Can you convert two adjacent RF1 Properties into a multi unit property?

[JC Coskun]

Hi all,

This is a zoning question that I'm hoping maybe one person in this entire forum knows the answer or could at least point me in the right direction. I have purchased a townhouse in an RF1 zoned area and neighbor wants to sell me his property and he contacted me. 

1- What would be the advantage of buying the adjacent next door property? 

2- Can I build a condo building potentially? 

3- Feel free to tag someone who is well versed in DC zoning here whether this person is an agent or a lawyer. 

Some info: 

- Combined lots would form about 5000 sq feet. 

- Currently zoning allows for 2 units

Thank you all in advance!