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N NeedATrade
Trade 27 of 33Updated June 2026

A research dossier · 260 trade-region files across 8 states & territories · HBC + DBI rules verified per state

Hiring a Renovation Builder
is where the scope creeps you to NCAT.

Renovations sit between handyman jobs and luxury custom builds — and they have the worst contracts. The high-risk operator renovation builder quotes you for the visible work + writes "variations to be agreed on the day" into the scope. Six months in, you've approved 14 variations + the budget is 40% over, the bathroom isn't finished + you're three months past the original handover date.

10%

Legal maximum deposit. Same as new builds.

25–40%

Budget blow-out common when variations aren't capped.

5–8

Sub-trades a typical kitchen reno coordinates.

In a hurry? Start here

I've got quotes

Compare them properly

Most renovation builder quotes price different scopes. See what a real quote contains, line by line.

I need someone now

Handle it urgently

Make-safe price first, full quote second — and verify the licence before anyone starts.

Is this one legit?

Verify this tradie

The free 60-second routine: licence, insurance, ABN, history — before you pay a deposit.

My state

Check your state rules

Licensing, deposit caps and the common gotcha for your state and territory.

Or grab the four printable buyer checklists →

90-second briefing

Read this first

Before you hire a renovation builder, know this.

  1. 1

    Renovation scope creep is the number-one budget killer — lock the scope and a variation clause first.

  2. 2

    Deposits are capped by state law — anything above the cap is illegal.

  3. 3

    You are owed insurance-backed home-warranty cover above the state threshold.

  4. 4

    Confirm who manages the trades, the build sequence, and the practical-completion definition.

  5. 5

    Get the licence number, ABN, certificate of currency and warranty in writing before any deposit.

How this page was built

A research dossier, not a referral page.

Sources

Reddit + Whirlpool, ProductReview, Building Commission NSW + HBC, QBCC, BPC, HIA/MBA standard contracts.

Verification

Pricing cross-checked across NSW, QLD, VIC current renos. Deposit + progress payment rules verified per state statute.

Funding

No builder pays for placement. No referral fees. Funded by the supply-side flyer service at tradies.needatrade.com.au/flyers/.

Before we start

Renovations live or die on the
variation rule.

Every renovation has hidden defects. Pull off the kitchen splashback + you find water damage. Open the bathroom wall + you find old pipes that don't meet code. Lift the floorboards + you find rotted joists. The question isn't whether variations will happen — it's what the rule is when they do.

The 10 questions below pull the variation rule into the open before you sign. A working renovation builder caps the variations, names the trigger conditions, and writes the rule on the contract. A quote-trap operator says "we'll see what we find" — and you sign up to whatever happens.

A renovation contract without written variation rules is a blank cheque. Don't sign it.

01

How much should it really cost?

Seven lines a real renovation quote shows

  • 1Demolition. What gets removed + how. Tip fees + asbestos contingency.
  • 2Structural work. If walls move + lintels + framing. Engineering certificate.
  • 3Sub-trades. Sparky, plumber, tiler, plasterer, painter, cabinet-maker — each named + scoped.
  • 4Materials + fixtures. Inclusions list with brand + model + supplier. PC + provisional sums spelled out.
  • 5Variation rules. What's open. What triggers a re-quote. $ ceiling on open items. Written.
  • 6Progress payments. Tied to milestones (demo done / structural done / lock-up / final fix / handover). Written.
  • 7Contingency. 10–15% recommended on top of quoted scope. Anyone quoting without contingency is hiding it elsewhere.

Indicative ranges

AU 2026

Bathroom reno (mid-tier · fixtures + tile)$25k – $45k
Bathroom reno (premium · stone + double vanity)$45k – $85k
Kitchen reno (mid-tier · same footprint)$30k – $55k
Kitchen reno (premium · stone + custom)$55k – $120k
Extension (20m² · single-storey · roughed)$80k – $180k
Full house reno (150m² · mid-tier)$400k – $900k+
Indicative. Heritage, steep block, structural changes, premium fixtures = upper end. Plus 10–15% contingency.

Ask this, exactly

Save · share · screenshot

"Can you send the inclusions list, the PC / provisional sums with $ caps, the variation rule with $ ceiling, and the progress-payment schedule — all in writing?"

02

How to tell a real one from a cowboy.

Red flags — in order of how often you'll meet them

  • !

    "Variations to be agreed on the day"

    The single most predictive line of a budget blow-out. A working renovation builder caps the variations in writing.

  • !

    Deposit over the state cap

    Same statutory cap as new builds — 10% in NSW, with VIC and QLD set by job value. Anything over your state's cap is illegal.

  • !

    No HBC / Home Warranty / DBI

    Above state thresholds, the certificate must exist in your name before deposit. No certificate = your money has no statutory protection.

  • !

    No sub-trade names

    "My usual sparky" + "my regular tiler" without names = you don't know who's touching your house, and you can't verify their licences.

  • !

    Vague progress-payment schedule

    "Progress payments as work proceeds" is a blank cheque. Milestones must be specific: demo done = payment 1, structural done = payment 2, etc.

The verification routine — 30 minutes, free

  1. ✓
    Builder's licence + class. The right class for residential renovation.
  2. ✓
    HBC / Home Warranty / DBI issued in your name before deposit.
  3. ✓
    ABN + ACN + ASIC. Phoenix-company check. Director history.
  4. ✓
    Three recent reference renos. Drive past one. Call one owner.
  5. ✓
    Independent solicitor reviews the contract. Yours, not the builder's.

Ask this, exactly

"Can you send your licence, HBC/HW/DBI policy in my name, three reference renos, and the named sub-trades + their licences?"

03

What certificate should you receive?

Renovation Builder — licensing & compliance by state

Choose your state:
NSW $5,000

Regulator

Building Commission NSW

Common gotcha

Home Building Compensation (HBC) cover where contract >$20,000

VIC $10,000

Regulator

Building and Plumbing Commission (BPC, formerly VBA)

Common gotcha

Domestic Building Insurance (DBI) where contract >$16,000

QLD $3,300

Regulator

QBCC

Common gotcha

QBCC Home Warranty Scheme (QHWS) where work >$3,300

WA $20,000

Regulator

Building Services Board (Building and Energy)

Common gotcha

Home Indemnity Insurance (HII) where work >$20,000

SA $20,000

Regulator

Consumer and Business Services (CBS)

Common gotcha

Building Indemnity Insurance (BII) where contract ≥$20,000 (raised from $12,000 on 10 Nov 2025)

ACT $85,000

Regulator

Construction Occupations Registrar (Access Canberra)

Common gotcha

Residential building work insurance — min $85,000/dwelling, before building commencement notice

NT $200,000

Regulator

Building Practitioners Board

Common gotcha

Cyclonic Region C wind design (AS/NZS 1170.2) applies to coastal NT incl. Darwin

TAS Licensed

Regulator

CBOS (Consumer, Building and Occupational Services)

Common gotcha

No mandatory home-warranty insurance in TAS

Half-time

No variation cap. No HBC. No deal.

Quote anatomy, the cowboy test, the certificates. The first three sort the working renovation builders from the scope-creep operators. The next seven are how working renovators tell themselves apart — and how you avoid NCAT.

04

When can they actually start?

Renovation builders typically 6–16 weeks out. Permits + insurance certificates add 4–8 weeks upfront. The "I can start next month" builder is either the right operator with a cancellation, or the wrong operator with no other work.

Real start.

Conditional on permits + HBC + contract. 8–16 weeks from first contact realistic.

Real duration.

Bathroom: 4–6 weeks. Kitchen: 6–10 weeks. Extension: 12–24 weeks. Full house: 6–12 months.

Liquidated damages.

Contract specifies what the builder owes per day if they're late through their own fault. Working builders accept it.

Ask this, exactly

"What's a realistic duration for this scope, and what's the liquidated damages clause if you're late through your own fault?"

05

What happens next, step by step.

  1. 1Phase

    Design + scope

    Either you supply drawings or design-build option. Inclusions list developed.

  2. 2Phase

    Tender + selection

    Three builders quote the same documents. Compare on like-for-like, not headline price.

  3. 3Phase

    Contract + HBC + 10% deposit

    Solicitor reviews. HBC / DBI certificate issued. Variation rules + progress-payment schedule in writing.

  4. 4Phase

    Pre-start + permits

    CDC / DA / building permit lodged. Final selections (tile / paint / fittings). Pre-start meeting.

  5. 5Phase

    Demo + structural + sub-trades

    Phased work. Each progress claim signed off by you before payment. Variations in writing before they're done.

  6. 6Phase

    Defects + handover

    Pre-handover walkthrough. Defects list. 13-week defects period. Final 5% withheld until rectified.

06

Design-build or build-only?

Option A · single point of contact

Design-build

Builder takes you from concept through build. Architect or designer is part of the builder's team or sub-contracted.

Right when: no architect engaged, want one point of contact, prefer integrated design + cost discipline.

Wrong when: you want independent design check + competitive build pricing.

Option B · tendered

Build-only

Architect designs. Builder tenders. Builder constructs to the architect's drawings. Two professionals coordinate.

Right when: architect-led project, want competitive build tender, premium/complex job.

Wrong when: simple bathroom / kitchen — design-build often more efficient.

07

Warranty — same five layers as a new build.

  1. Layer 01

    Statutory structural

    6 years (NSW · VIC) / 6.5 years (QLD) on structural work.

  2. Layer 02

    Statutory non-structural

    2 years (NSW · VIC) / overlapping with QLD cover.

  3. Layer 03

    Defects period

    Builder's own — 13 weeks. Final 5% withheld.

  4. Layer 04

    HBC / HW / DBI

    Insurance-backed cover if builder disappears.

  5. Layer 05

    Manufacturer warranties

    Tile, fixtures, appliances, fittings — each separately warranted.

Ask this, exactly

"Could you list the five warranty layers + the 5% defects retention rule in writing?"

08

Hidden defects in old houses.

The mid-job variation lives in the wall cavities. Termite damage, water rot, lead paint, asbestos, old pipework that doesn't meet code — discovered during demolition or rough-in.

  • Pre-1990 houses

    Asbestos in eaves, vinyl, wall sheeting. Licensed removal required.

  • Pre-1970 houses

    Lead paint. Old plumbing. Sometimes knob-and-tube electrical. Heritage tile.

  • Pre-1940 houses

    Specialist trade. Original-section timber, lath + plaster, historic plumbing. Standard renovation builder often not the right operator.

  • Heritage / Conservation

    Council heritage consultant approval. Original-material match for some surfaces. Adds months.

Ask this, exactly

"What's your variation rule + $ ceiling if you find termite / asbestos / lead paint mid-demo?"

09

Edge cases — get a second opinion for…

  • Heritage Conservation Area

    Heritage consultant approval. Original-material match. Adds 3–6 months.

  • Strata / townhouse

    Owners corporation approval. Common-property impact. Many strata schemes restrict renovations entirely.

  • Structural changes (load-bearing)

    Engineer's report + structural builder required. Renovation builder coordinates but engineer signs off.

  • Asbestos discovery mid-demo

    Licensed removal + disposal. Halt work. Specialist trade. Variation rule applies.

  • Wet area renovation

    Bathroom + ensuite + laundry — waterproofing membrane + AS 3740 compliance. Verify in inclusions list.

  • Living-while-renovating

    Dust + noise + access management. Some builders prefer empty house — discuss in advance.

  • Stages over multiple years

    Phased renovation with budget gaps. Each phase a separate contract — not "we'll get back to that bit".

  • Owner-supplied materials

    You supply fixtures + finishes. Allocates risk + warranty differently. Get in writing.

  • Pre-purchase renovation

    Don't exchange contracts on the house until renovation feasibility + cost is established. Many "this house has potential" disasters.

10

After they leave.

Same as a new build: 13-week defects period, 6-year structural clock, warranty pack at handover. Plus a small post-handover scope unique to renovations — settling cracks, paint touch-ups, drawer alignment as new joinery acclimates.

13-week defects period.

Walkthrough at handover. Defects list. Final 5% retention until closed out.

Settling-crack window.

Plaster cracks at junction lines in first 12 months. Working renovator returns for touch-up.

Warranty pack.

Folder of manufacturer warranties + sub-trade contact details + compliance certificates.

12-month walkthrough.

Optional. Mark of a real operator. Settling defects caught + closed.

Ask this, exactly

"What's your defects period + the 12-month walkthrough rule + the warranty pack contents?"

Asbestos contingency

If the work may disturb older roofing, eaves, wall linings, insulation, cladding or wet-area materials, ask how asbestos risk will be identified before work starts. Licensed asbestos removal requirements vary by material type, quantity and state. Do not rely on a verbal “it should be fine” answer for older homes.

If you suspect asbestos, do not disturb it. Only a licensed asbestos removalist should handle friable asbestos or quantities above the exempt threshold in your state.

If you've read this far

A renovation builder who caps the variation rule in writing before deposit is not a unicorn. It's the bar.

The verification routine below is how you confirm any renovation builder you find — their licence number, insurance certificate, ABN, specialist endorsements, and references — before you sign or pay a deposit. We don't introduce, list or recommend specific tradies. No paid placement.

✓ No referral fees✓ Verified means all 10✓ No spam
Verify any renovation builder's licence 60-second routine · 6 free checks

Editorial position: we don't list, rank or recommend tradies on this site.
The separate operator platform — members.needatrade.com.au — opens later this year.

The toolkit

Use these before you sign.

The four components below apply to every Australian trade contract. The trade-specific sections above add the layer on top.

78 homeowner quotes · Reg State trade regulator + work-safety regulator · AS AS 1684 · NCC · 9 operator quotes · Last reviewed June 2026

Quote anatomy

What a real quote should contain

01

Operator + ABN

Full legal name + active 11-digit ABN

Verify on the Australian Business Register before paying any deposit. If the ABN isn't active, the contract has no enforceable counterparty.

02

State trade licence

Licence number + class on the quote

Cross-check on the relevant state regulator (linked in the glossary licence-check section). Confirms they can legally do the work.

03

Public liability insurance

$10–20 million cover, still current (not expired)

This is what pays if they damage your home — or a neighbour's — or someone is injured during the job. Ask them to email you the insurance certificate; "I'm covered, mate" is not proof.

04

Workers' insurance

In place if they bring any workers onto your property

If a worker is hurt on your property and the operator has no workers' insurance, you can be the one left liable. A genuine sole trader with no employees may not need it — just ask.

05

Itemised scope of work

What's included, what's not, line by line

"Standard installation" means nothing in court. Specific scope items are what get enforced.

06

Materials specification

Brand, grade, quantity, AS standard where applicable

Prevents the "we used what was on the truck" substitution that turns up under failure inspections.

07

Variations clause

How changes get priced + agreed, in writing

No written variation = unenforceable. Verbal "we'll work it out" is how budgets blow out by 40%.

08

Deposit + progress

Within your state's legal cap (e.g. NSW 10%; VIC 10%/5% by threshold; QLD tiered 20%/10%/5% by job value)

Above-cap deposits are illegal. Caps differ by state — check your state's current regulator guidance. Progress payments should align with completed stages, not arbitrary dates.

09

Warranty terms

Workmanship period + manufacturer warranty pass-through

Statutory warranty applies regardless, but written terms accelerate enforcement.

10

Completion definition

What "practical completion" means for this job

Triggers final payment + starts the defects liability period.

11

Dispute path

Named regulator/tribunal for disputes (e.g. NCAT, VCAT, QCAT)

Knowing the path before signing makes you a less attractive target for a dispute.

If a quote you receive is missing any of these, ask for them before you sign or pay a deposit.

The working operator vs the cowboy

Where
✓ Working operator
✗ Cowboy

Quote

Written, itemised, with named scope + exclusions. Numbered + dated.

A number on a text. "I'll do it for $X."

Licence

Licence number on the quote; matches the name on the state register.

"I'll send the licence later." Never does.

Insurance

Emails you the insurance certificate the same day you ask.

"I'm insured, mate." Never actually sends the certificate.

Deposit

Within statutory limit. Held in their account, receipted.

Asks for cash up front. Above the legal limit.

Variations

Written. Cost + time impact. You sign before work changes.

Verbal "we'll sort it out". Surprise invoice at the end.

Warranty

Written workmanship period. Manufacturer cert handed over.

"My word's my warranty." No paper.

References

Three recent jobs with photos + contact for past clients.

"All my reviews are on Google."

Clean-up

Final clean defined in scope. Photos taken at handover.

Site left messy. Promises to "come back tomorrow".

Ask this, exactly

Could you send your state trade licence number, current Certificate of Currency for public liability, and ABN before I confirm — and please put the itemised scope, deposit terms, and variation clause in writing too?

Send via SMS or email before booking. A working operator replies the same day with all of it attached. A cowboy stalls.

Deposit checklist

Before you pay a renovation builder deposit, collect these

  • Licence number

    State trade licence + class, printed on the quote. Verified on the regulator register.

  • ABN

    Active 11-digit ABN, entity name matching the licence. Checked on abr.business.gov.au.

  • Certificate of currency

    Current public-liability certificate (and workers comp if they bring workers). The insurer’s one-page proof — not “I’m covered, mate”.

  • Written, itemised quote

    On letterhead, numbered and dated. Not a number in a text message.

  • Scope inclusions / exclusions

    What’s in, what’s out, line by line. “Standard installation” is not a scope.

  • Deposit amount

    Within your state’s statutory cap (NSW 10%; QLD tiered 20% / 10% / 5% by job value; VIC 10% / 5% by threshold; other states vary). Check your regulator before paying.

  • Variation clause

    How changes get priced and agreed — in writing, before the work changes.

  • Warranty terms

    Workmanship period + manufacturer pass-through, with year limits and what triggers a callback.

  • Compliance / handover paperwork

    The certificate or compliance document you’ll receive at completion (varies by trade and state).

  • Defects / callback process

    The defects-liability period and how you call them back for an obvious fault — in writing.

  • Insurance-backed home-warranty certificate

    Renovation builder-specific

  • Provisional sums and practical-completion defined

    Renovation builder-specific
Collect every item before you transfer a deposit. If a tradie stalls on any of them, that is the answer.

Related references

Briefing

The 12 questions →

 Operational

Verify a tradie →

 Translation

Glossary →

 Provenance

Source ledger →
← Back to all 33 trades

Trade 27 of 33.

Standards

Standards often relevant to this trade

These are orientation references only — not a complete or job-specific list. Ask the licensed contractor to confirm the current standards, the NCC, and any state or territory requirements that apply to your job.

Plain-English definitions, who’s responsible, and an “ask this” for each → see the glossary.