Decks, Patio Covers & Home Additions Longmont CO
Direct Answer
How much does a deck cost in Longmont, CO?
A custom composite deck in Longmont, CO typically costs $15,000–$35,000 installed in 2026, depending on size, material, and complexity. Deck additions return 89–95% at resale nationally. All deck builds require a permit in Longmont — Josh Brooks Construction and Renovation Inc. handles permits, structural footings, and full installation since 2014.
Searching for deck builders in Longmont, CO? We’ve been handling custom deck construction across Colorado since 2014 — composite, cedar, and pressure-treated builds with full permits and engineered footings designed for Colorado’s freeze-thaw cycles and snow loads.
BY THE NUMBERS
Deck Additions: One of the Best Outdoor ROI Projects
“In Colorado, a well-built deck isn’t a luxury — it’s an extension of how people actually live. Since 2014 I’ve built decks across Northern Colorado and the Front Range, and the projects that hold up best are the ones built to code, with the right footings for our frost depth, and materials rated for UV exposure. Cheap decks cost more in the long run. A proper build is an investment.”
— Josh Brooks, Licensed General Contractor — License CON-24-0152 — Longmont, CO
Decks, Patio Covers, Home Additions
& New Construction
Custom decks and pergolas. Home additions and second stories. ADU construction. Full custom home builds from foundation to finish. Josh Brooks Construction and Renovation Inc. handles it all with full permits and one point of contact throughout.
Full Deck Rebuild — Left Hand Canyon, CO
Complete tear-down and rebuild with Fiberon composite decking and black steel railings. Stunning mountain views.
Elevated Deck — Unincorporated Arapahoe County, CO
New elevated composite deck with dark steel railings on a two-story home. Full framing, decking, and railing system by Josh Brooks Construction and Renovation Inc..
Custom Timber Frame Patio Cover — Hygiene, CO
Before and after: old entry replaced with a custom timber frame patio cover featuring steel connector hardware, composite decking, and hog wire railings. One of the most striking projects we’ve built.
Northglenn • Johnstown • Longmont
Composite decking projects across the Front Range — elevated decks, ground-level platforms, black steel and white vinyl railings.
Deck Extension — Parker, CO
Second-story deck extension with cedar railing and white vinyl stair system.
Build More. Add More. Live Better.
🌁 Custom Decks & Pergolas
Fiberon, Trex Transcend, TimberTech Azek, and pressure-treated lumber. Multi-level, wraparound, and elevated designs. Steel and aluminum railing systems. Fully engineered and permitted.
Typical: $12,000–$60,000
🍉 Patio Covers & Timber Frames
Custom timber frame patio covers, attached and freestanding pergolas, screened enclosures, and outdoor living structures. Steel hardware and composite decking options.
Typical: $8,000–$35,000
🏠 Home Additions
Master suite additions, family room expansions, sunrooms, mudrooms, and full second-story builds. All trades in-house.
Typical: $60,000–$200,000+
🍻 ADU Construction
Accessory Dwelling Units for rental income, multi-generational living, or home office space.
Typical: $90,000–$180,000
🔨 New Home Construction
Complete custom home builds from foundation to finish. One builder, one contract, zero guesswork.
Custom quote — call for details
Request a Free Deck or Addition Estimate
Decks from $12,000. Additions from $60,000. ADUs from $90,000. Free estimates throughout Northern Colorado. Veteran & Senior discounts available.
Longmont CO 80501 • Boulder County License CON-24-0152 • $1M/$2M Insured • 30 Years Experience
Data You Can Trust
Decks & Additions: High ROI, High Livability
Outdoor living spaces consistently deliver some of the strongest returns in Colorado’s residential real estate market.
89–95%
ROI on a professionally built wood or composite deck
Source: 2025 Cost vs. Value Report
15%
increase in deck and porch permits in suburban Colorado counties since 2022
Source: Local Building Permit Data
$9.5K
average cost of a new deck nationally — one of the highest-ROI outdoor projects
Source: Remodeling Magazine 2025
35%
surge in demand for metal roofing on additions — driven by durability and energy savings
Source: Metal Roofing Alliance 2024–2025
“Decks are one of my favorite projects because the ROI is immediate — you use it the day it’s done and you get it back when you sell. We’ve been building decks and additions across Northern Colorado since 2014. Composite decking, structural pergolas, full home additions — we handle the permits and engineering on all of it.”
Josh Brooks
Licensed General Contractor — License CON-24-0152 | Deck & Addition Specialist Since 2014
Frequently Asked Questions
Common Questions from Colorado Homeowners
How much does a deck cost in Longmont, CO in 2026?
A composite deck in Longmont, CO typically costs $15,000-$35,000 installed in 2026 depending on size, material, and complexity. Pressure-treated wood decks run $10,000-$20,000. ROI runs 89-95% at resale nationally. Josh Brooks Construction and Renovation Inc. provides fixed-price bids with no surprises.
Do I need a permit to build a deck in Longmont, CO?
Yes — any deck attached to the house or over 30 inches above grade requires a building permit in Longmont. The permit requires a site plan, framing plan, and footing specifications. Josh Brooks Construction and Renovation Inc. handles the full permit package on every deck build.
What is the best decking material for Colorado’s climate?
Composite decking (Trex or Fiberon) is the best choice for Colorado’s high UV, temperature swings, and moisture cycles. Composite doesn’t splinter, warp, or need annual sealing like pressure-treated wood. Cedar is a good middle ground for homeowners who prefer natural wood. We walk every customer through the material tradeoffs before specifying the job.
How deep do deck footings need to be in Longmont, CO?
Longmont requires deck footings to extend below the frost line, which is 36 inches in Boulder County. Footings that don’t reach below frost depth will heave in winter, damaging the deck structure over time. Every deck Josh Brooks Construction and Renovation Inc. builds uses properly engineered footings to code.
What is the best deck for Colorado weather?
A composite deck with aluminum or composite railing and stainless steel fasteners performs best in Colorado’s UV exposure and freeze-thaw cycles. We recommend Trex or Fiberon composite boards for longevity and Fortress aluminum rail for zero-maintenance performance. Structural members use pressure-treated lumber rated for ground contact.
Can I add a covered pergola or patio cover to my Longmont deck?
Yes — attached pergolas and patio covers require a permit in Longmont if they are structurally attached to the home. Freestanding structures over a certain size may also require permits. Josh Brooks Construction and Renovation Inc. handles all permit requirements for deck-mounted and freestanding pergola and cover installations.
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