Tanner Street
No. 60 Tanner Street is an end-of-terrace residence located in the London Borough of Southwark. Originally built in the Victorian era (c. 1880), the property first served as part of a local school before being converted into housing in the mid-1990s. Constructed in traditional London stock brick, the house retains its original façades, with both front and rear elevations reflecting its historic character. The project was developed by HASA Architects as part of a programme of sensitive residential adaptations within historic London buildings.
The earlier conversion created a two-bedroom layout. HASA Architects were commissioned to reconfigure the property to provide a master bedroom with ensuite and a roof terrace, delivering generous modern living accommodation while introducing an addition that would complement the existing building and its historic character.
The new extension leverages cross-laminated timber (CLT) to achieve both precision and speed in construction. The prefabricated panels were rapidly erected on site, allowing the complex pitched roof form to be completed efficiently while maintaining the integrity of the original building.
The structure explores the interplay of light and material. The exposed CLT surfaces provide a warm, tactile interior, while strategically placed skylights and irregular window openings bring natural light deep into the space. This combination creates a home that feels both intimate and visually dynamic.
Externally, the new cladding complements the historic brick of the former boarding school, contrasting smooth timber surfaces with the rough texture of the original masonry. Vertical timber elements refine the proportions of the elevations, resulting in a contemporary addition that respects its heritage while introducing a sense of delight and discovery for its residents.
