The Twentieth Century Society

Campaigning for outstanding buildings

How to save C20 buildings

Do you believe your house or office should be listed? Are you concerned that an outstanding building in your area may be under threat? Use these practical guidelines to find out exactly what you can do to save a C20 building.

What C20 Society does

We deal with buildings constructed from 1914 onwards. Contact the Victorian Society about buildings dating from 1837 to 1913. We date a building from the year construction started.

We are interested in hearing about harmful proposals affecting listed and non-listed buildings in England, Wales and Scotland.

Find out about the building

The first thing to do is to find out as much as you can about the building:

Let us know about a threatened building

Please alert the C20 Society if you believe the building is under threat by emailing the following information to

Applying to get a building listed

Anyone can apply for a building to be listed using the online application form here.

Advice from C20

If you need advice on a building or would like the Society’s view on an application for listing, please email the following information to

We are unable provide recommendations for contractors or suppliers as this conflicts with our charitable status. The Building Conservation Directory is a good place to look for heritage specialists across the country.

Our Casework Committee meet once a month to discuss listing and major planning cases, so please allow enough time for us to consider your query.

Getting local support

Local support for saving the building can help your case:

Support us

Help us save the best of twentieth and twenty-first century architecture for future generations, by becoming a C20 Member or making a donation now.