An NHS body has opened bidding for a four-year public sector contract valued at £50m.
Types of work to be delivered under the NHS London Procurement Partnership deal include building surveying services, civil engineering services and project management services.
Interested parties have until 30 March to submit expressions of interest.
The official notice in OJEU did not specify how many firms would be appointed, but said new firms could join the contract at any point during its lifetime.
NHS trusts, bodies providing NHS services and other public sector bodies will be able to use the contract.
The NHS LPP opened a £750m framework for construction works across the public sector in January.
That 10-lot framework will be broken into regional areas and will focus on different types and values of work, including modular projects.