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What drives deck costs beyond the surface area
The visible decking surface is only part of the cost. Footings, structural framing, ledger attachment to the house, railings, stairs, and permits can easily match or exceed the material cost of the deck surface itself.
Composite vs. wood — the real tradeoff
Pressure-treated wood is cheaper upfront but requires annual sealing and periodic replacement of boards. Composite decking costs 30–60% more to install but is essentially maintenance-free for 25+ years. For homeowners who plan to stay, composite typically has a lower total cost of ownership. For homeowners who may sell soon, the premium may not be fully recovered at resale.
The ledger connection matters
How the deck attaches to the house is a structural and waterproofing critical point. Improper ledger connections are the leading cause of deck failures and are a focus of building inspections. This is not a place to cut corners — proper flashing, hardware, and fasteners are essential.
Permit reality for decks
Almost all jurisdictions require permits for attached decks. Some allow small freestanding platforms without a permit, but thresholds vary (commonly under 200 sq ft and under 30 inches above grade). Building without a required permit creates issues at resale and may void homeowners insurance.