Build Your Dream Deck with a Local Sydney Deck Builder
Timber & Composite Decking by Sydney’s professional deck builders
UrbanArch Building is a father-and-son team of deck builders Sydney homeowners have trusted for over 20 years. Tony and the crew design and build custom composite and timber decks — along with the stairs, balustrades and screens that finish them — and handle everything from the first sketch to council approval to the last board.
Every project is built and managed by us, and backed by a 10-year workmanship warranty. It’s why we’re rated 4.7★ on Google by homeowners across Sydney, Wollongong and the Southern Highlands.
Licensed and insured
10 – year workmanship warranty
4.7★ on Google
Deck Builders Across Sydney, Wollongong & the Southern Highlands
Based in Narellan Vale in Sydney’s south-west, we build across the whole metro area — from the Sutherland Shire and St George to the Hills District, Inner West, Eastern Suburbs, North Shore and Northern Beaches — plus Wollongong and the Southern Highlands. Residential or commercial, sloping block or rooftop, we’ve built on it.
Looking for a deck builder near you? Start here: Deck Builders Sutherland Shire · Deck Builders Hills District
Composite or Timber? Sydney's Specialists in Both
Composite deck builders Sydney
Trex, Millboard and TimberTech boards that never need oiling and shrug off salt air and harsh sun — ideal for coastal and poolside homes. Composite typically runs $750–$1280 per square metre installed (Millboard and TimberTech Azek Vintage sit at the higher end), with product warranties of 25–50 years
Timber deck builders Sydney
Australian hardwoods — Spotted Gum, Blackbutt, Ironbark, Jarrah, Merbau and Teak — selected for your site’s conditions and finished to bring out the grain. Nothing matches real timber underfoot.
Not sure where your budget lands? Try our free deck cost calculator for an instant ballpark.
Stairs, Balustrades, Screens and Pergolas
The details that finish a deck — designed and built to the same standard as the deck itself.
Custom External Stairs
Timber, composite and steel staircases built to Australian building codes — from simple deck steps to mono-stringer showpieces.
Balustrades & Handrails
Glass, aluminium, wire and timber balustrades that keep your deck safe, NCC-compliant and beautiful.
Privacy Screens
Custom screens in timber, composite and aluminium — privacy without losing the light.
Pergolas
Timber and aluminium pergolas that turn a deck into an all-seasons outdoor room.
Every Kind of Deck We Build
Twenty years of Sydney backyards, balconies and businesses:
Pool Decks
Salt-smart composite and hardwood surrounds that stay cool and safe underfoot.
Apartment Decks
Compact, strata-friendly builds that make every square metre count.
Multi level Decks
Split-level designs that turn sloping blocks into zoned outdoor living.
Building with Trex, Millboard or TimberTech? We build every composite deck to the manufacturer’s installation specifications — so your warranty stands
Like to know more about Hardwood and Composite decking costs. Try our decking cost calculator for Australia, or get in touch and have a chat with Tony or Dean about what you’ve got in mind.
Trusted brands we build with: Trex, Millboard & Timbertech
We’re accredited installers who build to manufacturer spec — so product warranties of up to 50 years actually hold.
What Sydney homeowners say about us
Frequently Asked Questions
Composite decking such as Trex typically runs $750–$980 per square metre installed, with hardwood timber decks varying by species and site. For an instant ballpark on your deck size, try our free deck cost calculator — then we’ll confirm it with a free consultation.
Yes. UrbanArch Building is a licensed and fully insured building company, and every deck we build is backed by a 10-year workmanship warranty. You’ll deal directly with Tony and Dean — the father-and-son team who actually build your deck.
We build decks across the Sydney metro area — including the Hills District, Sutherland Shire and Parramatta — plus Wollongong and the Southern Highlands.
It depends on how you’ll use it. Composite (Trex, TimberTech, Millboard, NewTechWood) costs more upfront but needs almost no maintenance. Australian hardwoods like blackbutt, ironbark and spotted gum cost less per board and age beautifully, but need regular oiling. We’ll give you a straight recommendation for your site.
Small, low decks can often be built as exempt development, while larger or elevated decks need approval. We assess this at your free site inspection and handle the compliance side for you.
Most decks take one to three weeks on site, once design and any approvals are done. Winter is the smart time to book — design and approvals happen now, and your deck is ready before summer.