The Main Difference: What Each One Is Made From

A deck is a raised platform built from wood, composite, or metal that sits above ground level, usually attached to your house. A patio is a flat, ground-level surface made from concrete, pavers, stone, or brick that sits directly on the earth. The material choice determines how you build it, how much it costs, and how often you maintain it.

Decks require a foundation of posts sunk into the ground, a frame structure underneath, and boards or composite planks on top. Patios are built by preparing the ground, laying a base layer of gravel or sand, and then setting your surface material on top. Because decks are elevated, they need railings and stairs. Patios sit flush with your yard, so they don't.

The elevation difference matters more than it sounds. A deck keeps you above moisture, insects, and ground-level flooding. A patio drains water away through the base layer and sits cooler in summer because it's in contact with the earth. Neither is objectively better—the right choice depends on your yard, budget, and how you plan to use the space.

Key Takeaways

  • Decks are raised wooden or composite platforms that require posts, framing, and railings; patios are ground-level surfaces made from concrete, pavers, or stone.
  • Decks cost more upfront but can work on uneven or sloped yards; patios cost less but require level or nearly level ground.
  • Wood decks need annual staining or sealing and can develop rot; patios need occasional weeding and pressure washing but last longer without structural decay.
  • Decks feel warmer underfoot and stay drier; patios stay cooler and drain water naturally through the base layer.
  • Local building codes require deck permits and inspections; patio rules vary by size and location but are often less strict.

Cost Differences: What You'll Actually Spend

Decks typically cost between $25 and $50 per square foot for pressure-treated wood, and $35 to $60 per square foot for composite materials like Trex or TimberTech. A 12-by-16-foot deck (192 square feet) in pressure-treated wood runs roughly $4,800 to $9,600 before labor. Composite costs more upfront but lasts longer and needs less maintenance.

Patios run $8 to $25 per square foot depending on material. Concrete is the cheapest at $8 to $15 per square foot. Pavers cost $15 to $25 per square foot. The same 12-by-16-foot space in concrete costs $1,500 to $3,000; in pavers, $2,900 to $7,700. Labor is usually included in these estimates because both require skilled installation.

The hidden costs differ. Decks need sealing or staining every two to three years (a few hundred dollars for a medium deck) and occasional board replacement. Patios need weeding, occasional pressure washing, and paver replacement if one cracks, but these are smaller expenses spread over time. A wood deck may need structural repairs after 15 to 20 years; a patio can last 25 to 30 years with minimal intervention.

Maintenance: Time and Money Over the Years

Wood decks demand the most attention. Every two to three years, you sand and stain or seal the surface to prevent rot, splintering, and water damage. This takes a weekend and costs $300 to $800 depending on size. You'll also inspect posts and boards annually for rot, replace damaged boards as they appear, and keep gutters clean so water doesn't pool underneath.

Composite decks need less work. You sweep off debris, wash them with a garden hose or mild soap, and avoid pressure washers (which can damage the surface). Staining is not necessary. They don't rot, but they can stain and fade slightly over time. Some composite boards develop mold in very humid climates, which you can clean with a soft brush.

Patios are the lowest-maintenance option. Sweep or blow off leaves and dirt regularly. Pressure wash once or twice a year to remove algae and mildew. Pull weeds from between pavers if you have them. If a single paver cracks, you can replace just that one. Concrete may crack over time due to freeze-thaw cycles or settling, and those cracks can be sealed or left alone depending on how they look.

Drainage and Water Handling

Decks shed water quickly because they're elevated and boards are spaced to let water through. This keeps the underside dry and prevents pooling, which is why decks work well in rainy climates or yards with poor drainage. The downside: water drips onto whatever is below, so you can't put a shed or storage under a deck without protection.

Patios are built with a slight slope (usually 1 to 2 percent grade) to direct water away from your house and yard. Water soaks into the gravel or sand base layer and drains into the soil. In areas with heavy clay soil or poor drainage, water can pool on the patio surface or underneath, causing frost heave in winter (the ground freezes and pushes the patio up). This is why patios in cold, wet climates sometimes need a perimeter drain or a thicker base layer.

If your yard stays wet or floods occasionally, a deck is the safer choice because it keeps you above the water. If your yard drains well and you want a surface that stays cool and doesn't require annual sealing, a patio works better.

Yard Slope and Ground Conditions

Decks adapt to uneven or sloped yards. You can build posts at different heights to level the deck surface, making them ideal for hillside properties or yards with significant grade changes. This flexibility is one reason decks cost more—the engineering is more complex.

Patios need relatively level ground. If your yard slopes more than a few inches over the patio area, you'll need to either excavate and level the ground (expensive) or build a retaining wall on the downhill side. On a gentle slope, the patio's built-in grade for drainage handles it. On a steep slope, a deck is often the only practical option.

If you have a rocky or clay-heavy yard, a deck is easier to install because you're just digging post holes. A patio requires removing topsoil, compacting the base, and ensuring proper drainage—more labor upfront but a more stable surface once it's done.

Building Codes and Permits

Decks almost always require a building permit and inspection, especially if they're attached to your house or elevated more than 30 inches. Inspectors check that posts are properly sunk, the frame is structurally sound, railings meet code (usually 36 to 42 inches high with balusters spaced no more than 4 inches apart), and stairs have the right rise and run. Permit costs vary by location but typically run $50 to $200.

Patios have looser rules. Many jurisdictions don't require a permit for a patio under a certain size (often 200 square feet), especially if it's not attached to the house. Larger patios or those near property lines may need a permit. Check with your local building department before you start—rules vary significantly by city and county.

Both decks and patios may have setback requirements (how far from property lines they must be) and HOA restrictions if you live in a planned community. These are worth checking before you commit to a design.

Lifespan and When to Replace

A pressure-treated wood deck lasts 15 to 20 years with regular maintenance. Composite decks last 25 to 30 years. Cedar or redwood decks are more rot-resistant but cost more and still need sealing every few years. At the end of its life, a deck needs complete replacement—the posts, frame, and boards all come out.

Patios last longer. Concrete typically lasts 25 to 30 years and can go longer if cracks are sealed. Pavers and stone can last 30 to 50 years or more. When a patio fails, you usually replace individual sections or pavers rather than the whole thing, which spreads the cost over time.

If you're planning to stay in your house for 20+ years and want a surface that will outlast you with minimal fuss, a patio is the better investment. If you like the look and feel of wood and don't mind regular maintenance, a deck is worth the extra work.

Frequently Asked Questions

Can I build a deck on top of a patio?

Yes, you can build a low-profile deck (sometimes called a ground-level deck) directly on top of a patio. The patio provides a stable, level base, and you avoid digging post holes. This works well if you want to add a deck later without removing the patio underneath. Make sure the patio can support the weight and that you leave gaps for water drainage.

Which one is better for a small yard?

A patio usually makes more sense for a small yard because it doesn't require railings or stairs, so it takes up less visual space. A deck needs clearance for railings and stairs, which eats into a tight footprint. Patios also feel more spacious because they're flush with the ground.

Can I put a hot tub on either one?

A hot tub is very heavy (3,000 to 5,000 pounds when filled). A deck can support one if it's properly engineered with reinforced framing and posts—tell your contractor about the hot tub before building. A patio can also support a hot tub, but you need to make sure the base is compacted and level so the tub doesn't shift or crack. Either way, plan for the weight during construction.

What happens to a deck in winter?

Wood decks expand and contract with temperature and moisture changes, which can cause warping, cupping, and splitting. Snow and ice sit on the surface longer than on a patio. Composite decks handle freeze-thaw cycles better than wood but can still be slippery when icy. Patios can develop frost heave (the ground freezes and pushes the surface up) in cold climates with poor drainage, but this is usually minor and settles back down in spring.

Do I need a contractor for either one?

Most people hire a contractor for both because they require proper grading, structural knowledge, and building code compliance. A small patio on level ground is sometimes a DIY project if you have experience with concrete or pavers. A deck almost always needs a professional because the structural requirements are strict and mistakes are expensive and unsafe.