Explore more than 800 buildings and sites which are normally closed to the public at this year's Open House London event.
The popular annual event is back again for just one weekend this September, giving people the chance to visit the capital's most impressive houses, gardens and public venues - many which are closed off to the general public the rest of the year.
Spreading the use of sustainable building design and architecture is the core purpose of the weekend to enable the wider community to develop the tools, skills and resources to follow it through in future buildings.
Open House London has been going since 1992 when it started as a not-for-profit organisation to promote public awareness and appreciation of London's building design and architecture.
Its main role is to help change perceptions, break down barriers and inspire people to demand high-quality places for current and future generations.
The capital continues to face an increasing demand for housing and Open House London offers a unique opportunity to reveal the creative and inspiring designs contemporary architects, engineers and landscape designers are producing to tackle everyday challenges, such as climate change, the pace of urban change and sustainability.
From schools and galleries to television centres and even Downing Street, doors to the most fascinating buildings will be open on September 20 and 21.
Entrance to most venues is free and you can just turn up on the day but a few are pre-book only, with ballots for 10 Downing Street and the Antony Gormley Room at The Beaumont.
The full list of venues is available online on Friday (August 15).
Getwestlondon has selected our top three Open House destinations in each west London borough to give you a taste of what is on offer.
Ealing Town Hall, Council Chamber and Mayor’s Office
New Broadway W5 2BY
Pitzhanger Manor House
Walpole Park, Mattock Lane W5 5EQ
The White House
46 Park View Road W5 2JB
Hammersmith and Fulham
BBC Television Centre Masterplan
Meet: Entrance to the BBC Television Centre, Wood Lane, Shepherd’s Bush, W12 7RJ
Pre-book only on firstname.lastname@example.org
Emery Walker’s House
7 Hammersmith Terrace W6 9TS
The Hurlingham Club
Ranelagh Gardens SW6 3PR
Old Water Tower
9 Watertower Close, Uxbridge, UB8 1XS
Swakeleys Road, Ickenham, UB10 8LD
St Mary's Church, Harefield
off Church Hill, Harefield, UB9 6DU
Kempton Great Engines Trust
Kempton Park Water Treatment Works, Snakey Lane, Hanworth TW13 7ND
Osterley Park House
Jersey Road, Isleworth TW7 4RB
St Mary’s Convent
10 The Butts, Brentford TW8 8BQ
Pre-book only on 020 8568 7305
Kensington and Chelsea
Brompton Cemetery Chapel, Colonnades and Memorials
Old Brompton Road SW5 or Fulham Road SW10 9UG
39 Russell Garden Mews W14 8EU
Pillar Hall at Olympia London
Olympia Way W14 8UX
10 Downing Street
10 Downing Street SW1A 2AA
By ballot only
Argentine Ambassador’s Residence
49 Belgrave Square SW1X 8QZ
Victoria Embankment SW1A 0AA