Andrew Catto Architects in Putney, London SW15 has been helping homeowners, developers, property owners, schools and businesses across SW and West London and Surrey to get the best from new buildings, extensions, conversions and renovations since 1999. We can be your guide all the way from initial brief to helping you to find the right contractor and getting it built, or for just those stages you need to achieve your dream project. Our wide experience and local knowledge results in a high rate success with the planning permissions and other consents you need.