Virginia's default no-fault waiting period is one year of living separate and apart. But there's a shorter path.
If you have no minor children together and you've signed a separation agreement resolving property and support, the waiting period drops to six months.
'Separate and apart' does not always require separate addresses, but it does require living genuinely separate lives, and you'll need a corroborating witness.
The separation agreement is where the real work happens. A carefully drafted one prevents years of argument; a sloppy one creates it.