Contracting a professional home inspector before buying a home is a good way to ensure that you will not encounter any major problems after you've signed a contract and bought a house.

Then again, official home inspections are only required after an initial contract is signed. It would be better for you to gather your own information about the house you are eyeing. You can go straight to the seller and ask him or her everything about the house. You can also ask for permission to conduct your own mini-inspection.

Most sellers will be open to having you inspect the home well before signing any type of contract, and this gives you some leverage when you are negotiating the final price. Barron's 'Smart Consumer's Guide to Home Buying' encourages all prospective homebuyers to prepare a checklist and note any problems and areas of concern as early as possible. The authors of the book explain that, "If you are thinking about buying a house that will need renovation or upgrading, the more value will be derived from your mini-inspection."

You need a checklist in inspecting the house to ensure that you cover all important aspects that you need to look at. The information you gather from this checklist can then be used to create a written report to help you in assessing the overall condition of the house. Here are some important matters to include in your checklist:

The age of the house - You should know exactly when the house was built. Find out if there are any renovations or upgrades done and when these took place. Ask if blueprints, architect or engineer plans are available.

Examine the foundation of the house - Look for huge cracks or signs of water problems around the house and in the basement. Ask the seller about any flooding issues or other problems related to weather that the house experienced (or experiences) in different seasons.

Examine the interior of the house - Keep an eye for any defects and other potential sources of problems in the interior of the house. Specifically, you need to check if all walls are even with no cracks and if all doors are easily opened and closed. Take a picture of any visible crack, if possible. Check if there are any molds, foul odors and if all water drainages and faucets are working properly.

Check the exterior for defects and potential problems - do all of the windows and doors have adequate insulation? Do they open and close fluidly? Make sure all of the siding, windows and doors are free of cracks and any noticeable wear and tear.

Review heating and air conditioning appliances - ask about the average heating and cooling costs each month, and find out how long the systems have been in place. In some cases, you may need to invest in a new water heater or air conditioning system.

Look at all your notes and create a written report about the condition of the house you just inspected. You may also consider using a digital camera or camcorder to take pictures and videos for a more detailed review in the future. This additional effort may give you an advantage over the seller come negotiation time.

Alexandria P. Anderson is a licensed Minnesota Realtor that uses the Edina real estate listings to help her clients to find and purchase Edina realty and other quality Twin Cities properties.