SA Residential Building Framework: Licensing, Contracts and Warranties

What it is

The South Australia residential building framework is the set of state laws and regulators that govern who can build homes in SA, how the contract must be written, what warranties apply and how disputes get resolved. The core statute is the Building Work Contractors Act 1995 (SA), supported by the Building Work Contractors Regulations 2011 and administered by Consumer and Business Services (CBS).

Licensing under the Act

Section 6 of the Building Work Contractors Act 1995 (SA) makes it an offence to carry on business as a building work contractor in South Australia without a licence. CBS issues two classes relevant to residential work. A building work contractor licence covers builders who contract directly with owners. A building work supervisor registration covers the person who actually supervises the work on site. Many small operators hold both.

The Act also requires that the person named on the licence be a fit and proper person, financially solvent and technically qualified. CBS publishes the qualification benchmarks and runs probity checks on directors and close associates.

Thresholds and exemptions

The Building Work Contractors Act 1995 (SA) sets a contract-value threshold for the formal contracting regime. From 10 November 2025 that threshold sits at $20,000 (it was previously $12,000). Work valued at or above the threshold, or work that requires development approval, generally falls inside the licensing regime and the Part 5 contracting rules. Minor maintenance below the threshold is exempt but the licensee remains responsible for any work they sign off on.

Mandatory contract terms

Section 28 of the Act sets out what every domestic building work contract in SA must contain. Where the contract price is more than $20,000 (post 10 November 2025), the contract must be in writing and legible, set out all the terms, include the builder details and licence number, and be signed by both parties. A signed copy of the contract together with the prescribed Form 1 - Your Building Contract: Your Rights and Obligations notice in Schedule 3 of the Regulations must be given to the owner as soon as possible after signing.

Section 29 of the Act regulates how the contract price is calculated, recognising fixed-price lump sum, rise-and-fall and cost-plus pricing (with the cost-plus margin capped at 15 per cent in SA). Section 30 controls progress payments and prevents a builder from demanding payment in advance of work performed. Sections 38 and 42 invalidate harsh, unconscionable or contracting-out terms.

Owners get a five business day cooling-off period after signing under section 36 of the Act. The owner gives written notice of their intention not to be bound, and the contract is treated as terminated when the notice is posted by registered post or personally served. The Building Work Contractors Regulations 2011 cap up-front advance payments at $1,000 for jobs up to $20,000 and 5 per cent of contract value for jobs above $20,000, plus specific authorised preliminary costs.

Statutory warranties

Section 32 of the Building Work Contractors Act 1995 (SA) implies statutory warranties into every domestic building work contract. The warranties run with the work and pass to successors in title. They include:

• the work will be carried out in accordance with accepted trade standards and the agreed plans and specifications
• the materials will be good and proper
• the work will be carried out in accordance with all statutory requirements
• the work will be carried out with reasonable diligence
• the house (where the work involves construction of a house) will be fit for human habitation
• the building will be suitable for any specified purpose made known to the builder

Proceedings for breach of a section 32 warranty must be commenced within five years after completion of the building work, under section 32(5). That five-year limitation cannot be extended (section 32(6)). A separate ten-year "long stop" limitation on actions for economic loss or rectification costs against builders sits in section 159 of the Planning, Development and Infrastructure Act 2016 (SA) and operates as an outer bar on all defective-building claims.

Indemnity insurance

Section 34 of the Act requires builders to hold building indemnity insurance for domestic work where the contract price is more than $20,000 (from 10 November 2025) and development approval is required. The policy is governed by section 35 and the Building Work Contractors Regulations 2011, and from 10 November 2025 the indemnity cover sits at $250,000 for defective building work where the builder dies, disappears, is otherwise unable to complete the work, or becomes insolvent. The certificate of insurance must be supplied to the owner and provided to the relevant authority when planning approval is sought; work cannot start without the insurance in place.

Disputes pathway in SA

The dispute pathway for SA residential building work is different from NSW and Victoria. SACAT does not generally hear money claims between an owner and a builder over defects or contract breaches. SACAT hears licensing reviews and disciplinary actions against building work contractors and supervisors under the Act, but the money claim itself runs through the SA court system after a CBS conciliation step. For the detail, see the sibling entry on SACAT and the SA building dispute pathway.

In practice the owner lodges a complaint with CBS, which attempts conciliation under section 8A of the Fair Trading Act 1987 (SA). If the dispute does not resolve, the claim is filed in the Magistrates Court Minor Civil Division (up to $12,000), the Magistrates Court General Civil Division ($12,001 to $100,000) or the District Court Civil Division (above $100,000). SACAT remains the forum for review of licensing decisions and for CBS-initiated disciplinary action against the licensed entity.

Why it matters for builders

A builder operating in SA needs to register the licensed entity with CBS, hold current indemnity insurance for every job that crosses the section 34 threshold, issue contracts that meet the section 28 content rules, observe the section 36 cooling-off process and keep records well past the five-year statutory warranty window. Missing any of these triggers either a CBS investigation or a private court claim through the Magistrates or District Court, both of which can suspend the licence and put future work at risk.