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Renew by Mail

To renew your vehicle registration by mail, please send the following to Motor Vehicle Division, 1750 33rd Street, Suite 100, Boulder, CO 80301:

  • Postcard renewal notice
  • Proof of insurance if it is noted on your postcard renewal notice. ALL motor vehicle types MUST have insurance to be driven on Colorado highways.
  • Your new physical and mailing addresses if they have changed.
  • Proof of emissions if it is noted on your postcard renewal notice. To apply for an Emissions Waiver or Out-of-State Emissions Extension, visit
  • Payment by check for the amount shown on your renewal postcard. Checks should be made payable to the Boulder County Clerk.
  • Renewals must be received by the last day of the grace period (one month after the expiration month).

Contact Us

Motor Vehicle Division

**New as of Jan 4, 2021**
7:30 a.m. – 5:00 p.m. Mon-Thurs.
CLOSED Fridays
Online Contact Form
Contáctenos - Formulario en línea

Phone: 303-413-7710

Fax: 303-413-7725 (Boulder office)
Fax: 303-413-7002 (Lafayette office)
Fax: 303-678-6126 (Longmont office)


Boulder: 1750 33rd Street
Map & Directions

Longmont: 529 Coffman Street
Map & Directions

Lafayette: 1376 Miners Drive
Map & Directions

Mailing Address

1750 33rd Street, Suite 100
Boulder, CO 80301