Here are a few points to consider.
Exterior condition Look at the condition of the roof, eavestroughing, brick, mortar, paint, siding, decks and patios.
Energy efficiency What type of heating and insulation does the home have? Is the entire house insulated?
Does the house smell clean and fresh? Check for conditions and materials which will maintain a healthy indoor environment.
Basement/crawlspace conditions Is it moldy? Look for water stains, leaks or cracks.
Structural problems Doors and windows that stick and uneven floors can indicate problems.
Test the water pressure by turning on the taps or flushing the toilet.
Is there parking? Does the home have a private or shared driveway?