11 Brock is a four-storey supportive housing development for the City of Toronto, providing 42 homes within a total gross floor area of approximately 29,800 ft².

The building is designed around a modular “kit-of-parts” approach, combining a cross-laminated timber (CLT) structural system with a high-performance prefabricated building envelope. This strategy enabled off-site fabrication and on-site construction activities to proceed concurrently, accelerating the construction schedule while significantly reducing embodied carbon. The design also incorporates provisions for future photovoltaic installations, supporting the project’s long-term sustainability goals.

Residential suites and common areas are conditioned through fan coil units connected to a Heat Recovery Variable Refrigerant Flow (VRF) system, allowing simultaneous heating and cooling while maximizing energy efficiency.

Ventilation for residential suites is provided through dedicated standalone high-efficiency energy recovery ventilators (ERVs). Common areas, amenity spaces, and support areas are also served by dedicated standalone high-efficiency ERV units.

The domestic hot water system is generated by CO₂-based air-source heat pumps, offering a highly efficient and low-carbon solution for water heating. Electric resistance boosters are provided to satisfy peak hot water demand and ensure reliable operation during periods of high usage.