PTM was established in Wellington in 1973 and forms part of the Peddle Thorp International group of companies.

Peddle Thorp is a global network of architectural practices with over 120 years of experience in designing and delivering projects of architectural excellence. The group includes practices throughout Australia, Asia, and New Zealand, with offices in Taupo, Auckland, Sydney, Melbourne, Brisbane, Surfers Paradise, Canberra, Darwin, Cairns, Jakarta, Singapore, Kuala Lumpur, Abu Dhabi, Hong Kong, Shanghai, Shenzhen and Port Moresby.

The reputation of PTM is based on planning excellence and inspirational design, combined with extensive construction knowledge and administration skills, with an emphasis on delivery of projects within budget and time constraints.