Yes, Putney vale will close at the end of summer term 2025 and everyone will transfer to Richmond.
The new site, which is truly extraordinary tbh, will open in sept 2025 initially for years 7 to 12. The Head's name should be announced in january or so. It may be a massive game changer for them... and as a result, for other sw London secondary schools...
They're currently accepting registrations :"We are now presenting an opportunity for pupils to join Thomas’s Putney Vale in Year 9 (13+) in September 2024, in order to join Thomas’s College in Year 10 in September 2025.
Registration for places in these year groups is open from now until 15th December 2023. Admissions assessments will be held in January 2024. 

I noticed no one has given you any info on ACS Cobham. I went to ACS Hillingdon but toured Cobham too. They are great schools with excellent facilities. Obviously it doesn’t follow the UK curriculum (or at least it didn’t when I attended). It follows AP and IB and you can choose. The school transport links are also excellent if a day student but I assume your child will board? If so, Cobham boarding is lovely. I really liked the school. It’s also very international so you meet people from all over the world, which is great.

I read that Putney Vale will close at the end of the summer term in 2025

https://www.thomas-s.co.uk/thomass-college/
 

I might not be understanding correctly but @suprisinglima you mention that Thomas's children will transfer to the Richmond site when it opens. Does this mean that the Putney Vale site will close when the Richmond site opens? 

Defne wrote: ↑Thu Nov 09, 2023 11:17 pm Please can you share your views about Thomas’s Putneuno onliney Vale and ASC Cobham International School? I am considering both schools for my son who is in Year 9. Thanks

This post also talk about Thomas’s Putney Vale. You can reference.
viewtopic.php?f=6&t=126530
 

If your son goes to Thomas’s he will transfer to the one they are opening in Richmond, in case you were not aware.

Please can you share your views about Thomas’s Putney Vale and ASC Cobham International School? I am considering both schools for my son who is in Year 9. Thanks