We are delighted that planning has been granted for our proposed transformation of Grosvenor Square. We are proud of the design’s simplicity, biodiversity, integration of rainwater, celebration of the Georgian oval geometry, and absolute commitment to the social and environmental benefits a garden brings to Central London. Our gardens create the soul of our city, bringing people closer to each other and closer to nature. 

The proposals drive a significant biodiversity gain and enhance Mayfair’s climate resilience. Designed to be carbon neutral from day one, removing additional over the long term - 88% of participants in the final consultation were supportive of the designs. 

Designed alongside renowned horticulturalists Nigel Dunnett and Gary Grant, the renewed garden will celebrate and restore the square’s historic features, and introduce new elements including:

• A shaded garden showcasing biodiverse planting and providing new walkways to explore

• A central open garden reinstating the original 1720’s oval shape

• Flowering entryways, providing wildlife habitats and a sense of calm for visitors

• Waterfall canopies, wetlands and channels capturing and storing rainwater for re-use

• New play spaces and an education centre

The proposals will drive a biodiversity net gain of 15.5%, exceeding best practice standards. A 500% increase in the number of plant species and 26 more trees (+35%) will increase habitats for wildlife, improve local air quality and access to nature in the West End. 

In line with its sustainability commitments, Grosvenor will deliver and operate the scheme as carbon neutral from day one. Through a highly sustainable design and management plan, embodied and operational carbon will be minimised, with remaining emissions offset through verified schemes.  

Factoring in the significant increase in planting and revitalised soils, additional carbon will also be removed and stored within the square, helping reduce Mayfair’s climate footprint in the long term.  

The submitted designs have been informed by an extensive multi-year public consultation. After gathering over 3,300 responses, the programme concluded in July 2021, with 88% of participants supportive of the detailed designs shown.  

“Tonkin Liu’s design for Grosvenor Square encapsulates an innovative and holistic approach to public space design, imaginatively considering how a garden square can be reimagined for 21st century London. Their passion for creating a place that works for both people and nature, whilst respecting its unique heritage, has created a truly beautiful concept design that we look forward to delivering.”

- Ed Green, Project Director, Grosvenor Britain & Ireland

“The planting in Grosvenor Square will be ambitious and innovative, and sustainability and climate adaptation have been at the forefront of our thinking. It will be a robust, no-irrigation, future-proofed landscape, where all planting is closely fitted to the ecological and microclimatic conditions of the area, leading to a low-input but high-impact garden.

We aim to set a new standard for biodiverse public spaces in London: swapping amenity grassland for sparkling flowering lawns, creating extensive areas of new woodland plantings beneath the existing London plane trees, and placing diverse hedges around the square, full of native flowering and fruiting plants, to create wildlife havens. This planting will look good all year-round, not just in warmer months. It's about beauty and biodiversity and bringing the exuberance of a rich natural environment into a London square in a way that hasn't been done before."

- Nigel Dunnett, Professor of Planting Design and Urban Horticulture, University of Sheffield