Somewhat visible in some of the outdoor photos: a railroad right-of-way is located directly behind this house, with at least two trains per hour from early morning until midnight.
And for those that aren't familiar with Caltrain, that train blasts its horn two or three times before each stop and the horn is so loud that you can hear it from a mile away. Living as close to the train as that house is would be miserable.
I would be more worried about thick layer of diesel dust on all surfaces (including your lungs) but hey they are going electric in next 20 years for sure
I could easily afford a home in the bay area if I was more tolerant to noise. I live 1.5 miles away from the train and I can hear it quite clearly (the horns, as well as the track noise), but it's distant.