Since January, residents of Block 46, Owen Road, near Farrer Park, have been enjoying the view from their very own glass lift - the first of its kind in an HDB block.

As part of HDB's Lift Upgrading Programme, four other blocks in the precinct will be fitted with 10 such lifts. They will be ready for use by July.

These lifts are different from conventional ones as they have transparent glass panels along their walls. Instead of being enclosed, they also adopt a shaftless design, which gives passengers in the lifts a view of the outside.

As part of a pilot trial by HDB, bubble lifts will find their way to 19 HDB blocks in areas such as Jurong East Street 24, Buffalo Road in Little India, and Sims Drive in Aljunied.

Depending on the residents' receptiveness as well as the lifts' performance, bubble lifts might eventually pop up all over Singapore.

Bubble lifts are not only attractive for the views they afford, they are also faster to build. It takes about one year to construct a bubble lift, while a conventional lift takes a couple of months more.

Bubble lifts are also cheaper. An HDB spokesman said the design of a bubble lift means there is no need to construct an enclosed shaft, which is required for a conventional lift. This shaves off about 25 per cent of the total construction cost.

This also means a more affordable price for residents. For an eight-storey block of three-room flats like Block 46, Owen Road, each household has to pay only $760, or 5 per cent of the lift upgrading cost. The rest is subsidised by the Government and the town council.

But due to its design, a bubble lift is not suitable for all estates. HDB explained that for places with little shade, it might get too hot in the lift car or the sun's glare might be too strong during the day.

Read the full story in Thursday's edition of The Straits Times.