The Twentieth Century Society

Members’ page

Welcome to the C20 Members’ page. Thank you for helping to preserve the best C20 architecture and design.

Sign in to book current events or to renew your C20 membership. See below for a reminder of your membership benefits, and details of other membership categories if you would like to upgrade your membership. Paying by direct debit helps to save administration costs – and saves you money too. If you would like to switch to direct debit please print and complete the Direct Debit Form Aug 2017, send it to the office and we will do the rest.

If you are a C20 member but do not have a username or password for the website yet, please click here to register. If you have forgotten your login details, please click here to request a reminder. You can access our event booking pages without logging in, but booking is easier if you sign in.

If you have any problems using this website please email

Did you know that we now have groups around the country? Get in touch with your nearest regional group to hear local news and join in with informal trips and social events.

Contact preferences and data options

You can view our Privacy Policy here. To update your preferences for how we contact you or make any other changes to the data we hold about you please contact or call 020 7250 3857.

Not a member yet? See the benefits below and join here.

Membership benefits

  • Members-only tours and walks, including to C20th buildings which are otherwise inaccessible.
  • Free copy of the Society’s journal.
  • The chance to join specialist-led overseas study visits.
  • The C20 magazine three times per year. Unique and informative articles written by architectural historians and enthusiasts, news from caseworkers on current campaigns, book reviews, opinions and profiles.
  • Monthly e-newsletter for event updates and news.

Membership categories

  • Individual £57
  • Concession £42 (under 30s, over 65s, full time students, registered disabled)
  • Household (2 adults at the same address, with up to 2 under 18s) £78
  • Household concession £66
  • Affiliate (non-profit making) £120
  • Corporate Membership from £500 (Please contact us to discuss the benefits package)
  • Benefactor from £330
  • Life £1500

Benefactor membership offers the opportunity to make a substantial contribution to our campaigns and our key projects, including the publication of our well-respected journal. The benefits it offers aim to provide a unique and enjoyable insight into what we do – and the opportunity to meet some interesting people. In addition to regular member benefits, benefactors receive:

  • A free pair of tickets to a social event in a significant venue to which access is generally unavailable, with a guest speaker.
  • A free pair of season tickets to Spring and Autumn lecture series.
  • A pair of free tickets to any C20 conference held in the year.
  • Acknowledgement in our magazine.

Overseas membership is available at the rates above plus an additional postage cost of £23 within Europe and £30 for the rest of the world.