Quick Answer: What Does a Deck Cost in Sydney?
If you have been Googling deck prices in Sydney, you have probably found vague answers like $200-$1,000 per square metre. That is technically correct but completely useless without context.
This guide gives you real 2026 pricing based on what we actually quote and build across Sydney – from Sutherland Shire to the Northern Beaches, Inner West to the Hills District.
| Deck Size | Estimated Cost |
|---|---|
| Small (12-20 m2) | $6,000 – $12,000 |
| Medium (20-40 m2) | $12,000 – $22,000 |
| Large (40-60 m2) | $22,000 – $35,000+ |
| Elevated / multi-level | Add $3,000 – $10,000 |
What Drives the Cost of a Deck in Sydney?
1. Material Choice
This is the biggest single factor. Here is how the main materials compare in 2026:
Merbau Hardwood Timber – $450-$650/m2
Sydney’s most popular decking timber for 20+ years. Rich red-brown tones, naturally durable. Requires oiling every 1-2 years.
Blackbutt and Spotted Gum – $480-$700/m2
Premium Australian hardwoods, excellent for coastal properties. More stable than Merbau in high-UV conditions.
Composite Decking (Evalast, Modwood, Futurewood) – $520-$850/m2
Higher upfront cost, near-zero maintenance. No oiling, no splinters, no warping. 25-year product warranties available. Ideal for pools, coastal, and north-facing decks.
Treated Pine – $280-$420/m2
Most affordable option. Requires regular treatment and maintenance. Best for covered or low-traffic areas.
2. Size and Shape
A simple square or rectangular deck is the most cost-effective. Every angle, corner, step, or curved edge adds time and material waste. A basic 4m x 5m Merbau deck will cost significantly less per square metre than a complex L-shaped deck of the same area.
3. Ground Level vs Elevated
A ground-level deck (under 600mm high) is the most affordable. Once your deck exceeds 600mm above ground, you will need engineered posts and bearers, balustrades (required by NSW law above 1m), and potentially a Development Application. Elevated decks typically add $3,000-$8,000 to the base price.
4. Balustrades
If your deck is above 1 metre from the ground, balustrades are legally required in NSW.
| Balustrade Type | Cost per Linear Metre |
|---|---|
| Timber | $180 – $280 |
| Aluminium (powder coated) | $250 – $380 |
| Glass (frameless) | $450 – $700 |
| Cable wire | $300 – $450 |
5. Access and Site Conditions
Sydney’s topography means sloped blocks, tight side access, and awkward spaces are common. Properties in suburbs like Cremorne, Mosman, Balmoral, or Avalon often have narrow gates or steep paths that require manual material handling.
6. Subframe and Footings
The subframe needs to be correctly engineered for local soil conditions. Some Sydney suburbs have reactive clay soils requiring deeper footings. Coastal suburbs may require stainless steel fixings rated for salt air.
How Much Does a Deck Cost by Sydney Suburb?
Northern Beaches (Manly, Dee Why, Newport, Avalon)
Elevated decks on sloped blocks, coastal-rated materials required. Typical spend: $15,000 – $30,000 for a standard 30 m2 composite deck.
Eastern Suburbs (Bondi, Coogee, Randwick, Maroubra)
Strata approval often required. Typical spend: $12,000 – $25,000.
Inner West (Newtown, Leichhardt, Balmain, Marrickville)
Compact decks on terrace houses. Typical spend: $7,000 – $16,000.
Sutherland Shire (Cronulla, Miranda, Engadine, Caringbah)
Great access, larger blocks, strong demand for pool-adjacent composite decks. Typical spend: $14,000 – $28,000.
Hills District and Parramatta (Castle Hill, Baulkham Hills, Epping)
Large blocks, double-storey homes, elevated decks common. Typical spend: $16,000 – $35,000.
Do You Need Council Approval for a Deck in Sydney?
In most cases, decks in NSW can be built under Complying Development (CDC) – no DA required, faster approval, lower cost. Key thresholds: must not exceed 1m above ground, total area under 25 m2, set back from boundaries, and not in a heritage overlay or flood zone.
Properties in heritage conservation areas (common in the Inner West, Lower North Shore, and Eastern Suburbs) require a DA regardless of size. We handle the paperwork and CDC certification as part of our service.
What is Included in a 5 Star Decking Quote?
- Full supply and installation
- All structural timber (posts, bearers, joists)
- Decking boards in your chosen material
- Hidden fixing systems where applicable
- Standard fascia and trim
- Waste removal and site clean-up
- NSW Builder’s Licence 395250C
- Written 12-month workmanship warranty
- Product warranty up to 25 years for composite
How to Get the Best Value on Your Sydney Deck
- Choose the right material – if you hate maintenance, pay the extra for composite.
- Keep the shape simple – a rectangle is always more cost-effective.
- Get 3 quotes – compare the same material grade, subframe spec, and warranty.
- Check the licence – in NSW any deck work over $5,000 requires a licensed contractor. Our licence is 395250C.
- Book off-peak – our busiest period is September to March. Book autumn or winter for faster lead times.
Ready to Get a Real Price for Your Sydney Deck?
We build decks across Greater Sydney – from Sutherland Shire to the Northern Beaches, Eastern Suburbs to the Hills District. All quotes are free and no obligation.
Call us on 0433 334 415 or get a free quote online.
NSW Builder’s Licence: 395250C | Serving Sydney and Surrounds
