Deck Builders · Longmont, Colorado
Deck Builders in Longmont, CO — Composite, Hardwood & Outdoor Living
Design–build composite and hardwood decks, patio covers and pergolas for Longmont homes, engineered for Front Range snow load, hail and wind. Our kids go to school and play sports in Longmont and we volunteer in this community. Serving Longmont since 2001 from just up the road — a short drive, not an hour-plus haul from the metro.
Northern Lights Exteriors is a design–build deck builder serving Longmont since 2001. We build with Trex, TimberTech and Deckorators composite as well as hardwood, and engineer for Front Range snow load, hail and wind — including steel or aluminum framing where a non-combustible substructure makes sense. We also build patio covers, pergolas and covered porches, and pull Longmont permits and HOA approvals. Backed by a 5-year installation warranty.
Trex, TimberTech, Deckorators
Patio covers, pergolas, porches
Snow load, hail, wind
Pulled for you
5-year installation
4.9★ · 552 reviews
Licensed · Insured · Code-Compliant · Manufacturer Distinctions with TimberTech, Trex, & Deckorators
Working on more than Decks?
See Longmont Exterior Remodeling Projects →
Visit our Longmont Exterior Remodeling hub for windows, roofing, decks, commercial services and more.
Serving Longmont, CO as a local service-area provider, Northern Lights Exteriors delivers deck design-build backed by structural engineering, permit coordination, inspections scheduling, and smart detailing for Front Range and WUI considerations. From concept to final inspection, we handle the process so you enjoy your new outdoor space safely and sooner.
Get Your Free Deck Consultation →
See Longmont Exterior Remodeling Projects →
Your Price, Decided With You — Not a Surprise Quoted Price Later
The worst part of most deck projects is the gap. You spend an hour describing what you want, someone measures, everyone leaves — and days later a number lands that you either swallow or argue with. If it comes in high, you start over. We took the gap out.
① Watch the price move while you decide
On the first visit we walk your foundation, structure, decking and finish options together on software we built ourselves. Change the framing, change the boards, change the railing — the price updates in front of you, in real time. You are not waiting days to find out what your decisions cost.
② Build to your number, in the same sitting
Tell us what you want to spend and we work toward it while we are standing on the site with you, instead of mailing a proposal that misses by twenty percent and starting again. Every option is priced as you consider it, so the budget conversation happens with you rather than to you.
③ Find out what you can actually live without
When every change is priced the moment you make it, the trade-offs get obvious fast. Most people end up cutting one thing they were sure they wanted, and protecting one thing they had not realized mattered to them. That only happens when you can see it.
④ This is our own technology
Not a catalog and not an off-the-shelf calculator. We built it because deck pricing genuinely is complicated — footings, framing, spans, rail systems and finishes all move the number differently — and we would rather show you why than ask you to trust a lump sum. You leave the first appointment with the scope of work in hand.
⑤ And no, this is not a high-pressure close
Worth saying plainly, because real-time pricing on a first appointment is exactly what high-pressure home-improvement sales looks like — so the suspicion is fair. We are not doing that. Nobody is going to sit in your kitchen for ninety minutes waiting for a signature, and there is no discount that expires when we walk out the door. This is education: what the options are, what each one costs, and which ones are genuinely worth it on your build. You end up with a project moving at a price you understood from the start — and you decide on your own time.
Why Longmont Homeowners Choose Us for Decks
- Permit & Inspection Pros: We prepare submittals, coordinate reviews, and schedule inspections to meet Longmont code.
- WUI-Aware Design: Materials and details chosen for ember resistance, clearances, and defensible-space best practices.
- Engineered Structures: In-house and partner engineers specify footings, beams, joists, connections, and lateral bracing.
- Colorado-Tough Materials: Composite & steel options that resist UV, hail, snow/ice, and freeze–thaw cycles.
Ask about permitting and WUI requirements for your address →
Popular Deck Systems & Features in Longmont
- Composite decking (TimberTech®, Trex®, Deckorators®) with hidden fasteners
- Steel or pressure-treated framing; helical pile or concrete pier footings
- Modern aluminum, cable, or tempered-glass railings
- Built-in stairs, benches, planters, privacy screens
- Pergolas, shade structures, and integrated lighting
- Fire-smart detailing for WUI zones (ember-resistant, underdeck protection)
See Recent Deck Projects
Deck Build Cost in Longmont
Deck pricing varies by size, height, framing type (wood vs. steel), footing type, railing system, stairs, and custom features. We provide clear budgeting during design so your plan aligns with your investment.
Why Northern Lights Exteriors for Decks in Longmont
- Service-Area Specialists: Familiar with Longmont permitting workflows and inspection checkpoints.
- WUI-Informed Solutions: Material selections and details aligned with wildland-urban interface best practices.
- Design → Engineering → Build: One team to plan aesthetics, calculate structure, and deliver craftsmanship.
- Pro Project Management: Transparent timelines, clean sites, and responsive communication from start to finish.
Meet our team
See all Longmont exterior services we provide beyond decks.
How to Read an Exterior Warranty (Before You Sign One)
Warranties are one of the easiest places in this industry to be impressed by the wrong thing.
It helps to know that almost every exterior project carries two separate warranties,
and they are backed by completely different people.
| Type | Covers | Backed by |
|---|---|---|
| Manufacturer warranty | The product itself — the siding, shingles or window units | The manufacturer. Commonly 20–50 years, and genuinely durable because the company is large and long-established. |
| Installation warranty | How it was installed — flashing, fastening, weather barrier, sealing | The contractor, and only the contractor. It is worth exactly what that company’s continued existence is worth. |
That second row is where most real problems live. The overwhelming majority of exterior failures
are not defective product — they are water finding a path through a detail that was installed
wrong. So the installation warranty is the one that actually protects you.
Why “lifetime installation warranty” deserves a follow-up question
A lifetime installation warranty is a promise about the contractor’s
lifetime, not yours. If a company has been in business eight or twelve years, a lifetime promise is
a forecast about a track record that does not exist yet. It is not necessarily dishonest — but
it is unverifiable, and it costs nothing to print.
Worth asking any contractor, including us:
- How many years have you been in business under this name and this ownership?
- Is the installation warranty written into the contract, or described verbally?
- What specifically is excluded, and what voids it?
- Who performs the warranty repair — your own crew, or a subcontractor?
- Is it transferable if I sell the house?
Where we stand: Northern Lights Exteriors has been in business since 2001 —
about 25 years. We offer a 5-year installation warranty on our workmanship, alongside
the manufacturer warranties on the products themselves, which typically run 20 to 50 years. We would
rather put a number on it that we have the history to stand behind than print a word that sounds
bigger and means less.
aria-labelledby=”faq”>
Longmont Deck Builder FAQs
Why are you the best Longmont deck builder near me?
Building a deck takes a lot of planning. From design, architectural and structural plans, picking materials, and navigating the municipality code requirements—the process can take some time. We are experienced and will help you plan this project from concept to completion.
Can you handle permitting and inspections for decks in Longmont?
Yes. We prepare drawings and documentation, submit for permits, coordinate plan review comments, and schedule all inspections.
Do you design for WUI requirements?
Absolutely. We specify ember-resistant materials and details, address clearances, and design under-deck areas to reduce ignition risk.
Do you offer engineering for complex sites or second-story decks?
Yes. We provide engineered calculations and details for footings, beams, joists, connections, and lateral bracing—especially important on hillside lots.
What decking and railing options are popular in Longmont?
Low-maintenance composites (TimberTech®, Trex®, Deckorators), steel or PT framing, aluminum or cable railing, integrated lighting, and pergolas are top choices.
Are there any natural fire resistant products?
We do offer Moso Bamboo Outdoor decking as a natural option
Start Your Longmont Deck Project
From concept sketches to final inspection, our design-build team streamlines permitting, engineering, and construction so you can enjoy your outdoor space with confidence.
