put-upon said:
I made arrangements with a contractor to perform work in my condo. A board member called the contractor crying and said she didn't want him to do the work. He's upset. I'm upset. What business it is of hers, I don't know. (She has a history of peculiar behavior.) Do I have any recourse for her interference under DC law, any law?
My response:
While there are laws against "contractual interference", there doesn't appear to be any damages suffered by you as a result - at this time, from a fair reading of your post.
Hire a new contractor, and tell that contractor to ignore your neighbor when she approaches. If he doesn't, fire him.
If this becomes a serious matter, e.g., repeated interferences by her, then you may have to go to court to file for a Temporary Restraining Order.
Keep detailed notes and records concerning her actions, so that if you have to go to court, you'll have contemporaneous notes to offer into evidence for the judge to review in order to make a ruling on your TRO.
IAAL