Cedar vs. Pressure-Treated Wood for Decks: How to Choose
Neither wood wins outright. Pressure-treated lumber is usually the better choice for framing, posts and anything near soil or standing moisture. Cedar is usually the better choice for the surfaces you see and touch: deck boards, rails and trim. Many of the best decks use both, each in the place where its strengths count.
This guide explains the real differences in cost, durability, upkeep and appearance. It also covers what to check on the lumber’s end tag and why, in New York City, the wood is only one piece of a permitted project.
TL;DR
Pressure-treated (PT) wood tolerates moisture and ground contact better and costs less. Cedar looks better, works easily and takes stain well.
Typical material prices run about $3 to $7 per square foot for cedar and $2 to $5 for pressure-treated wood. Those are material ranges, not installed quotes.
Use PT for posts, joists and beams, and cedar for visible boards and railings. Detailing and drainage matter more than species.
Ask for the exact AWPA Use Category on the end tag, not just “pressure-treated.”
In NYC, a new deck needs a permit and filed drawings, whichever wood you choose.
Table of Contents
The short comparison
Factor | Cedar | Pressure-treated |
Best location | Above-ground, visible parts | Posts, joists, beams, low or damp areas |
Material cost | Higher | Lower |
Appearance | Natural color and grain | Greenish or brown tint, stain-dependent |
Surface hardness | Softer, dents and scratches easily | Harder, but can check and splinter |
Ground contact | Not the right choice | Yes, if rated for it |
Upkeep | Regular cleaning and refinishing to hold color | Cleaning and sealing as it dries and weathers |
The table matches what the main reference sources say. HGTV describes treated wood as the sturdier, more weather-resistant option, and cedar as the more attractive one. Angi’s comparison lands in the same place.
What pressure-treated wood actually is
Pressure-treated lumber is ordinary wood, often southern yellow pine, forced full of preservative under pressure. The treatment protects it from fungal decay and insects. The USDA Forest Service’s guidelines on treated wood note that wood used outdoors is vulnerable to decay and insect damage when it stays wet, and that preservative treatment is the most common way to protect it.
The key point is that “pressure-treated” is not one product. Each board is treated for a particular level of exposure. A board meant for a dry, above-ground railing is not the same as one meant to sit in the soil.
Reading the end tag
The American Wood Protection Association (AWPA) sorts treated wood into Use Categories. Its guidance for code officials says AWPA standards are directly listed in the IRC and IBC, and that the first thing to look for on the jobsite is “AWPA U1” on the end tag. Its guidance for specifiers adds the other items to check: the preservative, the retention, the Use Category and the accredited inspection mark.
For deck work, three categories come up most:
UC3B: exterior above-ground use, including exposure where the coating is poor or water runs off badly.
UC4A: ground contact and general use.
UC4B: heavy-duty ground contact.
If a lumberyard tag does not show the category you need, do not guess. A stain or sealer cannot turn non-rated lumber into ground-contact material.
What cedar brings to a deck
Cedar has a natural color and grain, cuts and fastens easily, and accepts stain and sealer well. You can also leave it unfinished and let it weather to a soft gray.
The trade-offs are real:
Softer surface. Dents and scratches show more, especially under furniture, grills and planters.
Checking and splintering. Surface cracks appear as the wood dries and wets.
Refinishing. HGTV says cedar commonly needs refinishing every two to three years if you want to keep its look. Family Handyman reports that the surface can gray after a year or two as UV light breaks down the surface fibers.
If you like the silver-gray look, cedar asks little of you. If you want the honey-red color, plan on a maintenance calendar.
Cost: material price is not project price
Angi’s August 2025 figures put cedar at roughly $3 to $7 per square foot and pressure-treated wood at $2 to $5. Consumer Reports notes that pressure-treated southern yellow pine has long been the cheapest and most abundant wood decking, though supply shortages have narrowed the gap at times.
Those are national material ranges. Here is what they leave out for a job in New York City, Long Island, Westchester or northern New Jersey:
Demolition and disposal of an existing deck
Footings or piers, and any engineering
Permit filing and professional fees
Stairs, guards and railings
Hardware and flashing
Site access, which on a tight city lot can add real labor
On a typical deck, the difference between PT and cedar decking boards is often a modest share of the total. The framing, labor, code work and finish usually cost more than the board choice. Ask any contractor to price the whole assembly, not just the boards.
How long each one lasts
Angi reports typical service lives of 15 to 30 years for both materials in relatively dry conditions with upkeep. That is not a guarantee. Water exposure, installation quality, lumber grade and maintenance can move the result a long way in either direction.
The more useful lesson comes from the USDA. Its guidance says to choose preservatives and construction details together. A deck fails mostly because water gets in and stays there, not because of the species name. Common causes include:
Joist tops left unprotected
Boards laid tight with no gap or airflow
Cut ends and drilled holes left untreated
Wrong or corroding fasteners
Soil or leaves piled against framing
USDA Forest Products Laboratory research also shows that preservative performance depends on the system and the severity of exposure. A cold-weather climate does not make every treatment equal, which is why the Northeast calls for specifying the category rather than trusting a generic lifespan claim.
Where each wood belongs
Use pressure-treated wood for
Posts and piers that touch or sit near soil
Joists, beams and ledgers that stay damp or have little clearance
Low decks close to grade, where air cannot dry the underside
Stair stringers and other parts exposed to splash
HGTV points to ground-contact-rated treated wood as suited to soil exposure and good for support posts and joists. Family Handyman likewise treats ground-contact PT as the fit for low decks.
Use cedar for
Deck boards you walk on barefoot and look at every day
Handrails, benches and privacy screens
Pergolas, arbors and trim
These are above-ground, appearance-sensitive parts where cedar’s grain and workability pay off.
The mixed approach
The most practical answer is often both: rated PT for the frame and cedar for the surface. You get the exposure tolerance underneath and the look on top. It only works if the details match. Connectors, flashing and drainage must suit treated lumber, and every field cut needs the right preservative, because treatment does not penetrate evenly.
Three examples
These are illustrative scenarios, not client case studies.
A rear-yard deck on a Long Island home, two feet off the ground. Little airflow underneath means the frame stays damp. Ground-contact PT for posts and joists makes sense, with either PT or cedar boards depending on budget and how much upkeep you want.
A Westchester back deck with a view and frequent entertaining. Raised high, with good airflow. Cedar boards and rails look warm and feel good underfoot, on a PT frame. Plan on cleaning and sealing.
A multifamily building in northern New Jersey with a shared rear patio. The property manager wants predictable cost and low callbacks. A written specification naming the AWPA Use Category for each member avoids arguments with suppliers and keeps replacements consistent.
Specifying lumber for commercial and managed properties
If you manage a building, do not write “pressure-treated wood” on a purchase order. AWPA’s categories separate interior dry, exterior above-ground, ground-contact and marine exposures. Name the category and the preservative, and require the end tag to match. That gives you something to inspect on delivery and something to point to if a board fails early.
Permits: in NYC, the wood is the easy part
The wood decision sits inside a larger compliance picture. According to the NYC Department of Buildings, deck and porch work needs a construction permit and approved construction documents, and a permit exemption does not excuse compliance with other laws or rules. The DOB’s deck and porch project page says the documents must be submitted by a New York State licensed professional engineer or registered architect. It lists foundations, posts, lateral bracing, beams, walking surface, anchorage to the building, guards and steps among the elements involved.
That is why design review, anchorage, guard heights and stairs deserve as much attention as cedar versus PT. If you are planning one, these guides from our team cover the surrounding rules:
Rules differ in Long Island towns, Westchester municipalities and New Jersey townships, so confirm local requirements before ordering lumber.
Our perspective
We are a general contractor working across NYC, Long Island, Westchester and northern New Jersey, on both residential and commercial projects. When owners ask us which wood to use, we start with a different question: where will each piece sit, and how will water leave it?
Our advice follows from that:
Classify the exposure first. Above ground, poor runoff or ground contact. The category decides the lumber.
Put the money where it shows. A cedar surface on a properly rated frame usually beats an all-cedar deck whose hidden parts rot early.
Be honest about upkeep. If you will not refinish cedar every few years, choose it for the gray weathered look or choose PT. Both are fine decisions.
Detail for drainage. Gaps, ventilation, protected end grain and compatible fasteners do more for lifespan than a premium species.
Treat the permit as part of the design. Wood choice, structure and code review belong in one plan, not three separate conversations.
We work with clients on exterior renovations, decks and patios, masonry restoration and code compliance, and we prefer to price the complete assembly so there are no surprises. Our work is carried out in accordance with applicable local laws, licensing requirements, building codes and insurance regulations.
— DJ
Planning a deck or exterior project?
If you are weighing cedar, pressure-treated lumber or a mix, we can walk the site with you, talk through exposure and upkeep, and take the project from design coordination through construction. See our exterior renovation services, or contact DJ Custom Contracting to discuss your property. Property and facility managers can also ask about our building and facility maintenance work, including exterior envelope repair and waterproofing.
FAQ
How long does cedar last compared with pressure-treated wood?
In relatively dry conditions with upkeep, Angi reports typical lifespans of 15 to 30 years for both. Real results depend on moisture, installation, lumber quality and maintenance. Pressure-treated wood rated for ground contact generally holds up better in damp structural locations.
Is cedar or pressure-treated wood better for a deck?
It depends on the part of the deck. Pressure-treated lumber is typically better for posts, joists and low-clearance framing. Cedar is typically better for visible boards, rails and trim. Combining them is common.
Can I use cedar for deck posts in the ground?
It is not the usual choice. Posts and other members in soil contact are generally built from pressure-treated lumber carrying a ground-contact rating such as UC4A. Check the end tag rather than relying on the label alone.
Does pressure-treated wood need to be sealed?
It is not maintenance-free. It can crack, check, warp and splinter as moisture changes, so cleaning and sealing help. Always treat field cuts and drilled holes with a preservative suited to the exposure.
Do I need a permit for a deck in NYC?
Yes. The NYC DOB says deck and porch installations need a construction permit and approved documents, filed by a New York State licensed engineer or registered architect. Check with your local building department if you are outside the city.
Sources
Cedar vs. Pressure Treated Wood: Which Should You Choose? (Angi)
How to Choose Between Cedar, Pressure Treated Wood & Composite (Family Handyman)
Guidelines for selection and use of pressure-treated wood (USDA Forest Service)
USDA Forest Products Laboratory research on preservative performance
NYC DOB: Project Requirements for Owner, New Deck and Porch Installation
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