Do you think that there are a lot of people out there, adding a 12 x 12 room; so that we could obtain an AVERAGE?
And is this a slab or raised ground-floor addition?
Is it a second story addition?
Is construction in Napa a wee bit higher than Stockton?
I am sure that it has so many variables that your answers will be: Please contact a contractor for estimates.
Do you think?