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ZWZWZW
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No frills,

Just honest expertise in all things 

Construction

ZoneWork

ZoneWorkZoneWorkZoneWork

No frills,

Just honest expertise in all things 

Construction

ZoneWork

ZoneWorkZoneWorkZoneWork
About

Rhett Calvert, Director

ZoneWork offers dedicated project management services that bring clarity, technical rigor, and commercial discipline to complex construction environments. By combining hands-on experience with transparent contract administration, ZoneWork helps clients navigate high-risk projects from inception to completion.

Find out more

Contractual Assurance and Dispute Resolution

Engineer to Contract (EtC) / Independent Certifier (IC) Services

Engineer to Contract (EtC) / Independent Certifier (IC) Services

Engineer to Contract (EtC) / Independent Certifier (IC) Services

We act as the named EtC or IC under NZS 3910 (2013 & 2023) and other forms of contract. Our Construction Engineering background allows us to draw on experience from both the Contractor and Principal side, providing a uniquely pragmatic and balanced approach to contract administration. Our CPEng status guarantees the necessary independence and fairness required for determinations.


  • Engineer to Contract NZS 391x, 
  • Independent Certifier NZS 3910:2023, 
  • Contract Administration Services,
  • Contract Dispute Management, 
  • Arbritration and Determination 


Independent Contract Administration: Administering the contract in both the Principal's Agent function and the independent decision-making function (as required by NZS 3910).


Dispute Management: Proactive assessment of contractual risk and drawing on dual-sided experience to manage disputes before they escalate to formal proceedings.



Expert Witness Services & Forensic Auditing

Engineer to Contract (EtC) / Independent Certifier (IC) Services

Engineer to Contract (EtC) / Independent Certifier (IC) Services

We provide credible, authoritative evidence for matters before the New Zealand Courts, tribunals, and arbitration. Our focus is on the commercial and managerial aspects of large-scale Auckland construction disputes.


  • Construction Expert Witness, 
  • Forensic Engineering, 
  • Construction Delay Analysis, 
  • Dispute Resolution
  • Construction Litigation Support, 
  • Quantum Expert Witness, 
  • Construction Cost Consultant 


Delay and Disruption Analysis: Causation, critical path analysis, and assessment of contractor/consultant programme compliance. Assessing whether project managers, contractors, or specialist consultants met the expected professional standards of competence.


Cost Claims & Variations: Reviewing, quantifying, and defending complex variation and cost escalation claims



Strategic Risk, Quality, and Sustainability

Independent Project Quality Assessments & Health Checks

Independent Project Quality Assessments & Health Checks

Independent Project Quality Assessments & Health Checks

 We perform comprehensive project deep-dives to assess project health, risk exposure, and governance effectiveness. Our reports are structured to provide actionable intelligence for all stakeholders, from the C-Suite to the implementation team.


  • Independent Project Quality Assessment, 
  • Project Health Check NZ, 
  • Project Administration Audit
  • Project Assurance Services,
  • Construction Risk Consulting


Project Health & Risk Deep Dive: Comprehensive review of documentation and contracts to assess effectiveness and compliance with Management Plans, Contract duties, and Industry Best Practice.


Reporting: Providing a detailed, tiered report suitable for Shareholders, Directors, and Implementers. Ideal for critical decision points or project handovers.

Green Star and Homestar Consulting

Independent Project Quality Assessments & Health Checks

Independent Project Quality Assessments & Health Checks

 We guide design and construction teams through the complex process of achieving Green Star and Homestar certification, ensuring your asset is future-proofed and attracts sustainable finance.


  • Green Star Consultant NZ, 
  • Homestar Accredited Professional, 
  • Sustainable Building Certification
  • Green Star Project Strategy, 
  • NZGBC Consultant 


Feasibility & Strategy: Reviewing project potential, setting target ratings, and advising on which credits to pursue to achieve the most cost-effective and highest rating.


Design Integration & Assurance: Collaborating with the design team to ensure all specifications meet certification requirements, providing a clear roadmap to secure the final rating.

Exempt Building Work Compliance Review

Independent Project Quality Assessments & Health Checks

Exempt Building Work Compliance Review

 Under Schedule 1 of the Building Act 2004, certain minor works are exempt from requiring a Building Consent but must still comply with the Building Code. We provide the necessary professional documentation for assurance.


  • Exempt Building Work Review , 
  • Schedule 1 Compliance Engineer, 
  • NZ Building Code Compliance,
  • Independent Compliance Report, CPEng 
  • Property Due Diligence 


Schedule 1 Verification: Reviewing as-built minor works (e.g., decks, minor internal alterations, non-load-bearing partitions) to confirm compliance with the Code's performance requirements (e.g., B1 Structure, B2 Durability).


Pre-Purchase Assurance: Providing independent professional opinions for property purchasers or vendors to address questions regarding unconsented or exempt work recorded on the property file.



Property Development and ADVISORY SERVICES

Specialist Property Development Strategy

Specialist Property Development Strategy

Specialist Property Development Strategy

We are property development specialists focused on high-risk, high-reward scenarios. Our expertise is in the commercial and logistical challenges of redevelopment and conversion projects.


  • Live Environment Construction Strategy, 
  • Commercial Property Redevelopment, 
  • Minimise Tenant Disruption
  • Commercial to Residential Conversion, 
  • Auckland Development Feasibility 


Live Environment Redevelopment: Creating strategies and structuring teams to minimise construction disruption and tenant loss within occupied commercial facilities, ensuring asset value appreciation.


Commercial to Residential Conversion: Supporting the entire client journey from initial feasibility and acquisition, through resource and building consents, construction, and final operations handover.


Advisory Services

Specialist Property Development Strategy

Specialist Property Development Strategy

Leverage our deep experience in construction economics and commercial strategy. We offer bespoke training and speaking engagements for industry events and internal teams.


  • Construction Industry Research, 
  • Procurement Strategy Training, 
  • Construction Commercial Training, 
  • Bid Coaching and Tender Support,
  • Industry Best Practice Speaker 


Construction Economics and Risk: Commercial strategy, market outlook, and effective procurement strategies in a volatile market.


Commercial Training: Bespoke training on NZS 3910 and CCCS contract commercial interaction, risk assessment, and claims management for non-technical staff and management. Bid coaching to win new work.


Contact Us

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66 King George Avenue, Auckland 1023 kiaora@zonework.co.nz +64 27 450 4893

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