28 Main Street Unionville: The 401-Unit Rental Tower and the Hold-Removal By-law

Unionville · Markham Real Estate

If you live near Unionville GO or Markham Centre, you may have seen the site at 28 Main Street and wondered what is actually planned there. Neighbours want a clear, dated status. Buyers want to know whether a large rental building is moving forward, and what that could mean for the streets around it.

Michael John Lau, REALTOR®, helps Markham buyers and owners read planning news calmly. He has 80+ reviews from local clients. Here is what official sources say about this project as of November 11, 2026, and what is still waiting on the public record.

What is planned at 28 Main Street

The City's January 2026 public meeting information report describes a 39-storey mixed-use, purpose-built rental building with 401 homes, about 611 square metres (6,581 square feet) of ground-floor retail, and a new 0.45 hectare (1.11 acre) public park. The November 10, 2026 hold-removal memorandum, a later staff document, lists 747.19 square metres (8,042.68 square feet) of ground-floor retail.

January 2026 coverage in Markham Voice reported 345 parking spaces, or 0.86 spaces per unit, with 277 resident spaces and 68 visitor spaces. Vehicle access would be from Bill Crothers Drive.

The November 10 Council agenda places the site at the northeast corner of Bill Crothers Drive and Enterprise Boulevard, 28 Main Street, Unionville, in Ward 3.

How the owner is named in official documents

Use each name as it appears in its source. The November 10 agenda names the owner as OnePiece (MS) Developments Inc. c/o Goldberg Group, file HOLD 26 125966. The City's November 3, 2026 Housing Accelerator Fund report lists Le Banc (MS) Developments Inc. at 28 Main Street Unionville, with 401 total rental units and $2,700,000 in HAF funding. Affordable units in that chart are listed as "TBD CMHC affordable."

What a hold symbol means, in plain language

A hold, often shown as an "H" on a zoning map, is a temporary limit on a zoning permission. In simple terms, the zoning may already describe the kind of building that is contemplated, but the building cannot go ahead until conditions attached to the hold are met and the hold is removed.

The November 10, 2026 staff memorandum says the hold can be removed when certain conditions are met. Those conditions include servicing allocation, a traffic study and a travel demand plan, and site plan agreements. In that memorandum, staff said servicing availability had already been confirmed, and that a traffic study and travel demand plan had been reviewed with the site plan file. Staff wrote that the project received Site Plan Endorsement on September 23, 2026, and they support removing the hold so the owner can apply for a conditional building permit and begin work below ground. Building permits above ground would still wait until the Site Plan Agreement is fully executed and Site Plan Approval has been issued. By-law 2026-129 was listed for three readings on the published November 10 Council agenda. The by-law text on that agenda refers to a 39-storey mixed-use building containing 401 purpose-built rental units and ground-floor retail.

The minutes of that meeting were not published as of November 11, 2026. This article does not say that the hold has been lifted, or that any November 10 by-law has been enacted. Nearby owners in Unionville and Markham Centre can check the November 10 Council meeting page for minutes once they are posted.

What this means if you live or buy nearby

A purpose-built rental tower of this size can add homes, street-level shops and a new park to a growing part of Markham. It can also change traffic, views and the feel of nearby streets. Unit counts and details can still shift as a project moves through later stages.

If you are comparing homes in this part of the city, it helps to look at the official file, not only a headline. For wider context on rental supply in Markham, see what purpose-built rental means for condo investors and renters, what new rental housing is coming to Markham, and Markham's rental housing incentive. A related look at what is coming to Markham Centre in 2027 is also useful. Those posts cover the broader rental picture. This one is about this site.

Frequently asked questions

Please note: This article is general information only. It is not legal, planning or investment advice. Planning files can change, and November 10 Council outcomes should be confirmed in the official minutes once they are published. Check the City of Markham record for the latest status.

Sources

• City of Markham, November 10, 2026 Council agenda, including By-law 2026-129
• City of Markham, Hold Removal Memorandum, 28 Main Street, file HOLD 26 125966 (November 10, 2026)
• City of Markham, CMHC Housing Accelerator Fund Update (November 3, 2026)
• City of Markham, Public Meeting Information Report, 28 Main Street (PLAN 25 140590)
• Markham Voice, Markham committee backs 39-storey rental tower at 28 Main Street Unionville (January 21, 2026)
• UrbanToronto, Revised Plans Submitted for 39-Storey Rental Tower in South Unionville (January 2026)

Michael John Lau, REALTOR® · eXp Realty, Brokerage · Serving Markham & York Region, Ontario