More than 800 of London's most exclusive buildings to open doors

A collection of more than 800 exclusive London homes, sites and buildings are to open their doors in September.

As part of the annual Open House London, members of the public will be granted exclusive access to some of the capital’s grandest mansions, most impressive gardens and innovative public venues, reports.

Open House London sees buildings and sites which are usually closed to the public open their doors for just one weekend. Now in its 22nd year, the not-for-profit organisation has grown from simply promoting London’s existing architecture to educating architects on sustainable building design, allowing them to pick up the necessary skills to produce great work in the future.

This year’s locations are split into five categories: Green Exemplar, Infrastructure/Engineering, Landscape and Public Realm, Design for Living and The Changing Skyline. Those currently confirmed include The White House, Ealing (home to Polish Prince Janek Zylinski), 55 Baker Street, the Abbey Mills Pumping Station and Lloyd’s of London.

While many venues either have free entry or are usually open to the public anyway, there are several which require pre-booking, such as 10 Downing Street and the Antony Gormley Room at The Beaumont, reports.

Open House London 2014 takes place on September 20 and 21, with the full list of venues available online on Friday, August 15.