A revised proposal for\u00a010 St Mary<\/a> envisions a 59-storey mixed-use development in Downtown Toronto\u2019s Bay-Cloverhill area. Designed by\u00a0architects\u2014Alliance<\/a> for\u00a0Mattamy Homes<\/a>, the latest resubmission refines a long-evolving proposal that would tower above a preserved mid-century office building.<\/p>\n The development site spans 10 St Mary Street, 79\u201385 St Nicholas Street, and 710\u2013718 Yonge Street. The site currently includes an 8-storey heritage office building beside low-rise buildings of various ages with street-level retail and a mix of commercial uses. Surrounding buildings include high-rise residential towers, office buildings, and institutional facilities, with retail and commercial storefronts lining Yonge Street.<\/p>\n The proposal has evolved significantly since a rezoning application was first submitted by a previous owner,\u00a0Lifetime Developments<\/a>, which sought to demolish the existing office building, and which was appealed to the OMB in 2015. After Castlepoint RFT acquired the site in 2016, a settlement preserving the 8-storey building was reached with the City and approved by LPAT in 2019, allowing a 51-storey tower with 456 units.\u00a0<\/p>\n A 2021\u00a0Site Plan Approval submission<\/a> revised the plan to 50 storeys (161.95m excluding the mechanical penthouse) and 465 units, followed by a 2022 resubmission with 495 units and a 9m height increase. A more substantive redesign came with a 2023 minor variance, increasing the tower to 60 storeys, or 197.73m, and 640 units. The current resubmission lowers the height to 59 storeys while increasing the unit count to 650.<\/p>\n Bousfields<\/a>‘ resubmission of the Site Plan Approval application to the City of Toronto on behalf of the developer raises the height to 197.29m and now entails a Gross Floor Area of 48,193m\u00b2, a substantial increase from 41,650m\u00b2 in the 2022 submission and 39,345m\u00b2 in the original 2019 plans. Of the current total, 40,086m\u00b2 is dedicated to residential space across the tower, 6,843m\u00b2 to office use within the retained building, and 1,265m\u00b2 for retail, primarily fronting Yonge and St Nicholas streets. The Floor Space Index now stands at 17.69 times coverage of the 2,725m\u00b2 site, up from 15.23 in 2021.<\/p>\n A previously planned cantilever above 10 St Mary has been removed, with the tower now set further back from the south lot line. The retained office building would be rehabilitated under the guidance of\u00a0ERA Architects<\/a>, with improvements to its lobby, exterior glazing, and mosaic finishes. Other heritage elements at 79-85 St Nicholas and 710-718 Yonge would also be selectively preserved and restored.<\/p>\n Amenity space would include 1,310m\u00b2 indoors and 650m\u00b2 outdoors. Five residential elevators would result in 130 units per elevator, requiring high-speed motors for adequate service. Below grade, a three-level underground garage would accommodate 94 vehicles, including 80 residential and 14 commercial spaces, a slight increase from the 91 spaces in 2023, but a reduction from 105 spaces in 2021. Bicycle parking has been expanded to 700 spaces, up from 640 in 2023, with 612 long-term and 88 short-term spots.<\/p>\n Three subway stations are within walking distance: Bloor-Yonge interchange station is 250m to the north, a four-minute walk, while Bay and Wellesley stations are 450m and 500m away, respectively. There are dedicated bike lanes along Wellesley street and shared lanes along Bloor between Church Street and Avenue Road, although the Bloor Street lanes are threatened by the Province.\u00a0<\/p>\n This is one of a growing cluster of high-rise development proposals in the area. To the west,\u00a025 St Mary<\/a> and\u00a01075 Bay<\/a> are both proposed at 59 storeys. East of the site, proposals include\u00a015 Charles East<\/a> at 66 storeys and\u00a0645 Yonge<\/a> at 76 storeys. Taller towers are planned to the north, including 50 Bloor West at 70 storeys, 83 Bloor West at 77, and 80 Bloor West at 78,\u00a0699 Yonge<\/a> is proposed at 64 storeys,\u00a0Cumberland Square<\/a> at 75, and\u00a0The One<\/a> is under construction at 85 storeys, while\u00a019 Bloor West<\/a> would reach 99 storeys. South of the site,\u00a0619<\/a> and\u00a0646 Yonge<\/a> are proposed at 70 and 75 storeys. To the east,\u00a0Charles at Church<\/a> has risen to 47 storeys, and 88 and 90 Isabella are proposed at 62 and 69.<\/p>\n UrbanToronto will continue to follow progress on this development, but in the meantime, you can learn more about it from our Database file, linked below. If you’d like, you can join in on the conversation in the associated Project Forum thread or leave a comment in the space provided on this page.<\/p>\n * * *<\/p>\n UrbanToronto has a research service,\u00a0UTPro<\/a>, that provides comprehensive data on development projects in the Greater Golden Horseshoe \u2014 from proposal through to completion. We also offer\u00a0Instant Reports<\/a>, downloadable snapshots based on location, and a daily subscription newsletter,\u00a0New Development Insider<\/a>, that tracks projects from initial application.\u200b\u200b\u200b<\/p>\n
April 07, 2025 by Anthony Teles<\/span><\/span>\u00a0\u00a0
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\u00a0453\u00a0<\/span><\/div>\nTowering Proposal Reworked Around Heritage Office Building at 10 St Mary<\/span><\/p>\n<\/div>\n
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