Buying first home in Northern Virginia/DC/Maryland area

[Dev Paul]

I'm looking to buy a home in Northern Virginia or one of the better Maryland counties. Budget is max 425k, with a monthly mortgage payment, property taxes, insurance and HOA fees (if applicable) not exceeding 1800-2000 per month. Down payment 15-20%. Ideally looking for a new construction and in desirable/clean area for future rental potential. An extra room with separate entrance or a basement with bathroom will be really desirable. I believe SFH will be not possible in this budget, but perhaps a decent townhouse could work. I generally dont like condos for exorbitant HOA fees, but if there is a big condo with less than 250 hoa fees, i can consider that as well. Any suggestions on areas, towns, counties will be much appreciated. Any opinion or pointers on home construction companies such as Ryan homes, Miller and Smith etc?