Occasionally, when buying a home, the seller states an improvment or addition was done with permits. In most every case I say if it’s important to disclose, it’s important to check out. In San Jose it’s very easy to verify by going to the City of San Jose website and seeing for themselves. Most other cities by now should also have all permits online but if they don’t anyone can go to the city offices and check, it’s public information. Here is the link to San Jose’s on-line permits.