Interior

• Basements might have small horizontal cracks or slight bulging in the walls. If so, request a written guarantee of structural soundness from the builder.
• Crawlspaces should be easily accessible and deep enough to allow a person to inspect under the entire house. The floor should be covered with a vapor barrier to keep out moisture. Check for ample ventilation and insulation.
• Step heights should be uniform; uneven heights can cause dangerous falls.
• Handrails should be securely fastened.
• Floor squeaks might indicate poor construction.
• Cabinets, drawers and doors should glide and close with ease.
• Drywall should appear seamless.
• Ceiling stains reveal leaks. 
• Paint should appear uniform and even.
• Check all electrical switches.
• Faucets should not drip. 
• Tubs and sinks should fill quickly and empty rapidly without gurgling.
• Check the insulation for weather seals around receptacles, pipe entry holes, vents, and other typical problem spots.

Exterior

• Make sure the grading in the yard promotes drainage away from the foundation.
• Gutters and downspout should be even and well sealed. 
• Use binoculars to look for loose or missing shingles on the roof.
• Look for smooth seams and surfaces, filled nail holes and even paint on siding and trim.
• Foundation walls may have some hairline cracks; however cracks that are more than 1/8-inch wide may indicate serious damage.
• Windows should be square and fit tightly without binding when they are opened and closed.
• Attic vents should be unobstructed by insulation or other materials.