I think that there is another thread covering this, but in any case the cost will depend on many factors including the type of pool (above or below ground), if below ground the depth, the type and quality of pool tiles, pumps, lights and so on... I've seen quotes as high as 5.2 - 5.7 jt /m2 for a 5 star resort quality pool, below ground with properly reinforced concrete, 1.5-1.75m in avg depth, slate tiles, high end pumps etc, multiple lights etc but no doubt it can be done for much less, depending upon your requirements.