As I know, not the entire of the 200 acres land was ex-mining land.
I was conservative abt ex-mining land few years back but not really since 1-2 years ago, same goes to leasehold after I attended few foreign countries seminars.
I think Malaysians had started for a change of their conservative mind set of ex-mining land. Previous projects were sold really slow but not all, ex. Desa Park City. Desa Parkcity back then, abt more than 10 years ago was an ex-mining land which most developers refuse to buy due to hard mine may cause the land unstable with housing development. No one comfortable with it and the land took time to sell until PPC tender it after one company rejected the initial verbal agreed deal. PPC proved a lot of ppl wrong with its high price prop but with concept dev of DPC, which is yet to rival by many projects.
Since 1-2 years ago, the good location projects with ex-mining land sold very well as the neighbourhood is getting matured n fully developed. Example, Lakeside Residence Puchong received huge demand and keep on ballot and ballot even the high price n the early phase houses were crap. Also, USJ 1 is another example like USJ One Park, Empire Remix and etc.
Location, concept development, amenities blended with the prices are more important for most Malaysians now.
It depends on what mining u r referring to...if ex tin mine land like lake edge is different..cos ex tin mine u will soft soil and soil settlement issue later...fill soil type of land also have similar soil settlement issue ..eco park, kota kemuning
south Quay and Dpc is sitting on ex Quarry land...hard rocks everywhere..some parcel of land only need minimum pilling and think some almost dun need pilling at all ..there will no issue at all in fact the foundation of these building sitting on top will be more solid than others