The cheapest sensible way to fix a wet Toowoomba yard, and when cheap costs more.
The cheapest fix that genuinely works on a typical Toowoomba block is $1,800 to $3,500: collect the downpipes into one line to a lawful kerb outlet and form a spoon drain across the wet run. Mid tier, which is where most homes land, is $4,500 to $8,500. Premium, meaning full site drainage with a charged section, a wrapped subsoil network and a certified council connection, is $9,000 to $18,000. Choosing the cheap tier is not a mistake. Buying the mid tier built to a cheap specification is: it saves about 25 per cent and lasts one to three wet seasons.
Almost every drainage enquiry we take starts with a version of the same sentence: the yard is wet, and how little can we get away with spending. It is a fair question and it has a real answer. Drainage is unusual in that the cheapest option is often genuinely correct, because most of the water causing the problem is roof water that simply was never taken anywhere. What is never correct is the mid sized job built out of the cheapest materials, because that is the one you pay for twice. This page separates those two ideas properly.
Three tiers, real 2026 Toowoomba prices
These are complete installed prices for a standard suburban block of roughly 600 to 800 square metres with a house of 150 to 200 square metres of roof, on deep black soil, with a kerb outlet available at the front. Acreage, rock and long outlet runs push every tier up.
| Tier | 2026 installed price | What you get | What you give up | Who should pick it |
|---|---|---|---|---|
| Budget Source fix only | $1,800 - $3,500 | Two to four downpipes collected into a single 100mm line, one or two pits, run to the existing kerb outlet. One formed spoon drain or short swale across the wet run. Gravel bedding still included, because that is not optional. Turf relaid over the trench. | No subsoil relief, so a genuinely saturated profile stays soft. No channel drain at the garage. Surface water crossing the block from a neighbouring property is not addressed. No council application, so no new connection and no tank. | Homes where the yard is soft only after rain, the downpipes currently discharge onto the lawn, and there is a usable fall to the street. Also the right first stage for anyone planning to spend more later. |
| Mid Most Toowoomba homes | $4,500 - $8,500 | All downpipes collected and piped to the kerb, three or four pits, plus 30 to 60 metres of geotextile lined subsoil drain through the wet zone into a silt pit. A Class B channel at the garage threshold. Heavier grade pipe under any driveway crossing. Full reinstatement and spoil removed. | No detention or retention tank. No charged system unless the site genuinely needs one. Landscaping, retaining and paving reinstatement beyond turf and topsoil are excluded. | The typical 1970s to 2000s brick veneer home in Glenvale, Kearneys Spring, Wilsonton or Newtown with a flat back yard that stays boggy for a week and water tracking towards the garage. |
| Premium Whole of site | $9,000 - $18,000 | Everything in the mid tier, plus a charged (wet) section where the outlet sits above the collection point, a full subsoil grid rather than single runs, trafficable Class B or C grates, a detention or retention tank where an approval requires it, camera verification of the finished line and the Toowoomba Regional Council application and compliance paperwork lodged for you. | Money, and about a week of your yard. Very little else. On a block that does not need a tank or a charged line, the extra spend over mid tier buys robustness rather than a different outcome. | New builds and subdivisions carrying an on site detention condition, acreage at Highfields or Westbrook with a genuine water table problem, sloping blocks below a neighbour, and anyone who has already paid twice. |
Indicative installed 2026 ranges for the Toowoomba region, GST inclusive. Rock, long outlet runs and difficult access move all three tiers. Full item by item ranges are on the pricing page.
Our straight recommendation: if you have never had drainage work done on the block, start at the budget tier and give it one wet season. Roughly two thirds of the wet yards we look at in Toowoomba are being fed by roof water that has nowhere to go, and once that is piped away the ground dries out on its own. If it is still soft next autumn, add the subsoil lines then and you will have spent mid tier money over two years for a better result, because the second stage gets designed around what is actually still wet.
Six places you can safely spend less.
1. Stage the work across two seasons.
This is the biggest lever and it costs you nothing but patience. Pipe the roof water first at $2,500 to $6,000, then wait through one full wet season and see what is still soft. On a large share of blocks, nothing is, and you have saved the $2,000 to $4,000 of subsoil work you would otherwise have bought on day one. Where the yard is still wet, the second stage is cheaper to design because you can point at the exact area rather than paying us to guess.
2. Do the prep yourself.
Crew time on a drainage job runs roughly $95 to $130 an hour, and a surprising amount of it goes on work that does not need a licence. Lift and stack the turf along the trench line the weekend before. Move the pots, the pavers, the trampoline, the woodpile and the bins. Cut the shrubs back hard off the line. Take down the fence panel yourself if it needs to come out. Empty the shed if the trench passes the door. That is realistically 4 to 10 hours removed from the job, or $400 to $1,200. Tell the contractor you intend to do it so it comes off the quote rather than being a pleasant surprise for them.
3. Keep the spoil if you have a use for it.
A 40 metre trench at 300 by 500 produces roughly 7 to 8 cubic metres of loose spoil, which is one to two tandem tipper loads and $250 to $600 of cartage and tip fees. If you have a low corner to raise, a garden bed to mound or a paddock to spread it on, ask for it to be left in a heap instead. Black soil is decent fill and terrible topsoil, so put it under, not over.
4. Book in the dry half of the year.
The rush in Toowoomba is November to March, straight after the first serious storms, when every drainer in the region has a three to six week queue and no reason to sharpen a pencil. From about May to September the ground is firm, the black soil trenches cleanly with vertical walls, compaction is easy and the diary has gaps. Expect 5 to 12 per cent off, faster scheduling, and honestly a better job. The seasonal timing guide goes into the detail.
5. Stay on standard sizes.
100mm pipe, 300 by 300 pits, standard width channel, standard 2 metre geotextile rolls and off the shelf ductile iron grates. Custom width channel and specialty grates can add 30 to 60 per cent to that part of the job and move no more water. The only place to deliberately go non standard is diameter, and only upwards, where a single line is collecting a large roof.
6. Bundle it with work that is already happening.
A trench under a driveway costs a few hundred dollars before the concrete is poured and $1,500 to $3,500 after. If a driveway, shed slab, pool, deck or landscaping job is coming up, get the drainage sleeved and stubbed while the ground is already open. The same applies to a neighbouring property: two adjoining jobs on the same day share the machine float and setup and typically save each household $300 to $600.
Want the budget tier priced honestly on your block?
We will tell you if the cheap option will fix it, and we will tell you if it will not.
Five places saving money is a false economy.
Each of these has a number attached, because the argument only makes sense with the numbers on both sides.
- Geotextile on a subsoil drain. Saves about $6 to $12 per metre, so $240 to $480 on a 40 metre run. Costs the whole run, because an unwrapped ag line in Toowoomba black soil is usually finished in one to three wet seasons and cannot be cleaned. Replacement is the full $3,200 to $5,600 again.
- Gravel bedding under stormwater pipe. Saves $15 to $25 per metre. Takes a 50 to 80 year line down to 10 to 20 years, because reactive clay supports the pipe on random hard points and works the joints apart. The lifespan page explains the mechanism in detail.
- Skipping a camera inspection before a repair. Saves $220 to $450. Regularly costs $1,000 or more, because the crew digs where the blockage is rather than where the fault is, and the same drain blocks again next season. If you have paid for two clears in two years, buy the camera.
- Cutting the outlet short. The classic version is running the line to the back fence or into a soak pit in the same clay that is already saturated. Saves $600 to $1,800 of trenching to the street. Achieves nothing, and discharging onto a neighbouring property is unlawful, so it can also cost you the job twice plus a dispute.
- Skipping the council application where one is required. Saves $450 to $1,200. Leaves you with an uncertified connection, which surfaces later at sale or refinance when a solicitor or a surveyor asks for the paperwork. The approval page sets out when it genuinely applies.
What a suspiciously low quote is usually leaving out.
A quote that is 40 per cent under the others is almost never a more efficient operator. It is a different scope written in similar words. These are the eight omissions we see, and every one of them is fair to ask about directly.
- Reinstatement. Turf, topsoil and levelling. Worth $600 to $2,000 on a typical job and very easy to leave off a quote in a single missing line.
- Spoil removal. $250 to $600. If it is not in the quote, the heap is yours.
- Pits. $280 to $520 each installed, and a proper job needs one at every junction and change of direction. A quote with no pits is a quote for a line that cannot be maintained.
- Bedding aggregate and geotextile. The two items covered above. Both are invisible after backfill, which is exactly why they disappear from cheap quotes.
- Heavier grade pipe under crossings. $40 to $60 per metre extra for the five or six metres that matter.
- Council application and inspection. $450 to $1,200 where the job needs one.
- The lawful point of discharge. Watch for wording like to the rear boundary or to an existing soak. Ask, in writing, where the water finally goes.
- GST. A price quoted plus GST against prices quoted including GST is an instant 10 per cent illusion.
Send every quote the same eight questions by email and keep the replies. The choosing a drainer guide has the licensing and insurance questions to send with them.
Rebates, tax and insurance in Queensland, and what they really change.
People often budget on the assumption that something will come back. Here is the honest position for a Toowoomba homeowner in 2026.
There is no standing state rebate for private drainage.
Queensland does not run a general subsidy for stormwater or subsoil drainage on an established home. The program people most often have in mind is the Resilient Homes Fund, which was a flood recovery measure attached to the 2021 and 2022 South East Queensland flood events and offered retrofits, raising and voluntary buy backs to eligible flood affected properties. It was never a general drainage subsidy. If you are told a rebate covers ordinary yard drainage, ask which program, and check it yourself.
Council rainwater tank incentives come and go.
Local government tank rebates appear and lapse depending on the year and the water position. It is worth a direct check with Toowoomba Regional Council before you budget on one. Note the distinction that catches people out: a retention tank that stores water for reuse can sometimes attract an incentive, while a pure detention tank, which exists only to slow the peak flow and then empties itself, generally cannot, because it holds no usable water. Our tanks page explains the difference.
Insurance covers the damage, rarely the drain.
Home policies commonly respond to resultant damage from a sudden escape of water, and commonly exclude gradual seepage and the cost of fixing the failed drain itself. That means a burst or collapsed line that floods a room can produce a claim for the room and not for the pipe. Getting the sequence and the evidence right matters a great deal here, and it is set out on the insurance claims page.
Tax changes the maths on a rental.
For an investment property, repairing an existing drain is generally treated differently from installing drainage that was never there, which is usually capital works written off slowly over decades rather than claimed in the year. That difference can be worth more than any discount you negotiate, so it is worth a conversation with your accountant before you decide the scope, and worth keeping the invoice wording accurate. There is more on landlord specific issues on the rental property page.
Selling changes it too.
If you are listing the house, spending $2,500 to $4,000 to stop water visibly pooling against the slab usually returns more than it costs, because a wet yard reads to a buyer as an unknown and unknowns get discounted hard. Spending $15,000 on a premium system three weeks before auction does not. The pre sale page has the detail.
When the right answer is to spend nothing at all.
We would rather tell you this at the free measure than take a deposit. There are three situations where the honest recommendation is to do nothing yet.
- The yard has only been wet after genuinely exceptional rain. Toowoomba gets storm cells that will pond water on any block, sealed or not. If the lawn is soft for two days after 80mm in an hour and dry the rest of the year, that is a normal yard, not a drainage fault.
- The gutters, downpipes or existing pits are simply blocked. We are called to plenty of wet yards that turn out to be a full gutter, a downpipe discharging into a garden bed, or a kerb outlet buried under years of mulch. Clear those first, at no cost, and watch the next storm with your phone. A fair number of enquiries end there.
- Something changed next door very recently. A new fence on a footing, a new slab, a filled block or a removed tree can redirect surface water onto you. Fixing your side works, but it is worth understanding the cause before you pay for the cure, because sometimes the correct fix is a conversation. The early signs guide helps you read what you are seeing.
And the standing limit on what we do: we are drainage contractors. We do not do landscaping, retaining walls, decorative paving or roof plumbing, so if the real problem is a gutter that overshoots or a retaining wall with no weep holes, we will say so and point you at the right trade rather than sell you a trench.
Budget questions we get asked.
What is the cheapest drainage fix that actually works in Toowoomba?
Can I save money by doing some of the drainage work myself?
Is it cheaper to do drainage in winter in Toowoomba?
Why is one drainage quote thousands cheaper than the others?
Is there a Queensland rebate for drainage work?
Should I stage drainage work over two years?
Get all three tiers priced for your block
Send this and we book a free on site measure, then send one written quote showing the budget, mid and premium options side by side, usually within 7 days.
Work out how much you actually need before you set a budget.
The sizing estimator turns metres and pits into a realistic range, and the materials page tells you what to specify.