London Open House Festival returns in September 2026, opening up hundreds of buildings and places across the capital for free. It sits somewhere between a cultural festival and an architecture open day, competing with paid tours by letting you step inside spaces that are usually off-limits — from civic landmarks to private homes, studios, and working infrastructure.
What should you plan for to get the most out of it?
Expect a mix of walk-ups and pre-booked slots, with the most popular venues filling quickly. The best approach is to build a short list by area, then group visits to avoid spending the day on the Tube. Many locations offer guided talks, which can be more rewarding than a quick look around, especially for historic buildings or complex modern schemes.
- Dates: Sat 12th–Sun 20th September 2026 — a full week to spread visits out
- Cost: Free entry at participating venues (some may require booking)
- Tip: Check access notes for step-free routes and queue expectations before you go