.
This content is for general information only and is not a substitute for legal, financial or tax advice. Rates, amounts and legislation can change over time. Confirm current information with the relevant authority or a professional before proceeding with a transaction.