One of the biggest impacts on real estate values is the local crime rate. The higher the crime rate, especially violent crimes, the lower the property values tend to be. Los Altos has an extremely low crime rate, especially violent crimes. However, it isn't up to your Realtor to simply tell you so. You have to do the homework.
So, to make it easy I've selected two of the best sites for crime statistics and provided links for the three closest cities. As you'll see from the data, we're pretty safe around here.
NeighborhoodScout.com shows the crime rates as well as a nice map feature that shows where the safest neighborhoods are.
CrimeReports.com shows specific crimes by the location at which they occurred which is handy for anyone wanting more detail.
Of course, you can always visit the Los Altos Police Department online for information as well.
Crime Reports.com for Los Altos
Los Altos Hills
Crime Reports for Los Altos Hills
Crime Reports for Mountain View