Denver is a city and a county at once, so one set of rules covers every address inside it. Those rules are some of the most detailed in the metro when a job reaches the curb, and the climate is the same one that shapes every Front Range driveway: dry air, hard sun, big swings between day and night, and clay that moves. This page covers the conditions, then the paperwork.
Every neighbourhood inside the city limits, from the older streets near downtown out to the newer ones by the airport, plus the enclaves and edges where Denver meets Aurora, Lakewood, Englewood and the Adams County suburbs. If you are unsure whether your address is in Denver or a neighbouring city, the property tax bill says which, and it decides whose rules apply.
The National Weather Service office in Boulder puts Denver's average first autumn freeze around 7 October and the average last spring freeze around 5 May, with about 57 inches of snow in an average season. Precipitation for the whole year is only around fourteen inches at the airport station. The Colorado Climate Center describes the state's air as generally very dry, the thin atmosphere as letting more solar radiation through, and day to night temperature changes as large, with chinook winds warming the areas near the mountains in winter.
Put those together and you get the Denver pattern. Snow falls, the sun comes out, the drive is running with melt by the afternoon and frozen again by morning. In summer the same sun and dry air bake the surface, which is why asphalt here greys early. For sealing, the freeze dates matter most: a coat needs warm days and nights that stay mild while it cures, so jobs are booked well inside those dates rather than at their edges.
The Colorado Geological Survey describes bentonite and similar clays underlying many populated parts of the state, able to expand by up to 20 percent of their volume when wet, and lists cracked driveways and heaved roads among the results. Denver is no exception. On a city lot, the sources of that water are usually close at hand: the lawn sprinkler throwing water on the edge of the drive, a downspout emptying beside it, or a low spot by the garage where melt collects every sunny afternoon.
That matters when deciding what a drive needs. A crack that runs along the lawn edge, or one side of the drive standing higher than the other, is often the soil moving rather than the asphalt wearing out. Sealing still helps, because it closes the surface, but the quote will say where the water is coming from, since moving a sprinkler head is cheaper than any patch.
In Denver's own construction rules, the driveway apron runs from the curb cut back to the property line, and it is public right-of-way along with the curb, gutter and sidewalk. The rules say permits for building or repairing any of those must be obtained before work starts and are issued only to properly licensed and bonded contractors. The city also wants each apron stamped with the contractor's name and year, and holds the contractor to a guarantee on the work.
So sealing and crack filling on your own drive need no city permit. Any apron, curb cut or sidewalk work is done only by a contractor already holding the Denver license and bond for it, and the quote says so.
No. Work on your own drive at grade is exempt from building permits. The apron at the street is the part the city controls.
Yes, by a contractor holding Denver's right-of-way license and bond, under a city permit. It is quoted as its own line.
The average first freeze is early October, so autumn work is best booked for September, and a warm spell after that is a bonus rather than a plan.
For sealing, no. For a new or changed opening onto a state highway, CDOT is involved as well as the city.
Around Denver: Jefferson County to the west, Adams County to the north and Arapahoe County to the south and east.
