More hawker stalls and coffee shops are charging higher prices for popular local fare - going by a survey released by the Consumers Association of Singapore (Case).

The price check conducted last year focused on single portions of five common dishes here: chicken nasi briyani, chicken rice, fishball noodles, plain roti prata and a plate of rice with two portions of vegetables and one of meat.

The survey of 514 stalls centres around the mode price, or the most commonly charged price by those checked.

The good news: This remained the same for three out of the five dishes - chicken nasi briyani ($4.50), chicken rice ($2.50) and plain roti prata (80 cents).

The bad news: Diners are less likely to chance upon a $2.50 bowl of fishball noodles, or a $2.50 plate of mixed vegetable rice.

Last year, the most commonly charged price for fishball noodles was $3, up from $2.50 in 2011. The mode price for vegetable rice also went up from $2.50 in 2011 to $2.90 last year.

Prices at hawker centres are on an upward trend across the board.

Out of the 514 stalls checked in total, 58 per cent (314) charged above the 2011 mode price for their dishes. This is up from 39 per cent (239) of the 611 stalls checked in 2011, when the survey was last conducted.