Key takeaways
- Sand + re-oil of ~30 m2 timber deck: $1,400-$3,200 in Adelaide (2026)
- Restoration with 30 percent board replacement: $4,500-$8,500
- Restoration is typically 15-30 percent of the cost of a full rebuild
- A sound frame means restore; a failed frame means rebuild - an inspection decides
See the full price table, try the deck cost calculator, or compare 3 itemised quotes.
Deck Restoration Cost: the 2026 price table
Structured Adelaide pricing - the data no SERP competitor publishes.
| Deck type | Indicative range |
|---|---|
| Sand + oil only (~30 m2 timber, sound deck)Sand back the grey layer, re-oil. No board replacement. | $1,400-$3,200 |
| Spot board repair + full re-oilReplace a handful of damaged boards, then re-oil the whole deck. | $900-$2,400 |
| Restoration + 30% board replacement (~30 m2)Sand, replace around a third of the boards, repair fixings, re-oil. | $4,500-$8,500 |
| Full timber deck rebuild (for comparison, ~30 m2)What you avoid when the frame is still sound. | $15,000-$25,000+ |
Indicative metro Adelaide ranges for 2026. GST inclusive. Deck size, board condition and access drive the figure.
What restoration costs against a rebuild
A sand-and-oil of a structurally sound 30 square metre timber deck costs $1,400 to $3,200. If around a third of the boards also need replacing, that rises to $4,500 to $8,500. Compare that to a full rebuild of the same deck at $15,000 to $25,000 or more, and the value of restoration is obvious - it is typically 15 to 30 percent of a rebuild.
The catch is the single word 'sound'. Restoration only makes sense when the structure underneath is still good. A board surface can always be renewed; a failed frame cannot be oiled back to life.
The structural test that decides the cost
Before any restoration quote means anything, the deck needs an honest structural check. Walk it and feel for spring, sponginess or movement. Look underneath for soft joists you can push a screwdriver into, rusted bearer fixings, and rot where the frame meets the ground. If the frame is solid, restoration is the right answer and the numbers above apply. If the frame has failed, no amount of sanding and oiling fixes it - a rebuild is the honest call.
This is why a builder should inspect before quoting, not after. A quote that is just 'we will give it a coat of oil', sight unseen, over a grey deck is a cosmetic patch that fails within months because the oil cannot bond to an unsanded, weathered surface.
Decking Adelaide gets you 3 builders who inspect the deck, give you a straight read on whether it is worth saving, and quote the restoration itemised - sanding, board replacement, fixing repairs and finish as separate lines.
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Deck Restoration Cost - frequently asked questions
A sand-and-oil of a structurally sound 30 square metre timber deck costs $1,400 to $3,200 in metro Adelaide for 2026. If around 30 percent of the boards also need replacing, expect $4,500 to $8,500. The price depends on deck size, board condition and access, so a pre-quote inspection sets the real scope.
Far cheaper to restore - when the frame is sound. Restoration is typically 15 to 30 percent of the cost of a full rebuild. A sound frame can carry new boards and a fresh finish. The deciding factor is the structure: if the frame has rotted or failed, restoration cannot fix it and a rebuild becomes the honest answer.
Oil cannot bond to a dirty, weathered, grey surface. A deck that has lost its coating has a degraded top layer of timber, and fresh oil applied over it sits loose and fails within months. Sanding back to clean, sound timber is what lets the new oil penetrate and last. A quote that skips sanding is a cosmetic patch.
Check the structure, not the surface. Walk the deck for spring or movement, and look underneath for soft joists, rusted bearer fixings and rot where timber meets the ground. A grey, splintered surface is restorable; widespread structural failure is not. A builder's inspection confirms which side of that line your deck sits on before you spend on restoration.
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