South Kensington Station Capacity Upgrade Design and Build
London Underground Limited
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Key details
Procurement
- 45000000 Construction work
- 51100000 Installation services of electrical and mechanical equipment
- 51300000 Installation services of communications equipment
- 51500000 Installation services of machinery and equipment
- 71200000 Architectural and related services
- 71300000 Engineering services
- 71400000 Urban planning and landscape architectural services
- 71500000 Construction-related services
What happened
London Underground Limited awarded this contract to COSTAIN LIMITED worth £85,000,000 on 17 Sept 2026. The contract runs until 18 Jun 2028.
Description
This notice confirms London Underground Limited's (LUL) intention to award the South Kensington Station Upgrade two-stage Design and Build contract to Costain Limited as a call-off contract under TfL's Infrastructure Improvement Framework.
The proposed contract will be delivered through two (2) stages:
- Stage 1: Detailed Design (NEC3 ECC Main Option E)
- Stage 2: Construction (NEC3 ECC Main Option C)
In accordance with the framework allocation process as described in Schedule 7, the South Kensington Station Capacity Upgrade project was allocated to Costain.
The works will deliver an enlarged station with new platform, extended ticket hall, provision of step-free access from street to all platforms and improvements and modernisation to the station systems and staff welfare. The project will bring the new station infrastructure into operational use and realise the benefits of the wider South Kensington Station Upgrade investment, including increased station capacity.
LUL's initial commitment under the contract is limited to Stage 1. Progression to Stage 2 is optional and subject to completion of Stage 1, confirmation of affordability, receipt of the necessary approvals and satisfaction of the contractual conditions for progression. The price for Stage 2 has not yet been agreed and will be developed during Stage 1. The contract value stated in this notice therefore includes an estimate for the potential Stage 2 works and should not be interpreted as an agreed or committed Stage 2 price.
Awarded supplier
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Identifiers
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External ID: fts-ocds-h6vhtk-051b55 • Added 6 August 2026