You’ve received three quotes. One is 30% cheaper than the others. Should you take it?
It’s a situation almost every Sydney homeowner faces. And it’s a genuinely difficult one, because the answer isn’t simply “no, cheap is bad.” The real answer is: it depends on what that quote actually includes.
Some low quotes are honest and competitive. Many aren’t. The difference comes down to what’s been left out, what’s been assumed, and what gets added back once you’ve signed.
This guide walks you through exactly how to compare renovation quotes fairly, what cheap quotes typically leave out, and what the warning signs look like before you commit.
What Cheap Renovation Quotes Typically Leave Out
A quote isn’t just a price. It’s a statement of scope. And the fastest way to bring a quote down is to narrow that scope, quietly.
Here’s what often disappears in low-cost quotes.
Unforeseen site conditions
Older Sydney homes, particularly on the North Shore, regularly surprise you. Subfloor damage. Asbestos. Outdated wiring that needs upgrading before tiling can begin. A thorough pre-construction inspection reduces these surprises, but it does not eliminate them entirely.
When a builder has not accounted for the possibility of site conditions in their quote, any surprise becomes a variation, and variations get billed on top of the contract price. A fixed-price quote from a builder who has properly inspected the site is far more reliable than a low number based on assumptions.
Compliance and certification costs
Building work in NSW requires council approval, certificates of compliance, and in some cases inspections from private certifiers. These aren’t optional and they aren’t free.
Some quotes exclude these costs entirely. You only discover this after you’ve signed. For a mid-size bathroom renovation, compliance and certification can add $1,500-$4,000 to the final total.
Variation fees
How does the builder handle changes? Some contracts charge a flat documented fee per variation. Others charge time-and-materials at a premium rate once work is underway. If this isn’t spelled out in the quote, ask before you sign.
A builder competing on headline price often recovers their margin through variation charges. A $5,000 saving on the quote can disappear after two variations.
Warranty and rectification
A proper building contract in NSW includes a statutory warranty under the Home Building Act. You’re entitled to 2 years on minor defects and 6 years on structural defects. But a warranty is only as good as the builder’s ongoing ability to honour it, which is where the Home Building Compensation Fund (HBCF) becomes important.
For residential work over $20,000 in NSW, HBCF insurance is compulsory. You can verify a builder’s licence and check their insurance on the NSW Fair Trading licence register. LikeSilk Building holds licence 274849C.
Why Renovation Quotes Differ So Much
Three quotes for the same renovation that differ by 40% aren’t all looking at the same job. Here’s what drives that variation.
Different scope interpretations
If you haven’t provided detailed, finalised plans and a full specification, every builder is quoting their own interpretation of what you want. One builder assumes standard-format tiles. Another assumes large-format. One includes waterproofing to code. Another prices the minimum. Without detailed plans, you can’t get a like-for-like comparison. You’re comparing assumptions.
Provisional sums vs fixed prices
A provisional sum (PS) is a placeholder amount for something not yet specified, typically selections you haven’t made yet such as tiles, tapware, or a vanity. Some builders load their quotes with provisional sums to make the headline price look lower. The actual cost lands when you make your selections.
A fixed-price quote should have minimal provisional sums and a clear schedule of inclusions. If a quote is full of PS items, the final price is unknown. Read our guide to fixed-price vs cost-plus contracts for a fuller explanation of how each structure works and when each is appropriate.
Specification levels
The same renovation can cost $28,000 or $55,000 depending on the spec level chosen. Entry-level fittings vs mid-range vs premium makes a significant difference. If you’re comparing quotes, make sure each builder is pricing the same specification: the same tile sizes, the same fixtures, the same finishes. If they’re not, the comparison tells you nothing useful.
Overhead and business structure
A sole trader working from a ute has lower overhead than a builder running a proper business with insurance, staff, and systems. Lower overhead isn’t inherently a problem. But it often means less project management, less accountability, and less capacity to make things right when something goes wrong.
How to Compare Renovation Quotes Fairly
Most people compare quotes the wrong way: they look at the bottom line. Here’s a more useful approach.
Step 1: Confirm what’s included and excluded
Every quote should clearly list exclusions. If it doesn’t have an exclusions section, ask for one in writing. Common exclusions worth checking for:
- Demolition and disposal
- Plumbing and electrical rough-in
- Waterproofing
- Tiling labour (sometimes listed separately from materials)
- Council and certification fees
- Painting
- Blinds or joinery
Step 2: Align the specification before comparing
Before comparing prices, you need the same specification on paper. Send each builder the same document: the same plans, the same fixture schedule, the same finish level. Otherwise the comparison is meaningless.
Our bathroom renovation cost guide for Sydney and kitchen renovation cost guide include spec-level breakdowns that help you understand what’s reasonable at each price point.
Step 3: Check the payment schedule
A payment schedule tells you a lot about how a builder manages cash flow. Reasonable milestones: a deposit on signing, progress payments tied to completed stages such as slab, frame, lock-up, fitout, and a final payment on completion.
A builder asking for 50% upfront, or front-loading payments to stages not yet started, is a red flag. Under the NSW Home Building Act, for contracts over $20,000, the maximum deposit is 10%.
Step 4: Understand how variations are handled
Ask each builder directly: “How do you handle variations?” You want to hear: documented scope change, written approval before work proceeds, clear pricing. Vague answers or a builder who waves off the question is worth noting.
Step 5: Verify licence and insurance
Check the builder’s licence on the NSW Fair Trading public register. Verify they hold current HBCF insurance for the project value. This is a legal requirement for residential work in NSW over $20,000 and it protects you if something goes wrong.
For a fuller list of what to ask, see our post on questions to ask your builder before engaging.
Red Flags in a Renovation Quote
Some warning signs are obvious. Others are easy to miss if you don’t know what you’re looking for.
Vague or single-line scope descriptions “Bathroom renovation - supply and install” is not a quote. It’s a number with no accountability attached. You can’t hold a builder to something that isn’t defined. A proper quote itemises labour, materials, and scope by trade.
No exclusions section If a quote doesn’t tell you what’s excluded, everything is potentially included until it isn’t. Always ask for the exclusions list in writing.
No timeline or completion date If a builder can’t tell you when they’ll start and when they’ll finish, either they haven’t planned it or they’re slotting you around other jobs. Both create problems for your renovation.
Pressure to commit quickly “This price is only valid for 48 hours” is a sales tactic, not standard building practice. A legitimate builder gives you time to review. Pressure to sign fast is worth treating cautiously.
A large upfront deposit As noted above, over 10% upfront is outside what NSW law permits for contracts over $20,000. If a builder needs significantly more than that before starting, ask for a clear explanation.
No mention of HBCF insurance For contracts over $20,000, HBCF is compulsory. If a builder doesn’t reference it and can’t produce a certificate, that’s a problem worth resolving before you sign anything.
No written contract Verbal agreements and informal email chains are not building contracts. NSW law requires a written contract for residential building work over $5,000. If someone is reluctant to put the full scope in writing, that tells you something.
You can also review our building contract checklist to know exactly what a proper contract should include before you sign.
What a Quality Renovation Quote Looks Like
A comprehensive quote isn’t just a higher number. It’s a different level of detail, clarity, and accountability. Here’s what it should include:
- Itemised scope of work broken down by trade: demolition, plumbing, electrical, waterproofing, tiling, joinery, painting
- Schedule of inclusions listing specific products, materials, and brands where relevant
- Exclusions list so you know precisely what you’re responsible for
- Provisional sum schedule with clear identification of what’s fixed and what depends on selections
- Payment schedule tied to defined project milestones
- Variation process in writing, including how pricing and written approval works
- Timeline with start date, key milestones, and practical completion date
- Licence and insurance details including HBCF certificate number
If a quote is missing several of these, it isn’t a complete quote. It’s a headline number.
Cheap quote vs comprehensive quote: side by side
| Cheap quote | Comprehensive quote | |
|---|---|---|
| Headline price | Lower | Higher |
| Inclusions | Vague or minimal | Itemised by trade |
| Exclusions | None listed | Clearly stated |
| Contingency | Not included | 10-15% built in |
| Compliance costs | Often excluded | Included or clearly noted |
| Provisional sums | Many, priced low | Minimal, clearly flagged |
| Variation process | Unclear | Written and agreed upfront |
| HBCF insurance | May be absent | Included and verifiable |
| Final cost | Often exceeds estimate | Closer to quoted price |
The cheaper quote often ends up costing more. The question is whether you find that out before or after you’ve signed.
Sydney Renovation Costs: What to Actually Expect
Understanding market rates helps you spot quotes that are unrealistic in either direction. Here’s a general guide for Sydney, with North Shore context.
Bathroom renovations
A full bathroom renovation in Sydney typically costs:
- Entry level (standard spec, straightforward layout): $25,000-$35,000
- Mid-range (quality fittings, some layout changes): $35,000-$55,000
- Premium (high-spec fixtures, major reconfiguration, heritage or complex sites): $55,000-$80,000+
North Shore homes often sit in the mid-to-premium range. Older plumbing that needs upgrading, heritage overlays, and expectations around finish quality all contribute. See our full bathroom renovation cost guide for Sydney for a detailed breakdown by scope level, or use our bathroom renovation calculator to get an indicative figure for your project.
Kitchen renovations
A full kitchen renovation in Sydney typically costs:
- Entry level (flat-pack cabinetry, standard appliances, simple layout): $30,000-$45,000
- Mid-range (semi-custom joinery, quality appliances, some structural work): $45,000-$65,000
- Premium (custom cabinetry, premium appliances, layout reconfiguration): $65,000-$100,000+
Our kitchen renovation cost guide for Sydney covers this in detail, including what pushes cost up and where there is genuine flexibility without compromising the result.
If a quote comes in well below these ranges, it’s worth understanding why. Sometimes a lower quote reflects genuine efficiency. More often, something has been left out.
The Question Underneath the Quote
When you’re comparing renovation quotes, the real question isn’t “who’s cheapest.” It’s “who’s going to deliver what they’re promising, at the price we’ve agreed, in the time we’ve planned.”
That confidence comes from detail. From a builder who’s done the work upfront to understand your project properly, who’s documented what they’re building, and who stands behind it with the right licences, insurance, and contractual protections.
Master Builders NSW and the Housing Industry Association both publish guidance on what professional building practice looks like. The standards exist. The question is whether the builder you’re talking to meets them.
For a full breakdown of what your contract should contain, read understanding building contracts in Sydney and our guide to Home Building Compensation Fund coverage.
Get a Quote You Can Actually Compare
At LikeSilk Building, our quotes are itemised, fixed-price, and written in plain language. You’ll see exactly what’s included, what’s excluded, and how we handle anything that comes up during the build.
We don’t compete on being the cheapest. We compete on being the clearest and most reliable, so the price you’re quoted is as close as possible to the price you pay.
If you’re currently comparing quotes and want a clear, comprehensive one to hold the others against, get in touch. Or if you’d prefer to understand our process before we talk numbers, that’s a good place to start.
You can also download our free Renovation Blueprint, which covers the full renovation journey from planning to handover, including how to evaluate quotes and choose the right builder for your project.
