|Aquariums & Sea Life Centres|
|Educational & Theatres|
|Farms and Animals|
|Heritage & Historical|
|Indoor Play Areas|
|Kid's Activities and Clubs|
|Museums & Art Galleries|
|Outdoor Play Areas|
|Outdoor Pursuits & Nature|
|Sports and Leisure|
|Zoos and Wildlife Parks|
Rescued by English Heritage after years of neglect, this Grade I listed barn ranks alongside the Houses of Parliament and Westminster Abbey for its exceptional architectural and historic interest. It was dubbed the "Cathedral of Middlesex" by Sir John Betjeman.
Built in 1426 by Winchester College as part of its manor farm at Harmondsworth, the oak-framed barn is an outstanding example of medieval carpentry and contains one of the most intact interiors of its era. At nearly 60 metres long, 12 metres wide and 11 metres tall, with 13 massive oak trusses holding up the roof, both its size and aisles evoke the space and shape of a cathedral.
Managed by the Friends of the Great Barn at Harmondsworth.
Read more about the history of the barn.
Before You Go
Opening Times: The barn is open on selected days throughout the year. On 9 and 23 April it is open 11am-4pm. From May to September it is open every second and fourth Sunday of the month 10am-5pm. It is also open on Sunday 17 September 10am-5pm as part of Open House London. On 8 and 22 October it is open 11am-4pm. See details.
Access: The barn is accessible for wheelchair users.
Parking: There is a free English Heritage car park to the rear of the barn.
Facilities: There are no facilities on site. There are no public toilets in Harmondsworth village, but there are toilets in the nearby church hall which is open for part of Sunday mornings when the church is open, and there are two pubs within 200 metres of the barn.
School Visits/Large Groups: The barn can be opened by special arrangement for visits by educational and other groups. Phone 020 8759 1874.
Dogs: Assistance dogs allowed only.
Plan a Great Day Out
If you're heading back into central London after your visit to Harmondsworth Great Barn, make sure you visit Chiswick House & Gardens. Enjoy the grandeur of the upstairs rooms, take a stroll around the restored gardens, and refresh yourself in the wonderful café next door (not managed by English Heritage).
1 April - 30 April 2017
Open 2nd and 4th Sunday of the Month in April 2017 from 11am to 4pm
1 May - 30 September 2017
1 October - 31 October 2017
1 November 2017 - 29 March 2018
30 March 2018 onwards
Opening times will be available nearer the time