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

Emissions Extension Request

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.

Emissions Extension Request

If an emissions test is required for a vehicle that is temporarily out of state, you may apply online for an Emissions Extension. You may also apply by mail or in-person at one of our DMV branch locations. To apply, provide the following:

  • Complete the emissions extension form (DR 2376) in its entirety
  • Results of passing emissions test, if testing is performed in the county where the vehicle is located.*
  • Copy of current insurance
  • Renewal reminder postcard, if available
  • Registration payment by check or money order made out to Boulder County

* If emissions testing is not performed in the county where the vehicle is located, a VIN verification form (DR 2698) or an equivalent out-of-state form must be completed by either a local law enforcement officer or a motor vehicle employee from the state where the vehicle is currently located. Additionally, the vehicle must be emissions tested within 15 days of returning to Colorado.

You can return this form to our office via mail, paperwork drop-off box, or you can email the form to motorvehicle@bouldercounty.org. Once your application has been approved, you can renew online, at a kiosk or over the phone by calling 303-413-7710.

Mail Address:
Boulder County Motor Vehicle Division
Attn: Emissions Extension Requests
1750 33rd Street, Suite 100
Boulder, CO 80301

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