The cheapest sensible deck in Pakenham is $250 per m², and here is where cheap starts costing you
A simple rectangular treated pine deck, ground level, under 20m² and under 800mm high so no permit is needed, costs $250 to $320 per m² fitted: about $5,000 to $6,400 for 18m². Push that same deck to 30m² and you are at $7,500 to $9,600. The savings that are safe come from shape, height and paperwork. The savings that are not safe come from footings, frame timber and joist spacing, and they get paid back with interest around year six.
Three tiers on the same 30m² Pakenham deck
Same footprint, same backyard, three genuinely different specifications. Prices are 2026 fitted totals including labour, materials and rubbish removal, on a ground-level deck with good access.
| Tier | Price for 30m² | What you get | What you give up | Who should pick it |
|---|---|---|---|---|
| Budget | $7,500 - $9,600 | H3 treated pine boards and frame, joists at 450mm centres, H4 posts on proper footings, coated fixings, simple rectangle, one low step, you oil it yourself. | The look and the lifespan. Pine greys fast, dents easily and is done at 12 to 15 years even when maintained. No balustrade, so the deck has to stay low. | Landlords, first homes in Officer and Pakenham East where cash is tight, and anyone who expects to extend the house within a decade. |
| Mid | $9,500 - $13,500 | Merbau 90 x 19 pre-oiled before laying, H3 frame at 450mm centres, 1.2m pad footings or screw piles, 316 stainless fixings, two steps, drainage gap at the house, first coat of oil included. | Nothing structural. You still oil it every 12 to 18 months, and merbau bleeds tannin over paving for the first season. | Most families. This is the tier about seven in ten Pakenham and Cardinia Lakes jobs land on, and the one we recommend by default. |
| Premium | $15,000 - $24,000 | Capped composite or spotted gum, tighter joist centres, engineered substructure, steel or glass balustrade, deck and step lighting, wider stairs, posts and footings pre-set for a future pergola. | Cash up front. Composite never looks quite like fresh oiled hardwood, and dark boards get hot underfoot in January. | Homes staying put 10 years or more, pool surrounds, elevated decks that need a balustrade anyway, and anyone who will not maintain timber. |
| Add: elevated over 1m | add $2,800 - $6,500 | Engineered substructure, compliant barrier at least 1m high, stair balustrade, engineering certificate. | Not optional. A barrier is required once the drop exceeds 1m, and the certificate is required for the permit. | Sloping blocks in Beaconsfield Upper, Emerald and Pakenham Upper, and any deck off a raised living area. |
| Add: pergola over the deck | add $4,000 - $12,000 | Open frame or roofed, posts tied into the deck structure, stormwater connected if roofed. | Lead time and, if roofed, usually a building permit. | West-facing decks in Pakenham, Officer and Nar Nar Goon where afternoon sun makes the deck unusable from December to February. |
2026 Cardinia Shire rates. Permit, surveyor and engineering fees are separate and are set out below. Call (03) 9022 6418 for a fixed number.
Where you can safely save money
Stay under the permit threshold. A deck under 20m² of floor area and no more than 800mm above natural ground level is exempt from a building permit in most residential situations in Victoria. Crossing either line brings in a building permit, a private building surveyor and usually an engineering certificate, which together run about $1,000 to $2,400 before a single board is cut. If your plan is 22m² at 900mm, redraw it at 19.5m² at 750mm and you have saved real money for very little lost space. Bushfire and heritage overlay properties are the exception and need approval regardless, so check the Victorian permit rules for your address first.
Keep the shape boring. A rectangle is the cheapest deck per square metre there is. Angles, curves, herringbone patterns and 45 degree board runs add 10 to 15 per cent in wastage and more in labour. A deck sized to standard board lengths wastes less again: merbau typically comes in packs around 5.4m, so a 5.4m or 3.6m run cuts almost nothing off the end.
Do the demolition and the oiling yourself. Pulling up and carting away an old deck is $45 to $85 per m² when we do it. If you are fit and have a trailer, that is a weekend and a tip fee. Oiling is $12 to $25 per m², which is $360 to $750 on a 30m² deck, and it is a genuinely simple job with a lambswool applicator on a dry, mild day. Both of these are safe to take on because neither carries structural risk.
Book in the quiet season. Materials do not get cheaper in winter, but June to August is the quietest booking window and there is more room to schedule around your dates. More importantly, permits, engineering and 3 to 6 week material lead times stop being rush decisions. The timing guide sets out month by month what is realistic.
Stage the project, but design it all now. Deck this year, pergola next year, outdoor kitchen the year after is a sensible way to spread the cost. The trap is retro-fitting. Pergola posts landing on footings that were never designed to carry them means lifting boards and pouring new footings, which costs two to three times what it would have cost to put the right footings in on day one. Have the whole thing drawn now and built in stages.
Tell us the budget you actually have and we will tell you what it buys, or tell you honestly that it does not stretch to the deck you have described.
☎ Call (03) 9022 6418Where saving money is a false economy
Footings. Most of the Pakenham and Officer growth corridor sits on Class M to H1 reactive clay that swells and shrinks with the seasons. Short 600mm stumps look identical to 1.2m pad footings on the day the boards go down, and they cost maybe $600 less on a 30m² deck. Three winters later the deck has a hump in it, the boards have twisted and the fix is to lift the lot. This is the single worst place to save money in Cardinia.
Frame timber and joist spacing. Untreated or H2 pine in an outdoor frame will rot. Joists at 600mm instead of 450mm save two or three lengths of timber and give you a deck that flexes every time someone walks across it. Neither saving is visible at handover and both are permanent.
Fixings in hardwood. Galvanised screws in merbau or spotted gum leave black stains down every board within two summers. Stainless in 316 grade costs $120 to $250 more on a 30m² deck.
Building on top of a frame that is already gone. New boards on a 20 year old rotten frame is the most expensive deck you can buy, because you pay for the boards twice. If the existing deck feels soft, read spongy deck boards and get the frame assessed before you spend anything on the surface.
Skipping the permit where one is required. Unpermitted structural work can turn up at sale in the section 32 process, and a building surveyor will not certify it after the fact without opening things up. It also gives your insurer a reason to argue if someone is hurt. There is no version of this that saves money.
What a suspiciously low quote is actually leaving out
When one quote comes in 25 per cent under three others, it is very rarely because that builder is cheaper. It is because the quote is smaller. Six things are missing almost every time.
- Footing type and depth. If it does not say 1.2m pad footings or screw piles, assume short stumps.
- Joist and bearer centres. If it does not say 450mm, assume 600mm.
- Demolition and disposal. Removing the old deck and the tip fees, commonly $45 to $85 per m² plus $350 to $500 for a skip.
- Stairs and the balustrade. A barrier is required once the deck is more than 1m above the surface below, and stairs run $180 to $320 per riser.
- Permit, surveyor and engineering. Roughly $1,000 to $2,400 combined when a permit is needed, plus the state building permit levy on works over $10,000.
- Oiling and the finish. Whether the first two coats are in the price, and whether the boards are pre-oiled on all four faces before they are laid.
Ask all three quoters for those six lines in writing and the cheap quote usually moves to the middle of the pack. Our quote comparison guide has the full list, and the pricing page shows what each item should cost so you can sanity check any line.
Rebates, concessions and the tax angle in Victoria
Let us be straight about this: there is no Victorian rebate, grant or concession for building a deck, pergola or outdoor living area. Not from the state, not from Cardinia Shire, not from the federal government. Solar Victoria rebates cover solar, batteries, hot water and heat pumps, and none of that helps you here. If a salesperson implies a government program will fund part of your deck, that is your signal to stop.
Two things do change the maths. First, if the property is an investment, a new deck is normally treated as capital works rather than a repair, which for a residential rental generally means a deduction of 2.5 per cent a year over 40 years, and the written down value of the old deck you demolished may be claimable in the year of demolition. That is a conversation for your accountant with the invoice in front of them, not a reason to build. Second, if you are selling, the return is real but bounded: a well built deck typically returns a meaningful share of its cost at sale rather than all of it, and the cost versus value page works through what that looks like in this market.
One more piece of arithmetic. Once the contract price passes the thresholds set by Victorian domestic building law, a written major domestic building contract is required and domestic building insurance has to be taken out by the builder, and the cost of that insurance is passed on in the price. That is a feature, not a fee to avoid: it is the cover that pays if the builder disappears. Anyone offering to keep the job under the threshold by splitting it into two contracts is removing your protection, not saving you money. The warranty and dispute page explains what that cover actually does.
Our honest recommendation, and when not to build at all
If your budget for a 30m² deck is under about $7,000, do not build a smaller version of the deck you want in cheap materials. Either build a genuinely smaller deck properly, say 18 to 20m² in merbau at $5,600 to $7,600, or wait a season. A small good deck is a pleasure for 25 years. A big bad one is a liability in six.
If you already have a deck and the frame is sound, restoration at $25 to $55 per m² will give you most of the visual result for roughly a tenth of the cost of replacement. That is $750 to $1,650 on a 30m² deck against $9,500 to $13,500 to rebuild it, and we will tell you on site if that is the right call. The restoration cost guide and the restoration service page cover what is involved.
And if the honest answer is that you need a paved or concrete alfresco rather than a deck, we will say so. We do not do concreting, paving or landscaping, so there is nothing in it for us to talk you into timber. Before you commit to a material, the board specification guide compares what each option really costs to own, and if you want to check quantities yourself, use the decking quantity estimator.
Tell us your budget and we will tell you what it builds
Send a budget and a rough size and we reply within 1 business day with the tier it lands in and what would have to change.