Here are five ways to evade a costly post-closing catastrophe.

1. Carefully read the listing languageSome properties are listed for sale "as is," but you should simplify if that means the seller is absolutely indisposed to address major safety issues that might come up in an inspection that would make it difficult for them to sell the house to any buyer. If a seller will not put out any money for repairs be cautious and be prepared to move on.

2. Understand your lender's requirementsMany mortgage lenders demand that certain safety issues, such as high radon levels or dangerous structural defects, be addressed before they will offer you a loan.

3. Research the property and seller onlineIf you find a house that's been freshly renovated, check your county's online records to see if the proper building permits were pulled. You want to ensure that all major renovations are up to code.

4. Get a home inspectionWhen you buy a house, always hire your own independent inspector to do a thorough home inspection. This typically costs between $300 and $500. While an inspector might not catch everything, it is an important investment, because problems that spring up later could cost you a lot of money.

5. Evaluate the seller's disclosuresLaws fluctuate from state to state, but generally sellers are supposed to reveal any latent defects -- problems with their property that a standard inspection can't reasonably be expected to reveal. Homebuyers should always ask for repair or renovation information. Remember to be proactive and always ask for documentation.