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