Can I lift the boundary shaft cap myself to check for water?

Council's advice is to have a licensed plumber inspect the boundary shaft. If you look yourself, take care with the cap and do not put your hands or tools into the riser. A photo of what you can see from above helps a plumber judge the likely cause before they arrive.

Will Council refund me if I already paid a plumber and the blockage was theirs?

Council's page says the plumber must invoice Council for the covered first hour. Ask your plumber to send that invoice to Council rather than charging you for it, and do this before the work is billed. Council's page does not describe a refund to owners, so contact Council directly if you have already paid.

Does Council fix tree roots in my private sewer line?

No. Roots in the line between the house and the inspection shaft are on the owner's side, so clearing them and repairing any damaged pipe is the owner's cost. If the roots belong to a street tree, ask Council how it handles that situation before work starts.

How do I find my sewer inspection shaft?

Start with the sewer service diagram for the property, which shows where the private pipes run. Look along the front or side boundary for a small capped riser. If it has been covered by a garden bed or paving, a plumber can locate it, but Council will not pay for that time.

Who do I call first if sewage comes up through the shower?

Stop using water in the house, then arrange a licensed plumber to check the boundary shaft, since that decides who clears it. If the shaft is full, Council can be called to log the blockage. Keep children and pets away from any spill and wash any area sewage has touched.

Blocked sewer in Byron Shire: who pays, owner or Council

In Byron Shire the property owner looks after the sewer pipe from the house to the sewer inspection shaft, including the overflow relief gully, and Council looks after everything from the bottom of that shaft to the sewer main. A licensed plumber opens the shaft: if it is holding water, the blockage is in Council’s section and Council clears it; if it is empty while the house drains are backing up, the blockage is on your side and clearing it is your cost.

Those rules come from Byron Shire Council’s blocked sewers page. This guide explains how they play out on the day, what Council does and does not pay, and the cases where the answer is different. Byron Bay Plumber only passes enquiries on; the plumbing business that takes yours does the inspection, so the about page is worth a look if you want to know how that works.

Where does the owner’s pipe end and Council’s begin?

Section of pipe	Who looks after it	Notes
Fixtures inside the house and the pipes under it	Owner	Toilets, showers, basins, sinks, laundry tubs
Overflow relief gully in the yard	Owner	Part of the private drain, even though it is outside
Private sewer line from the house to the boundary	Owner	Usually runs under the yard to the inspection shaft
Sewer inspection shaft (boundary shaft, riser or inspection point)	Owner keeps it accessible	The point where private drainage meets Council’s system
From the bottom of the shaft to the sewer main	Council	Includes Council’s connection and the main itself

The shaft is the dividing line, which is why the first job on any suspected sewer blockage is finding it and lifting the cap.

How does the boundary shaft test work?

A licensed plumber locates the sewer inspection shaft, usually near the front or side boundary.
They open the cap and look down the riser.
Shaft holding water: sewage is backing up from beyond the shaft, so the blockage sits in Council’s section. You, a tenant or the plumber can call Council to log it, and Council does the repair.
Shaft empty, house still blocked: the line downstream is flowing, so the blockage is between the house and the shaft. The owner arranges and pays for the clear.
If the fault is on your side, the plumber moves on to clearing it, and may suggest a camera if it keeps coming back.

The test only works if the plumber can get to the shaft. Council says owners must keep the inspection point easy to reach, so a riser buried under a garden bed, covered by decking or hidden under pavers slows the job down and adds to your bill.

What does Council pay for when the blockage is theirs?

When the blockage turns out to be in Council’s section, Council pays for the first hour of the plumber’s service fee, up to a set cap, to cover the cost of working out where the blockage is. Council’s page gives the current cap.

Council does not pay for:

time spent locating a hidden or buried inspection point;
after-hours charges;
call-out fees;
any other work the plumber carries out.

The plumber has to invoice Council directly to be paid for the covered part. Ask the plumber before they start whether they will bill Council for the first hour, and get them to show you the open shaft or take a photo so the result is on record. Anything beyond Council’s share, such as a call-out fee, is between you and the plumber. Ask how they will charge it before they arrive.

What stays the owner’s responsibility?

Most blocked drains are on the private side. Common causes include tree roots finding a joint in an older pipe, wet wipes and nappies, fat poured down the kitchen sink, and sand or silt washed into a damaged line. Clearing those is the owner’s job, and so is any repair to a cracked or root-damaged pipe found on the way.

The owner also looks after the overflow relief gully. Its job is to let sewage spill outside, rather than up through a shower or toilet, if the drain surcharges. Building Commission NSW’s overflow relief gully advisory note sets the height rules from AS/NZS 3500.2: the top of the gully must be at least 150 mm below the lowest connected fixture and at least 75 mm above the finished ground. Gardens built up around the gully, or paving laid over it, can undo those heights and turn a yard spill into an indoor one.

For how a plumber clears a private drain, the methods used and when a camera is worth paying for, see the blocked drains page. Indicative drain prices are on the Byron Bay plumbing cost guide.

Who can report a Council blockage?

Council accepts a report from the owner, a tenant or the plumber. In practice the plumber who has just opened the shaft is often best placed to call, since they can describe what they saw. If you are a tenant, tell your agent or landlord as well, because the owner may be billed for any private-side work and will want to know about it.

What if the property is a holiday let or rental?

The same dividing line applies. The difference is who arranges the plumber. A tenant or guest should report a backing-up toilet to the agent or host at once, and the owner or manager then books the plumber. Leave a written note for cleaners and managers showing where the inspection shaft and overflow relief gully are. When a blockage happens on a changeover day, the plumber then does not lose time finding the shaft, which Council will not pay for.

Which cases follow different rules?

Septic or treatment system. If the house is not connected to Council sewer, there is no Council section and no boundary shaft test. Everything from the house to the disposal area belongs to the owner. The septic and on-site sewage page covers those systems.
Ballina Shire. Lennox Head and Ballina are in Ballina Shire, and Ballina Shire Council sets its own rules. The Byron Shire rules on this page do not automatically apply there, so check Ballina Shire Council’s own guidance before assuming Council will pay.
Strata and shared drains. Where several dwellings share a private line before it reaches the shaft, check with the strata manager or the other owners before booking, because a shared section may be arranged and billed differently.
A private pump before the shaft. If waste from your house is pumped up to the sewer line, ask Council who looks after each part of that arrangement at your address.

Council’s role here comes from its work as the sewer operator for the Shire. Byron Shire Council runs four sewage treatment plants, 80 pump stations and about 252 km of sewer mains, according to its water supply page. A blockage in that network is its job to fix; a blockage in your yard is yours.

How does this play out in Byron Bay town?

On a small town block that has been paved, decked or landscaped over the years, the shaft is easy to lose. If you do not know where your inspection shaft is, find it before you need it. The sewer service diagram for the property may show it, and the Byron Bay area page describes the town and its suburbs. Plumbing work on the sewer line needs a NSW licensed plumber or drainer, and a quick check of their licence before work starts protects you if something goes wrong.

Next step: describe what the shaft is showing

If you have already lifted the cap on the inspection shaft, say whether it is holding water and attach a photo. If you have not, say whether you know where it is and what covers it. List which fixtures are backing up, whether the overflow relief gully has spilled, and whether the house is a rental or holiday let. Then send a blocked sewer enquiry and a provider can tell you whether it sounds like your section or Council’s before they visit.

Send a job enquiry

Blocked sewer in Byron Shire: owner or Council?