Deck Restoration Cost in Sydney: Sand & Oil vs Rebuild
The Third Rule
Here's the number that matters: restoring a structurally sound timber deck typically costs around 30–40% of rebuilding it. Same boards, same layout — sanded back to bare timber, then stained and sealed to a rich, even finish.
That grey, splintery deck you're embarrassed about? If the structure underneath is healthy, it's probably a restoration job, not a demolition job. The difference is thousands of dollars.
What Restoration Costs in Sydney
Indicative Sydney pricing for a professional restoration (sand back + stain/oil):
| Deck size | Restoration cost | Equivalent rebuild (merbau) |
|---|---|---|
| 15m² | $950 – $1,300 | $2,700 – $3,750 |
| 20m² | $1,250 – $1,750 | $3,600 – $5,000 |
| 30m² | $1,900 – $2,600 | $5,400 – $7,500 |
| 40m² | $2,500 – $3,500 | $7,200 – $10,000 |
Add-ons that move the price: replacing scattered damaged boards (each board is cheap; matching aged timber takes skill), re-nailing or screwing down movement, balustrade sanding (fiddly, often quoted separately), and multi-level or pool-surround access.
Run your own numbers — the deck cost calculator has a restoration mode built in.
What a Professional Restoration Involves
1. Inspection — the crawl-under check that decides everything (see below)
2. Repairs — replace cracked boards, punch and refill proud fasteners
3. Sanding — drum/orbital sanding back to bare, bright timber
4. Cleaning — removing dust and any mould or tannin staining
5. Coating — two coats of penetrating decking oil or stain, colour of your choice
A 20–30m² deck is usually a 1–2 day job for a pro crew. DIY is possible, but hire-sander mishaps that gouge boards are the classic way to turn a restoration into a partial rebuild.
Restore or Rebuild? The Honest Checklist
Restoration territory:
Rebuild territory:
The subframe is the whole ballgame. New boards on rotten joists is money burned; conversely, tired boards on a healthy frame is exactly what restoration is for. If only the boards are gone, a re-deck (new boards on the existing frame) sits between the two at roughly 60–70% of a full rebuild.
How Long a Restoration Lasts
A quality sand-and-oil buys you the deck's good looks back, but the clock restarts on maintenance: expect to re-oil every 12–18 months (every 9–12 months in exposed coastal spots). Each re-oil is cheap; it's skipping five years of them that leads back to the full restoration.
See It Before You Book It
Restoration is the rare renovation you can preview honestly: same deck, same boards — just refreshed. Upload a photo of your weathered deck to the free AI visualizer, choose the restoration option, and you'll see your own boards sanded and oiled rather than a stranger's stock photo. If the render sells you, request quotes from vetted local builders in the same flow.
Frequently Asked Questions
Frequently Asked Questions
How much does it cost to sand and oil a deck in Sydney?
Professional sanding and re-oiling typically runs $60–$90 per square metre in Sydney — about $1,250–$1,750 for a standard 20m² deck. That's roughly a third of what rebuilding the same deck in merbau would cost.
How do I know if my deck can be restored instead of rebuilt?
Check the structure, not the surface. If the joists and bearers underneath are firm (a screwdriver shouldn't sink in), and the boards are weathered but solid underfoot, it's usually restorable. Soft spots, rot or termite damage in the subframe mean rebuild territory.
How often should a restored deck be re-oiled?
Every 12–18 months for most Sydney decks, or every 9–12 months in exposed coastal positions. Regular re-oiling is cheap insurance — it's skipping it for years that sends a deck back to full restoration.
Is it worth restoring an old merbau deck?
Almost always, if the structure is sound. Merbau is a Class 1 durability hardwood that sands back beautifully — decks 15–20 years old routinely come up looking near-new after a professional sand and oil at a fraction of replacement cost.
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