estimation ltd is a family operated business which offers personal service at a reduced cost when compared to the bigger corporate consultancies


We place particular emphasis on experience, expertise, reliability and quality. The assurance of quality is fundamental for all consulting we undertake. 

Professional Organisations & Associations​

Our team members are current members of the New Zealand Institute of Quantity Surveyors (NZIQS). The NZIQS is the professional organisation for quantity surveyors, estimators, cost managers and cost consultants in the construction industry. The NZIQS encourages quantity surveying best practice and promotes the highest ethical standards for the profession. 



Derek Smith is a member of The Institute of Refrigeration Heating & Air Conditioning Engineers of New Zealand (IRHACE).  The IRHACE advances and promotes the technology used in the HVAC industry, and promotes a high level of skill and design by developing Practice Guides, Qualifications and other relevant NZ Standards. 


estimation ltd has been a member of the New Zealand Green Building Council (NZGBC) since 2007. The NZGBC is an organisation dedicated to accelerating the development and adoption of green building practices. In addition to this, both Julie Pengelly & Derek Smith are Green Star Accredited Professionals (GSAP). GSAP's help ensure that the Green Star process is a smooth, cost-effective and rewarding experience for all involved in the project.