Renovation Contractor in South Australia

Ask every contractor to break the quote into the same line items: demolition, structural, plumbing, electrical, walls and finishes, fixtures, and a stated allowance for materials you choose. Then compare line by line. A single lump-sum number cannot be compared and cannot be enforced when scope questions come up mid-project.

Hold back 10-15% of the contract value for surprises on a standard renovation, and 20% for older properties where opening walls tends to reveal outdated wiring, corroded pipes, or damp. Do not tell the contractor your contingency figure — it is your buffer, not extra scope budget.

A renovation contractor (general contractor or main builder) manages your whole project: pricing the job, scheduling and supervising trades like electricians and plumbers, ordering materials, arranging permits where needed, and being the single party responsible for quality and timeline. You pay one contract price instead of coordinating five separate trades yourself.

Payments should follow completed milestones, not calendar dates: for example deposit, completion of demolition and first-fix (rough-in), completion of second-fix and finishes, then a final payment of 5-10% held until the snag list (punch list) is closed. That final retention is your only real leverage for defect fixes.

Document defects in writing with photos, give the contractor a written chance to fix them within a set period, and withhold only the retention amount — not all payment — while they do. If they abandon the job, your remedies are your contract, any licensing body's complaint process, consumer protection agencies, and small claims court. This is why the paper trail and staged payments matter from day one.

At minimum: full scope of works, itemized price, start and completion dates, payment schedule tied to milestones, who obtains permits, how variations are priced and approved in writing, warranty terms, and how disputes are handled. If a contractor resists putting these in writing, that is the answer to whether you should hire them.

Builder hourly rates typically run AUD 70-130, but renovations are almost always quoted as fixed-price contracts. HIA's 2025 Kitchens and Bathrooms data puts a median kitchen at about $35,000 and structural renovations commonly run $2,000-$4,000+ per square metre.

Internal cosmetic work is usually exempt development, but structural changes, wet-area relocations, and extensions need approval — either a fast-tracked Complying Development Certificate or a council Development Application in NSW, with similar systems in other states. Your builder or a private certifier can advise which path applies.