The European Medicines Agency is inviting bids to refurbish is Canary Wharf headquarters under a project worth up to £4 million.
Earmarked to take four years, it will see the Westferry Circus offices re-fit, with interior spaces redesigned.
The European Union's medicine suervisory group is seeking architects and other professionals to oversee the project.
The agency will invite up to seven bidders to submit formal tenders. The deadline for requests to participate is Wednesday April 23.