Calculate total deck construction costs comparing pressure-treated wood, cedar, and Trex composite decking. Includes footings, railings, stairs, and permits.
Extending post footing 6" below frost depth eliminates catastrophic winter frost heave.
Estimated PT WOOD Deck Cost
Contractor Price Range
$9,423 – $12,040 ($33.65 – $43.00/sq ft, inc. stairs & railings)
| Item / Material Spec | Quantity | Unit / Package | Installation Notes |
|---|---|---|---|
| Deck Framing & Surface Decking (PT WOOD) | 280 | Sq Ft | Structural joists, footings, and decking boards |
| Code-Compliant Guardrail System | 48 | Linear Feet | 36" height railings with balusters spaced < 4" |
| Stair Flight Stringers & Treads | 4 | Steps | Includes graspable handrail |
Cost of raw lumber, concrete, shingles, wire, or stone without equipment rentals or labor.
Full installation: permits, site prep, skilled trade labor, equipment, and structural warranty.
Average trade labor savings if executed as a skilled DIY homeowner project.
Skip the heavy equipment rentals, structural liabilities, and municipal permit delays. Connect directly with pre-screened, licensed, and insured trade specialists in National Average.
Standard commercial specifications and pre-calculated project benchmarks.
| Deck Footprint | Square Footage | PT Wood (Turnkey) | Cedar (Turnkey) | Trex Composite (Turnkey) |
|---|---|---|---|---|
| 12 × 12 ft | 144 sq ft | $4,600 – $6,800 | $5,900 – $8,600 | $7,800 – $11,500 |
| 16 × 12 ft | 192 sq ft | $6,100 – $8,900 | $7,800 – $11,400 | $10,400 – $15,200 |
| 20 × 14 ft (Standard) | 280 sq ft | $8,900 – $12,900 | $11,400 – $16,500 | $15,200 – $22,200 |
| 24 × 16 ft (Large) | 384 sq ft | $12,200 – $17,800 | $15,600 – $22,800 | $20,800 – $30,500 |
Decks more than 30 inches above grade require continuous guardrails minimum 36 inches in height. Baluster spacing must not allow passage of a 4-inch diameter sphere. Guardrail posts must resist a 200-pound concentrated outward load at the top rail.
A standard 20x14 foot (280 sq ft) deck costs $8,500 to $13,000 turnkey using pressure-treated wood, $11,000 to $16,500 using western red cedar, and $15,000 to $22,000 using capped composite (Trex or TimberTech).
Yes for long-term value. While composite costs roughly 50% to 75% more upfront than pressure-treated wood, it never requires pressure-washing, sanding, staining, or sealing every 2 years. Composite boards carry 25-to-50-year fade and stain warranties and do not splinter.
Yes. Almost all municipalities require a building permit for any deck attached to the house, or any freestanding deck with a walking surface more than 30 inches above the surrounding ground level.
A well-maintained pressure-treated lumber deck lasts 15 to 20 years. Untreated or neglected wood decks degrade within 8 to 12 years from rot and sun checking. Composite decks typically last 25 to 35+ years.
Adheres to certified architectural formulas and standard International Residential Code (IRC 2024) Section R507 commercial trade provisions.
Accurate material takeoff requires reconciling nominal plan dimensions with real-world physical packaging and volumetric compaction. This engine evaluates Deck Length (Along House), Deck Width (Projection), Surface & Railing Material, Deck Elevation Level, Stair Flight Steps against certified engineering multipliers.
\text{Total Cost} = (\text{Area} \times \text{Material Rate}) + (\text{Railing LinFt} \times \text{Railing Rate}) + (\text{Steps} \times \$140) + \text{Permit}Equation Reference: AWC DCA 6 Deck Building Unit Rate Model. Calculated results provide both theoretical net volume and practical jobsite gross totals factoring standard shrinkage and trim cuts.
Measure length, width, depth, or gauge with calibrated trade tools. Confirm grade level and structural subbase.
Factor a 5% to 15% allowance depending on job complexity to prevent costly project shutdowns from mid-job shortages.
Round up to whole commercial packaging units (bags, rolls, panels) and compare raw material cost against regional trade rates.
Building departments across the United States reference municipal standard codes (including the International Residential Code IRC, National Electrical Code NFPA 70, American Concrete Institute ACI, and ASTM international specs). Designing below these minimum safety thresholds risks structural deflection, inspection failure, and permit revocation.
Complementary trade calculators for synchronized project estimation.
Calculate total fence installation costs including cedar wood, vinyl privacy, chain link, and aluminum ornamental fencing with gates and post concrete.
Calculate how deep to dig fence post holes based on fence height, local frost line depth, soil type, and required concrete bags per hole.
Calculate how many fence pickets, horizontal rails, and posts you need based on fence length, picket width, and desired spacing gap.