8 Best Decking Contractors in Singapore (August 2026)

Before you compare contractors, settle the material, because it changes the price, the upkeep and who you should even be calling. There are three broad families for a Singapore deck, plus aluminium as a niche option, and they are not interchangeable.

Composite and WPC (wood plastic composite) are the default for most balconies and condos now, and for good reason. The boards are a blend of recycled plastic and wood fibre, so they are termite proof, splinter free and do not need the yearly oiling that real timber demands. They shrug off rain, sun and humidity, which is exactly what you want here, and a rinse with water keeps them looking new. The trade off is that a dark composite board can get hot underfoot in direct afternoon sun, and the very cheapest uncapped boards can fade, so the capped (cWPC) versions from a good brand are worth the extra.

Natural hardwoods are the choice when you want real timber warmth and grain. Chengal is the most durable hardwood commonly used here, naturally resistant to decay and moisture, and it is the classic Singapore decking wood. Balau and Merbau are the dense, dependable mid options, both resistant to rot and insects. The catch with all natural timber is maintenance: it greys and needs periodic sanding and re-oiling to keep its colour, so you are trading low upkeep for the look and feel of the real thing. Accoya is the premium step, a modified softwood that barely shrinks or swells and resists rot exceptionally well, so it behaves like a stable hardwood while taking a stain beautifully. Aluminium decking exists for rooftops and fire-rated situations where zero rot and low weight matter most, but it is a niche buy rather than a home default.

One more thing to settle upfront, and it is the one most people skip: what happens under the deck. On a balcony or terrace the boards sit on a substructure of joists, usually aluminium or treated timber, raised on adjustable pedestals so water can drain away underneath. In our climate that drainage layer and the waterproofing membrane below it are what keep the space dry and the frame sound. A deck is only as good as the frame and drainage you cannot see, so make that part of the conversation, not an afterthought.

Prices move with the board grade, the brand, the substructure (aluminium frames and adjustable pedestals cost more than basic timber joists), how much levelling and waterproofing prep the area needs, and how the deck is finished at the edges. Location changes it too. A small HDB or condo balcony often works out higher per square foot than a large open patio, because the fixed costs of the survey, the frame and the waterproofing check are spread over fewer boards. A poolside or wet-area deck usually costs a little more again, because it needs an anti-slip surface and a more robust, well-drained substructure to cope with constant splashing. Always measure your area early and compare quotes on the same material, board grade and substructure, because that is the only fair comparison.

1. The right material advice, not just a hard sell. A good contractor asks where the deck goes, whether it is a covered balcony or a fully exposed poolside, and how much upkeep you are willing to do, then recommends composite, hardwood or Accoya accordingly rather than pushing the one line it stocks.
2. A proper substructure and drainage plan. The joists, the adjustable pedestals and the drainage gaps under the boards are what keep the deck sound in our rain. Springy boards, ponding water or a frame that traps moisture are the classic signs this was skipped, so make the frame part of the quote.
3. Waterproofing respected, not damaged. On a balcony or terrace the deck sits over a waterproofing membrane and drainage outlets, and a good contractor lays over them without piercing or blocking them. If yours is failing, sort it first with a waterproofing specialist, because a deck over a leaking balcony just hides the problem.
4. Honesty about HDB rules. On an HDB balcony you generally lay decking over the existing floor rather than hacking it, and you must not damage or obstruct the balcony drainage and waterproofing, with some works needing approval. Check the current guidelines on HDB before you commit, and for structural or safety standards on raised or rooftop decks you can also reference BCA.
5. Slip resistance and a real warranty in writing. Ask for an anti-slip textured or grooved surface for any wet or poolside area, and get the warranty covering the board, the substructure and the workmanship in writing, because installation and frame faults are where decks actually fail.

I am not a decking company. I built this list the way I research any outdoor renovation category: reading through Google reviews, renovation and landscaping forums and local guides, checking each contractor's live website for what it actually supplies and installs, and weighing the difference between a composite-first shop and a genuine hardwood specialist.

Prices, ranges and ratings shift over time, so treat the figures here as a guide rather than a quote, and confirm the current numbers, warranty terms and substructure details with the contractor before you commit. My aim was simple: give you a shortlist I would genuinely use myself, led by a strong composite specialist and covering both the low-maintenance and the real-timber routes.

Neither is universally better, they solve different priorities, so the honest answer is that it depends on how much upkeep you want to do. Composite and WPC win on maintenance: they are termite proof, splinter free, do not need yearly oiling and shrug off our rain and humidity, which is why they are the default for most balconies and busy family homes. The trade-offs are that a dark composite board can get warm underfoot in direct afternoon sun, and even a good board never quite matches the depth of real grain. Natural timber like Chengal, Balau or Merbau gives you that unbeatable warmth and ages beautifully, but it greys and needs periodic sanding and re-oiling to hold its colour, so you are buying a look in exchange for ongoing care. Accoya sits in between, a modified wood that behaves with the stability of composite while still being genuine timber. For a low-fuss balcony, I lean composite; for a statement garden or poolside deck where you love the material, real hardwood or Accoya is worth the maintenance.

In most cases yes, but with rules. On an HDB balcony you generally lay the decking over the existing floor finish rather than hacking out the original screed, which keeps cost and mess down and protects the waterproofing below. The critical constraints are that you must not damage or obstruct the balcony drainage outlets and the waterproofing membrane, and you should keep the deck removable enough that the drainage can still be inspected and maintained. Some balcony works need HDB approval, so always check the current renovation guidelines on the HDB website or ask your contractor to confirm before any decking goes down. A good decking contractor will raise the boards on a drained substructure that lets water run to the existing outlets rather than sealing the balcony floor and trapping it.

On any raised balcony, terrace or rooftop over a living space, yes, and it is the single most important thing under the boards. The deck itself is not the waterproof layer, the membrane on the concrete below it is, and the decking simply sits over that on a drained frame. If the existing waterproofing is failing, laying a deck on top only hides the leak while it keeps travelling into the unit below, so the membrane has to be sound first. That is why I treat decking and waterproofing as a pair on any balcony job. If yours is old or you see water marks on the ceiling below, get a waterproofing specialist to check and, if needed, redo the membrane before the deck goes on. A ground-level garden deck on soil is more forgiving, but it still needs good drainage and airflow underneath so the frame does not sit in standing water.

It depends on the material and the care. A quality capped composite or WPC deck typically lasts well over a decade with almost no maintenance beyond an occasional rinse, and premium brands back that with long warranties, which is a big part of their appeal in our sun and rain. Natural hardwoods like Chengal, Balau and Merbau can last a very long time too, Chengal especially given its natural durability, but only if you maintain them, sanding and re-oiling periodically to fight the greying and surface weathering that constant sun and humidity cause. Accoya is engineered for exactly this climate and is highly rot resistant, so it holds up well with modest care. Across every material, the substructure and drainage are the hidden factor: a deck on a well-drained, non-rotting frame lasts far longer than identical boards laid over trapped water, so the frame quality matters as much as the boards on top.