Harrington Place, aka 430 D Street is home to a variety of businesses.
- Law Offices of Michael J. Harrington
- Guichard, Teng & Portello A.P.C.
- Parlin Wildhorse, LP
- Better Solutions Mediation & Law Services Gillian A. Brady
- Gabrielli Law Office
- Julie A. Schwartz
- Richard T. Alcauskas Attorney at Law
- Harrington Place Properties