How Long Does It Take to Build a Deck in Sydney?
By 5 Star Decking · 9 min read · May 2026 · NSW Builder’s Licence 395250C
The short answer is 5 to 7 working days on site for a standard deck. But that’s only part of what you’re actually asking. The question most Sydney homeowners really want answered is: from the day I decide to go ahead, how long until I’m standing on a finished deck?
That’s a different question — and one most builders won’t give you a straight answer on. After 15+ years and hundreds of decks across Sydney’s Eastern Suburbs, Northern Suburbs, and Inner West, here’s the honest breakdown.
The On-Site Build Time — What’s Actually Realistic
A standard single-level deck — 25 to 45m², composite or hardwood, flat or gently sloped block, no major site complications — takes our crew 5 to 7 working days on site. Here’s how those days break down:
Composite Deck — 30m²
- Day 1 — Demo of any existing structure, site prep, materials on site, layout marked out
- Days 2–3 — Footings poured and cured, bearers and joists framed up
- Days 4–5 — Composite boards installed, trimmed, fixings finished
- Day 5–6 — Balustrade installed, site cleaned, handover
Hardwood Timber Deck — Same 30m²
- Add 2–3 days — Every hardwood board needs pre-drilling, face-screwing or secret-fixing, plugging and oiling. Same frame, more hands-on finishing.
- Spotted Gum and Blackbutt typically run 8–10 working days for the same footprint as a 5-day composite build.
The difference isn’t the frame — that’s the same regardless of board type. It’s the finishing detail that hardwood demands. If you love the look of real timber (and many of our clients do), factor in the extra time and plan accordingly.
What Actually Adds Time (And What Doesn’t)
Most vague answers online (“two to four weeks”) are averages across every deck ever built. Here’s what specifically changes a timeline on a Sydney build:
⏱ Adds real time
- Stairs — Even one short flight adds a full day. Stringers, treads, handrail — the detail work adds up fast.
- Elevated builds — Deep footings on sloped Sydney blocks take longer to dig, pour, and cure. Add 1–2 days minimum.
- Glass balustrades — Frameless glass is the slowest balustrade to install. Cable comes next. Timber pickets are quickest.
- Pool decking — Drainage fall, slip-rated boards, pool fence compliance and certification all add scope.
- Council DA required — If your build needs a DA (over 1m, heritage zone, large footprint), that process runs weeks before we’re even on site. We manage this — but you need to know it exists.
- Pergola or roofed structure — Essentially a second build scope on top of the deck. Allow a separate timeline.
✅ Doesn’t add as much as people think
- Going from 30m² to 50m² — Adds a day or two, not a full week. Framing scales more efficiently than most people expect.
- Upgrading to a premium board — Millboard vs ModWood vs Evalast? The cost goes up, the install time barely changes.
- Changing the board colour or direction — This is a design decision, not a time decision. Lock it in before we start and it costs nothing extra.
- Adding a fascia board — Half a day’s work at most. Worth doing — it finishes the frame edge cleanly.
The Two Honest Causes of Blow-outs
Every builder blames rain and council. Those are real factors. But after hundreds of Sydney builds, here are the two causes that actually blow timelines most often:
1. Rain — Less Than You’d Expect, More Than You’d Like
Sydney’s east gets hit hardest — ask anyone who’s built in Coogee or Maroubra in March. Steady drizzle? We work through it. Proper rain — the kind where boards are slick, concrete won’t cure, and running a saw on a wet frame is a safety issue — that stops a deck build.
On a typical Sydney week we might lose half a day to weather. A wet week, two days. A genuine disaster week, the whole job slides by a week. We build weather buffers into every schedule and keep clients updated in real time — no radio silence while you wonder what’s happening.
2. Late Material Decisions
This is the one nobody talks about — and it’s the biggest cause of delays we see. A client who hasn’t finalised their board colour, balustrade style, or stair direction before we’re on site creates a ripple effect that’s hard to recover from.
Composite boards are typically ordered 2–3 weeks ahead from our suppliers. If you change your mind on colour after materials are ordered, we either wait for a new delivery or work around it. Neither is ideal. The fix is simple: lock in every material decision before you sign off on the quote. We bring samples to every site visit — board colours, balustrade options, fascia finishes — specifically so this doesn’t happen to our clients.
💡 5 Star Decking tip: We send every client a simple pre-start checklist — board colour confirmed, balustrade style confirmed, stair direction confirmed. Takes 10 minutes. Saves days on site.
The Full Timeline — Enquiry to Walking on Your Deck
When clients ask how long a deck takes, they usually mean the days on site. The more useful question is: from today, how long until I’m done? That answer has three phases.
📋 Phase 1 — Quote (3–5 days)
We do free on-site measures Monday to Saturday. Most quotes are back within 48–72 hours of the site visit — not the two-week ghost act you might have experienced with other builders. For standard jobs with common materials, we can quote same week.
📅 Phase 2 — Booking slot (1–3 weeks)
Unlike sole traders running one job at a time, we run multiple crews across Sydney simultaneously. That means shorter wait times. Once your deposit is paid, your start date is locked. We don’t take verbal commitments — paid deposit, confirmed slot. Simple.
Typical wait from deposit to start: 1–3 weeks. During our busy season (Sep–Feb) this can push to 4 weeks. We’ll always tell you the honest wait before you commit.
🔨 Phase 3 — On-site build (5–10 days)
Standard composite: 5–7 days. Hardwood: 8–10 days. Add time for stairs, elevated builds, glass balustrade, or DA-required work. We attach a build schedule to every fixed-price quote — start date, key milestones, expected handover day — so you know exactly what to expect before signing anything.
Total realistic timeline: 3–6 weeks from first call to finished deck.
Sydney-Specific Factors That Change Everything
Sydney isn’t one building environment — it’s fifteen. The Eastern Suburbs, Northern Suburbs, and Inner West all throw different challenges at a deck build:
- Coastal suburbs (Coogee, Maroubra, Bondi, Manly) — Salt air requires marine-grade stainless fixings and specific timber species. No shortcuts. We factor the extra material spec into every coastal quote.
- Sloped Eastern Suburbs blocks — Elevated builds on steep sites need deeper footings, more complex framing, and sometimes engineering sign-off. Add 1–3 days for a significantly elevated build.
- Heritage zones (Paddington, Balmain, Newtown, Randwick) — If your property is heritage-listed or in a conservation area, a DA is almost certainly required. This runs 4–8 weeks through council before we break ground. We manage the process and can start the DA while you finalise your design decisions.
- Apartment balconies — Strata approval adds a separate approval phase. Allow 2–4 weeks for strata committee sign-off before works begin.
- Concrete slab or existing structure — Ripping out an existing deck or building off a concrete slab changes the footing approach entirely. Usually faster on a slab, slower if demo of existing structure is involved.
Questions to Ask Any Sydney Deck Builder About Their Timeline
If you’re getting multiple quotes (you should be), here’s what to listen for when timeline comes up:
- “When can you start?” — A vague “in a few weeks” is a red flag. You want a specific start date tied to your deposit.
- “What’s included in that timeline?” — Does it include balustrade? Stairs? Fascia? Get the scope in writing before you compare quotes.
- “Do you use subbies?” — If yes, their schedule isn’t fully theirs to control. Subbies get pulled to other jobs. Delays follow. Our carpenters are our own.
- “What happens if it rains?” — Any builder who says rain won’t affect them is lying. Ask how they communicate delays and what the process is for rescheduling.
- “Does your quote include a build schedule?” — It should. If a builder can’t give you milestones before you sign, don’t sign.
Where 5 Star Decking Sits on Timeline
We’re not a one-man band — we run multiple licensed crews across Sydney simultaneously, which means shorter wait times than sole traders and the ability to staff up when a project is more complex. NSW Builder’s Licence 395250C. 15+ years building across the Eastern Suburbs, North Shore, and Inner West.
- Free on-site measure — we come to you, usually within the week
- Quote back within 48–72 hours of site visit
- Fixed-price quote with a build schedule attached
- Start date locked on deposit — no verbal commitments that get bumped
- Dedicated site supervisor on every job — you always know who to call
- 2-year workmanship guarantee on every build
For most Eastern Suburbs projects, from your first call to walking on a finished deck is 3–5 weeks. DA-required builds or complex elevated structures add time — but we’ll be upfront about that from the first site visit, not halfway through the process.
Ready to Get a Timeline for Your Deck?
The best way to get an accurate timeline is a free on-site measure. We assess the block, the access, the scope — and give you a fixed-price quote with a realistic start date and build schedule attached. No guesswork, no vague estimates.
Further reading: How much does a deck cost in Sydney? · Composite vs timber decking — which is right for you? · Deck builders Eastern Suburbs
