Plot Ratios and Site Coverage

Building Control

The Plot Ratios and the Site Coverage are controlled under the BO according to the First Schedule of the Building (Planning) Regulation.

 

Site Coverage

Area of site covered by the building.

May have 100% for buildings with height not exceeding 15 m.

Refer to CAP123F- Building (Planning) Reg20.

 

Plot Ratio

Ratio of Total Gross Floor Area to Site Area.

Sites are classsified into Class A, B & C depending on the degree of "openness". The more open the site, the higher the density of development permitted.

Refer to CAP123F- Building (Planning) Reg21

 

Class A Site : abuts on one street not less than 4.5 m wide.

Class B Site : abuts on two streets neither of which is less than 4.5 m wide.

Class C Site : abuts on three streets not less than 4.5 m wide.

 

Calculation of GFA

Gross Floor Area to be included

  • areas enclosed within the external walls, staircases, corridors and balcony, internal walls, service ducts, lift shaft etc.
  • in general, all covered "Areas" within the site.

Gross Floor Area to be Excluded

  • loading and unloading areas
  • permitted car park and driveway
  • lift machinery and equipment
  • air conditioning plant rooms
  • sewage treatment plants rooms
  • other services : e.g. water tanks, boiler rooms, transformer rooms, chimneys shaft, refuge floors, refuse chutes and storage chambers
  • recreational facilities
  • others : counters, offices, stores, guard rooms, and lavatories for watchmen and magement of staff provided only in common areas and not excessive
  • bay windows (calculated separately)

 

 

 

 

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