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The Retrofit SuDS Feasibility Toolkit provides City of London engineers with a clear, practical framework for identifying and integrating blue-green infrastructure into streets and public spaces, supporting the City’s Climate Action Strategy. By streamlining early-stage decision-making and focusing on retrofit-friendly SuDS such as rain gardens, tree pits, and permeable paving, the toolkit helps accelerate the delivery of a more resilient, greener and climate-adapted Square Mile.
New Change Gardens transforms a once hard, inaccessible space into a fully accessible, biodiverse and climate-resilient public garden at the heart of the City. Through sensitive level design, SuDS-led surface water management and the creative reuse of heritage materials, the project showcases how small urban spaces can be reimagined to support people and nature alike.
Little Trinity Lane has been transformed into a greener, climate-resilient streetscape through the introduction of sustainable drainage, climate-resilient planting, and greater amenity offering. Set against a historic backdrop the scheme slows and manages runoff at source, enhances biodiversity, and creates a more inviting space for everyday use in the heart of the Square Mile.
The Leadenhall Street Transformation represents a once-in-a-generation opportunity to reimagine one of the Square Mile’s most iconic streets — creating a safer, greener, and more resilient environment at the heart of the City of London.
The Powdermills Hotel is a Grade II listed country house estate reimagined through a sensitive yet rigorous design approach, accelerating delivery of a 4-star hospitality destination within 78 acres of lakes, streams, pastures, and ancient woodland.
Colway Gate is a thoughtfully engineered residential development perched above Lyme Regis, transforming a steep and geologically complex coastal site into a sustainable, resilient, and high-quality living environment that responds sensitively to its dramatic landscape.
Having worked on this property many years ago, our team was re-engaged to design the drainage system for a new natural swimming pond, transforming the part of the back garden into a space for wild swimming.
Our team was instrumental in delivering this distinctive development of four new-build homes in Purley—contemporary residences designed to maximise natural light, promote open-plan living, and connect seamlessly with their landscaped setting.
We played a key role in developing a sustainable drainage strategy that reflected the project’s environmental ambitions. By incorporating permeable paving, rain gardens, and bioretention areas, we were able to attenuate surface water runoff and limit discharge to 1 litre per second—without the need for any buried attenuation tanks.
52–53 Old Steine is a sensitive retrofit of two Grade II listed Georgian townhouses and adjacent office space, transforming underused buildings into high-quality student accommodation while integrating modern drainage infrastructure within a complex heritage setting.
The redevelopment of Kingston Grammar School’s Bridgen Science Centre is a bold investment in modern science education, where EGY’s drainage design helps future-proof the school’s infrastructure and support its commitment to sustainability and excellence.
