Looking ahead to September, the capital is preparing for the 35th edition of the Open House Festival. Running from September 12 to 20, 2026, this monumental event unlocks the doors to hundreds of the city’s most secure and private architectural landmarks, government buildings, and private homes that are usually strictly off-limits to the public.
General bookings officially open in mid-August. We advise corporate hospitality directors and architectural enthusiasts to register their accounts on the Open City platform this week. High-profile sites, such as the subterranean Roman Basilica and private Downing Street tours, book out within minutes of the ballot opening.
- Address: City-wide architectural festival across London.
- Verified Operating Hours: Festival events run September 12 to 20, 2026.
- Perfect For: Real estate developers, architectural investors, and cultural tourists.
- Website: https://open-city.org.uk/open-house-festival
