Some conserved shophouses, particularly those of the Art Deco or Modern style, may have reinforced concrete flat roofs. Existing flat roof can be landscaped to add interest to the roofscape. New structures can be added on the existing flat roof, subject to the following guidelines:
(a) Material, Roof Form & Storey Height
The structure can be of reinforced concrete or lightweight material with flat roof and single-storey in height not exceeding 3600mm. A higher height arising from agencies' requirements can be considered for lift shafts. The design and treatment are to be compatible with the architecture of the conserved building.
(b) Coverage
The total coverage of all existing and new structures on the flat roof, including skylights but excluding solar panels and moveable covers e.g. umbrella structures and retractable awnings, cannot exceed 35% of the flat roof area of the unit. All service installations on the roof are to be grouped together and included in the 35% allowable coverage for structure on flat roof.
(c) Setback
The new structure is to be set back a minimum of 3m from the front and side street elevations so that it is not visually obvious from the street. Setback is not required from party wall and backlane.
If the subject unit is higher than the neighbours, setback of the new structure from the common boundary with the neighbouring units is required.
If the subject unit is not higher than the neighbours, setback of the new structure from the common boundary with the neighbouring units is not required.
See Figure 3 (PDF, 0.78 MB)
(d) Railings
To meet technical agencies’ requirements, railings of compatible design and material set back a minimum of 1m from the front façade can be added.
(e) Security Fence
For security and privacy between common boundaries, a metal security fence (anodised / colour coated) or timber screen up to 1800mm from the finished floor level can be added.