4SA caters to established property owners with heritage portfolios in Central London’s Conservation Areas and private homeowners looking to sensitively refurbish and extend their historic homes. 

Featured Projects


Workplace

Pall Mall


residential

Curve House


Workplace

Grosvenor Place

We guide the design process with a supportive hand, ensuring a balance between creativity, practicality and meeting each client’s unique vision. Explore our Workplace and Residential projects.