Some tips from my recent nightmare house purchase.
1. Get the approved plans up front. If they don't have them, make sure that it's a clause in the Offer to Purchase (and make sure you give them a deadline to provide the plans otherwise it's not really binding)
2. Make sure that you get the 'extended' rates figures from the council. The council will issue a Rates Clearance Certificate even if there are debts older than two years.
3. Make sure the seller is not so heavily in debt with the bank that their bond exceeds the sale value of the property. YES, this happened to me and delayed the transfer by months as we had to wait for the seller's bank to accept an acknowledgement of debt from the seller.
4. Make sure there is water pressure in the taps when first visiting the house.
5. Check for damp.
6. Make sure you list the fixtures you want to receive 'in working order' in the Offer to purchase. Gates, Garage door, Geyser, Oven, Stove. etc.
7. Make sure there is sufficient parking.
8. Go for a house which has as much privacy as possible and check out what the neighbors are like. ie. you don't want to move next door to a bunch of students.
9. TAKE PICTURES when viewing the house.
10. Buy the cheapest house in the best area.