The typical asking rate per listing is in the $20's per square foot per year. The Louisa County region is seeing a a boost in rates. In the last 3 months, the median rate increased $25 per sqft per year.
In the last 90 days, 0 listings have been posted online, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About NaN% of the listings in the Louisa County are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 260 sqft. Most buildings in this market were built in 1965 and are Class A.