Collecdev-Markee is a Toronto-based real estate development and construction company created through the 2023 merger of Collecdev and Markee Developments. Collecdev was established by the Latner Family in 2016, while Markee Developments was founded in 2019 by Jennifer Keesmaat and Jason Marks. The combined company focuses on multifamily residential development and construction, with communities across the Greater Toronto Area (GTA) and Greater Toronto and Hamilton Area (GTHA). Its portfolio includes condominiums, purpose-built rental housing, affordable housing and mixed-use communities, including projects such as Cielo, Nørdic, TRETTI, Westwood Gardens and Tyndale Green. Jennifer Keesmaat serves as CEO and Jason Marks as Executive Vice Chair, supported by an integrated development and construction team. The company emphasizes social sustainability, environmental stewardship, innovative design and complete, human-centred communities, with a focus on balancing present housing needs with long-term urban resilience. Its construction operations use an integrated, collaborative approach, combining in-house expertise, technology, skilled trades and quality-management practices from planning through construction. Collecdev-Markee also maintains a dedicated customer-care function supporting homeowners before, during and after construction, including PDI and move-in assistance. The company’s projects have received multiple BILD, OHBA, CHBA and NAHB awards and finalist recognitions, including Project of the Year and High-Rise Building Design honours for Cielo and Nørdic.