You will have to pay a stamp duty of 7.5 per cent. You also will have to pay buyer's stamp duty on top of the regular stamp duty, which is charged at a flat rate of 15 per cent. That's means you will have to pay a total levy of nearly HK$4.28 million.
You will also be subject to special stamp duty if you sell within three years: if you resell your flat within six months of its purchase you will have to pay 20 per cent of the selling price; if you hold the flat for more than six months but less than 12 months, the rate is 15 per cent; if you sell your flat after more than 12 months but less than three years, you will have to pay duty at a rate of 10 per cent.
You could consider the three-bedroomed flats at City One Shatin or Yoho Town in Yuen Long. You could also consider the three-bedroomed flats at Kingswood Villas in Tin Shui Wai or Belvedere Garden in Tseun Wan.