Decks · Service

Deck replacement, and the parts nobody can reuse

Tearing out a deck and building a new one is a different job from building on bare ground. We match you with vetted local builders and tell you honestly what carries over — which is usually less than the cheapest quote assumes.

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In short

What is deck replacement?

Deck replacement is the removal of an existing deck down to and usually including its frame, and the construction of a new one in its place. The thing that separates it from a new build is code drift: your old deck was built to the rules of its day, the replacement is judged against today's, and the parts most homeowners hope to keep — footings, posts, the ledger — are exactly the parts most likely to fail that test.

Triggers

Signs you need deck replacement

Boards flex noticeably underfoot in more than one place, not just at a single soft spot
The deck has visibly moved away from the house, opening a gap at the wall
Posts are soft at the base where they meet the ground or the footing
A repair estimate has come back at a large fraction of what a new deck would cost
The guard rail moves when you lean on it, and tightening the fasteners has not fixed it for long
You are replacing siding or windows on that elevation, and the deck is in the way of doing the wall properly
A home inspection during a sale flagged the structure and the buyer wants it resolved

Seeing something not on this list? Browse decks problems by symptom →

The job

How deck replacement actually works

Assessment of what is genuinely there

Before anything is quoted, a builder should get under the deck. What matters is the condition of the framing, whether the footings are where and what they should be, how the ledger was attached and flashed, and whether the whole thing was permitted in the first place. Old decks are frequently found to have been built without a permit at all.

Watch for: A quote produced without anyone going underneath. Everything that decides the price of a replacement is under the deck, not on top of it.
The reuse decision, made honestly

Homeowners hope to keep the footings and the frame. Occasionally the footings survive scrutiny. The frame rarely does, because it was sized under different rules, has spent decades wet, and was often built with fasteners and connectors that current practice does not accept. Keeping a frame that should not be kept is how a "replacement" ends up being replaced again.

Watch for: A quote that reuses the existing structure without anyone stating in writing what was inspected and what it was judged against. If the reuse case cannot be written down, it has not been made.
Permit — treated as new work

Replacement almost always needs its own permit, and the new deck is assessed against currently adopted code, not against what was allowed when the original was built. Nothing about the old deck having stood for thirty years grandfathers the new one.

Watch for: Being told the replacement does not need a permit "because there was already a deck there". That is not how it works in most jurisdictions, and it usually signals a builder who does not want their work inspected.
Demolition and disposal

The old deck comes apart, and the debris has to go somewhere. Older decking is frequently pressure-treated lumber, which has disposal rules — it cannot be burned and some facilities handle it differently from clean wood. Demolition also tends to expose things: siding damage behind the ledger, rot in the rim joist, sometimes rodent damage.

Watch for: Disposal quoted as a vague allowance. Ask whether it is a fixed sum or a pass-through, because volume is easy to underestimate and this is a common source of a surprise line at the end.
The wall, once it is finally visible

With the old deck gone you can see the band of wall it was covering — often for the first time in decades. This is the moment to deal with rot in the rim joist, missing or failed flashing, and damaged siding. It is far cheaper now than it will ever be again, because the wall will be covered up for another generation by tomorrow afternoon.

Watch for: A crew that wants to fix the new ledger straight onto whatever is there. If the wall behind the old deck is wet or soft, the new deck inherits the problem and hides the evidence.
Rebuild and inspection

New footings where the old ones do not qualify, new frame, new ledger with flashing, then the surface, guards and stairs. Inspections happen on the same schedule as any new deck, with the footing and framing stages checked before they are covered.

Watch for: Reusing old post bases or old connectors on new framing. Galvanised hardware has a life, and hardware that has been outdoors for thirty years has spent most of it.
Handover, with the permit closed

You should finish with the permit signed off, any manufacturer warranty registered for the new surface, and a written statement of what the builder warrants. If the original deck was unpermitted, the replacement is your chance to get a clean record on the property.

Watch for: An open permit left behind. Chasing a builder back for a final inspection two years later is much harder than insisting on it while they still want the last payment.

Money

What does deck replacement cost?

Replacement typically runs somewhat above a new build of the same size — commonly $10,000 to $35,000 — because demolition, disposal and repairs to the wall behind the old ledger come before a single new board is fitted. How much of the old structure genuinely qualifies for reuse moves it most.

See the full deck replacement cost guide — by material, size and region →

Deck sizing and planning tools → Useful for testing a bigger footprint before you commit to like-for-like.

Straight answer

When deck replacement is the wrong call

Everyone else ranking for this is paid when you say yes. Here's when you shouldn't.

The frame is genuinely sound and only the surface is worn. Then you want resurfacing, not replacement, and you should not pay to tear out framing that would have carried the new boards. The frame audit is what tells you which of the two you are buying.
One localised area has failed. A rotted stair stringer or a couple of soft boards is a repair. Replacing an entire deck because one component gave up is an expensive way to solve a small problem.
You are about to sell and the deck merely looks tired. Buyers price a safe deck and a shabby deck far closer together than the cost of replacing one. If it is safe, clean it. If it is not safe, that is a different conversation and disclosure applies.
You have not decided whether you want the same footprint. Replacement is the only cheap moment to change size, shape, stair position or level — everything is coming out anyway. Rebuilding the same outline out of habit wastes the one opportunity.
The deck is hiding an unresolved water problem against the house. Replace the deck and you re-cover the wall. Deal with the wall first, on its own terms, or you are buying a new lid for the same problem.
Nobody will quote it with a permit. An unpermitted replacement of an unpermitted deck compounds the problem on your property record, and it removes the only independent structural check in the process.

Your options

Types of deck replacement

Repair versus replace

The head-to-head that decides this whole page, worked through on its own terms rather than as a sales pitch.

Change the material while you are at it

Replacement is when the surface decision reopens with no switching cost. The material guides cover how each behaves over its life, not just on day one.

Change the footprint while you are at it

Different layouts, and what each does to the framing and stair arrangement, before you commit to rebuilding the same shape.

Full teardown to footings

The default outcome of an honest assessment on most decks over about a generation old. Everything is new and everything is inspected.

Partial — new frame on retained footings

Possible where footings are documented, correctly sized for current requirements and undamaged. Rarer than homeowners hope, and it needs to be established in writing.

Compare decks options side by side →

Before you sign

What to check when hiring for deck replacement

Have you been underneath, and what did you find?

The whole price of a replacement is decided under the deck. A quote written from the surface is a guess with a number on it.
What are you reusing, and what did you check before deciding that?

Reuse needs a stated basis. "The footings looked fine" is not one; "we exposed three, they are the right diameter and depth for the current requirement" is.
Is demolition and disposal a fixed price or a pass-through?

Volume is routinely underestimated, and treated lumber has its own disposal handling. This is the classic surprise line on a replacement invoice.
What happens if the rim joist behind the ledger turns out to be rotten?

It is common enough that it should have an agreed process and a rate, not be discovered as an argument on a Thursday.
Will the new deck be assessed against current code, and are you pulling the permit?

It will be, and they should be. A builder who thinks the old deck grandfathers the new one has misunderstood the job.
Can I change the size or shape without a large uplift?

Now is the only time it is nearly free. Ask before you approve a like-for-like rebuild you did not actually want.
How do you protect the garden, the siding and the route to the street?

Demolition is destructive and the debris path goes across whatever is between the deck and the skip. Agree it up front.

All decks hiring checklists →

Local pros

Deck Replacement near you

Local pro matching for deck replacement is rolling out by metro. Enter your ZIP and we'll match you with vetted pros in your area today.

Related work

Often done at the same time

Deck Resurfacing

When the frame really is sound

Deck Repair

When it is one failed component

Deck Installation

Building on bare ground

Deck Inspection

Settle the question before you spend

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FAQ

Deck Replacement — questions people ask

Still have a question? Talk to our team →

Can I keep the existing frame and just replace the boards?

Only if the frame passes an actual inspection, and on older decks it often does not. The frame was sized to the rules of its era, has been wet for decades, and may use connectors and fasteners that current practice does not accept. If a builder proposes keeping it, ask what they exposed and what they judged it against. Where the frame genuinely is sound, what you want is deck resurfacing rather than replacement — a different, cheaper job.

Does a replacement deck need a new permit?

In most jurisdictions yes, and it is assessed against currently adopted code rather than the code the original was built under. The fact a deck has stood in that spot for thirty years does not grandfather its replacement. This catches people out, because the new deck sometimes has to be built noticeably differently from the one it replaces — different guard arrangement, different stair geometry, different footings.

What usually gets found once the old deck comes off?

The band of wall behind the ledger, which nobody has seen since the original build. Missing or failed flashing is common, and where flashing was absent the rim joist behind it is often soft. Siding damage and pest activity turn up too. None of it is unusual, but it is much cheaper to deal with in the two days the wall is open than at any other point in the building's life.

How is the old deck disposed of?

It is hauled away, and the treated lumber component has handling rules — it should not be burned, and some facilities take it separately from clean construction wood. Ask whether disposal is a fixed line or a pass-through on your quote, because the volume coming off even a modest deck surprises people and this is where end-of-job invoices tend to grow.

Can I make the deck bigger during a replacement?

This is the best moment to, and often the only cheap one. The framing is being rebuilt regardless, so the marginal cost of extra area is materials and a few more footings rather than a whole new project. It may change your setback or coverage position with the local authority and with an HOA, so raise it before the drawings go in rather than after.

How long will we be without the deck?

Demolition is fast — often a day. The rebuild runs like any deck build, and the calendar is usually set by permit review and by the gaps waiting for footing and framing inspections rather than by the carpentry. Ask for a schedule that shows those waiting periods explicitly, because a "one week build" can sit inside a six week project.