London Open House Festival sits in Open City’s programme of architecture and placemaking events, and it competes with paid walking tours and ticketed heritage open days by keeping access free. For one week, it turns the city into a drop in showcase of buildings and spaces that are normally closed, hard to book, or only seen from the street. Expect everything from civic landmarks to new developments, with volunteers and experts on hand to add context rather than just letting you wander through.
Who is this for?
Anyone curious about how London works behind the scenes, from design students and photographers to locals who want a fresh angle on their own neighbourhood. It’s also a strong pick for visitors who have done the usual museums and want something more place based.
- Dates: 12 to 20 September 2026, useful for planning leave or weekend trips.
- Format: a mix of open buildings and guided tours, some may need advance booking.
- Access: free entry, but popular sites can fill quickly, so flexibility helps.