I am looking for a new house in Northern Virginia side. I looking for only brand new house as a first owner. Please give me some tips how to find. Should I go with realtor or try to find the builders in this area. Please give me some advice.

Regards

If closer to DC (anything within Vienna), a new house could cost around $1.4M.

You can do searches on redfin or any realtor's sites - helps if they have search by year option. You can contact a realtor as well. Good builders: Toll, Evergreen, KHov etc.

Without knowing the price range it’s hard to suggest, but newer homes not counting townhouses you have to go to Gainsville, Haymarket, Ashburn or Leesburg to have a decent looking single family house for <600k. If you want to build your own these areas now are mostly building townhouses but you may still find some new single house construction.

Nepalibhai,
Why are you just looking at Norther VA, You will good affordable price in Norther VA only if you go to Aldie, Past sterling, or Manassas, or south towards woodbridge. or burke for far. which is very hard to commute to DC or towards any part in MD.

Why don't you check in MD side. The house are very afordable and cheap in MD for brand new construction. I know lots of my frens bought new construction around DC in MD side. At MD Potomac area is expensive. else they are in good price.

The cheaper price of MD houses is negated by Montgomery County income taxes (3.20% on top of State and Federal taxes).
Choose a smaller house closer to work (or inside the capital beltway) than a mansion deep inside the burbs.
I cannot stress this enough that location is key. During rush hours in NOVA, 5-miles farther could mean an additional 30 mins of commute time. Weekends aren't any better either.

Nova is highly overrated  , people are buying homes in Aldo , Haymarket ( that’s way too far and doesn’t even look like the real Northern Virginia) . If you have to commute to closer to DC or Tyson’s Corner area , in rush hour , you’re looking at 2+ hours commute . Is it worth it ?

On Maryland side , Montgomery county rapes with huge taxes , even huge phone bill skyrockets in that county , their telecommunication tax is high !

I second C864.. and frustu

People buy mansions in far away locations and then sit there with empty homes commuting hours in traffic. Remember your guests only come once or twice a month but you commute every day. Buy something small closer to your work location.