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South Kensington Station Capacity Upgrade Design and Build

London Underground Limited

This public procurement record has 3 releases in its history.

Award

23 Sep 2026 at 11:19

UK6 - Contract Award Notice
PlanningUpdate

04 Jun 2025 at 10:15

UK1 - Pipeline Notice
Planning

21 May 2025 at 15:09

UK1 - Pipeline Notice
Summary of the contracting process

London Underground Limited is buying the design and construction of a capacity upgrade at South Kensington Station, with Transport for London managing procurement on its behalf. The project is intended to enlarge the station, add a new platform and extend the ticket hall. It also includes step-free access from street level to all platforms, modernisation of station systems and staff welfare improvements. The work covers bringing the upgraded infrastructure into operational use to increase station capacity. The scope spans detailed design and construction, as well as associated engineering, building-services installation and construction-related services. Delivery is at South Kensington Station in London.

The procurement has been awarded to Costain Limited. The award date was 17 September 2026, at a value of £85 million excluding VAT (£102 million including VAT). The contract period is 19 October 2026 to 18 June 2028, with an option to extend to 18 April 2035. It was awarded non-competitively as a call-off under Transport for London’s Infrastructure Improvement Framework, using a selective procedure. The contract is staged: London Underground Limited’s initial commitment is detailed design, with construction and delivery optional. Moving to construction depends on satisfactory design completion, affordability, approvals and contractual conditions. Its price is to be developed during the design stage and is not yet agreed. The process had reached completed status when the award was recorded.

This award shows demand for major, technically integrated London Underground station upgrades combining passenger-capacity improvements with complex live-railway construction. A credible competitor for comparable work would need to bring detailed design and construction capability together, including station and platform planning, ticket-hall alterations, step-free access, engineering, electrical and mechanical systems, communications equipment, and the commissioning needed to put infrastructure into operation. Delivery also calls for the capacity to manage a large, multi-stage infrastructure project and coordinate design, affordability and approval decisions before construction proceeds. Costain’s selection through an established infrastructure framework illustrates the importance of qualifying for the relevant framework and meeting its allocation process, rather than competing through an open standalone tender.

How relevant is this notice?

Notice Information

Notice Title

South Kensington Station Capacity Upgrade Design and Build

Notice 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.

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-051b55
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/090028-2026
Current Stage
Award
All Stages
Planning, Award

Procurement Classification

Notice Type
UK6 - Contract Award Notice
Procurement Type
Standard
Procurement Category
Works
Procurement Method
Selective
Procurement Method Details
Award under framework
Tender Suitability
Not specified
Awardee Scale
Large

Common Procurement Vocabulary (CPV)

CPV Divisions

45 - Construction work

51 - Installation services (except software)

71 - Architectural, construction, engineering and inspection services

CPV Codes

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

Notice Value(s)

Tender Value
Not specified
Lots Value
Not specified
Awards Value
£85,000,000 £10M-£100M
Contracts Value
Not specified

Notice Dates

Publication Date
23 Sep 20261 months ago
Submission Deadline
Not specified
Future Notice Date
5 Oct 2025Expired
Award Date
17 Sep 20261 months ago
Contract Period
19 Oct 2026 - 18 Jun 2028 1-2 years
Recurrence
Not specified

Notice Status

Tender Status
Complete
Lots Status
Complete
Awards Status
Active
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
London Underground Limited
Additional Buyers

Transport for London

Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
LONDON
Postcode
E20 1JN
Postcode Area
East London
Country
England
Major Region (ITL 1)
TLI London
Basic Region (ITL 2)
TLI4 Inner London - East
Small Region (ITL 3)
TLI41 Hackney and Newham
Delivery Location
Not specified
Local Authority
Newham
Electoral Ward
Stratford Olympic Park
Westminster Constituency
Stratford and Bow

Supplier Information

Number of Suppliers
1
Supplier Name

Costain Limited

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

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The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts.

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