Every sale agreement of a normal South African residential property with a house and its usual outbuildings will contain a voetstoots clause freeing the Seller from any liability for patent and/or latent defects, which the Buyer may later find when taking occupation of the property.
Therefore you should get a buyers agent to assist you, otherwise you have no guarantees. You will find more information on our SA HomeBuyers website athttp://www.sahomebuyers.co.za/property-law-in-south-africa/