Robert, I am a local Realtor in Afton and Nellysford. I will be happy to help you.
My phone number is (434) 531-9732 or you can email me ShelbyRalston@gmail.com

Without knowing your reason for needing such information, it makes it tough for us to give you the most appropriate source. A local real estate agent is always a good source, if you have a relationship. Also, if you go to the web site below, I don't know if it will work for your area or not, but you can order a market snapshot. It does work for more than the 20175 zip code, but I've only tested in the Wash DC metro area (No Va, MD, panhandle of WV and DC). Try it.

Request a free Comparitive Market Analysis from a local real estate professional. They will be able to provide you with the information you are seeking.

Good luck

Contact an experienced area Real Estate Agent, he or she will be able to take all the details of your home,
sq.ft., no of rooms, condition of home, upgrades, basement amenities, garage, lot size etc. into consideration and compare to recent sales to give you an app. market value of your property.

Most important though is why are you interested in the value of your home?
Do you just want to know in today's market? Do you want to refinance possibly? Are you thinking about selling your property?

When selling..... remember the value of a home for sale is what a ready and willing and a financially sound
buyer is ready and willing to pay...... So no one value determination is 100 % correct, since they are based on comparable homes, and as you know no one house is exactly the same as another!
Hope this helps a little, if you need more detailed info, let me know and if you would like me to connect you with an experienced Realtor Colleague in your area, I gladly would do so!
Good Luck
Edith
edithsellshomes@gmail.com

Contact a local realtor who can provide you that information. Listing agents and appraisers use MLS past 6 months sales history determine value of home based on area, sq. ft, room count, condition of home.