Masterspec
01 Apr 2025
Document Referencing and Scheduling with eCert
Our editor team has updated all Masterspec work sections which have references to environmental documents. Where environmental document references...
27 Mar 2025
Update Manager New Features
The new Update Manager features are designed to boost productivity when applying changes to updated work sections. Simplify work section updates with...
03 Mar 2025
CIL is Now Accepting Product Carbon Data for the National Embodied Carbon Data Repository for Construction.
CIL Masterspec is now accepting carbon information in the form of Environmental Product Declarations (EPDs) or Life Cycle Assessments (LCAs) from...
06 Jan 2025
Carbon 2025 and Beyond: Building a More Sustainable Future for NZ Construction
In July 2024, Construction Information Ltd (CIL) and the Building Research Association of New Zealand (BRANZ) announced a partnership to develop a...
01 Nov 2024
Introducing eCert: A Game-Changing Tool for Sustainable Construction
As the New Zealand construction industry increasingly focuses on sustainability and carbon reduction, there is a growing need for tools that can help...
26 Sep 2024
Masterspec Specified: Manawa House by Cube Architecture
"Masterspec has been an indispensable tool for our project Manawa House. During the specification, Masterspec streamlined our entire specification...
26 Sep 2024
Masterspec Specified: Award Winning Ligar Bay Bach by Young Architects
"Masterspec was used for providing a detailed, fully customised, specification as part of our comprehensive project documentation for the Ligar Bay...
25 Sep 2024
Masterspec Specified: Hilltop Home by Jon McAlpine Architecture
“Masterspec is a critical component in our studio. Its user-friendly platform and regular product specification updates, keep us constantly on the...
06 Aug 2024
NZ Building Code Changes: Type 1 Domestic Smoke Alarms
In Masterspec NOTES June 2024, we provided commentary around the changes to the NZ Building Code relating to domestic smoke alarms.
18 Jul 2024
New Industry Initiative to Reduce Carbon Emissions of New Zealand Buildings
A new industry-led initiative aims to reduce the environmental impact of Aotearoa New Zealand’s buildings, which contribute up to 20% of the national...
04 Jul 2024
Masterspec Announces New MasterKey4 for Revit 2025 Enhancements
Streamlined Workflows and Improved Collaboration with MasterKey4. We are excited to announce the latest update to MasterKey4 for Revit 2025, designed...
04 Jun 2024
Building Code Updates 2023-2024
This month we have published amendments in response to building code updates. The 2023-24 NZBC changes were published by MBIE on the 2 November 2023,...
04 Jun 2024
NZ Building Code Changes: Type 1 Domestic Smoke Alarms
From November 2023 the Building Code Acceptable Solutions for Protection from Fire (C/AS1 and C/AS2) have been amended to make Type 1 interconnected...
05 Apr 2024
Understanding Project Scope and How to Specify Window Systems
It is vital that Movement and Deflection criteria are correctly defined in the Specification. We cannot over emphasize the importance of correctly...
04 Apr 2024
MBIE Building Consent System Review - Overview and Update
In July 2022, MBIE commenced a review of the building consent system, as part of the Building System Reforms to improve the consenting process. The...
30 Nov 2023
NZCIC Guidelines Responsibility Schedule Goes Digital
The new online tool enables real-time collaboration among multiple stakeholders, fostering efficiency and innovation in construction processes.
10 Nov 2023
BCA Requests to Modify Manufacturers Technical Content
mDocs allows the specifier to quickly access the latest version of a document uploaded by the manufacturer or supplier. Importantly, these detailed...
27 Sep 2023
Masterspec Specified: Award Winning Taharoto Lane by X Studio Architects
The development will have 19 units, including studio, office, and retail space. The residential units will have balconies with views of the city...
27 Sep 2023
Masterspec Specified: Award Winning Soaring Box House by Turner Road Architecture
The house’s unique design fits into the rural landscape. The house has a cantilevered structure and a soaring angular volume. The interior design is...
13 Sep 2023
Hallmark Group Opens Up About BPIR
Recently, Hallmark Group turned to Masterspec, a trusted name in compliance solutions, for guidance on their BPIR for fire doors. In this article, we...

What is a Construction Specification?

18 May 2022

A construction specification or, architectural specification, is a document that states how a building is to be constructed, demolished, altered, or removed. 

A construction specification, if concise, should articulate design decisions and apply them to the construction sequence. The specification defines the products used and quality standards of a projects design. In New Zealand the specification is typically included in the contract and completes the documentation set alongside the drawings and schedules.

The process of specification writing, conducted in parallel with design and drawing work, helps create the balance between client, statutory, technical, and aesthetic requirements.

Who writes building specifications?

Specifications are most commonly written by architects, designers, and engineers. The industry normally labels the author a ‘specifier’.

However, in larger organisations, specifications can be completed by specialist specification writers, project managers, or members of the project design group. The principal qualifications needed are:

  • Familiarity with the project, including the design philosophy
  • Expertise in editorial, technical and contractual matters
  • Familiarity with NZ Building codes and standards

Why do we write specifications?

Specifications are very important for the construction of a building, landscape, or site. They assist in reducing the chance of miscommunication, delays, over-runs, changes to your design and much more. The specification document is important because it articulates important details that cannot be written on the drawing set.

Specifications also allow professionals to keep a record of their design intent in the unlikely case of a dispute.

When do you write a specification?

Best practice is to develop your construction specification alongside the drawings or model. Completing your documentation set all at the same time will ensure your building is consistent, and your constructor can follow your instructions without confusion or complication.

How do you write a specification?

Specification writing is imperative for every design and can be very time-consuming. Most design professionals subscribe to online specification platforms to manage their risk, obtain up to date content and minimise their time writing specifications. This allows them to efficiently build specifications with pre-populated templates and information and update the specification information if there are changes throughout their project life.

Construction specifications must be:

  • Technically accurate
  • Up to date
  • Simple to use
  • Easy to coordinate with the project drawings
  • Have a logical relationship with other related documents, including schedules of quantities
  • Standard conditions of contract and tender

Achieving this is not an easy task, especially for the smaller design practice, which may not have access to the wide range of information sources and support structures maintained by larger organisations.

Drawings convey information in a graphic form and are usually the preferred means for providing information on “where” and “how.” Qualitative or “what” information is often best described in writing. When this qualitative information is gathered together the document is called a specification.

A project specification should collect design decisions and allocate them according to the required construction sequence. Information must also be easy to locate and simple to co-ordinate with project drawings and related documents.


Not sure where to start? Masterspec is New Zealand’s largest online construction library that is relied on for up-to-date information and maintained specification content. Whether you are designing a kitchen, large commercial building, or a civil engineering project, Masterspec has the latest NZ codes and standards to specify from. Start your free 30 day trial today.