Updated October 2026
Dunwich is the arrival town on North Stradbroke Island (Minjerribah), where the vehicle barge lands, and the oldest European settlement on the island. It is also the township with the most mixed drainage picture in the Redlands, because roughly half of it is on the sewer and roughly half is not. Redlands Blocked Drains is a local referral service. We put you in touch with QBCC-licensed local plumbers who work in Dunwich.
Getting a plumber here, honestly
A work vehicle reaches Dunwich on the vehicle barge from Toondah Harbour at Cleveland, which runs about 45 to 50 minutes each way. Vehicles have to be booked ahead, the passenger ferries do not carry work vehicles or equipment, services can run late at low water on spring tides, and vehicle access permits apply on the island. So this is not a job anyone can promise to do today.
What we will do is call you back promptly and tell you honestly whether a local plumber can get to you, and when. Some of the trades who work the island live on it, which is often the fastest answer and usually the cheapest, because there is no crossing in their costs.
For current barge bookings and fares, go to the operator at SeaLink. This site publishes no fare and no timetable, because a state subsidy, an operator discount and a fuel surcharge all apply and the figures move.
North Stradbroke Island is also Minjerribah, the Quandamooka people hold recognised rights over the island, and large parts of it are national park and Quandamooka land. Vehicle access permits apply, and access and works are not unrestricted anywhere on the island.
About half of Dunwich is unsewered
This is the fact that decides which half of this page applies to you. Redland City Council states that approximately half the urban areas of Dunwich and Point Lookout are unsewered. The council also runs a wastewater treatment plant at Dunwich, which is why the other half is connected.
The council publishes no property-level service map that this site could retrieve, so this page will not tell you that any particular street or part of town is sewered or unsewered. Anyone who does is guessing. A council property search or a service enquiry is how you find out which side of that line your address sits on, and it is worth doing before you call a plumber, because the diagnosis differs completely.
If you are connected, the council's three-step test applies. One fixture slow and the rest of the house fine means the problem is most likely in your home's plumbing. The overflow relief gully overflowing while no water is being used on the property means the blockage is likely to be in the council's sewer main, so clear any obstruction, check the grate moves freely and contact the council. An inspection opening that holds water or drains slowly while an indoor tap runs means contact the council, and one that stays dry means the house plumbing.
The sewer mains in the sewered parts of the Redlands belong to Redland City Council, through its water and wastewater business, City Water (previously Redland Water). Your own drain line, from the house to the connection point, is yours. The full guide covers the reimbursement path.
If you are not connected, there is no council main in the question at all. The tank, the pump and the trenches or irrigation field are yours, and a back-up is as likely to be a full tank, a failed pump or blower or a saturated disposal area as a blocked pipe. The septic and on-site wastewater page covers it.
What actually goes wrong in Dunwich
- Sandy ground. Island soil is sand, which washes into stormwater pits and settles in flat runs, and which drains very differently from mainland clay.
- Heavy wet-season rainfall on low ground, saturating on-site disposal areas and loading stormwater runs with sand and leaf litter.
- Older jointed line in the longer-established parts of the township, with the usual root intrusion at the joints.
- Intermittent use. A share of the housing is holiday or part-time, so dry traps, idle treatment systems and problems found late are all common.
- Capacity spikes. A full house on a long weekend will overload an on-site system sized for ordinary use.
What it costs
Clearing a blocked line is ordinary drain work in the usual $150 to $400 range, with a camera at $249 to $600 and jetting bundled at $350 to $900. Relining typically runs $3,000 to $8,000 or more, and it suits island work well because it is planned rather than urgent. On-site wastewater work is priced separately. If a mainland plumber crosses, the barge booking and most of a day of travel go into the price. The cost guide sets out the ranges.
Frequently asked questions
How do I find out if my place is on the sewer?
A council property search or a service enquiry. This site will not guess by street, because the council publishes about half the urban area as unsewered without a public property-level map.
How long until a plumber can get here?
The callback is prompt. Attendance depends on the next available vehicle barge from Cleveland and on whether the plumber is island-based. The crossing itself is about 45 to 50 minutes each way, and the booking is the part that governs the timing.
Can a jetter and camera come over?
Yes, on the vehicle barge. That is why island work is planned rather than immediate, and why a full description of the problem helps.
Does sandy soil change how drains behave?
Considerably. Sand moves into pits and flat runs, and on-site disposal areas behave differently in sand than in clay. A plumber who works the island already knows this.
Are there restrictions on digging?
There can be. Vehicle access permits apply on the island, large areas are national park and Quandamooka land, and the usual vegetation and koala considerations apply across the Redlands. The contractor confirms what a job needs before quoting, and uses Before You Dig Australia first.