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Halton Region's plan keeps Regional Road 25 at two lanes from 5 Side Road to 10 Side Road; comments close October 16
Halton Region's finished study of Regional Road 25 from 5 Side Road to 10 Side Road recommends a centre turn lane, paved shoulders and a path instead of four lanes. Comments close October 16. At 5 Side Road, the Town approved a big-box retail site in June.
What the Region is proposing
Halton Region has finished a Municipal Class Environmental Assessment for Regional Road 25 from 5 Side Road to 10 Side Road, a mostly rural stretch of the north-south road that links Halton Hills and Milton. It was studied as part of the North Halton Coordinated study, which also covered James Snow Parkway and Steeles Avenue. The Region issued its Notice of Completion on September 16, 2026 and placed the Environmental Study Report on the public record.
The Region's 2011 Transportation Master Plan had called for widening this section from two to four lanes. The study instead recommends keeping one general-purpose lane in each direction, improving intersections and adding facilities for people walking and cycling. The road would sit within a 42-metre right-of-way that varies near intersections. The posted speed today is 80 km/h.
- Two 3.65 m lanes, a continuous 4.0 m two-way centre left-turn lane, 3.0 m buffered paved shoulders on both sides, and a 3.0 m multi-use path on the west side
- Two 3.65 m lanes with localized improvements such as turn lanes, and 3.0 m buffered paved shoulders on both sides; no multi-use path
- No permanent property needed; about 0.37 ha of temporary easements for grading
- About $24 million, to be confirmed in detailed design
The report says the centre turn lane is meant to cut queuing, especially at Chudleigh's, and to give farm vehicles room to turn and let drivers pass them safely. Near the cluster of homes on the southern stretch, a storm sewer would replace a roadside ditch to reduce grading on residential lots. A roundabout already planned at Regional Road 25 and 5 Side Road is a separate Regional capital project.
The report does not give a construction date. It says traffic plans will be drawn up in detailed design, and that any short lane closures would be limited to off-peak or overnight hours, with property owners told before work affects their driveways.
How to comment
The 30-day review period runs from September 16 to October 16, 2026. Written comments go to Halton Region's project manager, whose contact details are on the Notice of Completion. The report and most appendices, including the preliminary design drawings, noise and tree inventory reports, are on the Region's North Halton Coordinated study page. Subject to comments and approvals, the Region says it intends to go ahead with detailed design and construction.
Separately, anyone can ask Ontario's Minister of the Environment, Conservation and Parks for a higher level of study or added conditions, but only on the grounds that the order could prevent, mitigate or remedy adverse impacts on constitutionally protected Indigenous and treaty rights. The notice says requests on other grounds will not be considered.
The retail site at 5 Side Road
The study's southern end meets 9094 Regional Road 25, a 26.8-hectare property at the northwest corner of Regional Road 25 and 5 Side Road. On June 22, 2026, Halton Hills Council adopted Official Plan Amendment 65 and passed a zoning by-law amendment for its eastern part, about 14.1 hectares. The amendments bring that part inside the Town's urban boundary and allow commercial retail there. According to staff report PD-2026-061, the applicant is Halton Hills One GP Inc./Rice Group. General Committee carried the recommendation, and both by-laws are in the list Council passed that evening, according to the meeting's minutes.
- 15,528
- Seven multi-unit commercial buildings; more than 700 parking spaces
- Two driveways on Regional Road 25 (one signalized, one right-in/right-out) and one full-movement driveway on 5 Side Road
- Up to 15 m, where the standard zone allows 11 m
- The designated Chisholm House, a c. 1894 farmhouse, is to be moved to a spot on 5 Side Road next to existing homes
- Industrial uses proposed for a later phase, which would need further applications
Construction cannot start until the owner gets site plan approval and the Town lifts a holding provision. The holding conditions include an updated transportation impact study approved by the Region and the Town, and having any Regional road improvements it identifies designed and secured in a development agreement with the Region. The Region's study report notes that it will review any road changes the development needs alongside its own recommendations for this stretch.
Four residents spoke at the February 17, 2026 public meeting on the applications, and staff list concerns raised about traffic and road safety, wells, noise, air quality, lighting, hours of operation and property values.