Composite Decks in Wilmington, NC

What is capped composite, and how is it different from PVC?

Ask the company which product line the bid prices, and read that maker's page for what the board is made of and its care and warranty terms. When you ask for composite deck installation, say whether you mean capped composite, uncapped composite or PVC. A bid that says only "composite" is missing the line, the color and the board profile. A bid for PVC decking installation should name the maker's PVC line.

For capped composite decking installation, ask each company to name the exact product line on the bid. Then read that maker's installation guide and warranty page yourself, and ask the company to show the page it follows for spacing and fastening.

How much do composite decks cost in Wilmington?

Composite decking cost per square foot looks different depending on whether the number covers boards only, boards with labor, or the whole deck with framing and railing. This table keeps those scopes apart. None of these is a quote for your yard.

The two Trex rows are not a typo. The first covers boards alone. The second adds the railing and the frame under them. That is why a Trex deck cost can read $5 to $10 or $10 to $27 per square foot. Ask any company whether its number is boards, boards plus labor, or the finished deck.

What does a 200 or 300 square foot composite deck cost?

Multiply your square footage by the range, then add the lines the per-foot figure leaves out. This is arithmetic on the sources above, not a new price.

• 200 sq ft, Wilmington guide: composite $7,000 to $7,400; pressure-treated $3,600 to $4,200.
• 300 sq ft, Wilmington guide: composite $10,500 to $11,100; pressure-treated $5,400 to $6,300.
• 200 sq ft, national installed range: $5,000 to $10,800.
• 300 sq ft, national installed range: $7,500 to $16,200.

A 2021 article is old. Material prices have moved since, so use the Wilmington rows as a starting point for your questions, not a promise. Ask any company what its number covers.

What moves the price of a composite deck?

• The line you choose. Entry capped boards and premium lines can sit far apart. The national boards-only range, $12 to $22 per square foot, shows the spread.
• Frame. HomeAdvisor lists labor at $15 to $35 per square foot with framing adding $9 to $12. A new frame costs more than reusing a sound one.
• Height and shape. Raised and multi-level decks cost more per square foot. The deck builders page has the national type table.
• Railing system. Composite railing installation, aluminum, cable and glass all price differently.
• Corrosion-resistant hardware. Ask for it as its own line near salt water.
• Removal of the old deck. $5 to $15 per square foot nationally.
• Permit and inspection fees. County fees are in the table.

Is a composite deck cheaper than wood over the years?

Not at the start. In the 2021 Wilmington guide, installed composite came out about $2,800 to $3,800 higher than pressure-treated pine on a 200 square foot deck. The question is what you spend on wood after the build. HomeAdvisor lists staining at $550 to $1,250 and sealing at $550 to $1,330 per deck. That gap equals roughly two to seven staining jobs, before any board or frame repair. How many jobs you would need depends on the finish and how often its label says to renew it. Ask a wood bidder for the renewal schedule in writing, then do the math for your own plan.

That is the honest answer to "composite deck vs wood deck cost". Composite is not free to own, and maker Trex says as much: its FAQ describes much lower upkeep than wood, but not zero (trex.com FAQ, read October 30, 2026). If you want the wood side priced, the deck staining and sealing page covers it.

Which composite brands do Wilmington buyers ask about?

Buyers name Trex, TimberTech, AZEK, Fiberon, Deckorators and MoistureShield. Each maker sets its own lines, colors, install rules and warranty. That is why a company that says "we use the best brand" has told you nothing. Ask for the product line, the color and the maker's installation guide for it.

When you compare composite deck builders, ask each one which makers it works with and why. On price, we found no TimberTech composite deck cost for Wilmington. The only sourced brand figure is the Trex boards-only range in the table, so ask each company to price your TimberTech line by name and keep the line, color and profile on the bid.

• Trex deck builders and Trex decking installation. Trex publishes its own FAQ and warranty pages. Ask which line the bid prices and what that line's fade and stain terms say.
• TimberTech deck installation. Ask which TimberTech line the bid prices, and which warranty covers each part of it: boards, railing and any framing.
• AZEK deck installation. Ask the maker's page which of its lines is PVC and which is capped composite, then ask the company to write the line on the bid.
• Fiberon, Deckorators and MoistureShield. Ask each maker for the warranty for the board named on your bid.

We do not rank these makers. We found no source that compares them fairly for Wilmington, and prices vary by line more than by logo. If one company installs a single brand and another installs several, ask each why, and ask whether the maker's warranty needs anything special from the installer.

What do composite decking warranties cover, and who stands behind them?

There are two warranties, and they are different documents. The maker's warranty covers the board, and sometimes the railing, against defects, and sometimes against fade and stain. The builder's workmanship warranty covers the labor, and it is the company's own promise. Wilmington Deck Builders Pros states no warranty term, because Wilmington Deck Builders Pros does not build.

Trex's FAQ lists limited warranties of 25, 35 and 50 years, depending on the product (trex.com FAQ, read October 30, 2026). That tells you the term depends on the product line, and that the headline number is a limit, not a promise of 50 trouble-free years. Ask for the warranty text for your exact line and order date. The same FAQ advises against painting or staining its boards, because that may void the fade-and-stain coverage. A warranty can end because of how you care for the deck, so read the care section too.

Questions to put to every company:

• Which warranty applies to my board, my railing and my fasteners, and can I have each in writing?
• Does the maker's warranty still apply at my address? (See the salt-air section below.)
• How long is your workmanship warranty, what does it cover and what voids it?
• If the maker denies a claim, what do you do?

Is composite decking a good fit for Wilmington's weather?

NWS Wilmington's 1991 to 2020 normals put annual rainfall above 60 inches for the first time. In 2018 the city recorded 102.40 inches, the wettest year in its history, and Hurricane Florence alone dropped 23.02 inches at the airport (NWS Wilmington). Wood that stays wet decays, and NC State Extension says the fungi that rot wood will not grow when wood moisture is under 20 percent. Ask each company how the boards and the frame under them shed water. Wood also draws pests. The Onslow County Extension office says carpenter bees are drawn to bare, unpainted or weathered wood and seem to prefer softwoods such as cedar, cypress or pine. Its page does not mention decks, so read it as a general warning about bare wood, and ask any wood-deck bidder how the wood will be finished.

The second weather fact is heat. NWS Wilmington's 2025 summary counts 44 days at 90 degrees or higher and 61 days with thunderstorms. Trex's FAQ says its decking gets hot in direct sun on hot days. No maker we read promises a cool board, and we will not either. Ask for a full-size sample, set it in the sun at your site and test it barefoot before you pick a color.

Snow barely matters here. NWS puts average snowfall at 0.9 inch a year. Trex's FAQ advises plastic shovels, not metal, on its boards, which is a one-line note for most Wilmington owners.

What should I ask about composite decking for coastal homes?

Ask the company for the maker's warranty text for your board and read it for any limit on coastal or salt-water sites. Get the answer in writing before you order.

For a beach house, a sound-front lot or a home near the river, put these in writing before you sign:

• The distance from your lot to salt water, and what the maker's warranty says about that distance.
• The screw, clip and connector metal, and why the company chose it for salt air.
• Whether framing is wood, treated wood or aluminum, and what the warranty for the frame says about coastal sites.
• Whether a coastal permit applies to your lot. The county says a CAMA permit is required for most development in a coastal Area of Environmental Concern, and its page does not mention decks, so ask the local permit officer.

We found no code rule or hardware guidance we could read, so we state none.

What goes under composite boards?

Boards sit on joists. We do not print a spacing number because we could not verify one. Ask the company to show the page of the maker's installation guide it follows for joist spacing, and to put the number on the plan.

• Joist tape. Ask whether the plan includes tape on top of the joists and what the company says it does.
• Fasteners. Ask which fasteners the maker approves for your board.
• Gaps and expansion. Ask the company to show you the page of the maker's guide it follows for gaps, and have the bid say it follows that guide.
• Ledger and flashing. Where an attached deck meets the house, ask how the ledger is flashed.
• Footings. Ask for the type and size in writing and who confirmed them with the county. We state no depth here. NC811 asks for notice three working days before digging, and says private lines on private property are not marked (nc811.org, read October 30, 2026).
• Ground clearance. NC State Extension says untreated wood should be at least 8 inches from soil. That page is about houses and crawlspaces, so use it as a question about your frame, not a deck rule.

How do I care for a composite deck?

Wash the way the maker's guide says, and check the guide on pressure washers, stain removers and grill mats. Do not paint or stain composite unless the maker allows it, because Trex warns that doing so may void its fade-and-stain coverage. Once a year, check railing posts, stair treads and visible fasteners for movement or rust. The frame under the boards is wood or metal and needs a look too. If you find soft spots or a loose ledger, call a deck repair company; the deck repair page covers those prices.

What do composite railings, stairs and lighting cost?

Composite deck railing installation is one of the larger lines on a bid. HomeAdvisor lists railing at $35 to $210 per linear foot, so ask for the railing system as its own line. Wilmington logged 61 days with thunderstorms in 2025 (NWS Wilmington), so ask how every railing post is anchored to the frame. Stairs run $25 to $50 per stair for wood and $1,000 to $3,000 per set for metal. Ask for the stair count on the bid. Guard height, baluster spacing and stair dimensions come from the building code, and we found no readable code text for them, so we print none. Ask the county inspector, and ask the company to write its numbers on the drawing.

Lighting is $8 to $30 per fixture nationally, plus the wiring. Wiring is an electrical trade. The county's fee page says trade permits are included in its residential permit fees.

Can composite go over my old deck, or should I replace it?

New boards on an old frame can work only if the frame is sound. About 39 percent of Wilmington homes (26,074 of 67,186 housing units) were built before 1980, and the median home was built in 1990 (ACS 2024, 1-year estimates). That is house age, not deck age, so ask when your deck was built. Ask the company to check the ledger and flashing, the joists, the posts and the footings before it quotes composite boards for an old frame, and ask for photos of anything it finds.

Composite deck replacement usually has two bids: boards only on a reused frame, or a full tear-out and new build. Fixr's guide (January 31, 2025) puts full replacement of a 300 square foot deck at $6,000 to $18,600. Removal alone is $5 to $15 per square foot. Price the two options on separate lines so you can see what the new frame adds. Ask the county whether your replacement counts as new construction.

Do composite decks need a permit in Wilmington?

The county pages we read do not mention decking material. Ask the county whether the material changes anything. New Hanover County's Department of Permits and Inspections issues all building permits inside the City of Wilmington. You apply through the county's COAST online portal or in person at the County Government Center (City of Wilmington building permits page, read October 30, 2026). The county's FAQ says most construction projects need a building permit and lists structural work. It does not name decks, and its "Do I Need a Permit?" page holds no readable list, so we state no trigger. Ask the county and write down the answer.

• Fees. $60 for a minor permit with one inspection, or $0.221 per square foot with a $400 minimum for work needing two or more inspections. A $50 fee applies after two failed inspections.
• City check. The city asks you to confirm the structure meets its Land Development Code before you apply. A project in a local historic district also needs a Certificate of Appropriateness.
• Inspections. County visits run 8:00 am to 5:00 pm. Next-business-day requests go into COAST before 3:30 pm. A visit takes 5 minutes to 2 hours, with no guaranteed window.
• Expiry. A permit expires if work has not started in six months, or stops for 12 months.
• Code edition. Per the NC Office of State Fire Marshal (April 7, 2025), the 2018 North Carolina State Building Code stays in effect until the 2024 code's date is set. Check the current status with the county.

Some neighborhoods have covenants or an architectural committee. We found no source on whether Wilmington-area homeowners' associations restrict composite, so ask your association for its rules and review time before you sign.

How long does a composite deck take?

We found no sourced Wilmington build time. These pieces set the schedule, so get dates in writing:

• Design and quote: how fast you decide.
• Board ordering: ask about lead time for your line and color.
• Zoning check, association review and permit review: ask each office for its current time.
• Utility locate: three working days before digging.
• Build days: size, height and design.
• Inspections: requests by 3:30 pm for the next business day.
• Weather: with more than 60 inches of rain in a normal year, ask for the rain plan.

How do I compare composite deck quotes?

A composite deck quote or composite deck estimate should let you place two bids side by side. Use this list on every bid, whether it comes from a composite deck installer or from one of several composite deck contractors.

• The maker, product line, color and board profile.
• Joist spacing and the maker guide the company follows.
• Fastener type and metal, hidden or face.
• Railing brand and system, and the stair count.
• Footing type and size, and ledger flashing method.
• Who pulls the permit, who pays the fee and who requests inspections.
• Removal of the old deck, as a separate line.
• Workmanship warranty in writing, and the maker's warranty for each part.
• Payment stages, with the last payment after the final inspection and punch list.

Ask what license or registration the company holds and check it with the issuer. The county FAQ says projects worth $40,000 or more generally require a licensed general contractor. For smaller jobs, ask what registration, if any, applies, and ask for proof of insurance and for recent references. The company is the one that has to prove these, not Wilmington Deck Builders Pros. Ranking words on a company's own page are claims, so judge by the paper. For the whole project path, from first call to final walk-through, the deck builders page walks through it. Questions about the site? See the contact page.

What goes wrong with composite decks?

• Boards that get hot underfoot. Trex says its decking gets hot in direct sun on hot days; test a sample.
• Joist spacing not on the plan. Ask the company to put the number on the plan and show the guide page it follows.
• Gaps not specified. Ask the company to show you the page of the maker's guide it follows for gaps.
• Water at the ledger. Ask about flashing.
• Painting or staining against the maker's advice. It may void the warranty.
• Coastal limits in the warranty. Ask the company for the maker's warranty text for your board and read it for any limit on coastal or salt-water sites.
• Skipped permit. Ask the county what record it keeps, and keep your final inspection record.

Composite decks in Wilmington FAQ

Call for a composite deck company in Wilmington

Call. We call you back within one business day and connect you with a local deck company. You pay Wilmington Deck Builders Pros nothing for the call.

Calls reach a voicemail box. Leave your name, your town and a short description of the job.

Call (804) 889-2677

Have the deck size, the door height above the ground, the board line you like and any association rules ready.

Sources

1. HomeAdvisor, Build a Deck cost guide (page dated June 17, 2026)
2. HomeBlue, Wilmington NC cost to build a deck (article dated December 17, 2021; read October 30, 2026)
3. Fixr, Deck Repair Cost (page updated January 31, 2025; read October 30, 2026)
4. Trex FAQ (read October 30, 2026)
5. New Hanover County, Permit Cost (read October 30, 2026)
6. New Hanover County, Frequently Asked Questions (read October 30, 2026)
7. New Hanover County, CAMA Permit Program (read October 30, 2026)
8. City of Wilmington, Building Permits (read October 30, 2026)
9. NC Office of State Fire Marshal, 2024 code delay (April 7, 2025; read October 30, 2026)
10. NC811 (read October 30, 2026)
11. NWS Wilmington, 1991-2020 climate normals (read October 30, 2026)
12. NWS Wilmington, race to 100 inches (read October 30, 2026)
13. NWS Wilmington, 2025 climate summary (read October 30, 2026)
14. NC State Extension, powderpost beetles and wood-inhabiting fungi (read October 30, 2026)
15. NC State Extension, Onslow County, carpenter bees (read October 30, 2026)
16. American Community Survey 2024 1-year, via Census Reporter (read October 30, 2026)