Call around and get 3-4 quotes. Choose the second lowest one but not the lowest.
Cool noise map.
Thanks @caiguycaiguy…more reason to reconsider the usual suspects around SFO like San Bruno, MillBrae and SSF…
Plant the evergreen bunch of trees along the fence, plant the Japanese cedars (Yoshinos) or Chinese bamboo to prevent the noise of the highway, it is fine, but very expensive and very difficult to maintain . There are less expensive solutions (see here highway noise barrier ) such as sound barriers or noise curtains.