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WA Cost Plus Contract Updates

What members need to know

Regional News

WA Cost Plus Contract Updates

What members need to know

Regional News
The WA Cost Plus Contract has been updated to improve clarity, accuracy and usability for builders. Changes include revised contract schedule items, updated document references and a new clause covering contract interpretation and document precedence.
Housing Industry Association (HIA) is Australia's largest residential building association, committed to keeping members up to date and on the pulse of the ever changing building and business landscape.  

Member's get unlimited access to news, content, resources and more...

Joining Australia’s largest national association for the residential building industry, gives you access to a huge range of industry products and business services to manage, operate and grow your business.
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Breaking news
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12 Sep
JTECH Design & Construct wins HIA Northern NSW Home of the Year

JTECH Design & Construct has won the 2026 HIA Northern NSW Home of the Year, partnered by SGA Architectural Window Solutions.

11 Sep
Urgent governance reform needed for TasBuild

The Housing Industry Association has today called for urgent governance reform of Tasmania's construction industry long service scheme, TasBuild, saying a compulsory levy on every Tasmanian builder is administered under governance and accountability arrangements fall short of contemporary standards.

11 Sep
Updated modelling: housing package estimated to cut 10,700 homes and push rents higher

The Housing Industry Association, Master Builders Australia, the Property Council of Australia, and the Real Estate Institute of Australia have released updated independent modelling of the Federal Budget housing package.

10 Sep
Thousands of new homes in sight for Bruce

The Housing Industry Association has welcomed the release of the Bruce Precinct Master Plan. The Plan is an exciting vision for the future of one of Canberra’s long neglected precincts.

WA Cost Plus Contract

This contract is used for residential building works on a cost plus basis, not a lump sum ‘fixed price’. Costs are totalled and a percentage or fixed ...

WA Addenda to Specification - Form 12

This addenda is sold separately from the WA General Housing Specifications (Form 7). These two items make up a set, although some builders have the HI...

WA Claim for Extension of Time - Form 5 (Pad of 30)

Builders wanting an extension of time for completing work will need this WA Claim for Extension of Time pad, which includes 30 sheets. This product co...

WA Practical Completion Certificate - Form 14 (Pad of 30)

The Western Australian Certificate of Practical Completion (pad of 30) enables builders to list work that may be required following a joint pre-handov...

WA Job Quotation - Form 9 (Pad of 25)

The Western Australian Job Quotation Form (pad of 25) is suitable for sub-contractors to list their conditions. It's carbonised and individually numbe...

WA Alterations & Additions Contract - Form 38E (Pack of 2)

The WA Alterations & Additions Contract – Form 38E (pack of two) is designed specifically for use on alterations, additions and renovations over $7500...

WA Pre-Fabricated Homes Contract - Form 45C (Pack of 2)

The WA Pre-fabricated Homes Contract – Form 45C (pack of two) has been designed specifically for use with modular or transportable homes.

WA General Housing Specifications - Form 7 (Pack of 2)

The WA General Housing Specifications - Form 7 (pack of two) provides a detailed description of quality of materials or workmanship, working drawings,...

WA Variation to Contract - Form 1 (Pad of 30)

The WA Variation to Contract – Form 1 details changes or variations to works requiring an update to the contract between builder and owner. It can als...

WA Small Works Contract - Form 10A (Pad of 25)

The WA Small Works contract (pad of 25 and in duplicate) has been designed specifically for projects $7500 in value or less (where the Home Building C...