Short answer：Saleable and gross area are different measures. Use the same definition for price-per-area comparisons; there is no fixed conversion percentage for every building.
Check the source
The first-hand residential statutory definition includes a balcony, utility platform and verandah forming part of the property, but excludes specified items such as bay windows, roofs and gardens. Gross-area figures can use different allocations and need a stated definition.
Add plans and measurements
An area figure alone does not establish furniture fit. Inspect walls, columns, openings and circulation. Record rights over roofs, parking or gardens separately rather than silently adding them to the price-per-area denominator.
Before deciding
- Record figures and definitions
- Compare documents with the actual flat
- Distinguish use from ownership
Sources and method
Sources support the specific rules described. Checklists and hypothetical calculations are editorial explanations, not measured market results or individual approvals.
Revision：Removed unsupported experience, case outcomes and statistics; corrected the topic-specific rules and limitations described above.
Scope：General information only, not personalised legal, tax, immigration, admissions or investment advice.