Update, April 27, 2026: East Gwillimbury won the site. I wrote a full follow-up on the announcement and what happens next: the new Southlake hospital is officially coming to East Gwillimbury. The original piece follows as published.
Southlake Health's Newmarket hospital was over capacity on all but seven days in the first half of 2019, and it hasn't had a significant acute-care expansion since 2003. That's the backdrop for the biggest infrastructure question in this town right now: Southlake is building a second, full acute-care hospital somewhere within 17 kilometres of Davis Drive, and East Gwillimbury has formally put forward land in Queensville. When I first wrote this, the town was on the shortlist and the decision was overdue. Here's what's actually happening, and what it would mean here if East Gwillimbury wins.
Why Southlake Needs a Second Hospital
The case is not subtle. The hospital was founded in 1922 and holds 502 beds. In 2019 its average daily occupancy ran at 110 percent in the first half of the year and 113 percent in the second, with more hallway beds than any other hospital in the ministry's central region. Emergency visits nearly doubled between 2003 and 2019, from 57,000 to 112,000 a year, and by Southlake's own count the emergency department now sees a new patient every four and a half minutes. In March 2023, patients waiting in emergency for an inpatient bed waited an average of 18.9 hours against a provincial target of eight. Southlake says the Davis Drive building operates in half the space current standards call for.
The Two-Site Plan
Southlake's answer, submitted to the province in January 2020, is to split into two campuses: renew Davis Drive as a centre for ambulatory care, surgery, and diagnostics, and build a new acute-care hospital nearby. The province put $5 million into planning in April 2022, with the system expected to grow past 600 beds across the two sites.
Finding the second site has been the hard part. A proposed location in King Township fell apart in 2023 when the province reversed course on opening Greenbelt lands. So in November 2024, Southlake started over with an open call: a minimum of 40 developable acres, within 17 kilometres of Davis Drive, outside the Greenbelt and Oak Ridges Moraine, inside a settlement area, able to host a heliport, and serviceable within five to seven years. Southlake also offered a sobering anchor for everyone's expectations, noting a new hospital in Ontario generally takes eight to ten years to build.
East Gwillimbury's Bid: Queensville Sideroad and Leslie
East Gwillimbury council moved fast. In March 2025 it passed a unanimous resolution backing lands northwest of Queensville Sideroad and Leslie Street, where the Green Earth Village development has two 40-to-50-acre sites available, with a York Region-owned property nearby as further support. "We are on the short list," is how Councillor Scott Crone put it.
By April 2025, Southlake confirmed eight proposals had passed the first stage, on lands in East Gwillimbury, Georgina, and Bradford West Gwillimbury. A site announcement was expected in spring 2025. As I write this in March 2026, that announcement still hasn't come. For a town that watched the King site consume three years, a quiet year of due diligence is probably the less dramatic way to lose time.
By the numbers: 502 beds today, 600+ planned across two sites · occupancy 110−113% in 2019 · ER visits up 96% since 2003 · 40-acre minimum site, within 17 km of Davis Drive · 8 shortlisted proposals · 8−10 years, the typical Ontario hospital build
What a Hospital Would Mean for East Gwillimbury
I'll keep the real-estate read careful, because this is exactly the kind of story that gets oversold. A full-service hospital is one of the largest employment and service anchors a town can land, and East Gwillimbury is the kind of place that needs one: the fastest-growing municipality in Canada over the last census, up 44.4 percent to 34,637 people, with the closest emergency department a drive into Newmarket. The shortlisted lands sit beside the future Bradford Bypass corridor and minutes from Highway 404, in the same stretch of Queensville where the new schools and the HALP Centre have already landed.
But a shortlist is not a shovel. If East Gwillimbury wins the site, the prize is a decade-long project that reshapes the north end of Queensville around it. Until there's an announcement, I treat it as a possibility worth knowing about when you buy near Leslie Street, not something to pay extra for today.
Bottom line: Southlake is building a second acute-care hospital, and East Gwillimbury is one of the shortlisted hosts, with council united behind two 40-plus-acre sites in north Queensville. If it lands here, it's a decade-long project and one of the largest anchors this town has ever attracted. Until the announcement comes, it belongs in your thinking, not in the price you pay.
Common Questions
Why is Southlake building a new hospital?
The Davis Drive hospital in Newmarket, founded in 1922 with 502 beds, ran 110 to 113 percent occupancy through 2019 and hasn't had a major acute-care expansion since 2003, while emergency visits nearly doubled over that period. The fix is to split into two campuses and grow the system past 600 beds.
Where will the new Southlake hospital be built?
In East Gwillimbury. The province confirmed in April 2026 that the new Southlake acute-care hospital will be built on Green Earth Village lands northwest of Queensville Sideroad and Leslie Street in Queensville. This piece documents the shortlist bid that came before that decision.
When will the new Southlake hospital open?
There's no opening date. Southlake's own guidance is that a new Ontario hospital generally takes eight to ten years to build, so it's a decade-long project. The site is now settled, but the construction schedule is still to come.
Buying Near Leslie Street and Weighing the What-Ifs?
A shortlisted hospital is exactly the kind of maybe that's worth understanding properly before you buy near it. If you're weighing a purchase in Queensville or anywhere along the Leslie corridor and want a straight answer on what's real today versus what's still a proposal, email me or call. I'm happy to walk through it.