Colorado draws its emissions requirement by area rather than by state line, and the line runs through counties instead of around them. Boulder, Broomfield, Denver, Douglas and Jefferson are covered in full, while Adams, Arapahoe, Larimer and Weld are covered only in part. A new vehicle is exempt for its first 7 model years and needs its first inspection once it reaches the eighth.
| Service | Typical |
|---|---|
| Auto repair shop labor rateColorado average | $151 per hour |
Ranges last checked September 2026. They come down automatically when they are due to be rechecked.
Every figure above comes from a named source we can link to, with the date we last checked it. We publish ranges rather than single prices because a range is what a provider will actually give you: the same job moves with what is being worked on, the materials, how hard it is to get at and how busy the trade is locally. Treat these as the order of magnitude to expect before you call, not as a quote.
Where a source publishes figures state by state, this page shows the figure for this state rather than a national average. Where no state-level source exists, it shows the national range and the local factors that move a job within it. We do not scale a national number by a multiplier of our own invention.
Every range carries a review date. When that date passes the number comes down until it is rechecked, rather than sitting here undated.
Emissions testing in Colorado applies to the Front Range program area: Boulder, Broomfield, Denver, Douglas and Jefferson counties in full, plus portions of Adams, Arapahoe, Larimer and Weld. Those four partial counties are where people get caught, because a county name is not an answer on its own. An address in Denver is inside the requirement; one in Colorado Springs is outside it; addresses in Englewood or Erie sit in counties that are only partly covered, so the question has to be asked of the address rather than the county.
A vehicle needs its first emissions inspection once it reaches its eighth model year, which means the first seven pass without one. Buy a car three years old and the test is still four years away; buy one eight years old and it is due now. That is a real difference in running cost between two cars that look similar on a forecourt.
Vehicles of model year 1982 and newer are tested every other year. Model year 1981 and older are tested every year instead, which reverses the intuition that older cars are treated more leniently. Vehicles of model year 1975 and older can be registered in Colorado as collector’s items with no emissions inspection requirement at all.
Shop labor in Colorado sits well above the national figure, near the top of the national spread rather than in the middle of it. A statewide average flattens a lot here: a Denver bay and a rural Western Slope one are different businesses with different overheads. Treat the figure in the table above as the center of gravity, and remember it is an hourly rate, so the invoice is that rate multiplied by the hours the job is booked at.
For vehicle work, settle the emissions question by address before you book anything, especially in Adams, Arapahoe, Larimer or Weld, and check the model year against the eighth-year rule rather than guessing from how new the car feels. A shop has no reason to talk you out of a test you do not owe.
For building work, do not assume a single license covers the whole of Colorado. Some trades are licensed by a state board and others by the city or county, and the requirements differ between Denver, the surrounding municipalities and unincorporated county land. Ask which authority licenses the contractor for the work at your address, then confirm the number with that authority rather than with the contractor.
In the Front Range program area: Boulder, Broomfield, Denver, Douglas and Jefferson counties in full, plus portions of Adams, Arapahoe, Larimer and Weld. Outside that area there is no emissions requirement.
That has to be answered by the address rather than the county. Adams, Arapahoe, Larimer and Weld are only partly inside the program area, so two homes in the same county can face different requirements.
Its eighth model year. The first seven model years are exempt, and the first inspection falls due once the vehicle reaches the eighth.
Model year 1982 and newer are tested every other year. Model year 1981 and older are tested every year. Model year 1975 and older can be registered as collector’s items with no emissions inspection requirement.
Not for every trade. Some are licensed by a state board and others by the city or county, and the requirements differ across Denver, the surrounding municipalities and unincorporated county land. Ask which authority applies to your address and confirm the number there.