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Chapter 7 : Utility Services

Utility services are essential components of the basic infrastructure. The planning of their provisions should be well coordinated and integrated into the overall planning of new development areas such that a coherent and aesthetic design can be achieved.

Their planning standards are summarized below :-

Types of Utility


Site Area Required

Minimum Width of access

Minimum safe
working clearance

Maximum gradient of access

Electricity Supply
Extra High Voltage Substations
(Switching Stations)
6 500m2
(100m x 65m)


200m away from the nearest fence of any telephone exchange, radio- communications and broadcasting installations

1 in 12

Bulk Infeed Substations
(Switching Stations)
(a) in CLP Power network
(b) in HEC network:
(i) 275kV/132kV Station
(ii) 275kV/132kV Station (with 2 x 300MVA 275/132kV transformers)
2 870m2
(70m x 41m)
1 504m2
(32m x 47m)
2 550m2
(30m x 85m)
1 in 10
1 in 10
1 in 10
Primary Substations
(Zone Substations)
(a) in CLP Power network
(b) in HEC network
1 705m2
(55m x 31m)
1 600m2
(40m x 40m)
1 in 10
1 in 10
Consumer's Substation (Distribution Substation)
(a) Outdoor Type
(b) Indoor Type
(5.5m x 5.5m)
(8.5m x 6m)
Overhead Transmission Lines
(a) 400kV
(b) 132kV
(c) 33kV
(d) 11kV

6m emergency vehicular access; may be required to reach the principal face of any adjacent building development for fire fighting purpose

Horizontal : 5.5m
Vertical : 7.6m
Horizontal : 3.7m
Vertical : 6.7m
Horizontal : 2.8m
Vertical : 6.1m
Horizontal : 2.8m
Vertical : 6.1m
Underground Cables no set standard
minimum separation between power cables and telephone cables is 0.3m wherever practicable.
Gas supply no set standard
the advice from the EMSD (Gas Standards Office) should be sought.
Telephone Services
Telephone Exchange
(a) local exchanges in rural areas with <10 000 lines
(b) local exchanges in urban area with 20 000 -
60 000 lines
(c) local exchange in urban areas with up to 120 000 lines or combined local/ tandem exchanges or telephone exchange complexes
1 000m2 - 1 500m2
1 500m2 - 2 000m2
at least 200m from any power generating station, bulk infeed substation or primary substation


Telephone cables a minimum separating distance of 2.5m from the nearest Light Rail Transit System and 300m from Kowloon Canton Railway System.
Radio Telecommunications and Broadcasting Services no set standard
reference should be made to the "Procedure for Applications to Use or Develop Hill-top and Rural Sites for Radio-telecommunications Systems" issued by OFCA.
Water Supply
(a) service reservoirs
  • as near as possible to the area served
  • at level where water can be fed by gravity to the supply zone
(b) pumping stations



  • reasonable proximity to the source of supply
  • adequate vehicular access
  • away from noise sensitive uses
  • sea water intake of salt water pumping stations should have a minimum 100m clear distance from marine activities and drainage outfalls.
(c) water treatment works
  • comply with the procedures laid down by the Coordinating Committee on Land Use Planning and Control related to Potentially Hazardous Installations
(d) water mains
  • normally placed underground and routed along carriage ways
  • adequate separation from power cables and other services
Drainage Services
(a) foul sewerage system


  • under carriageways, footpaths, or cycle tracks.
  • gravity sewerage system is preferred
(b) stormwater drainage system
  • collected and conveyed in enclosed drains or open channels
(c) pumping stations and sewage treatment works
  • with design to minimise noise, odour and visual problems
  • away from residential or other sensitive areas
(d) polder drainage and stormwater pumping schemes
  • at lowest areas of the schemes
  • covered or properly fenced off
(e) drainage reserves
  • structures not permitted
Dedicated Utility Reserves
  • outside road reserves
  • adequate separation between different kinds of utility provisions



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 Last revision date : June 2015