I really like were you are going with the letters looking like a house. The only thing I worry about is the repetitiveness of the H and D since it is there twice. If you have a way to make it not so repetitive that would be great.
Thanks for your feedback. The reason behind the 2 houses was that it shows you deal with lots of housing/real estate. Here's another version with 1 house but having a capital D as the door.