Crossroads Windsor and Maidenhead, based at Dedworth Clinic, in Smiths Lane, Dedworth, was set up in 1992 but ran into trouble following the publication of the Care and Support Bill in 2012.
It brought in a direct payments system instead of council grants, resulting in a loss of income for the charity.
A lifeline has been provided by the Oxfordshire branch of the charity which took over the weekday services in Windsor on Saturday.
This also includes weekend respite care at Boyn Grove Community Centre in Maidenhead.
Tony Matthews, founder and chairman of trustees of Crossroads W&M, said: “It was our aim to make sure our clients were cared for so I am very relieved that the service has been sustained.
“It’s the outcome we were hoping for, it was our greatest fear that our clients would be left in the lurch so we are very grateful Oxfordshire has come to take over.”
The charity, which enables unpaid carers to have breaks, has a temporary office at All Saint's Church, in Dedworth Road, on Thursdays until a permanent base is found.
The take-over was facilitated by the Royal Borough who worked with Crossroads to find a solution.
Cllr David Coppinger, cabinet member for adult services and health, said: "There are many unpaid carers in the borough who tirelessly look after loved ones at home and are in desperate need of support and a break from their work.
"I'm pleased that we have been able to work in partnership with Crossroads to ensure that this vital facility continues to provide valuable services to our residents who do so much to help others in greatest need."
Services included in the takeover include a live in service, night duties, personalised budgets and end-of-life support.
All calls to be directed to the Oxford branch on 01865 260280 or Windsor mobile phone on 07833 449031.
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