Simply replace the unfilled areas such as "[]" and "[date]" with your information.
Dear [name],
We are moving to a new location on [date]. Our company is looking forward to moving into this new [office/facility] that is located at:
[new street address]
[city/state]
[zip/postal code]
Our phone, email and fax numbers is as follows:
Phone: [number] Fax: [number] mail: [email]
We feel that our new location is much better suited for our customers needs, and will increase our service to you. Please stop by at any time to see our new [office/facility].
Sincerely,