Primarily, it is the VETERAN that gets approved.
The houses do not get Pre-Approved like they do for FHA.
Once you get your Certificate of Eligibity, you will find a house you like and make an Offer.
Then you will get a Lender-Approved, VA Approved Inspector to evaluate the property: The Inspector will find things and either those things are acceptable to the VA Guideleines, or they will not.
Most of the things that are unacceptable, are unaccesptable to FHA also; Health and Safty issues.
Go into your VA Office and talk to them; they are there to help you; they will have a brochure on what is acceptable and what is not. (You might find it on-line too at veteransadministration.gov)
thanks for serving
Good luck and may God bless