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Call 800-613-1303 for free technical support.

Included with any CoStar subscription is free access to live, “platinum level” customer support from our Washington, DC-based U.S. Support Center. As a CoStar subscriber, you can count on:

  • Speed.  Calls to CoStar support are typically answered in less than 10 seconds. 
  • Expertise.  CoStar support professionals average four years of CoStar support experience.
  • Real People.  You talk immediately to a courteous, expert professional.  No automated replies or voice mail runaround.
  • Convenience.  CoStar support professionals are on duty weekdays 8:00 am – 8:00 pm ET; Saturdays 9:00 am – 6:00 pm ET.
  • Choice.  Prefer email? Send a email to and expect a reply within two hours.
  • No Limits.  Call anytime.  There’s no limit on how much or how often you use CoStar support services.

UK technical support.

If you are a CoStar UK client, please call 020 7009 2900 or email for free technical support. 

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Phone and email 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.

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CoStar subscribers receive free training.  Call 888-226-8384 to schedule a session now.