Licensed and insured, on the Central Coast since 2011
Central Coast
Hardwood, treated pine and composite decks, ground-level and elevated, balustrades and decks with a pergola or roof, across the Central Coast.
Lic. NSW Fair Trading 000000C · Public liability to $20M
Our response promise
A written quote within one business day, and we answer the phone.
We turn up when we say we will, and we never leave an enquiry sitting. Most quotes go out the same week we measure.
Why homeowners pick us
You cannot get a price without booking a design consult
Every deck builder makes you wait for a "free design consultation" before you learn a single number. Decking is one of the most estimable trades there is: it is area in m², by board, by height. So we put an honest by-the-m² range on the screen first. Then we measure and pin the exact figure on site.
Nobody tells you what is under the boards
A lump-sum "$X for the deck" goes quiet on the substructure: the footing depth, the joist spacing, the posts and the ledger flashing where the deck meets the house. It goes vague on the balustrade and on whether you need council approval. We name all of it on the quote, so nothing is hidden and nothing blows out later.
The cheap deck bounces and rots in two summers
A low number usually means joists spread out to save on timber, pads sat on the dirt instead of concreted footings, and a board that is "hardwood" with no grade named. The substructure is the part that fails first, and the part a cheap quote quietly skimps. We build the frame to suit the board and the height, name the board on the quote, and warrant the footings, bearers and posts for 10 years.
Hardwood, treated pine and composite, ground-level and elevated, balustrades, and decks with a pergola or roof. Each one quoted the same honest way: the area in m², the board and grade named, the substructure built to last, the whole thing in writing.
Merbau, spotted gum and blackbutt decks, fixed to a substructure built to last, with the board and grade named on the quote.
Get a quote →The budget-friendly deck done properly: H3 or H4 treated pine on concreted footings and correctly spaced joists, not a frame that sags in two summers.
Get a quote →Low and ground-hugging decks over an existing slab or new pads, with airflow and bearer support sorted so the timber lasts down low.
Get a quote →
Decks more than a metre up, with footings and posts engineered for the height and a balustrade built to the NCC, timber, metal or glass.
Get a quote →An outdoor room, not just a deck: the deck plus a pergola, patio or roof over it, set out as one structure so the posts and footings carry both.
Get a quote →The board sets the look, the upkeep and most of the price. Here is how the three stack up near the coast, before you see a number, so you choose on the facts rather than a sales pitch.
Treated pine
H3 and H4 pine
Hardwood
Merbau, spotted gum
Composite
Modwood, Trex
Whichever board you pick, the substructure underneath is what really sets the lifespan, which is why our warranty covers the footings, bearers and posts. Price each board on the estimator below to see the gap.
Pick the board, roughly the size in m², the height and the balustrade, and get an honest supplied-and-installed range in under a minute, with the substructure and the balustrade counted in. It is free, it stores nothing, and it runs in your browser. It is a guide range, not a quote: the free site measure pins your exact number.
Before 
After 
Before 
After 
Before 
After The footings are a real, sequenced step, not an afterthought. They cure before any load goes on them.
We measure the space, check the ground, the falls and the height, talk through board and balustrade, mark the set-out, then put a written by-the-m² quote in your hands.
We dig and concrete the footings to depth, sized for the height and the ground, and set the posts plumb. The footings cure before any load goes on them. This is the substructure that holds the deck up.
The bearers and joists go on at the correct spacing for the board, closer together for composite, so the deck stays flat and never bounces. The frame is the deck; the boards are the finish.
Where the deck meets the house we fix and flash the ledger board properly, so the join carries the load and keeps water out of your wall instead of bolting straight on.
The boards go down at the right gap for drainage, screwed or hidden-fixed to the joists, raked and trimmed clean. Merbau, treated pine or the named composite, exactly as quoted.
We build the balustrade to the NCC and the stairs to suit the height, oil or finish the timber, clear the site, walk you around, and hand over the warranty and any compliance paperwork in writing.
What is actually on the quote
A lump-sum price for the deck with no board named, no footing or joist detail and nothing said about the balustrade is the warning sign, not the number itself. Here is everything that is in ours.
A small or ground-hugging deck over an existing slab or new pads, with the airflow and bearer support sorted so the timber lasts down low. No balustrade, usually no approval.
A proper backyard deck off the house in your chosen board, on concreted footings and correctly spaced joists, with the ledger flashed to the house and the finish oiled or fixed. The job we do most.
A deck more than a metre up, with engineered footings and posts for the height, a balustrade built to the NCC in timber, metal or glass, and stairs to the yard. The full structural job.
An outdoor room, the deck plus a pergola, patio or roof over it, set out as one structure so the posts and footings carry both. One team, one quote, one warranty, with the approval factored in.
The substructure layer, the footings, bearers and posts, is the one cowboys skimp, and the one we lead on.
10 years on the footings, bearers and posts, in writing. The part that holds the deck up and the part cowboys skimp: if the frame moves, sags or a footing fails in that time, we put it right. This is the decking-specific lever.
The boards, the ledger and flashing, the balustrade and the stairs, all installed to standard and warranted for workmanship, valid because we build the substructure to suit the board and the height.
The genuine composite manufacturer warranty on boards like Trex and Modwood, or the oil and coating warranty on timber, plus your rights under Australian Consumer Law, which always apply on top.
The NSW building licence, the liability, and the substructure warranty, all named up front.
Residential building work over $5000 needs a NSW Fair Trading contractor licence, and we hold it. A cash job with no licence leaves you exposed.
Lic. 000000C
Cover for your property and anyone on it, for the length of the build.
$20M
A 10-year written warranty on the footings, bearers and posts, the part that holds the deck up and the part cowboys skimp.
10 yr
The same crew that measures and quotes your deck builds it, then warrants the footings, bearers and posts for 10 years.
A free site measure and set-out, then an itemised by-the-m² quote in your hands.
Footings and frame to depth and spacing, boards and balustrade installed by our own crew, to the signed quote and the agreed dates.
A 10-year footings, bearers and posts warranty in writing, and the compliance paperwork for an elevated deck or a cover.
Wall of love
★★★★★ 4.9 average 187+ Google reviews
“Three quotes, and Deckline was the only one that gave us a real per-m² price before they even came out. The number on the day matched it, and the merbau colour and grade were named on the quote. A year on it has weathered to a rich red-brown and the frame has not moved a millimetre.”
“We went composite to skip the oiling and it was the right call near the water. Genuine Modwood, the board named on the quote, on a sub-frame with the joists closer together so it does not flex. Low-maintenance and it still looks new. Nathan was straight about the cost gap over hardwood up front.”
“Elevated deck off the back with a glass balustrade, looking down the slope to the water. Footings engineered for the height, the balustrade built to the NCC and passed inspection first time, no fail on a gap. The view is wide open and the whole thing feels rock solid underfoot.”
“Budget was tight so we went treated pine, but they built the frame underneath properly, H4 in the ground and concreted footings, not pads on the dirt. It is dead flat and we will stain it once it dries out. Honest about where pine suits and where it does not.”
“Deck and a louvre roof done as one job, set out so the posts carry both. They sorted the approval, matched the gutters and colour to the house, and it reads like it was always there. One team, one quote, one warranty, exactly as promised.”
“Replaced a tired grey deck with composite, the old bearers were rotted out so it needed a full new substructure. Old deck carted away, disposal on the quote, no surprises at the end. A block from the water and they spec'd the frame and the board for the salt.”
“Low deck over an old concrete slab to lift a dull courtyard. They checked the falls and set it up so air moves underneath, so it will not trap water and rot. No balustrade or approval needed and they confirmed that on the quote before we started. Tidy job, quick turnaround.”
“Spotted gum deck off the back, the board chosen with us for the look and the coastal exposure. Boards hidden-fixed at the right gap so there are no screws on top and the water drains. The substructure warranty in writing was the thing that won it over the cheaper mob.”
“Second-storey deck with stairs down to the yard on a sloping block. They engineered the posts and footings for the height, flashed the ledger properly where it meets the house, and built timber-and-metal balustrade to the NCC. Felt safe and solid from day one.”
No travel surcharge within 30km of Erina.
10 suburbs across the Central Coast. No surcharge within 30km of Erina.
Larger mapEight short videos: the FAQ, what a deck costs, how we work, who you are dealing with, and a full build from first call to handover.
Cost per m², hardwood versus composite, council approval, the balustrade, what is under the boards, how long it takes, coastal upkeep, and whether we are licensed. Ten minutes here saves an hour on the day.
Tell us what you need. We’ll book a walkthrough and send a quote with the work itemised, not just a number.
Deckline Decks 