Castanon Associates is a small practice based in Hampstead. It started as Javier Castañón RIBA in 1978. In 1992 it became a limited company under the name of Castanon Rickman with two directors extending its field of expertise to include structural engineering and project management.

In 1999 it reduced its scope to architecture only, becoming Castanon Associates. Also in 1999 the relationship the firm had enjoyed with Jaime Castañón Arquitectos in Madrid since 1990 was formalised with the formation of Castañón Asociados Madrid. The two firms from then on have acted as one when the projects have so required it and retain a minimum of independence to guarantee their ability to perform in each country according to the local custom. Castanon Associates has completed new-build and refurbishment projects in the UK only, whilst Castañón Asociados has worked mainly in Spain, including several restoration projects of the Primate Cathedral of Spain, the Toledo Cathedral, but has completed projects also in Italy and South America.

Castanon Associates has been responsible for the design of a number of new-build projects within conservations areas, such as a large residential new build development within the Netherhall Gardens Conservation Area in the London Borough of Camden, a substantial residential development in Victoria Park Conservation Area in Manchester, also linked to a Grade II Listed Building, and a large villa within Chelsea Park/Carlyle Conservation area in the Royal Borough of Kensington and Chelsea.

Amongst the refurbishment projects of existing buildings within conservation areas, particularly relevant to this project, we could mention the refurbishment and restoration of a large property in Bayswater Conservation Area in the London Borough of Westminster, the restoration of a Grade II listed Victorian villa in Manchester and the renovation of Grade II* listed St Patrick’s Church in Soho Square, London.

As well as being a practising architect Javier Castañón has been teaching at the Architectural Association School of Architecture, London since 1982 and is currently the Head of Environmental and Technical Studies and Master of Technical Studies for the Diploma School.