How much does deck building cost in Longmont, CO?

Most Longmont homeowners spend between $4,600 – $12,600 on deck building, with an average around $8,400. Local labor prices 5% above the national average, so Longmont quotes tend to land at the higher end of national ranges.

Why is deck building more or less expensive in Longmont than elsewhere?

Licensed trade labor in Longmont runs about 105% of the national average, and the best crews book out fastest in spring and early summer. Colorado weather drives material choices here, so ask contractors what they install most often in Longmont and why.

Do I need a permit for deck building in Longmont, Colorado?

Most Longmont, CO projects that change structure, electrical, plumbing or mechanical systems need a permit from the local building department; cosmetic work usually does not. Always confirm current requirements with the local building department before signing a contract, and make sure the permit is pulled by your licensed contractor.

How many quotes should I get in Longmont?

Get at least three written quotes from licensed, insured Colorado contractors. Comparing line items — not just the bottom line — is the fastest way to spot an inflated bid in the Longmont metro market.

How much does a deck cost per square foot?

$15 to $80 per square foot installed. Pressure-treated pine runs $15–$35, composite $30–$60 and tropical hardwood $40–$80.

Is composite decking worth it?

Composite costs roughly twice as much upfront but eliminates staining every two to three years, so it typically wins over a 15+ year hold.

Do I need a permit for a deck?

Almost always if the deck is attached to the house or more than 30 inches above grade. Permits run $150 to $800.

How long does deck construction take?

One to two weeks for a standard deck, plus permit review time before the crew starts.

Does a deck add value to my home?

A wood deck addition typically returns 50% to 65% of its cost at resale, and it is one of the most-requested outdoor features in listings.

What is the cheapest way to build a deck?

Keep it rectangular, ground level and under 200 square feet, frame and surface it in pressure-treated pine, and skip railing, stairs and picture framing.

Home/Cost guides/Deck Building/Longmont, CO

Longmont metro · Colorado

Deck Building cost in Longmont, CO

Longmont homeowners typically pay $4,600 – $12,600 for deck building. Local labor and materials price 5% above the national average.

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Longmont average

$8,400

Typical low

$4,600

Typical high

$12,600

Per square foot

$16 – $84

Sample ZIP

What drives Longmont pricing

Local labor

Licensed trade labor in Longmont runs about 105% of the national average, and the best crews book out fastest in spring and early summer.

Permits & code

Most Longmont, CO projects that change structure, electrical, plumbing or mechanical systems need a permit from the local building department; cosmetic work usually does not.

Climate & conditions

Colorado weather drives material choices here, so ask contractors what they install most often in Longmont and why.

Instant cost calculator

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Deck size350 square feet

Decking material

Height above grade

Railing

Shape

Estimated project cost

$5,600 – $12,950

Most homeowners pay around $9,275

Compare decking material

Cost by material in Longmont

Installed Longmont pricing per square foot.

Option	Installed cost	Pros	Cons
Pressure-treated pine	$16 – $37	Cheapest framing and surface option	Needs sealing every 2-3 years; can warp
Cedar	$26 – $47	Naturally rot resistant, ages well	Soft surface, annual maintenance
Redwood	$32 – $53	Rich color, stable	Limited supply outside the West
Composite (Trex, TimberTech)	$32 – $63	No staining, 25-year warranties	Gets hot in sun, higher upfront
PVC / cellular vinyl	$37 – $74	Fully waterproof, lightest maintenance	Most expensive mainstream option
Tropical hardwood (ipe, cumaru)	$42 – $84	Extremely durable, premium look	Hard to cut, needs oiling to keep color
Aluminum	$47 – $95	Will not rot, rust or burn	Industrial look, noisy underfoot

Where the money goes in Longmont

A typical $8,400 Longmont project, broken down by line item.

Decking & railing material45% · $3,780
Labor35% · $2,940
Framing, footings & hardware15% · $1,260
Permits & disposal5% · $420

Common add-ons

Extras that show up on Longmont quotes but rarely in the headline price.

Stairs

Per step

$105 – $265

Built-in bench seating

$630 – $2,650

Pergola or shade structure

$2,650 – $9,450

Under-deck drainage

$1,600 – $5,250

Deck lighting

$420 – $2,650

Old deck demolition

Per square foot

$5 – $16

Permit

$160 – $840

Ways to save in Longmont

Keep the deck rectangular and under 200 sq ft where codes ease off.
Frame with pressure-treated lumber and spend only on the visible deck surface.
Build ground level — every foot of elevation adds framing, footings and railing.
Schedule in fall when builders discount to keep crews busy.
Skip fascia wraps and picture framing details that add labor with no structural value.

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More Longmont research

Best deck building companies in Longmont Deck Building permits in Colorado Deck Building near me All Colorado prices

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Other project costs in Longmont

Fence Installation in Longmont

$1,575 – $4,200

Roof Replacement in Longmont

$8,925 – $35,700

Kitchen Remodel in Longmont

$18,900 – $99,750

HVAC Replacement in Longmont

$5,775 – $18,900

Window Replacement in Longmont

$473 – $1,575

Bathroom Remodel in Longmont

$6,825 – $39,900

See every Longmont cost guide