List of new property developments and buildings in London SE21 New developments for sale and rent in the London SE21 postcode. Residential and commercial property news and information. Areas: Dulwich, Dulwich Village, West Dulwich and a part of Tulse Hill. Local authority: Lambeth, Southwark. 99 Thurlow Park Road Last comment: All apartments are now under application! List of new property developments and buildings in London SE21