Does Loudoun County, VA allow for a single family house to have 2 units with separate entrances to be rented?

Everywhere else this would be called a triplexDuplex down means the entrance is on the first floor and additional living space is on the floor below. 

Skip tracing is how I made my entrance into Real Estate Investing. 

It has a separate bathroom, shower, the plumbing and electric are up and running, It has a separate entrance too.I don't have permits to use it as a bedroom. 

Says he can do it Monday (4 days after he sent a camera snake down it) great how ever it has now been 20 plus days and he might show up early next week.Not to mention the fact he took a power snake down the sewer line twice and still manage to miss the root clump 12 feet from the entrance that blocked half the pipe. 

The property is a SFH- 1900 sqft, 3/2 with private entrance to basement. 

The unit I am living in is a 1 BR/1 BA on the second floor of the building...the door to the attic is right outside my entrance and goes up to a big open area that USED to be 2 additional bedrooms, however, it has been vacant for years as there was a fire in the 80's.My handyman took a look and agreed that he could definitely add the 2 bedrooms, no problems...I know egress windows will be a major factor and I am also looking into the heating and electric to make sure it is linked to my unit's heater/panel.What else should I be looking/planning for?

Every "entrance" into one deal must consider the "exit" from that deal which in turn must be based on the "entrance" of the next deal...and so on. 

The entrance without notice should not have happened....that is agreed. 

I found a good property with a mother-in-law in the basement with a separate entrance.