Designated Exempted Works

Common household renovation works (other than minor works), such as painting, internal plastering or wall-paper works, repair or replacement of internal branch pipe (other than embedded pipe) or sanitary fitment works, are exempted works under the BO.

In addition, 30 Designated Exempted Works are introduced under the Minor Works Control System (MWCS). They can be carried out without prior approval and consent from the Buildings Department nor following the simplified requirements of MWCS.

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Works related to signboard

• Wall signboards
• Display surface of signboards

Works related to domestic units / external wall

• Supporting frames for air-conditioning units or light fittings
• Canopies
• Drying racks
• External renderings, external wall tiles or roof finishes
• Waterproofing layers on roof surface
• Metal supporting frames for the growing of plants
• Metal window security grilles or metal wind guards
• Cat-ladders

Works related to roof / external area

• Solid fence walls
• Mesh fences or metal railings
• Poles
• External metal ventilation ducts or associated supporting frames
• Supporting structures, metal casings for building service installation, ventilation ducts or associated supporting frames (removal only)
• Metal gates
• Glass reinforced polyester water tanks
• Excavation works
• Outdoor planters, ponds or fountains
• Surface drainage channels

Works related to interior area

• Formation of an opening in a floor slab
• Reinstatement of an opening in a floor slab according to the original design