Longmont Deck Builder: Decks, Patio Covers & Additions
We are a residential deck builder in Longmont, designing and installing custom composite and wood decks, patio covers and additions for homeowners across Boulder and Weld counties.
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
Service areas: deck builder in Littleton · ADU builder in Denver
Service areas: deck building in Denver · deck building in Fort Collins
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 $250–$450 per sq ft. 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
Choosing a Deck Contractor in Longmont
When you compare deck builders in Longmont, ask who pulls the permit, how the ledger is flashed against the house, and whether the footings are dug below the frost line. Those three things decide whether a deck lasts.
Composite decking installer or wood?
We install Trex composite decking and wood decks. Composite costs more up front but does not need staining and holds up to Colorado sun and freeze-thaw. Wood is lower cost and easy to repair.
Deck repair or full deck replacement?
If the framing and footings are sound, deck repair or a resurface with new boards can make sense. If the joists or ledger are rotted, replacement is the safer call. We will tell you which one you need. Call 720-828-7997.
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.
Deck Installation, Replacement and Repair in Longmont
As a Longmont deck contractor, we handle every kind of deck job: new deck installation, full deck replacement when the framing is worn out, and rebuilds that keep a sound frame and replace the boards and railings. We install both composite and wood decking.
When to Replace a Deck Instead of Repairing It
Deck replacement in Longmont makes sense when joists or posts are soft, ledger flashing is missing, or the footings have moved. If the frame is solid, new decking and railings can give you a new deck for less. We check the frame first and tell you which one you need.
Among deck builders in Longmont, we are one of the few that also builds the patio cover, pergola or addition next to the deck under the same contract. Call 720-828-7997 or text 720-453-5095 for a free estimate.
Decks, patio covers and additions near you
Deck builder in Aurora · Deck builder in Boulder · Deck builder in Denver · Fort Collins · Home addition contractor in Denver · Patio covers in Denver
Sources & references
Josh Brooks Construction and Renovation Inc. backs the guidance on this page with authoritative Colorado and industry sources:- Boulder County — building permits & contractor requirements
- Jefferson County, Colorado — building safety & permits
- Colorado Department of Regulatory Agencies (DORA) — state licensing & consumer protection
- Better Business Bureau — verify contractor reputation
Want shade over the deck or patio? We also build custom patio covers and pergolas in Longmont and across Northern Colorado.
Related guide: Deck installation in Longmont: permits, code rules, materials and cost · Deck repair or deck replacement in Longmont? How to decide
Deck Contractor in Longmont, CO
As Longmont deck builders we design, permit and build composite and wood decks, replace failing decks and add stairs, railings and patio covers. Decks attached to the house or more than 30 inches above grade need a permit, and we handle it. We hold Boulder County contractor license CON-24-0152 (Class C).
- Trex and other composite decking
- Pressure-treated and cedar decks
- Deck replacement and structural repair
- Railings, stairs and lighting
- Patio covers and pergolas
Related: patio covers.
Call 720-828-7997 or text 720-453-5095 for a free on-site estimate and a written, itemized quote.
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