Canadian National Railway Company and Dagmile Holdings Inc. are asking the Town of Milton to let them turn about 593 acres of farmland east of Tremaine Road and south of Britannia Road into a new industrial business park.
The application, which also involves four numbered Ontario companies, Errolmia Properties Inc., and NAI Milton I, LP, would see the land added to Milton’s urban area, re-designated from Prime Agricultural Area to Industrial Area under the Official Plan, and rezoned from Agricultural and Greenlands A to Industrial. No decision has been made, and a public meeting will be held for residents to learn more and share feedback.
If approved, the proposal would allow 11 buildings covering about 812,000 square metres. The buildings could be used for cold storage warehousing, a data centre, a district heating and cooling plant, motor vehicle equipment storage, a warehouse club, and wholesale operations.
The lands are made up of 16 properties that are currently outside the town’s urban boundary in the Rural Area, designated as Prime Agricultural Area and Local Natural Heritage System under the Official Plan and zoned Agricultural and Greenlands A. Milton’s employment land vacancy rate fell from 19 per cent to 12 per cent in the first quarter of 2026, and industrial leasing activity more than doubled in 2025, according to a town news release.
The application was declared complete on August 7, 2026, and is now under technical review by town departments and agencies. A statutory public meeting will be scheduled in the coming months, with notice given according to Planning Act rules.
The proposal sits near CN’s separate $250 million Milton Logistics Hub, a federally approved intermodal facility expected to open in 2027. That project drew strong community opposition, and a petition against the new industrial park cites concerns about diesel truck traffic, air quality, traffic congestion, and cumulative environmental impacts. The petition, hosted on change.org, says the development would draw heavy truck traffic through or next to existing and planned residential areas.
Milton Council adopted a new Official Plan on June 22, 2026. It sets rules for urban boundary expansion requests, requiring applicants to show a need for the land, prove no negative financial impact on the town or region, and protect farmland and the environment. The application will be reviewed against those policies, along with feedback from residents and agencies.
Town files for the application are LOPA-05/26 and Z-08/26, and the lands are in Ward 4. Jill Hogan, Commissioner of Development Services, is the contact for questions.
