Small county, high ground
Gilpin County is Colorado's second-smallest — about 150 square miles running from 6,960 feet to 13,294 feet — and nearly all of it is forest. Most of the roughly 5,900 residents live in unincorporated mountain subdivisions of 1970s–2000s homes on one-to-five-acre lots along Highway 119, in Golden Gate Canyon, and on the Gilpin side of Coal Creek Canyon. The rest live in the two historic gambling towns, Black Hawk and Central City, the latter also the county seat. Boulder County is the neighbor to the north, with Nederland just up the Peak to Peak.
Where we build in Gilpin County
Black Hawk is a casino town of about 130 residents with relocated Victorians on Chase Gulch and Dory Hill, a 48-inch frost depth, and a wildfire code effective July 1, 2026. Central City stacks 1870s Victorians on steep hillside lots in a National Historic Landmark District, so exterior work goes through the Historic Preservation Commission first. Rollinsville is an unincorporated railroad hamlet on the Peak to Peak with cabins in the townsite and mountain homes along South Boulder Creek.
Permits: one county, three counters
Gilpin County Community Development's Building Division issues permits for all unincorporated addresses — Rollinsville, Golden Gate Canyon, Coal Creek Canyon, and the Highway 119 subdivisions — through the OpenGov portal. Attached decks need a permit, and so does any change to posts, beams, joists, guards, or stairs. Inspections run Mondays and Wednesdays, and the county has issued its own electrical permits since March 2023. Black Hawk and Central City each run their own permits through SAFEbuilt and CommunityCore, and Central City adds the Certificate of Appropriateness step.
Snow load by GIS layer, engineered every time
The county does not publish a single snow-load figure. It publishes a Snow Loads of Gilpin County GIS layer, updated November 2024, and requires an ASCE Hazard Tool report at Risk Category II plus site-specific snow and wind design with every structural permit. In the county's own words, prescriptive design generally cannot fulfill the requirements and an engineered design is almost always required. We pull the value for your parcel, have beams, posts, and footings engineered to it, and design a covered deck or patio cover as the roof it is.
Wildfire code across the county
Gilpin County has adopted the 2024 International Wildland-Urban Interface Code with local amendments and the 2025 Colorado Wildfire Resiliency Code. Sprinklers are required for dwellings over 3,600 square feet and for all dwellings in Extreme Building Exposure Areas on the county's map. For a deck, that means capped composite or mineral-based boards rather than untreated softwood, framing bays closed or screened against embers, and nothing stored underneath.
Acreage decks, honest structure
On one-to-five-acre forested lots, an elevated walkout is often the best flat space on the property. Where an existing frame is sound we say so and price a re-deck in ignition-resistant composite; where it is not, a replacement on engineered framing built once beats repairing twice. Slim aluminum or cable railing keeps the trees in view.
Sixty-five to eighty minutes, scheduled in blocks
From our Centennial shop, Black Hawk is about sixty-five minutes up I-70 and US-6 through Golden, Central City seventy, and Rollinsville eighty via the Peak to Peak. We schedule mountain builds in consecutive-day blocks, which keeps the price and guarantee the same as in the metro. Run the cost calculator for a planning range, then tell us what you are planning and we will bring the snow-load value and the right permit counter for your parcel.