Construction Cost Plus Contract Template for New Zealand
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What is a Construction Cost Plus Contract?
The Construction Cost Plus Contract is particularly suitable for New Zealand construction projects where the scope of work cannot be fully defined at the outset, or where flexibility is required due to project complexity or uncertainty. This contract type is commonly used in urgent projects, renovation works where the full extent of work is unknown until construction begins, or projects with significant potential for variations. The document complies with New Zealand construction law, including the Construction Contracts Act 2002 and Building Act 2004, and includes comprehensive provisions for cost reporting, validation of expenses, markup calculations, and project management procedures. It provides transparency in cost allocation while protecting both parties' interests through clear definition of allowable costs, reporting requirements, and audit rights. The contract is structured to ensure fair risk allocation and clear procedures for managing changes, while maintaining the flexibility inherent in cost-plus arrangements.
About the Construction Cost Plus Contract
A Construction Cost Plus Contract is a transparent pricing arrangement where you pay the contractor for actual project costs plus an agreed fee or percentage markup. This contract type is ideal when you cannot fully define the scope of work upfront or need maximum flexibility during construction. Under New Zealand law, this agreement must comply with strict payment and reporting requirements while protecting both your interests and the contractor's rights.
When do you need this document?
You need a Construction Cost Plus Contract when undertaking complex renovation projects where hidden issues may emerge, urgent construction work where time doesn't permit detailed cost estimation, or innovative projects using new technologies or materials. This contract type is particularly valuable for heritage building restorations, earthquake repair work, or developments on challenging sites where unforeseen conditions are likely. It's also suitable for design-and-build projects where the scope evolves during construction, or when you want complete cost transparency and control over material selection and subcontractor choices.
Key legal considerations
Your contract must clearly define what constitutes allowable costs, including materials, labour, equipment, and overheads, while excluding items like the contractor's general business expenses or penalties for delays. The markup or fee structure should be transparent, whether it's a fixed percentage, sliding scale, or guaranteed maximum price arrangement. You need comprehensive cost reporting requirements, including regular invoicing with supporting documentation and audit rights to verify expenses. Risk allocation clauses should address cost overruns, variations, and who bears responsibility for design changes or unforeseen conditions. Payment terms must comply with the Construction Contracts Act 2002, including progress payment schedules and dispute resolution procedures.
Legal requirements in New Zealand
Under the Construction Contracts Act 2002, your contract must include statutory payment provisions, progress payment procedures, and dispute resolution mechanisms including adjudication rights. The Building Act 2004 requires compliance with building consent conditions, inspection requirements, and Building Code standards throughout construction. Health and Safety at Work Act 2015 obligations must be clearly allocated, particularly for site safety management and worker protection responsibilities. The Contract and Commercial Law Act 2017 governs contract formation and interpretation, while the Fair Trading Act 1986 prohibits misleading representations about costs or timelines. Your contract should include provisions for retentions, defects liability periods, and practical completion procedures that align with New Zealand construction industry standards and legal requirements.
GOVERNING LAW
Applicable law
This Construction Cost Plus Contract is drafted to comply with New Zealand law. Key legislation includes:
Building Act 2004: Sets out the legal framework for building work, including requirements for building consents, inspections, and compliance with the Building Code.
Health and Safety at Work Act 2015: Establishes obligations for workplace safety, particularly relevant for construction sites and allocation of safety responsibilities.
Contract and Commercial Law Act 2017: Provides the general legal framework for contract formation, interpretation, and enforcement in New Zealand.
Fair Trading Act 1986: Prohibits misleading and deceptive conduct in trade, including representations about construction services and costs.
Consumer Guarantees Act 1993: Provides statutory guarantees for services, including that they will be carried out with reasonable care and skill.
Building Code (Schedule 1 of the Building Regulations 1992): Prescribes the functional requirements and performance criteria that building work must meet.
Resource Management Act 1991: May be relevant for environmental and planning requirements affecting construction projects.
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