Work to start this July
Firms have been put on notice for a £77m emergency services estates framework for the North-east and Yorkshire and Humber regions.
The works involved include general building works, design services and some civil engineering work.
The four-year framework will be divided into seven geographical lots. Interested firms will be able to bid for any number of lots.
The winning firms will act as main contractors and designers and will also carry out extensions, surveys, external fabric works and office and welfare refurbishments.
The framework will be open to all polices forces across the North-east and Yorkshire and Humber, plus fire and rescue services in the Yorkshire and Humber region and the Yorkshire Ambulance Service.
Bidders have until 11 March to express interest, with the contract expected to start this July.
Estates Works Framework
Lot 1: West Yorkshire region
Lot 2: South Yorkshire region
Lot 3: North Yorkshire region
Lot 4: Humberside region
Lot 5: Cleveland
Lot 6: Durham
Lot 7: Northumbria