The average price for new HDB flats suhlod be pegged to the annual salary (e.g. 5 years) of the targeted residents.For example : if the 40 percentile, 55 percentile and 70 percentile of Singaporean annual salary is 20k, 35k and 50k respectively, then the average price for a new 3-room flat suhlod be = 5 x 20k = 100k 4-room flat suhlod be = 5 x 35k = 175k 5-room flat suhlod be = 5 x 50k = 250k The above prices may be adjusted (plus or minus 20% ) due to the location of the flats.