Renovation financing and how to protect your payments in WA

Getting the money side of a renovation right matters as much as picking the right contractor. Most disputes that end up in the complaints reviewers mention aren’t really about tiling or timelines, they’re about who paid what, when, and whether the work matched the money that had already changed hands. This guide covers how Perth homeowners typically fund a renovation and how to structure payments so you’re never exposed for more than the work actually completed.

How people actually fund a renovation

For smaller jobs like a bathroom refresh or a kitchen update, many owners pay from savings or redraw against an existing mortgage, since the interest rate is usually lower than a personal loan and there’s no separate application. For a full home renovation, an extension or a granny flat build, a dedicated construction loan is common. These release funds in stages as a lender’s inspector confirms each stage of work is complete, which protects you from paying ahead of progress. A personal loan or line of credit is faster to set up and doesn’t require the same paperwork, but it usually comes with a higher interest rate, so it tends to suit smaller, shorter jobs rather than a full renovation.

Whichever route you take, a mortgage broker who works with renovation clients specifically can usually save time comparing options, since the right structure depends on your existing loan, equity and the size of the job.

Fixed-price and cost-plus contracts also affect how you should think about financing. A fixed-price contract makes budgeting straightforward, since the total is set before you draw down funds. A cost-plus arrangement, where you’re billed for materials and labour as the job progresses, needs more of a buffer in your financing, since the final figure isn’t locked in until the job is finished. If you’re using a construction loan, ask your lender how it handles cost-plus billing before you commit to that pricing structure with a contractor.

How staged payments should work

A well-structured contract ties each payment to a specific, checkable stage of work, not to the calendar. A typical structure looks something like this, though the exact split varies by contractor and job size:

Stage	What should be complete	Rough share of total
Deposit	Contract signed, materials ordering can begin	Small, to secure the booking
Demolition / rough-in	Old fixtures removed, plumbing and electrical roughed in	Early-stage share
Waterproofing / framing	Waterproofing certified or structural frame complete	Mid-project share
Fit-out	Tiling, cabinetry, fixtures installed	Later-stage share
Completion	Final inspection, snag list cleared, handover	Final share, held until you’re satisfied

The point of staging is simple: at no point should the amount you’ve paid be meaningfully ahead of the work that’s been done. If a contractor asks for most of the money upfront, or wants the final payment released before a proper inspection and snag list, that’s worth questioning before you agree.

Red flags worth slowing down for

A few patterns come up again and again in the kind of complaints reviewers report: quote delays that stretch on for weeks, a job that balloons from a five-week estimate to sixteen weeks with no clear explanation, or a contractor who goes quiet once a deposit has cleared. None of these are proof of a scam on their own, but together they’re worth treating as a signal to pause. Ask for everything in writing, including any variation to the original price, and be cautious of anyone who resists putting a payment schedule on paper or insists on cash only.

If a variation does come up, a legitimate one should be explained before the extra work happens, not billed after the fact as a surprise. Ask what caused it, what it costs, and get sign-off on the revised price in writing before the contractor proceeds. A contractor who treats variations as a normal, well-documented part of the job is a very different proposition to one who uses them to quietly inflate an initially low quote.

Getting the contract right from the start

A proper renovation contract should set out the scope of work in enough detail that there’s no ambiguity about what’s included, the payment schedule tied to stages rather than dates, start and expected completion timing, and what insurance and warranty cover the work. If a contractor can’t or won’t provide this before work starts, treat that as a bigger warning sign than any single price. You can compare ranked local contractors from the home page, and the scoring behind those rankings, including how consistency of past work is weighed, is set out on our methodology page.

This is general information, not financial or legal advice. For a contract-specific question, or before signing anything for a large-value project, get advice from a solicitor or licensed financial adviser.