Customer Support
CoStar Group Customer Support
Welcome to CoStar Group Customer Support. Please choose from one of the following sections, so we can better assist you:
Contact Customer Support
Tel.: 800-613-1303
E-mail: support@costar.com

Phone and e-mail support is available Monday through Friday from 8:00 AM to 8:00 PM ET and Saturday from 9:00 AM to 6:00 PM ET.

Complimentary customer support for CoStar ARES support will be discontinued as of Dec. 1, 2005. After this date ongoing support options include:

Click to submit an online support requestClick here to submit an online support request