Westminster council is seeking a web-based facility to enable London boroughs to share procurement information, contacts and best practice more easily than ever before.
This will act as a "one-stop shop" for procurement activity, said the council. It will make it easier for suppliers to find out about available opportunities. Once the portal is running it is envisaged that there will be significant costs benefits for boroughs across London, it added.
The contract for the portal will be awarded by Westminster Council but the supplier will be required to implement the portal for use by all participating authorities.
The estimated cost of the portal is £50,000-£150,000 over 48 months, while the framework agreement for the e-tendering solution it estimated to cost between £40,000 and £1.5m.
Organisations expected to use the portal include Transport for London, the London Development Agency, the London Fire and Emergency Planning Authority, the Metropolitan Police, London borough councils and NHS bodies in the capital.
The contract is due to be awarded in April and the portal is scheduled for launch in June.