Common in Causeway Bay
older mid-rise units have AC condensate drains running through ceiling cavities; blockage causes ceiling stain from upstairs.
Pre-call checks
1. Turn off AC immediately if you see ceiling stain spreading — stops further damage.
2. Photograph the stain pattern + timestamp — useful for diagnosis + insurance.
3. Check if downstairs neighbour also reports drips — if yes, building-side manifold issue (different scope).
What we do on a Causeway Bay call
Source-locate first
We identify whether the blockage is in your in-flat drip line, the wall-cavity routing, or the shared manifold. Different fixes. Different costs. Diagnosis prevents charging for the wrong work.
Causeway Bay pricing
Starting HKD 800 for in-flat AC condensate drain clearing in Causeway Bay (residential, standard split unit). Includes 2-hour typical response, drip-line mechanical clear, ceiling-cavity check, before/after photos.
30-40 min HK Island typical window. NT +HKD 50.
Wall-cavity or shared-manifold work: separate quote after on-site assessment + OC sign-off (if shared), typically HKD 1,500-3,500.