When to open
Open House Festival 2026 will take place Saturday 12 - Sunday 20 September
You are welcome to open your building or run your event at any time during the festival, including weekdays, and for as many days as you like. If you’re planning to open or run your event over one of the weekends, check the table below to see which weekend we’d suggest, based on which borough you’re in.
The aim is for your open day or event to coincide with others nearby, helping visitors to explore more in one go and increasing footfall for everyone. Please note that this is guidance only.
Weekend One
12th and 13th of September
Barnet
Camden
Ealing
Harrow
Hounslow
Kingston
Merton
Sutton
Westminster
Brent
Croydon
Hammersmith and Fulham
Hillingdon
Kensington and Chelsea
Lambeth
Richmond
Wandsworth
Weekend Two
19th and 20th of September
Barking & Dagenham
Bromley
Enfield
Hackney
Havering
Lewisham
Redbridge
Tower Hamlets
Bexley
City of London
Greenwich
Haringey
Islington
Newham
Southwark
Waltham Forest