Unite union members at Causeway Coast and Glens Borough Council are to begin continuous strike action from Thursday.
The union said there was "a total failure to recognise the need to provide council workers with a living income".
It said the industrial action followed "a proposal to settle the strike" at a council meeting on Tuesday.
The council said it had been unable to reach agreement at the meeting and warned residents to expect disruption.
Gareth Scott of Unite said the union had hoped that Causeway councillors would "support a deal similar to that which ended the disputes at Derry City and Strabane and Mid-Ulster council".
According to the union, a proposal was put to Tuesday's council meeting "to settle the strike by offering two pay-point increments and a lump sum to workers".
In a statement, the council said the strike action related to a dispute over 2021-2022 pay, "which is negotiated nationally by the National Joint Council (NJC) on behalf of councils in England, Wales, and Northern Ireland".
"Further to this, council has been negotiating locally with trade unions, which led to the matter being discussed at last night's full council meeting," it said.
"Members were unable to reach agreement and therefore strike action will now proceed."