NMS Professional

The National Master Specification (NMS) is the largest bilingual generic master construction specification available commercially in North America.



Time savings

The NMS is a “deletion” master. Deleting inapplicable portions of the specification is faster and less prone to error than writing a document from scratch or copying from a previous project. Using a comprehensive master specification like the NMS reduces the work involved in specification writing and saves money.


The NMS is flexible and suitable for use on large, medium, or small projects; new or renovation construction; private or government work; or, varying tender or contract arrangements. The NMS does not restrict the designer from using any products, design concepts, or construction techniques.

Legal protection

The NMS embraces the accumulated expertise of Canada’s foremost authorities on specifications, contract documents and construction technology. The NMS is constantly reviewed by industry to ensure it represents current trade practices and construction technology. The text is clear, precise, and of sufficient detail to convey the desired meaning.

French and English

The NMS is available in either the English or French languages. In French it is called the Devis directeur national (DDN). Translating a document, if required, is faster and less costly as only the edited changes will need translation. The text in both languages follows the recognized current construction technology.

NMS updates

The NMS is continually altered to incorporate industry recommendations, product and construction changes, standard and code changes, and the like. NMS customers purchase an annual update service on CD-ROM, for a modest yearly fee, to ensure that their investment in the NMS is protected.

List of contents

To open a Windows help file, first save the file onto your desktop. If you are prompted, uncheck ‘Always ask before opening this file.’

Download the January 2021 update list-of-contents
Download the October 2019 update list-of-contents
Download the April 2019 update list-of-contents
Download the January 2019 update list-of-contents
Download the October 2018 update list-of-contents
Download the 2018 July update list-of-contents
Download the 2018 April update list-of-contents
Download the 2018 January update list-of-contents
Download the 2017 October update list-of-contents
Download the 2017 July update list-of-contents
Download the 2017 April update list-of-contents
NMS Windows

NMS Text-only

Download the 2017 January update list-of-contents
Download the 2016 October update list-of-contents
Download the NMS User's Guide


The NMS is sold by division or by packages. Users need buy only what they require. Additional divisions may be purchased at any time. The entire NMS is approximately 841 sections, occupying about 8 megabytes of disk space in the English version. The NMS is not copy protected, but must be licensed on a per-use basis.

Complete: 00-44, Performance
Architectural: 00-13, 31-33, etc.
Architectural & Conveying: 00-14, 31-33, etc.
Mechanical: 00-01, 21-23, 25, etc.
Electrical: 00-01, 26-28, etc.
Engineering: 00-01, 21-23, 25-28, etc.
Landscape Architectural: 00-01, Parts of 03-12, 31-35, PB
Structural Engineering: 00-01, Parts of 02-06, 31, 33, 35, PB
Heavy Civil Engineering: 00-01, 03, 11, 27, 31, 32, 35, etc.
Interior Design: 00-01, Parts of 03-12, PB
Conservation: 00-01, Parts of 02, 04, 06-09, 31
Air Transportation: 00-01, Parts of 02, 10, 26, 32-34
Building Services: 00-01, 14, 21-23, 25-28, etc.

Pricing for the NMS 2021 Package

Please see the 2019 Order Form for division prices

Complete (Div 01-44, Performance) $2,545.00
Architectural Plus (Div 00-14, 31-33, 35, 42-44, and parts of 34 and Performance) $1,990.00
Mechanical (Div 00-01, 21-23, 25, Selected sections) $825.00
Electrical (Div 00-01, 26-28, Selected sections) $825.00
Engineering (Div 00-01, 21-23, 25-28, Selected sections) $1,250.00
Heavy Civil (Div 00-01, 03, 11, 27, 31, 32, 35, Selected sections) $750.00
Landscape (Div 00-01, Selected sections) $470.00
Structural (Div 00-01, Selected sections) $430.00
Interior Design (Div 00-01, Selected sections) $505.00
Conservation (Div 00-01, Selected sections) $460.00
Air Transportation (Div 00-01, Selected sections) $425.00
Building Services (Div 00-01, 14, 21-23, 25-28, Selected sections) $1,250.00

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