The latest residential home in a long list in Bradford and surrounding areas is to be shut after Calderdale councillors announced they had "no alternative" to accepting its closure.
A meeting of Calderdale Council's social services committee was told that between £500,000 and £1 million would need to be spent on Thornhill Grange, in Rastrick, to bring it up to standards required by the Government.
Eddercliffe Grange in Cleckheaton is to close and Threelands Grange in Birkenshaw closed down just over a year ago for the same reasons.
Calderdale committee members voted to close the homes as soon as was practically possible but councillors said it would be done in a sensitive and caring way, taking residents' needs into account.
"We will be going at a pace to suit the assessed needs of the residents of the homes," said the Council's group director for health and social care, Philip Lewer. "There is no definite date for when the closures will take place."
Mr Lewer said of the 89 staff employed at Thornhill Grange and two other homes affected by the closures, 24 wished to take voluntary redundancy.
"The Council has promised to do its utmost to redeploy the 64 staff who expressed a wish to remain," he said.
Residents were made aware of the situation at a recent meeting and will have to begin looking for alternative accommodation. Staff at the home refused to comment on the decision.
Calderdale Unison joint branch secretary, Tom Stewart, said he was disappointed with the Council's decision.
"I had hoped money could be found to refurbish the home," he said. "The elderly people there see that as their home and many have lived there a number of years. They are being turfed out through no fault of their own."
He said more money should have been pumped into Social Services over the years to stop the homes falling below the required standards.
Council leader, Councillor John Ford, said: "It is with great sadness that we have had to adopt these recommendations. But these homes are no longer fit for purpose. We have no choice but to go forward with the recommendations.
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