Five West Yorkshire councils are set to appoint a panel of barristers as part of an arrangement worth up to £10m.
Kirklees Council is leading the part B services procurement project, with Bradford, Calderdale, Leeds City and Wakefield councils also expected to take part.
The deal, worth between £5m and £10m - or £300,000 to £400,000 if only Kirklees uses the panel - will last for a probationary two years, with the option to extend it by another two.
Between three and eight barristers’ sets will be appointed for each of five lots covering employment, housing, childcare, adult social services and property, planning and environment. More than eight chambers could be selected for each area if needed.
Kirklees has already received interest from sets in London and Leeds.
The deadline for submissions is 23 May, with panelists to be announced by mid-June.