Alexander &CO. is an integrated architecture and interior design practice based at Alexander House in Bondi Junction, Sydney. Led by principal and nominated architect Jeremy Bull, the practice brings 25 years of experience across residential and commercial buildings, combining architectural modernity with a deeply layered, highly detailed approach to interiors.

The practice's residential work spans new houses, heritage alterations, and apartment developments, including the adaptive reuse of a historic warehouse into apt.Broadway and the award-winning NoMad Apartment. Each home is shaped by material diversity, bespoke detailing, and careful spatial planning — an approach the practice describes as "clients' stories made by hand."

Alexander & CO. is a Certified B Corp and Carbon Neutral practice, and operates as a Deliberately Developmental Organisation with a focus on staff growth alongside client work. Its portfolio has been recognised across the INDE Awards, AIDA Awards, Dulux Colour Awards, House & Garden Top 50 Rooms, and the Belle Fanuli Interior Design Awards, and has featured in Vogue Living and The Australian Financial Review.