PERMANENT residents looking to buy an HDB flat may have to widen their search beyond popular areas as some parts of the island have already reached the limits set out in the new quota system. PRs will not be able to buy flats in certain areas in Jurong West, Choa Chu Kang, Sembawang, Sengkang or Bukit Batok unless they are prepared to pay a premium over the asking price in the hope of enticing other PRs...