Greetings to the community

I could use some guidance on what the CPA says about the following situation:

Purchased a house via an estate agent, sale went through on November 2010.

Now, March 2012 we discover that there possibly may be some structural problems with the foundations to the house, causing the house to sink.

1) As our purchase took place after the CPA came into force, does the sale of our house fall under any regulations of the Act.
2) If so, are we able to take this matter up with the estate agent or seller of the house as this information was not disclosed to us.
3) If not, what other recourse do we have in this matter?

Any assistance would be greatly appreciated.