Decks · Decision Guides

Deck decision guides

A deck is worth building if you will use it, not if you expect it to pay for itself — wood deck additions recoup about 65.8% of cost and composite about 63%. Repair beats replacement until repair cost approaches new-deck cost, the deck passes about 20 years old, or beams and joists need replacing.

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Is a deck worth it? Financially, no project that returns roughly two-thirds of its cost is an investment. It is a purchase with a partial rebate. That is fine — most home improvements are — but it should change how you budget. Build the deck you'll use at $9,000 to $20,000 rather than the deck that impresses at $40,000.

Repair or replace? For a 300 square foot deck, repair is $500 to $3,000 and replacement $6,000 to $18,600. Replace when repair approaches replacement cost, when the deck is over 20 years old, or when structural members need replacing. Do not replace because the boards look tired — resurfacing over sound framing is much cheaper.

DIY or hire? Labor at $10 to $35 per square foot is a lot of money to save, and a simple ground-level platform deck is genuinely within reach for a capable DIYer. The parts that are not: ledger attachment to an unknown floor system, guard post hold-downs, and footings near the house foundation, which must bear at the same elevation as the house footing when within 5 feet of it. If your deck involves any of those, hire.

Budget or premium? The place to spend is the frame and the connections. The place to economize is the finish level — lighting, skirting, benches, and railing upgrades that run $80 to $210 per linear foot. You can add those later. You cannot add footings later.

How to choose

Decide on use, budget on rebate: Assume roughly 63% to 65.8% of the cost comes back at resale, and pick a number you'd be happy spending regardless.
Get a framing assessment before choosing repair vs replace: The decision is entirely about the joists, beams and ledger. Boards are a distraction.
DIY the platform deck, hire the attached one: Ground-level freestanding decks avoid the ledger question. Anything bolted to the house or over 30 inches up raises the stakes considerably.
Spend on frame, defer on finish: Cable and glass railings at $115 to $210 per linear foot can be added later. Undersized joists cannot be fixed later without tearing the deck apart.
Say no to the outdoor kitchen at bid stage: That's how a $14,000 average project becomes a $40,000 one. Add it in a later phase if you still want it.

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FAQ

Decks decision guides — common questions

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Is building a deck a good investment?

Not in the strict sense — recouped cost is about 65.8% for wood and 63% for composite. It's a lifestyle purchase with meaningful resale support, not a money-maker.

When is it cheaper to replace a deck than repair it?

When repair approaches new-deck cost. For a 300 square foot deck that's repair at $500 to $3,000 against replacement at $6,000 to $18,600, plus the age and structural tests.

Should I hire a professional deck builder?

Yes if the deck attaches to the house, sits more than 30 inches above grade, or has footings within 5 feet of the house foundation. Those are the details that fail.

What's the minimum I should spend?

There's no honest minimum, but a 100 square foot pressure-treated deck can come in around $1,500. Cutting below realistic pricing usually means cutting the frame.

Sources

Where these figures come from

Fixr — Cost to Build a Deck · retrieved 2026-07-26
Fixr — Deck Repair Cost · retrieved 2026-07-26
American Wood Council — DCA 6 Prescriptive Residential Wood Deck Construction Guide · retrieved 2026-07-26