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Improving Codes for Historic and Existing Buildings

Thursday, December 4, 2025
1:00 p.m. - 2:30 p.m. ET

Come join a conversation to learn about APT's Codes and Standards Committee new publication - Improving Codes for Historic and Existing Buildings. Supported by NCPTT, the National Center for Preservation Technology and Training, this is a valuable resource to understand the application of building codes to existing properties. The webinar will also address the advantages of the Performance Compliance Method,  potential changes to the 2027 International Existing Building Code, the model code adopted by jurisdictions, and opportunities for the APT community to become involved in improving codes and their application to historic buildings. Come learn more about this important study and how it could benefit your work.

Learning Objectives

  1. Discuss the national code development process associated with the International Existing Building Code (IEBC) and its applicability to historic buildings. 

  2. Review code development proposals to the 2027 IEBC affecting historic buildings. 

  3. Describe the use of the Performance Compliance method of the IEBC. 

  4. Explore additional building regulations, such as Building Performance Standards, with potential to impact historic and other existing buildings.  

Continuing Education Credits
AIA, RCEP, ICC
1.5 LU/HSW/PDH CEUs

Accreditation guidelines dictate that CEU credit is only available to participants of the live program. 

Can't join the webinar live? A limited-access recording of this session will be available exclusively to those who register for the webinar.  Please note, per AIA guidelines, only participants of the live program are eligible for continuing education credits.

Registration Fees

  • APT Members: $20
  • Emerging Professionals: $15 $0*
  • Students: $10 $0*
  • Non-Members: $35

* Thanks to the generous support of the Preservation Fund of the National Trust for Historic Preservation, APT is pleased to offer this program at no cost to Student members and Emerging Professional members. Not a member? Learn how to join here. 

Register

Speakers:

 

Sean Denniston, Principal, Heritage Green Consulting

Sean is the principal of Heritage Green Consulting, a preservation consultancy working at the intersection of historic preservation and sustainability. He brings particular attention to how sustainability policies impact the preservation of historic buildings and how to craft these policies to limit harm and even benefit historic buildings. His work at Heritage Green is built on a career at the forefront of sustainability and decarbonization codes and policy. He was formerly an Associate Director at New Buildings Institute where he was the subject matter expert on existing buildings for NBI’s work in energy codes, decarbonization policy and building performance standards. 

He earned a Bachelor’s Degree in Architecture with a minor in Architectural History at the University of Oregon and a Master’s Degree in Historic Preservation at the University of Pennsylvania.
 

Lesley Gilmorem, AIA, FAPT, APT RP, Preservation architect, Gilmore Franzen Consulting, LLC

 

Lesley Gilmore is a registered preservation architect in the Rocky Mountain West. She takes a systematic approach to intervening in the performance of historic buildings while enhancing their level of safety. This begins with documenting the subject building and the materials, interpreting the code in a way that makes the best use of the building and protects the users, and being on good terms with local and state code officials. She is a member of the APT Technical Committee on Codes and Standards and a contributing author to the upcoming NCPTT publication to be presented at the webinar.
 

Marilyn Kaplan, RA, FAPT, Preservation Architecture

Marilyn Kaplan, Architect and member of the APT College of Fellows, is principal of Preservation Architecture, a firm specializing on historic buildings in New York State. She has spoken and published widely on the topic of codes and historic buildings, and is the author of the recent Preservation Brief 51: Building Codes for Historic and Existing Buildings, published by the National Park Service. She has served on  the International Code Council’s committees for the 2024 and 2027 International Existing Building Code and previously on the Cultural Resources committee of the NFPA. She is a founding chair of the APT Technical Committee on Codes and Standards, and is the lead author on the NCPTT publication to be presented at the webinar.  

 

Presented by the APT Technical Committee on Codes & Standards

 

Online Educational Content Sponsor

 This project has been funded in part by a grant from the National Trust Preservation Fund of the National Trust for Historic Preservation. Specifically, in support of growing participation of students and emerging professionals in online programs.

 

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