I
n St. Helena, the median price per square foot for a home over the past four weeks was $1,006, making it the most expensive in Napa County at $406 more than the county's median.

    Yountville follows closely behind as the second-most expensive community, with a median price per square foot of $752. In contrast, American Canyon offers the best value, with a median price per square foot of just $344.

    A recent sale on Arrowhead Drive in St. Helena exemplifies the high prices: a 2,485-square-foot home sold for $2,500,000 over the past four weeks. The data is based on sales registered during the week of April 7 and compiled from municipal assessors in Sonoma County.