I already converted out one gas heat property to electric so the only gas bill we have across over 40 properties is for cooking stoves and domestic hot water for one seven unit building.

We recently installed a new package HVAC system for her in the property which wasn't cheap.I am wondering as her landlord and manager what I should do and also what I can do.Do I have to let her break her 1 year lease early because she is claiming a "domestic abuse" situation?

Unsure of DC prices but in Washington State you are looking at 2-3$ / SF, not including underground (you can typically tap off the domestic line for smaller projects).

Lots of domestic and international migration is happening and for every one company leaving the state 5 new ones are created.

The other thought is that different states have different laws in terms of when it is allowed for a tenant to terminate a lease with a domestic violence situation.

She was granted a "Relief from Domestic Abuse" order against a different person 7 years ago according to the court records.

Either by removing a breadwinner from employment or changing who can live in the property (in cases of domestic abuse). 

(A)In this section:(1)ADULT means a person 18 years of age or older.(2)DOMESTIC PARTNERSHIP means adults living in the same household and sharing common resources of life in a close, personal, and intimate relationship.(3)UNRELATED means not connected by consanguinity, marriage, domestic partnership or adoption.

If this was out of a domestic or gang related issue, just knowing it was not random will likely help a lot.

Banning them altogether is concerning, said Debra Carlton, senior vice president of public affairs for the California Apartment Association.Through a background check, a landlord might be able to weed out a prospective renter with prior domestic violence convictions, for example, and prevent him or her from moving into an apartment near a victim, Carlton said.