How Much Does a Custom Deck on a Steep Lot Cost in Morrison, CO?

Deck pricing on a steep Morrison lot works the same way it does anywhere — by the square foot — but the rate is higher, and for real reasons. Taller posts, engineered footings, harder access, and framing designed to carry the load off the terrain all cost more than dropping a deck onto a flat backyard. Below is an actual Morrison build, priced line by line, so you can see where the money goes.

Why Steep-Lot Decks Cost More per Square Foot

Composite decking starts at $45 per square foot installed on a standard build. On a steep lot that figure climbs, because the structure underneath it changes completely. Support posts run tall instead of short. Footings get sized individually for the grade and for whatever is actually underground at each location — soil in one hole, granite in the next. Material has to be carried rather than wheeled. None of that shows in the finished photo, but all of it is in the price.

The build below came in at $60 per square foot for the deck itself. That is the steep-slope rate for Trex composite with hidden fasteners — no visible screws anywhere on the surface.

A Real Morrison Deck, Priced Out

A 50' × 12' Trex composite deck built into steep terrain, with metal railing on 6x6 cedar posts.

The railing figure is worth a second look, because it is easy to check against your own layout. This deck attaches to the house along one 50-foot side, which leaves three open sides to rail: 50 + 12 + 12 = 74 linear feet. A freestanding deck of the same size would need railing on all four sides — 124 linear feet, or roughly $4,500 more. Attachment changes the railing bill more than most people expect.

A note on pricing: the figures on this page reflect our rates as of July 2026. Material costs move with inflation and supply, and lumber and composite pricing in particular can shift a fair amount year to year — so current numbers may be higher or lower than what you see here. Use this as a planning baseline, and treat your written estimate after a free on-site visit as the real figure.

What Moves the Number on Your Lot

Steep-slope pricing is not one flat premium. How far the deck sits above grade, whether there is soil or rock under each footing, how much of the material has to be hand-carried, and whether the design needs a geotechnical review all pull the rate around. Two Morrison decks of identical size can quote differently for reasons that are entirely below the decking.

Material choice matters too. Cedar and composite both start at $45/sq ft on standard builds, pressure-treated pine at $40, and exotic hardwood such as Garapa or Ipe at $60. Railing runs from $90 per linear foot depending on style. Full rates are on our pricing page, and the structural side of these builds is covered in our steep lot construction guide.

Ways to Bring the Cost Down

Building a deck and pergola together as one project takes 10% off the total — one mobilization, one crew, one set of footings. Pressure-treated pine instead of composite lowers the per-foot rate, and simpler railing styles bring the linear-foot cost down. Because we are a small, family-run company in Littleton with low overhead, we will also attempt to match any legitimate quote from a licensed, insured local competitor on an equal product.

Getting an Exact Number for Your Property

Square-foot pricing gives you a planning number. The written estimate after a free on-site visit gives you the real one — and on steep terrain that visit matters more than usual, because the cost drivers are things you cannot see in a photo or a satellite view.

Deck Giant builds custom decks on steep and rocky lots throughout Morrison, Evergreen, Golden, Conifer, Genesee, Kittredge, Idledale, Indian Hills, and Lookout Mountain, along with the wider Denver metro. Free on-site consultations and free preliminary quotes by email or phone, on every project.