This page was updated May 7, 2021

At the May 5 meeting of Common Council, the City of Ithaca adopted the Ithaca Energy Code Supplement (IECS), code requirements for new buildings and major renovations that will substantially reduce greenhouse gas emissions while emphasizing affordability. Ithaca Mayor Svante Myrick called Wednesday’s unanimous vote “history-making,” and lauded the “enormous and impressive accomplishment.” The Town of Ithaca plans to discuss adoption of the IECS in early June. Learn more in this press release. See below for document downloads and additional information.


A local energy code supplement with requirements above and beyond the New York State Energy Conservation Construction Code.
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IECS-enabling legislation for the City of Ithaca that enacts the IECS as the regulatory document containing requirements for compliance. The Town of Ithaca will not be adopting an ordinance, but will be incorporating similar language into the IECS.

Updated: This document now contains all written comments received during the January/February 2021 public comment period.

Updated 3/17/21: A document summarizing comments, and the responses to those comments, relating to the current IECS draft (01-28-21).

A document summarizing comments and responses relating to the previous IECS draft (08-08-19), which informed the current draft (01-28-21).
This document is best viewed in Excel. HTML viewing is not recommended.

Note: An IECS Reference Manual, which contains non-essential information to help understand and use the IECS, will be completed and posted at a future date.


The City of Ithaca and the Town of Ithaca have been working since 2017 on the Ithaca Energy Code Supplement (IECS, previously the Green Building Policy), which contains code requirements for new buildings and major renovations that will substantially reduce GHG emissions while emphasizing affordability.

The Town Board and the City Common Council have provided guidance and approval of previous drafts of the IECS, which have also undergone significant public review. Over the last several months, City and Town of Ithaca Planning and Codes staff, attorneys, and elected officials have contributed to the development of the IECS and the IECS Ordinance. The goal is to maintain common regulations that will be adopted by both the Town and the City.

Upcoming Meetings

All meetings are open to the public. Many have time set aside for verbal comments from any interested community members. You do not have to be a Town/City resident to speak. Written comments are also accepted in advance of the meetings.

Town of Ithaca Town Board Study Session
Monday, May 24, 2021 at 4:30pm
Agenda will be available for download here.
Continue discussion of IECS

Town of Ithaca Town Board
Monday, June 14, 2021 at 5:30pm
Agenda will be available for download here.
Hold public hearing, discuss adoption of IECS