Warwickshire to join West Midlands 'super authority'
Warwickshire County Council will join the West Midlands Combined Authority (WMCA), having previously voted against the plan.
The U-turn was the result of a vote by the full council on Tuesday evening, where some members changed their position.
As a non-constituent member, the council will not have voting rights.
It plans to become a full member once it has agreed a deal with the WMCA and government.
Izzi Seccombe, Conservative leader of Warwickshire County Council, said it had held off becoming a full member until it had "an offer on the table from government".
The council plans to talk to residents before agreeing to a final deal.
The WMCA will have more devolved powers from the government and is set to elect a mayor next year.
Seven authorities - Birmingham, Coventry, Dudley, Sandwell, Solihull, Walsall and Wolverhampton - are already confirmed as full members.