How Much Does 石屎剝落修復 Cost in Hong Kong?
Hong Kong market reference price
Spalling concrete repair in Hong Kong costs HK$8,000–$180,000, depending on the extent of spalling, location (external wall, ceiling, structural column), and whether scaffolding is required. Minor patch repairs are at the lower end; large-scale external wall works requiring scaffolding reach the upper range.
Spalling Concrete Repair Cost Reference
(Prices may be higher for premium-tier cases)
* Prices are market reference ranges. Actual costs may vary.
If rebar is exposed, don't delay — rust spreads along the steel and can cause large-scale concrete failure, multiplying repair costs. Treat exposed rebar with anti-rust compound immediately before patching.
Frequently Asked Questions
Spalling alone may not indicate immediate structural danger, but exposed and rusting rebar will progressively weaken load-bearing capacity. Early assessment by an Authorized Person is recommended before the situation worsens.
Internal patch repairs generally don't require permits. External wall works typically need to be notified to the Buildings Department. Large-scale or structural repairs may require a Minor Works submission or supervision by an Authorized Person.
Under Hong Kong law, external wall spalling repairs are classified as minor works. Depending on scale, a Registered Contractor (RC), Authorized Person (AP), or Registered Structural Engineer (RSE) may be required. For works under the Mandatory Building Inspection Scheme (MBIS), an AP must supervise and sign off, submitting a completion report to the Buildings Department.
If the spalling is on common areas (e.g. external walls, roof), repair costs are typically borne by the Owners' Corporation or management company, apportioned among owners by share. Spalling within private units is the individual owner's responsibility.
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