Some pupils from Turing House School will be moved to a temporary site just over a mile away from the current premises.
With 150 new pupils joining the school next September, there isn’t enough room to accommodate them.
It’s new permanent site in Whitton will not be ready until 2020 leading Richmond Council to offer a temporary site in Clarendon School which will be vacated and available in July subject to formalities from the council.
Year 7 will move to the new site in September 2018, followed by Year 8 in 2019.
The Education and Skills Funding Agency will make some adaptations to the Clarendon buildings to make them suitable for Turing to use.
Councillor Susan Chappell, Richmond Council’s strategic cabinet member for children’s services and schools, said: “We have long been a supporter of the establishment of Turing House and the demand from its parents for an excellent school – which the head Colin MacKinlay is striving to provide.
“But, I know that the negotiation between the ESFA and Hounslow Council has taken longer than expected and parents will be anxious.
“I am therefore delighted that we have been able to step in and offer this opportunity to keep this school going, growing and local.”