If you have questions about property valuation and property tax, visit boco.org/2023Valuation.

Motorcycles, RVs, and Trailers

Appointments now required for in-person visits. Additionally, registration renewals need to be completed out of office. Options include online, by mail or drop box, or at a self-service kiosk. Read about these changes (including benefits, and FAQs). Información en español.

How to Register Motorcycles, RVs, and Trailers

Motorcycle with sunset in background

Motorcycle registration

Motor home with starry night sky

RVs and Motor Homes

Trailers in parking lot

Trailer Registration

  • Colorado law requires that all trailers be titled, registered, and plated.
  • Trailers from Colorado: Visit one of our offices and bring Secure & Verifiable ID, the Colorado title, and paperwork if purchased from a Colorado dealer.
  • Out-of-State or homemade/kit trailers: Visit our Trailer page for registration instructions.

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