Two Morrisons, one zip code
The Town of Morrison is a few blocks of 1870s buildings at the mouth of Bear Creek Canyon. Nearly everything else that carries a Morrison address — the custom homes around Red Rocks Country Club in Willow Springs, Willowbrook, and Lyons Ridge; the starter homes of Friendly Hills and Harriman Park; the cabins up in Hilldale Pines — is unincorporated Jefferson County, climbing into foothills that reach about 7,500 feet.
That split matters: it decides who permits your deck, what code applies, and increasingly what your deck surface is allowed to be made of.
Permits: town counter or county counter
Inside town limits, the Town of Morrison Building Department is your counter, and decks are explicitly permit-required. Everywhere else, it is Jeffco Building Safety. We confirm jurisdiction from your parcel before drawing a line, then prepare the packet, file it, and manage inspections. Our permit guide covers the wider process.
On the county side, every new deck, expansion, replacement, and repair needs a building permit under Jeffco's 2018 IRC. Footings go to the county's 36-inch frost depth, deck live load starts at 40 psf and rises with roof snow load, and joist cantilevers over two feet need a Colorado registered design professional's seal. The town's posted deck handout is simpler — two plot plans, 36-inch guards that stop a 4-inch sphere, piers 36 inches deep — but the permit is still required.
The wildfire code, plainly
Jefferson County's Wildfire Resiliency Code took effect July 1, 2026. In mapped WUI zones of unincorporated Jeffco it covers new decks and deck replacements: the deck surface has to be noncombustible, an approved composite with a flame-spread index of 75 or less, or another ignition-resistant material, and the framing underneath has its own list — heavier-dimension lumber, fire-retardant-treated wood, or noncombustible framing. Whether it applies to you is parcel-specific — but Morrison's foothill neighborhoods are the terrain the mapping targets. The county's interactive WUI map shows whether an address falls in a Class 1 or Class 2 area, and we check it before quoting materials. On mapped lots, capped composite is now the code-aligned way to build, not just our preference.
Hogback terrain earns its engineering
Red-rock and hogback ground makes for spectacular decks and honest structural work: sloped lots want taller posts, engineered footings, and stair runs that work with the grade. West-facing foothill exposure also means real sun and real weather — which is where a covered section or pergola engineered for wind and snow load earns its keep. The covered deck cost guide has numbers on what that adds.
Snow load climbs with the hill
Jefferson County sets design snow load by elevation. Below 6,500 feet the ground snow load is 43 psf; at 7,000 feet it is 54; at 7,500 feet, 67. Past 70 psf a licensed design professional has to stamp the plans. A deck in town and a deck a thousand feet higher are not the same structure. Our snow load guide explains what those numbers mean for beams and joists.
Composite first, for Morrison reasons
Altitude UV fades wood finishes fast, freeze-thaw works fasteners loose, and hail is a summer certainty. Composite handles all three with near-zero upkeep, and railing systems match its lifespan. If you're weighing alternatives, our composite vs. hardwood comparison lays out both sides.
Repair when true, replacement when honest
Morrison's decks are as varied as its housing — some are ten years old, some are original to 1970s homes. We inspect the frame first: sound structure gets a repair, aged-out structure gets a plain answer and a replacement plan.
Jeffco treats a repair like a build — it needs a permit too — so we file for it the same way we do up the hill in Evergreen. The deck repair cost guide shows what ledger, post, and stair work runs.
Thirty minutes from the shop
From Centennial, Morrison is about thirty minutes up C-470 — the same corridor as our Lakewood and Golden work. Distance shapes our scheduling, not your price or the guarantee.
Run the cost calculator for a planning range, then tell us what you are planning.