Call Us Toll Free: 1-866-805-AATO (2286)

Ottawa, Ontario, Canada

About Us

AATO Mission Statement

The Association of Architectural Technologists of Ontario is dedicated to the representation of its Members, the preservation and advancement of their professional ‘right to practice’.

AATO Members are highly qualified design and building specialists, who create innovative and practical solutions in the diverse and constantly evolving architectural and construction industry.

The AATO adheres to a strict code of professional ethics, by promoting public safety and pursuing ongoing education and training in the building sciences.

Who We Are

In 1996 Bill Pr-40, an Act respecting the Association of Architectural Technologists of Ontario was established by the Ontario Legislature. The Act recognizes the AATO’s responsibilities for the following titles:

  • Architectural Technologist
  • Architectural Technician
  • Registered Building Technologist
  • Registered Building Technician

AATO members work in a variety of positions including designers, project managers, municipal plans examiners, building inspectors, project supervisors, specification writers and general contractors. Many of our members can be found in architectural and engineering offices, varying government agencies or in other construction related occupations. In any position held by one of our members, the work is carried out in a professional, ethical manner with public safety being held paramount.

Our Role

As specialists in the science of building, AATO members are engaged in providing an extensive range of services relating to building projects, all in accordance with the Ontario Building Code.

Generally speaking, of the four titles offered within the Association, the Architectural Technologists would possess a more formal background in architectural design. Our members in private practice design and prepare construction drawings within their areas of expertise. These projects vary from residential to commercial and industrial building types. In addition to our members in private practice, the membership also has many individuals who work within the public and private sector.


A member of the AATO is a qualified professional who holds public safety as vital and seeks ongoing improvements to the construction industry. As professionals, each of our members is required to uphold our strict code ethics, adhere to the requirements of the Association, engage in continuing professional development and ensure that the integrity of their profession is not compromised in any way. As an accredited professional, each Association member draws upon their high level of education and training. This training ensures the safe design and management of all types of construction projects.


The Association of Architectural Technologists of Ontario is the only qualifying body in Ontario for Architectural Technologist and Technicians, Registered Building Technologists and Technicians.

Primarily, accredited members have graduated from a recognized program of architectural or building technology, participated in a series of upgrading courses and lectures, fulfilled an internship work experience program and successfully completed a formal examination. Persons who do not meet the minimum requirements must upgrade to the level of the architectural or building technology graduate, according to the Association’s guidelines, prior to participation in the accredited process.

To find out more about the Association, please visit the provincial website at

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