Potential buyers of new Home Ownership Scheme units may end up buying flats affected by uneven foundations, a member of the Housing Authority claimed. The allegation came as a senior Housing Department official yesterday refused to disclose whether it would sell a home ownership block in Tin Shui Wai's Tin Fu Court where defective piling has been found. Housing chiefs have not disclosed the location of the building since piling problems were discovered in November. Cheng Yao-kong, assistant director (applications and home ownership) of the Housing Department, said: 'The building is safe and we are monitoring the situation.' Housing Authority member Wong Kwun was upset by the department's attitude, saying: 'If they think the building is safe, why not announce the details?' Applications for home ownership flats in phase 21B start today. Offered for sale are 6,840 new flats at Tung Yuk Court in Shau Kei Wan, Rhythm Garden in Choi Hung and Tin Fu Court. The units will be sold at a 44 per cent discount on market value, with the prices ranging from $544,200 to $2,016,500. Prospective buyer Wong Fiu-king urged the department to announce which building had been affected. 'I don't want to buy another unit affected by defective piling,' she said. Her situation is shared by a further 1,500 home buyers, all affected by serious uneven ground settlement beneath five blocks in Tin Chung Court. The Housing Authority promised to refund buyers in September and allow them to buy a new unit in the same district with a price guarantee. 'We have the right to know before making a decision,' Ms Wong said. Tin Fu's piling problems were discovered on November 19. The Housing Department said the fault had been picked up during a routine inspection. It confirmed that three support columns in two sixth-floor flats in separate blocks were found to be thinner than stated in original plans. One theory is that the contractor had used the wrong plans when building the columns.