John D. Lesak

Adjunct Assistant Professor


John D. Lesak, AIA, FAPT, LEED AP, is a Principal with Page & Turnbull and manager of their Los Angeles area office. With an interdisciplinary education in architecture, engineering, and materials science; John has been able to specialize in the preservation, rehabilitation, repair, reuse, and maintenance of historic structures since 1993. During the course of his career, he has been privileged to serve as a historic architect on a number of award-winning preservation projects - including the exterior rehabilitations of the Wisconsin State Capital & Los Angeles City Hall, the relocation of the Cape Hatteras Lighthouse, and the restoration of the spire at the Frank Lloyd Wright designed Marin County Civic Center. He has co-authored published papers and lectured on seismic impacts, deterioration mechanisms and restoration of historic cladding systems. Concerns over the socio-cultural impact of environmental degradation lead John to co-found and serve as past US-chair of Association of Preservation Technology International (APTi’s) Sustainable Preservation Technical Committee. John has written and/or lectured on the relationship between green building and historic preservation for the APTi, Traditional Building magazine, the National Trust for Historic Preservation, the California Preservation Foundation, and the Municipal Green Building Conference and Expo. John is the Past-President of the Western Chapter of APTi; recently served as Chair of APTi’s Annual Conference in Los Angeles; is a mayoral appointee to the South Pasadena Cultural Heritage Commission (serving a Chair in 2008-9); is a Director with the South Pasadena Preservation Foundation; and serves on the Los Angeles Mayor’s Design Advisory Panel.

Currently Teaching
  • 557
    Sustainable Conservation of the Historic Built Environment
    Sustainable Conservation of the Historic Built Environment
    Explore the intersection between the heritage conservation and green building movements, both of which contribute to sustainable development. Heritage conservation promotes the ethos of stewardship; defining what is significant about the built environment; methods of extending the service-life of buildings; the value of maintenance and repair; and effective means for adaptively re-using buildings. Green building promotes holistic design; responds to the urgency of climate change and the need to reduce greenhouse gases; and encourages us to look at new systems and technology. By exploring the a variety of approaches to conserving the built and natural environments, students will be able to identify and differentiate between methods for assessing sustainability, develop appropriate metrics, apply evaluation tools, and determine appropriate treatments to improve projects.
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