Supplier · Large organisation

Costain Limited

Costain Limited has won 15 UK public contracts worth £1.34bn since 1 Jun 2023. See its competitors in construction work.

Company 00610201Companies House record Based in LondonFirst contract 1 Jun 2023Latest contract 19 Jun 2026

Contracts: 15
Published value: £1.34bnwhere stated
Without competition: 20%3 contracts
Won by SMEs: 0%of 13 with size known

Contracts won per month, last 24 months 14 contracts · busiest month April 2026

Nov 24
Feb 25
May 25
Aug 25
Nov 25
Feb 26
4
May 26
Aug 26

Biggest customers

National Highways Limited 5 contracts · £125m
Nuclear Restoration Services Limited 3 contracts · £71.9m
Sellafield 1 contract · £1.06bn
Norfolk County Council 1 contract · £53.9m
Mag Airport Limited 1 contract · £22.4m
City of Bradford Metropolitan District Council 1 contract · £2.08m
DfTc - Department for Transport 1 contract · £467k
Blackburn with Darwen Borough Council 1 contract · £150k
Port of Dover 1 contract · —

What they supply

Construction work 6 contracts · £1.31bn
Architecture & engineering 5 contracts · £25.1m
Research & development 4 contracts · £1.67m

Competitors in construction work

Sector overview

Tarmac Trading Limited SME 37 contracts · £90.7m
Holcim UK 37 contracts · £37.6m
Thomas Bow Ltd SME 36 contracts · £8.06m
Lindum Group Limited 32 contracts · £54.8m
Trust Utility Management Ltd SME 31 contracts · £5.4m
JP Developers Ltd SME 31 contracts · £320k

These are the suppliers with the most construction work contracts in the last two years, which is where Costain Limited wins most of its work. They are not necessarily bidding for the same contracts. See the whole sector.

All contracts won by Costain Limited

Contracts won by Costain Limited
Date	Contract	Buyer	Value
19 Jun 2026	THRE0081 - Border Control Post (BCP) and Control Point (CP) Infrastructure Technical and Commercial Advisory Services (On behalf of DEFRA) No competition	DfTc - Department for Transport	£467k
22 May 2026	West Winch Housing Access Road	Norfolk County Council	£53.9m
13 May 2026	S30100 EV Charge Point Strategy and Delivery Plan	National Highways Limited	£212k
4 May 2026	Port of Dover - Project Contractors Framework - Tranche 2 (projects each over £3million) - AWARD	Port of Dover	—
29 Apr 2026	Strategic Transport Support Services	Blackburn with Darwen Borough Council	£150k
21 Apr 2026	S30074 Floating Bus Stops - Research, Testing and Trials	National Highways Limited	£304k
15 Apr 2026	Highways Services Strategic Delivery Partner (SDP4) No competition	City of Bradford Metropolitan District Council	£2.08m
2 Apr 2026	S30077 Road Safety Analysis and Reporting (STATS19)	National Highways Limited	£955k
16 Mar 2026	S30079 NH Development Centre Supervision	National Highways Limited	£200k
9 Feb 2026	SGHWR - D60 Crane - Scope Development	Nuclear Restoration Services Limited	£49,665
30 Jan 2026	ID6064 Capital Investment Consultancy Services Framework: Project Services - South	Mag Airport Limited	£22.4m
21 Jan 2026	M5 Bridgwater	National Highways Limited	£123m
10 Oct 2025	Infrastructure Delivery Partnership (IDP)	Sellafield	£1.06bn
2 Oct 2025	Trawsfynydd Reactor Buildings Height Reduction	Nuclear Restoration Services Limited	£71.8m
1 Jun 2023	Decommissioning & Asbestos Removal (DAR) framework No competition	Nuclear Restoration Services Limited	£1

Contracts are matched to this supplier by company name as published in each notice. If a company appears under slightly different names, some of its contracts may be listed separately. How matching works.