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South Kensington Station Capacity Upgrade Design and Build

London Underground Limited

Awarded
works

This tender has closed

The submission deadline for this contract has passed. There may be more active works tenders from London Underground Limited, and hundreds more across the UK public sector.

Key details

Contracting authority
London Underground Limited
Public undertaking
Region
London
Contract value
Not stated by buyer
Submissions closed
Not stated by buyer
Published
23 September 2026

Procurement

Contract period
19 October 2026 - 18 June 2028
2 years
Possible extension to 18 April 2035 · 8 years, 5 months in total
Extension terms: The initial commitment is for Stage 1, comprising detailed design. The contract includes an option for London Underground Limited (LUL) to instruct Stage 2, comprising construction and delivery, subject to satisfactory completion of Stage 1, confirmation of affordability, receipt of the necessary approvals and satisfaction of the contractual conditions for progression. LUL is not committed to proceed to Stage 2.
Procedure type
Award under framework
CPV classifications
  • 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

Supplier
Award value
£85,000,000
Award date
17 September 2026

Contact

Address
5 Endeavour Square, London, E20 1JN
Contact name
Reeaz Korimbocus

Identifiers

Buyer reference
WS2436778117
Notice ID
090028-2026
OCID
ocds-h6vhtk-051b55
Companies House

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External ID: fts-ocds-h6vhtk-051b55 • Added 6 August 2026