Most deck cost charts give you one number per size and leave out what that number includes. This guide breaks the price down for eight common sizes, from a 10x10 landing to a 20x30 entertaining deck, in pressure-treated pine, cedar and composite. Every figure is labeled Dallas or national and names its source. For the per-square-foot side of the question, see our guide to what a deck costs per square foot in Dallas.
How much does a deck cost by size in Dallas? (10x10 to 20x30)
Multiply the deck's square footage by $15 to $30 for pressure-treated pine or $25 to $50 for composite, Block Renovation's 2026 Dallas installed ranges, and you get a 10x10 at $1,500 to $5,000 and a 20x30 at $9,000 to $30,000 depending on material. Those totals cover the deck surface only, before railing, stairs, a permit or tearing out an old deck.
The table below is our calculation, not a published price list. No source we found gives 2026 installed totals by size and material for Dallas, so we multiplied each size by the cited per-square-foot range. Block Renovation's Dallas guide has no cedar figure, so the cedar column uses its national 2026 range for cedar or redwood ($25 to $55 per square foot).
| Size | Sq ft | Pressure-treated (calculated from Block Renovation Dallas, $15 to $30/sq ft) | Cedar (calculated from Block Renovation national, $25 to $55/sq ft) | Composite (calculated from Block Renovation Dallas, $25 to $50/sq ft) |
|---|---|---|---|---|
| 10x10 | 100 | $1,500 to $3,000 | $2,500 to $5,500 | $2,500 to $5,000 |
| 12x12 | 144 | $2,160 to $4,320 | $3,600 to $7,920 | $3,600 to $7,200 |
| 12x16 | 192 | $2,880 to $5,760 | $4,800 to $10,560 | $4,800 to $9,600 |
| 16x16 | 256 | $3,840 to $7,680 | $6,400 to $14,080 | $6,400 to $12,800 |
| 14x20 | 280 | $4,200 to $8,400 | $7,000 to $15,400 | $7,000 to $14,000 |
| 16x20 | 320 | $4,800 to $9,600 | $8,000 to $17,600 | $8,000 to $16,000 |
| 20x20 | 400 | $6,000 to $12,000 | $10,000 to $22,000 | $10,000 to $20,000 |
| 20x30 | 600 | $9,000 to $18,000 | $15,000 to $33,000 | $15,000 to $30,000 |
Two things to keep in mind when you read it. First, the cedar column is national and its top end runs above composite because Block Renovation's national cedar range is wider than its Dallas composite range. That is a quirk of the sources, not proof that cedar costs more than composite in Dallas. Second, these are straight multiplications. They don't include any size discount a builder may offer on a larger job, because no source we found measures one.
National numbers for the same sizes
National size charts land in a similar place. Fixr's national guide (updated 2023) gives one installed band per size across all materials, and Advantage Lumber, a decking retailer, published 2026 national totals for three sizes at $25, $40 and $60 per square foot, using mid-range materials and professional installation, excluding permits and railings.
| Size | Fixr, national, 2023 (all materials) | Advantage Lumber, national, 2026 ($25 / $40 / $60 per sq ft) |
|---|---|---|
| 8x10 | $1,200 to $4,400 | Not listed |
| 10x10 | Not listed | $2,500 / $4,000 / $6,000 |
| 12x12 | $2,160 to $7,920 | Not listed |
| 10x16 | $2,400 to $8,800 | Not listed |
| 12x16 | Not listed | $4,800 / $7,700 / $11,500 |
| 10x20 | $3,000 to $11,000 | Not listed |
| 12x20 | $3,600 to $13,200 | Not listed |
| 14x20 | $4,200 to $15,400 | Not listed |
| 16x20 | $4,800 to $17,600 | Not listed |
| 20x20 | $6,000 to $22,000 | $10,000 / $16,000 / $24,000 |
An older local estimate points the same way. HomeBlue's 2021 Dallas estimate put an installed pine deck at $1,600 to $1,800 for 100 sq ft, $3,100 to $3,700 for 200 sq ft, $6,200 to $7,400 for 400 sq ft and $9,400 to $11,000 for 600 sq ft. Its composite figures were $3,000 to $3,200, $6,100 to $6,400, $12,100 to $12,800 and $18,200 to $19,200 for the same sizes. Treat those as a 2021 snapshot, not current prices.
What is the 2026 cost to build a 12x12 deck? (average cost, materials and labor, composite vs wood)
A 12x12 deck costs about $2,160 to $4,320 in pressure-treated wood and $3,600 to $7,200 in composite in Dallas before railing (calculated from Block Renovation's 2026 Dallas ranges), and the boards themselves are only about $650 to $1,000 of that. A 12x12 is 144 square feet, a common size for a first deck off a back door.
Here is how the 12x12 breaks down across the sources:
- Installed, Dallas (calculated): $2,160 to $4,320 pressure-treated; $3,600 to $7,200 composite; $3,600 to $7,920 cedar using the national cedar range.
- Installed, national (Fixr, 2023): $2,160 to $7,920 across all materials.
- Boards only (Decks.com): $648 in pressure-treated and $1,008 in composite. Decks.com says this is the decking material alone, excluding framing and labor.
- Labor: Decks.com puts labor at $8 to $22 per square foot, and Advantage Lumber puts professional installation at $15 to $35 per square foot nationally in 2026.
Composite brand matters too. Advantage Lumber's 2026 national installed figures are $45 to $70 per square foot for Trex, $40 to $70 for TimberTech and $40 to $60 for Deckorators Surestone. Those run above Block Renovation's Dallas composite range, so ask which board line a quote assumes.
Railing on a 12x12 deck
If a 12x12 deck is attached to the house along one side, it has three open edges: 12 + 12 + 12 = 36 linear feet before you subtract the stair opening. At Fixr's 2023 national railing rates of $30 to $50 per linear foot for wood and $80 to $165 for composite, that works out to about $1,080 to $1,800 in wood or $2,880 to $5,940 in composite (our calculation). On a composite deck, the railing can cost almost as much as the deck surface.
Many low decks don't need it. Block Renovation's 2026 guide says guards are required once the walking surface is more than 30 inches above the ground, at a 36-inch minimum height for single-family homes. Most DFW lots are fairly flat, which is why elevated decks are less common here.
Boards only vs installed: why online size prices disagree
Many size charts list only the decking boards, which are a fraction of an installed deck. Framing, footings, fasteners and labor make up most of the bill. If one site says a 20x20 deck costs $1,800 and another says $12,000, the first is usually quoting boards and the second an installed deck.
| Size | Boards only, pressure-treated (Decks.com) | Boards only, composite (Decks.com) | Installed pressure-treated, Dallas (calculated from Block Renovation) | Installed composite, Dallas (calculated from Block Renovation) |
|---|---|---|---|---|
| 10x10 | $450 | $700 | $1,500 to $3,000 | $2,500 to $5,000 |
| 12x12 | $648 | $1,008 | $2,160 to $4,320 | $3,600 to $7,200 |
| 16x16 | $1,152 | $1,792 | $3,840 to $7,680 | $6,400 to $12,800 |
| 20x20 | $1,800 | $2,800 | $6,000 to $12,000 | $10,000 to $20,000 |
Three separate sources agree that labor and framing are most of the bill, each in its own way:
- Block Renovation (2026): labor runs 50 to 65% of a deck budget.
- Trex: materials make up up to one third of the total cost of a professionally installed deck. Trex also puts composite deck material, including the substructure, decking, hardware and fasteners, at $15 to $30 per square foot.
- TimberTech (2026): decking material and fasteners are typically about 20% of total deck cost. In TimberTech's breakdown, substructure material and labor is 38%, decking, railing and labor 30%, decking material and fasteners 20% and railing material 12%.
The practical point: when you compare a board price at the lumber yard to a builder's quote, you are comparing a fifth or a third of the job to the whole job.
10x10 and 12x12 decks: what fits and what they cost
A 10x10 or 12x12 deck fits a small bistro or round table and a grill, and costs roughly $1,500 to $7,200 in Dallas depending on material (calculated from Block Renovation's Dallas ranges). Advantage Lumber's 2026 national figures for a 10x10 are $2,500, $4,000 or $6,000, at $25, $40 or $60 per square foot.
Fine Homebuilding's Scott Schuttner suggests about 20 square feet of deck per person for social use, plus extra space for furniture, grills and planters. By that rule of thumb (our arithmetic, before furniture), a 10x10 holds about 5 people standing and a 12x12 about 7. He also likes a minimum of 12 feet in both directions for a social area and 8 feet for a special-use area.
So a 10x10 works best as a landing, a grilling spot or a two-chair morning deck. A 12x12 is the smallest size that meets Schuttner's social-area minimum, but it gets tight with a full dining set (more on that below).
Small size also matters for permits. Small, low, freestanding decks can be exempt from a Dallas permit; see our Dallas deck permit guide for the exact conditions before you plan around it.
12x16, 14x20 and 16x16 decks: the mid-size range
Mid-size decks from 192 to 280 square feet are where a full dining set and a grill start to fit, at about $2,880 to $14,000 in Dallas across pine and composite (calculated from Block Renovation's Dallas ranges). Cedar on the national range runs $4,800 to $15,400 for the same sizes (calculated).
- 12x16 (192 sq ft): $2,880 to $5,760 pressure-treated or $4,800 to $9,600 composite in Dallas (calculated). Advantage Lumber's 2026 national figures are $4,800, $7,700 or $11,500. Seats about 9 people at 20 sq ft each (our arithmetic).
- 16x16 (256 sq ft): $3,840 to $7,680 pressure-treated or $6,400 to $12,800 composite in Dallas (calculated).
- 14x20 (280 sq ft): $4,200 to $8,400 pressure-treated or $7,000 to $14,000 composite in Dallas (calculated). Fixr's national 2023 band is $4,200 to $15,400.
Why this range matters for dining: Tim Carter of AsktheBuilder works out the space for a 4x6-foot table with chairs. Two feet of walking room behind each chair, 2 feet for each chair, 1 foot to pull it out and the 4-foot table add up to 2 + 2 + 1 + 4 + 1 + 2 + 2 = 14 feet, which gives him a 14 x 16-foot area for that table. Houzz's layout guide reaches a similar answer, calling for 3 feet of clearance on all sides of a dining table.
Reading those two sources together, a 12x16 can hold a dining set with little room to walk around it, while a 14x20 or 16x20 fits the table plus a path to the yard.
16x20, 20x20 and 20x30 decks: big decks for dining plus lounging
A 20x20 deck runs about $6,000 to $12,000 in pressure-treated and $10,000 to $20,000 in composite in Dallas before railing (calculated from Block Renovation's Dallas ranges), and a 20x30 is 1.5 times that. These are the sizes where you can have a dining zone, a grill zone and a lounge zone on one deck.
- 16x20 (320 sq ft): $4,800 to $9,600 pressure-treated or $8,000 to $16,000 composite in Dallas (calculated). Fixr's national 2023 band is $4,800 to $17,600. Holds 16 people at 20 sq ft each (our arithmetic).
- 20x20 (400 sq ft): $6,000 to $12,000 pressure-treated or $10,000 to $20,000 composite in Dallas (calculated). Fixr's national 2023 band is $6,000 to $22,000, and Advantage Lumber's 2026 national figures are $10,000, $16,000 or $24,000. Holds 20 people at 20 sq ft each (our arithmetic).
- 20x30 (600 sq ft): $9,000 to $18,000 pressure-treated or $15,000 to $30,000 composite in Dallas (calculated).
Railing grows with the deck. For a 16x20 deck with its 20-foot side on the house, the open edges total 52 linear feet, or about $1,560 to $2,600 in wood railing and $4,160 to $8,580 in composite. A 20x20 attached on one side has 60 linear feet: about $1,800 to $3,000 in wood or $4,800 to $9,900 in composite. Both are our calculations from Fixr's 2023 national railing rates, before subtracting a stair opening.
One designer's view is worth hearing before you go wide. Schuttner writes that anything over 16 feet wide feels too large for a residential deck, and he advises keeping the deck in scale with the house. That is his opinion, not a rule. A big deck can work well if it is broken into zones.
For context on bigger projects, Remodeling magazine's 2025 Cost vs Value report puts a Dallas wood deck addition at $15,841 (99.8% of cost recouped at resale) and a composite deck addition at $23,519 (92.1% recouped). The national figures are $18,263 and $25,096. By our calculation, Dallas runs about 13% below national for wood and about 6% below for composite. The 2025 report doesn't state a deck size, so don't treat those as a price for any specific size. If your deck is part of a larger backyard plan with a kitchen, cover or fire feature, see our guide to planning a full outdoor living space.
Pressure-treated, cedar or composite: how material changes the price at each size
Pressure-treated pine is the cheapest at every size, composite costs more up front, and cedar usually falls between the two when you compare figures from the same source. Fixr's 2023 national installed ranges are $15 to $25 per square foot for pressure-treated, $19 to $29 for cedar and $28 to $40 for composite. Block Renovation's 2026 national ranges are $15 to $30, $25 to $55 for cedar or redwood, and $30 to $60 for composite. The only Dallas cedar figure we found is HomeBlue's 2021 Dallas estimate of $26 to $29 per square foot installed, against $16 to $18 for pine and $30 to $32 for composite.
Lifespan changes the math over time. Block Renovation's 2026 guide puts pressure-treated at 10 to 15 years, cedar or redwood at 15 to 25, composite at 25 to 30 and PVC at 30 or more.
The gap between wood and composite on the total bill is smaller than the board prices suggest, because boards are only part of the job. TimberTech says that going from pressure-treated to composite adds as little as 15% to the total project cost, even though composite boards cost 20 to 40% more. That is a manufacturer's claim, so check it against your own quotes.
Color matters in Dallas sun. Trex says its decking gets hot in direct sun, that darker colors feel hotter, and it suggests lighter colors for hot climates. For a full comparison of heat, upkeep and lifespan, read how Trex, cedar and pressure-treated hold up in Dallas heat.
What raises the cost of a deck beyond its size? (height, stairs, railing, covers, demo, permits)
Height, a roof and tear-out all add to the price on top of size: height brings railing, stairs and heavier framing, a cover adds a roof structure, and demolition is billed on its own line. Block Renovation notes that elevated decks cost more because of framing and railing, and that they are less common on DFW's generally flat lots.
| Add-on | National range | Source |
|---|---|---|
| Railing | $20 to $50 per linear foot | Advantage Lumber, 2026 |
| Railing by type | Wood $30 to $50; metal $45 to $85; composite $80 to $165 per linear foot | Fixr, 2023 |
| Stairs | $150 to $300 per step | Advantage Lumber, 2026 |
| Stairs, labor included | $75 to $450 per stair | Fixr, 2023 |
| Elevated, steel or aluminum framing upgrades | $2 to $8 per sq ft | Advantage Lumber, 2026 |
| Raised deck | $25 to $50 per sq ft installed | Fixr, 2023 |
| Two-story deck | $30 to $60 per sq ft installed | Fixr, 2023 |
| Multi-level deck | $30 to $75 per sq ft installed | Fixr, 2023 |
| Covered deck | $40 to $100 per sq ft installed | Fixr, 2023 |
| Old deck removal | $500 to $2,000 | Advantage Lumber, 2026 |
| Demolition and removal | $5 to $15 per sq ft added | Fixr, 2023 |
| Deck permit | $150 to $800, plus inspection fees in some places | Block Renovation, 2026 |
| Permits and inspections | $200 to $1,500 | Advantage Lumber, 2026 |
A few notes on the table. In most places, railing is required only when the walking surface is more than 30 inches up, with openings small enough that a 4-inch sphere can't pass through, so many low Dallas decks skip it. Block Renovation also points out that widening stairs from 36 to 48 inches costs little. Stair prices are per step, so a taller deck costs more at the stairs as well as the rail.
Demolition is often priced separately. Block Renovation suggests asking whether your quote includes the dumpster. If you are weighing a rebuild against a fix, see what it costs to tear out an old deck or repair it.
A cover raises the per-foot price: Fixr's covered-deck range starts at $40 per square foot, where its raised-deck range starts at $25. For roof options and prices, see our Dallas patio cover cost guide.
How do you pick the right deck size? (furniture, grills and traffic paths)
Size the deck around what goes on it: tape out the table with the chairs pulled out, the grill with its clearance, and a clear walking path from the door to the yard.
| What goes on the deck | Space rule | Source |
|---|---|---|
| People, standing or mingling | About 20 sq ft per person, plus furniture, grills and planters | Fine Homebuilding |
| Social area | At least 12 ft in both directions | Fine Homebuilding |
| Special-use area | At least 8 ft | Fine Homebuilding |
| Ground-level path or stairs | At least 4 ft wide | Fine Homebuilding |
| Elevated walkway with railings | At least 6 ft wide | Fine Homebuilding |
| 4x6 dining table seating six | About 14 x 16 ft with walking room | AsktheBuilder |
| Dining table | 3 ft on all sides (chairs pushed in) | Houzz |
| High-traffic path | At least 3 ft, 4 ft preferred | Houzz |
| Grill | 4 ft between the front of the grill and other furniture | Houzz |
| Chaise lounge access | 24 in minimum, 36 in ideal | Houzz |
| In-ground pool edge | 5 ft walking area | Houzz |
Rough seating by size, using Fine Homebuilding's 20 square feet per person before furniture (our arithmetic): a 10x10 holds about 5 people, a 12x12 about 7, a 12x16 about 9, a 16x20 about 16 and a 20x20 about 20.
Plan the walking path first. AsktheBuilder's advice is to keep furniture out of the path between the house doors and the lawn. If the back door opens onto the deck, the route from that door to the stairs should be clear before you place a table.
Check your grill's manual for clearance. As one example, Weber's installation guide for its Summit S-460 and S-660 built-in gas grills says combustible materials should never be within 24 inches of the back or sides of the grill. Other grills have their own numbers, so look yours up before you size the grill corner.
A simple way to test a size: lay a garden hose or painter's tape on the lawn at the deck's outline, set your actual table and chairs inside it, and walk around them with a plate in your hand.
Does deck size change the permit in Dallas?
Yes. Size is one of the conditions that decides whether a Dallas deck needs a permit: small, low, freestanding decks can be exempt. The exact conditions are in our Dallas deck permit guide.
For a budget line, Block Renovation's 2026 national range for a deck permit is $150 to $800, plus per-inspection fees in some places. Advantage Lumber's 2026 national range for permits and inspections is $200 to $1,500. Your city sets the actual fee.
Your HOA can limit size too. Block Renovation notes that Dallas-area HOAs often require setbacks of 5 to 15 feet from rear and side property lines, and suggests asking the architectural review committee before you design the deck or collect bids. A setback can cap your deck's depth before price ever does.
Dallas heat and clay: size decisions that matter here
In Dallas, a big uncovered deck can be too hot to use on summer afternoons, so it is worth weighing a slightly smaller deck with shade against a bigger one without. Block Renovation says Dallas summers regularly exceed 100°F from June through September, with intense UV from May through September. The National Weather Service's Fort Worth office says that in July and August, DFW daytime highs are consistently in the 90s and often reach or exceed 100 degrees, and some nights stay above 80.
Shade changes how much of the deck you actually use. Block Renovation says a covered patio drops the temperature underneath by 15 to 25 degrees compared with an exposed surface. If your budget is fixed, one option is to build a smaller deck and spend the difference on a cover over the part where you sit. That is a choice to weigh, not a rule. Archetex builds covered decks and pavilions if you want to see what that looks like.
The ground matters more on a bigger deck. The Blackland Prairie runs from north of Dallas to just south of San Antonio, and its Houston Black clay (the Texas state soil) shrinks and swells as it dries and wets. The Soil Science Society of America notes its cracks can be more than 4 inches wide and 12 inches deep, and that construction on this soil is often plagued by cracking from the movement. A larger deck has more posts and footings sitting in that soil, so ask every builder how they plan the footings for your yard.
How to get comparable quotes for the size you want
Ask every builder to price the same size, height, board line, railing length, stair count and demolition, so the totals actually compare. Two quotes for the same size can be far apart simply because they are not pricing the same deck.
Before you collect bids, write down:
- The deck size and its height above the ground at the highest point.
- The board material and line (for example, which composite brand and collection, or which grade of pine or cedar).
- The railing: total linear feet and the material.
- The number of steps and the stair width.
- Whether old-deck removal and the dumpster are included.
- Whether the permit and inspections are in the price.
With those six lines fixed, a difference between quotes reflects framing, footings, labor and the builder's own approach, which is the part worth asking about. For what to ask beyond price, see how to compare deck quotes and builders.
If you want a Dallas builder to measure your yard and price a specific size, Archetex offers a free site visit and a written price. See our Dallas deck builder page for the kinds of decks we design and build.
