No-dig pipe repair on the Lower North Shore.
Cracked or damaged pipe repaired in place in Neutral Bay — relining a stack or a shared line without opening walls, slabs or common areas.
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Neutral Bay is 80.2% apartments across 5,619 dwellings, in buildings ranging from Arts and Crafts houses through interwar walk-ups to modern towers, frequently on the same street. Where a stack has failed, replacing it means opening a riser through occupied floors. Lining it means a single access point and a building that carries on functioning — which is usually what decides whether an owners corporation approves the work at all.
A build-up at the base of a shared stack with the symptom appearing in whichever unit sits lowest. Stack material varies sharply between adjacent buildings, from interwar to modern.
Because opening up a building is a different order of disruption. This is the part of a drainage repair people do not price until an excavator is already on site.
Occupied residential floors, common areas and the limited garden planting of a dense suburb. The cost of a dig job here is measured in disruption more than in soil.
A liner goes in through an opening that already exists. Nothing above the pipe has to move.
About 1.5 kilometres north of the CBD across 1.6 square kilometres, falling towards the harbour. Density rather than terrain is what makes conventional repair awkward.
Neutral Bay sits in the North Sydney Council, postcode 2089.
Local figures sourced from: ABS 2021 Census QuickStats — Neutral Bay · Neutral Bay, New South Wales — Wikipedia
Stack material and age vary sharply between adjacent buildings — interwar walk-ups and modern towers behave completely differently under the same load, and the survey establishes which before a method is chosen.
No trench, no spoil, and nothing above the pipe disturbed. The whole job runs through an existing access point.
The line is inspected end to end so the damage is located and measured. Nothing is quoted from the surface.
Roots are cut out and the pipe wall is jetted back to bare material — a liner will not bond to a coated pipe.
A resin-saturated liner is drawn into position through an existing access point and inflated against the host pipe.
The resin hardens in hours rather than days, forming a new pipe inside the old one with no joints for roots to re-enter.
Any branch lines are cut back open robotically, and a final camera pass confirms the result.
Not every damaged pipe should be relined, and we will say so. These are the cases where it genuinely wins here.
No riser opened and no lots vacated.
A liner unifies a run that has been patched piecemeal.
Less disruption is an easier proposal to pass.
Relining costs more per metre than excavation. It is usually cheaper overall, and this is why:
| Dig and replace | Relining | |
|---|---|---|
| Excavation | Trench the full length, remove and replace the pipe, backfill | None — the work runs through an existing access point |
| What comes up | Lawn, garden, paving, driveway or slab above the line | Nothing |
| Time on site | Days on a long or deep run | Usually one day for a typical run |
| Reinstatement | Priced separately and often the larger half of the bill | Not applicable |
| Result | New pipe, with joints | A jointless liner inside the host pipe |
| Design life | Depends on material and bedding | 50 years on a correctly installed liner |
The per-metre comparison is the one that misleads. Excavation quotes routinely exclude spoil removal and reinstatement, which is where a dig job gets expensive — and on some properties the reinstatement is simply not possible at any price.
These are typical ranges across the Sydney market — not Voyager’s price list, but a realistic yardstick to judge any quote against, including ours.
| Pipe relining, per lineal metre | $450 – $800 |
| Pipe relining, typical whole job | $4,000 – $10,000 |
| Patch repair, single damaged section | $1,500 – $3,000 |
| Junction reinstatement | $300 – $600 |
| Excavate and replace, per metre | $300 – $600 |
| Driveway reinstatement after a dig job, per sqm | $100 – $200 |
| CCTV drain inspection | $250 – $550 |
| Cutting tree roots from a line | $400 – $1,200 |
Voyager prices by the job, not by the hour, so the number you approve is the number you pay. A camera survey happens before any figure is given — a quote for relining that has not looked down the pipe is a guess.
Most Neutral Bay properties that ring about relining need a camera first. We will tell you straight — including when clearing the line is the whole job.
A correctly installed liner carries a 50-year design life, and it cures in hours rather than days — so the property is back in normal use the same week rather than the same month.
A less disruptive proposal is an easier one to get approved, which in an 80.2% apartment suburb is a practical advantage as much as a technical one.
Roots come back through joints. A liner has none.
Voyager covers the whole Lower North Shore. These are the closest to Neutral Bay:
No. That is the whole point of it. The liner is drawn in through an existing access point — usually an inspection opening or shaft already on the property — and cured in place against the old pipe. It means no riser opened through occupied floors and no residents displaced while the work happens.
Across the Sydney market, relining runs about $450–$800 per lineal metre, with a typical whole job landing between $4,000 and $10,000 and a single-section patch around $1,500–$3,000. Those are market ranges rather than Voyager’s price list. Building access and owners corporation approval, which are usually on the critical path. The installation is quick; getting agreement to it is what takes time.
Per metre, no — excavation is cheaper per metre. Overall it usually is. A dig figure in a building also has to carry access through occupied lots, common areas out of use and works approvals — none of which appear on the per-metre rate. On some properties the reinstatement is not possible at any price, which settles it entirely.
A correctly installed liner carries a 50-year design life. It outlasts what it replaced because it has no joints along its length — and joints are where roots get in, where ground movement opens a gap, and where old earthenware fails first. For an owners corporation that is the relevant number — one authorised job against another decade of reactive callouts on the same line.
A typical residential run is a single day on site, and the resin cures in hours rather than days. Coordinating building access and notifying affected lots usually takes longer than the installation does.
Most can, but not all — and we will say so rather than sell you something that will not work. A pipe that has collapsed completely, or lost so much of its shape that there is nothing left to line against, needs replacing. In Neutral Bay the host pipe is usually a good candidate: a build-up at the base of a shared stack with the symptom appearing in whichever unit sits lowest. Stack material varies sharply between adjacent buildings, from interwar to modern.
Yes — that is one of the main reasons it is used in buildings like Neutral Bay’s. Replacing a stack means opening the riser through occupied floors; lining it means a single access point and a building that keeps functioning. In a suburb that is 80.2% apartments, that difference is often what decides whether the work gets approved at all.
The owners corporation, where the line is common property — which generally means any pipe serving more than one lot. We deal with the strata or building manager directly and provide the camera footage they need to approve the work. Where the line serves only your lot, it is your decision.
Camera survey first, a fixed price agreed before the work starts, and no excavation.
Voyager Plumbing · NSW Contractor Licence 476657C
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Page reviewed and updated 20 August 2026
