The water business is planning to divide up work into four major lots: two covering repair and maintenance and capital works of infrastructure and two covering M&E works.
Under the procurement plan frameworks will be awarded for 2021-27, with a further extension option for 2027-2033.
Strategic contractor partners will be required to offer a design and build capability.
Scottish Water framework plan over two six-year periods
Lot 1: Repair and maintenance for infra water and waste water (Value £900m)
Lot 2: Capital investment for infra and civils (Value £1.6bn)
Lot 3: R&M for M&E (Value £700m)
Lot 4: Capital investment for MEICA (Value £2bn)
Firms have until 27 November to complete PQQs. Information is available from the procurement site.
Shortlisted bidders will then be invited to submit bids in February.