Hiring an excavation contractor in Colorado
Gradeline lists 1,138 excavating and site work contractors in Colorado across 57 counties. This guide covers the Colorado rules that affect a dig: frost depth and 811 notice through Colorado 811.
What to know before you hire in Colorado
4.6★
Know what a good rating looks like here
Colorado contractors average 4.6 stars on Google. Shortlist crews at 4.5 or better with a solid review count (209 qualify), and treat anything under 4.0 as a red flag.
36 in
Footings go below the frost line
Frost reaches about 36 inches in Colorado. Any bid for footings, foundations, or buried lines should dig at least that deep. If the depth is not written in the quote, ask.
2 days
Utilities get marked before digging
Colorado law requires 2 business days notice to Colorado 811 before any digging. Ask whether your contractor files the request, and plan the start date around the wait.
38%
Most listed contractors have no website
Only 38% of listed Colorado contractors run their own site. Judge them on reviews, photos, and years in business rather than web polish, and get at least three written quotes.
Get quotes from Colorado contractors in one request.
Get free quotesArea-specific FAQ
How far in advance do I need to call before digging in Colorado?
At least 2 working days. Colorado 811 takes locate requests statewide and has underground utilities marked before any excavation. Hitting an unmarked gas or power line can injure the crew and lead to costly repairs.
How deep do footings need to be in Colorado?
In Colorado, footings typically need to extend below the frost line, which is around 36 inches here. A local contractor will confirm the code requirement for your site.
When is the best time of year to dig in Colorado?
Spring through fall is the main excavation season in Colorado. A frost line around 36 inches makes winter digging slower, and the spring thaw leaves sites soft.
