Niwa House

2025 Manser Medal Winner

Niwa House by Takero Shimazaki Architects

South London

In the summer of 2020, t-sa were approached by a young couple in search of suitable land to build a new family home. The site needed to accommodate a house that would be fully accessible, preferably horizontally unlike a traditional vertical terraced house.

The client’s connection with Japan inspired them to seek a relationship between the house and the garden rather like the concept of engawa, a covered corridor running along the perimeter of traditional Japanese dwellings – Niwa in Japanese means garden. Additional aspirations included a house conveying texture, raw materiality and quiet atmosphere.

A vacant, derelict plot of land in South London was selected. The site, formerly the warehouse of a glass manufacturer, was set behind a row of terraced houses, located at the end of a narrow, overgrown lane. A few remnants of the industrial activity lingered on site, including a small structure at the rear, over the footprint of which a new outbuilding was designed. Working with the Structural Engineers Webb Yates, a hybrid structure was developed consisting of an exposed timber frame and stone sheathing. The tall glulam columns spanning over both storeys rise to meet a network of beams layered on two levels. These, in turn, support and work in tandem with thick limestone slabs providing thermal mass and rigidity to the slender timber structure. Light entering overhead through punctured skylights and a clerestory between stacked beams filters through soft curtains, producing a play of hard and soft shadows.

The structure and the house is considered a lightweight pavilion – a continuous series of spaces flowing into each other, extending from inside to outside through the enclosed garden and below ground courtyards. This connection is maintained through a glazed envelope creating a thermal enclosure in between the sites surrounding boundary walls. Timber columns and beams are proud of internal walls, treated with clay render, providing a soft backdrop to the structural network. The roof beams protrude towards the pergola which nearly touches the garden wall, creating spaces of privacy filled with carefully selected planting. An exquisite design which has already received recognition in the 2025 RIBA National Awards.

www.t-sa.co.uk

photography by Anton Gorlenko and Felix Koch

 

ARCHITECT

Takero Shimazaki Architects
6a Peacock Yard,
London SE17 3LH
T: 020 7928 9171

Website: www.t-sa.co.uk

“Winning the 2025 Manser Medal is a proud achievement for us, in recognition to the great team effort it takes to achieve an innovative well-loved home, conscious of its inhabitants, and making the most of natural resources in its construction and everyday use. Niwa house is built from natural materials in timber, stone and clay plaster, contributing with its layout to create a comfortable and temperate environment with natural ventilation and high thermal mass properties. It is important to us to show that design can be inclusive and beautiful, and has the power to transform lives positively, everyday, for everyone.”
Cécile David, Paolo Pisano, Takero Shimazaki