If you are comparing renovation quotes in Sydney, the cheapest total on the last page is rarely the safest choice. Two builders can price the same drawings and still be allowing for very different work. One may include demolition, temporary protection and engineering coordination; another may leave those items as exclusions or provisional sums.
Start by checking that every builder priced the same scope
A useful quote comparison starts before the prices arrive. Give each builder the same architectural drawings, engineering information, specification, finishes schedule and known site reports. If one builder prices from detailed documents and another prices from a short sketch, the totals are not directly comparable.
For older homes around Epping, Beecroft, Eastwood and Ryde, ask whether the quote allows for investigation of existing structure, services and moisture. A pre-construction inspection cannot reveal every concealed condition, but it can reduce avoidable assumptions. Our home renovation service explains how planning, approvals and construction can be coordinated as one process.
Renovation quote checklist
- Demolition: removal, loading, tipping fees and protection of retained areas.
- Structure: beams, posts, temporary propping, engineering inspections and making good.
- Services: electrical, plumbing, drainage, heating or cooling upgrades and switchboard capacity.
- Approvals: DA or CDC documentation, certifier fees, inspections and council-related charges.
- Finishes: exact brands, models, quantities, installation and realistic supply allowances.
- Site establishment: fencing, amenities, access protection, scaffolding and waste handling.
- External work: drainage, paths, landscaping repairs and connections disturbed by construction.
- GST: confirm whether every displayed figure includes GST.
Understand fixed prices, allowances and provisional sums
A fixed-price item should be based on a defined scope. A prime cost allowance generally relates to an item you will select, while a provisional sum is an estimate for work that cannot yet be priced accurately. Neither is automatically a problem. The risk appears when allowances are unrealistically low or when too much of the project remains undefined.
| Quote item | What to ask | Why it matters |
|---|---|---|
| Prime cost item | What product level and quantity has been allowed? | A low allowance can make the initial quote look cheaper. |
| Provisional sum | What information is missing and when will it be resolved? | The final cost can move after the work is investigated. |
| Exclusion | Who will supply, coordinate and pay for it? | Excluded work still has to be completed by someone. |
| Variation | How are labour, materials, overheads and approval recorded? | A clear process reduces disputes later. |
Look closely at exclusions
Exclusions deserve as much attention as inclusions. Common renovation exclusions include asbestos removal, upgrades required after opening walls, rock excavation, authority charges, temporary accommodation, loose furniture and landscaping. Ask for exclusions in writing and add the likely cost of owner-supplied items to your comparison.
If asbestos may be present, use competent professionals and follow current NSW requirements. SafeWork NSW provides official guidance on asbestos safety and licensed removal. Do not rely on a visual guess before demolition.
Check the construction program, not just the price
Ask when the builder can start, how long the work is expected to take, what decisions the owner must make, and which events may extend the program. If you plan to remain in the home, discuss dust separation, service shutdowns, bathroom and kitchen access, working hours and safe separation from the construction zone.
Projects that increase floor area may need a different approval path and more extensive coordination. Read about home extensions and strata work, or compare the practical issues in our guide to renovating an older Eastwood home.
Confirm who is actually responsible
The quote should identify the contracting party, the proposed scope, payment stages and the people responsible for supervision and communication. Verify the builder’s licence independently through NSW Fair Trading and review the proposed residential building contract before signing. NSW Fair Trading explains current requirements for building and renovation contracts.
Allow a realistic contingency
Renovations involve existing buildings, and concealed conditions can be discovered after work starts. Your contingency should reflect the age of the home, completeness of documentation, access, structural changes and how much invasive investigation has already occurred. It is separate from the builder’s price and remains under the owner’s control.
Any price ranges used during early planning are indicative only. Published sources often use different definitions of floor area, finishes, professional fees and site work. Confirm whether GST, design, engineering, approvals, asbestos, service upgrades, external works and temporary accommodation are included. Every property differs, and EW Homes needs to inspect the home and understand the documents before providing a project-specific quote.
Questions to ask before choosing a renovation builder
- Have you priced the full drawing and specification set?
- Which items are provisional, excluded or owner supplied?
- What investigation is recommended before the contract?
- How will changes and concealed conditions be documented?
- Who coordinates the certifier, engineer and inspections?
- What protection is included for the parts of the home being retained?
- What are the payment stages and what evidence supports each claim?
Frequently asked questions
Should I choose the lowest renovation quote?
Not automatically. First normalise the scope, allowances, exclusions, GST and likely owner costs. A higher but more complete quote may produce a more reliable budget.
How many renovation quotes should I obtain?
Enough to understand the market and compare capable builders, but quality matters more than a fixed number. Detailed documents and clear answers usually reveal more than collecting many loosely prepared estimates.
Can a builder give a fixed price before engineering is complete?
Some items may be fixed, but structural work based on incomplete engineering is likely to involve assumptions or allowances. Ask the builder to identify them clearly.
What should I do if two quotes are far apart?
Compare them line by line. Look for missing work, low allowances, different finish levels and different interpretations of the drawings. Ask both builders to clarify in writing.
Discuss your renovation before you compare the final numbers
If you are planning work in Epping, Beecroft, Eastwood, Marsfield, Carlingford or Ryde, EW Homes can review your existing home, priorities, documents and practical constraints. Contact EW Homes to discuss the next sensible step before you commit to a scope that may be incomplete.