You have three drain relining quotes on the table. One is $4,200, one is $6,800, and one is $9,100. All three claim to solve the same drain problem. How do you work out which is the right choice?
Comparing relining quotes is not the same as comparing quotes for a commodity service. The materials matter enormously, the scope can differ significantly even for the same job, and the warranty and documentation that come with the job vary as much as the price. This guide explains how to read a relining quote and what questions to ask before you sign.
Quick answer (BLUF)
A detailed relining quote should itemise: CCTV inspection (pre and post), hydro-jet cleaning, liner supply and installation with specified liner type and length, lateral reinstatements, and the warranty terms. Quotes that bundle everything into a single line item make comparison impossible. The lowest price is not automatically the worst choice, but if it is significantly below market without a clear explanation, it is a red flag.
The core components of a relining quote
A transparent drain relining quote for a Central Coast residential job should include these elements:
1. CCTV inspection (pre-lining) The camera assessment that defines the scope of work. Some contractors include this in the job quote; others charge a separate assessment fee that is credited against the job if you proceed. Both approaches are legitimate, just confirm what applies.
2. Hydro-jet cleaning The pipe must be thoroughly cleaned before the liner is installed. This is a prerequisite, not an optional add-on. If a quote does not mention it, ask whether it is included.
3. Liner supply The liner material, type (felt or fibreglass), manufacturer, and length in metres. This is where significant quality variation exists. A quote should state which liner product is being used. If it says only “liner” with no further specification, ask.
4. Liner installation The labour and equipment cost for the installation. Method (inversion, pull-in-place, UV) should be noted. For UV cure, there is typically an equipment uplift.
5. Lateral reinstatement If the lined section has branch connections, these must be re-cut after the liner cures. The number of laterals being reinstated should be specified.
6. Post-lining CCTV inspection The quality assurance check after installation. Should produce a report and footage. Some quotes include this explicitly; others include it without separating the cost. Confirm it is included before signing.
7. Warranty documentation Not always shown as a line item but should be referenced, what warranty is being provided and at what period.
Why quotes vary: the main drivers
Liner quality and manufacturer
A liner from a recognised manufacturer with certified 50-year structural testing is more expensive than a generic import. The price difference per metre may be $30, $80/m. Over a 20 m run, that is $600, $1,600 in material cost. A quote that is $2,000 cheaper may simply be using cheaper materials.
Resin system
Epoxy resin is more expensive than some polyester alternatives. Epoxy has better long-term chemical resistance and structural performance for sewer applications. A quote using a lesser resin system will be cheaper in the short term.
Inclusion or exclusion of CCTV
Some quotes include pre and post CCTV as part of the job. Others quote the relining only, and CCTV is an additional fee. A quote that appears cheaper may be because CCTV has been excluded.
Access conditions
If the job requires establishing a new access point, or if the access is difficult (confined space, deep inspection shaft, working through a driveway), the labour cost is higher. A quote prepared by a contractor who has not assessed the site may have underestimated access complexity.
Liner length
Quotes should state the liner length in metres. A shorter liner may address the most obvious defects but leave unlined sections adjacent. Compare the total length being lined, not just the price.
Laterals
A pipe run with three lateral connections to reinstate after lining takes longer and costs more than the same run with no laterals. Quotes that do not count the laterals being reinstated are incomplete.
How to normalise a comparison
To compare three quotes meaningfully, create a simple table:
| Item | Quote A | Quote B | Quote C |
|---|---|---|---|
| Pre-lining CCTV | Included | $280 extra | Included |
| Hydro-jet cleaning | Included | Included | $350 extra |
| Liner type / manufacturer | Brawoliner, 18m | Unknown, 18m | Nu-Drain, 18m |
| Resin type | Epoxy | Not stated | Epoxy |
| Lateral reinstatements | 2 (stated) | Not mentioned | 2 (stated) |
| Post-lining CCTV | Included | Included | $250 extra |
| Workmanship warranty | 15 years written | 10 years verbal | 10 years written |
| Total | $6,800 | $4,200 | $9,100 |
When you add back the CCTV and jet charges for Quote B and note the missing lateral reinstatement detail, the adjusted cost difference narrows. The lower-cost quote may also be using an unspecified liner product, which is worth a direct question.
The per-metre price benchmark
A useful cross-check is the per-metre price. On the Central Coast, residential drain relining (100 mm sewer, standard access) ranges from approximately:
- Budget tier: $200, $280/m (check liner specification carefully)
- Mid market: $280, $380/m (standard quality, reputable contractor)
- Premium tier: $380, $500/m (specialist liner, complex access, UV cure)
A quote that comes in under $200/m needs explanation, likely either a very short run (minimum job charges inflate the per-metre figure on short jobs), a significantly discounted liner product, or an incomplete scope.
The question you must ask every contractor
Before accepting any quote, ask: “Can you provide the manufacturer’s product datasheet and the product warranty certificate for the liner you are proposing to use?”
A legitimate contractor using a quality product will answer this without hesitation. A contractor using a generic or non-certified product will hedge. The answer tells you more about the quote than any other single piece of information.
FAQs
Is the cheapest quote always the worst option?
Not always. A cheaper quote from an established contractor who explains why their price is lower (shorter required liner length after accurate assessment, efficient scheduling, lower overhead) can be excellent value. The cheapest quote from a contractor who cannot specify their liner product, has no written warranty, and did not visit the site before quoting is a different matter.
What should I do if two quotes are very close in price?
Review the warranty terms, the liner specification and the post-job CCTV inclusion. If all of those are equal, ask for references from recent Central Coast jobs and check the contractor’s licence on NSW Fair Trading. Contractor reputation and continuity matter.
Can I negotiate on a drain relining quote?
Politely, yes. If you have three quotes and the preferred contractor is slightly higher, you can share that you have a lower quote and ask whether they can match it or explain the difference. Legitimate contractors will explain what they include that others don’t. Avoid pushing purely on price, the cheapest outcome in relining is almost always a compromise on materials or process.
Should I pay a deposit before work starts?
A small deposit (10-20% of the job cost) is standard. Full payment before work commences is not standard and should be queried. Standard payment terms are deposit on booking, balance on completion.