How we select the top construction projects in Wales
We’ve curated the Barbour ABI data to bring you the top construction projects in Wales in 2026. This includes the top construction projects by total value across all sectors with a start date 6 months back, and 6 months forward. Please note that we have excluded all masterplans from our league tables.
CWL2 Data Centre Campus is Top Construction Project in Wales
According to Barbour ABI’s comprehensive planning data, the top construction project in Wales is theCWL2 Data Centre Campus valued at £285m. The Pembroke Power Station project is in second place with a project value of £200m. In third place is the Garn Fach 110MW Wind Farm valued at £110m.
Last Updated: April 2026
Top Construction Projects 2026
Regional Tables: United Kingdom | London | South East | South West | East of England | East Midlands | West Midlands | Northern Ireland | North West | Yorkshire & the Humber | North East | Scotland
City Tables: Birmingham | Liverpool | Manchester | Aberdeen | Cardiff | Nottingham | Glasgow |
| Position | Project | Main Sector | Location | Start Date | Project Value | Project ID | View Project |
|---|---|---|---|---|---|---|---|
| 1 | CWL2 Data Centre Campus | Commercial & Retail | Wales | 01/07/2026 | £ 285,000,000 | 12727863 | View project |
| 2 | Pembroke Power Station, Pwllcrochan – 350MW Battery Storage System | Utilities | Wales | 01/03/2026 | £ 200,000,000 | 12735148 | View project |
| 3 | Garn Fach – 110MW Wind Farm | Utilities | Wales | 11/10/2026 | £ 110,000,000 | 12627431 | View project |
| 4 | Goldborough Road, Hundleton – 350MW Battery Energy Storage System | Utilities | Wales | 01/10/2026 | £ 105,000,000 | 12747933 | View project |
| 5 | Oaklands 50MW Solar Farm & 50MW Battery Storage | Utilities | Wales | 01/10/2025 | £ 88,000,000 | 12627389 | View project |
| 6 | Llantrisant Health Park Phase 1 | Medical & Healthcare | Wales | 20/04/2026 | £ 79,000,000 | 12864335 | View project |
| 7 | Parc Dyffryn Solar Park – 65MW Solar Farm & Battery Storage | Utilities | Wales | 01/10/2026 | £ 65,000,000 | 12551225 | View project |
| 8 | St Richard Gwyn Catholic High School | Education | Wales | 01/11/2025 | £ 64,000,000 | 12709152 | View project |
| 9 | St Fagans Road, Phase 1 – 307 Houses | Residential | Wales | 01/04/2026 | £ 62,760,000 | 12839772 | View project |
| 10 | Carno 3 Wind Farm – 41.6MW Wind Farm | Civil Engineering | Wales | 01/02/2026 | £ 60,000,000 | 11854098 | View project |
| 11 | Llantrisant Road – Phase 1 & Parcel 2C – 186 Houses | Residential | Wales | 13/05/2026 | £ 55,000,000 | 12851711 | View project |
| 12 | The Central Square, Plot 4 & 5 – 528 Apartments & Commercial Space | Residential | Wales | 01/10/2026 | £ 55,000,000 | 12617945 | View project |
| 13 | Puma Energy Site – 20MW Hydrogen Generation Facility | Utilities | Wales | 01/07/2026 | £ 50,000,000 | 12730485 | View project |
| 14 | Former Michaelston College – Wellbeing Village Mixed Development | Residential | Wales | 27/06/2026 | £ 49,142,500 | 12796417 | View project |
| 15 | St Lythans Road – 42MW Parc Worlton Solar Farm | Utilities | Wales | 01/05/2026 | £ 42,000,000 | 12658214 | View project |
| 16 | Caerphilly Train Station Redevelopment | Civil Engineering | Wales | 01/09/2026 | £ 40,320,000 | 12423790 | View project |
| 17 | Mumbles Pier Project | Hotel & Catering | Wales | 01/10/2026 | £ 39,000,000 | 11846558 | View project |
| 18 | Skyline Swansea, Kilvey Hill – Leisure Park | Leisure | Wales | 01/05/2026 | £ 37,000,000 | 12753225 | View project |
| 19 | 22 Newport Road, Adamsdown – Student Flats & Commercial Space | Residential | Wales | 01/12/2025 | £ 35,000,000 | 12288192 | View project |
| 20 | Cardiff & Vale College – Barry Waterfront Campus | Education | Wales | 01/02/2026 | £ 35,000,000 | 12723905 | View project |
| 21 | East Aberthaw – 35 MW Solar Farm | Utilities | Wales | 01/01/2026 | £ 35,000,000 | 12623875 | View project |
| 22 | Foel Trawsnant 35MW Wind Farm | Utilities | Wales | 01/08/2026 | £ 35,000,000 | 12101558 | View project |
| 23 | Mynydd Fforch Dwm – 35MW Wind Farm | Utilities | Wales | 01/09/2026 | £ 35,000,000 | 12637123 | View project |
| 24 | Pembroke Power Station, Pwllcrochan – Hydrogen Production Facility | Utilities | Wales | 17/01/2026 | £ 33,000,000 | 12801587 | View project |
| 25 | Royal Alexandra Hospital – North Denbighshire Community Hub | Medical & Healthcare | Wales | 01/07/2026 | £ 33,000,000 | 12521408 | View project |
| 26 | Royal Alexandra Hospital – Same Day Emergency Care Facility | Medical & Healthcare | Wales | 01/08/2026 | £ 33,000,000 | 12878736 | View project |
| 27 | Coed Ely – Plot C4 Industrial Unit | Industrial | Wales | 01/07/2026 | £ 30,937,000 | 12755737 | View project |
| 28 | Usk Way – 122 Flats & Retail Units | Residential | Wales | 01/04/2026 | £ 30,448,448 | 12595589 | View project |
| 29 | Brynhir, New Hedges – 125 Dwellings | Residential | Wales | 30/06/2026 | £ 30,000,000 | 12448066 | View project |
| 30 | Brynrhyd Farm – 30MW Solar Farm | Utilities | Wales | 01/06/2026 | £ 30,000,000 | 12627388 | View project |
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Top Construction Projects across the UK
Barbour ABI tracks and reports on projects happening across the UK from pre-planning stages right through to completion. Our 3,000 happy clients use this data to supply their products and services on projects that are right for them, with the most up-to-date contact information available on the market.
Top Construction Companies
Access the top 100 construction companies in the UK. The companies include top contractors, architects and clients and are ranked by total value of projects across a 12-month period and can be filtered by role, number of projects, value, and links straight to the Barbour ABI project leads platform. View the top construction companies overall in the UK such as London as well as major regions and cities.
Tender League Tables
Monthly Top 50 League Tables from Barbour ABI
Barbour ABI’s Top 50 League Tables is designed to provide company intelligence for those working within construction and beyond. We report on the top 50 clients, architects and contractors for the month, as well as the last 12 months.
We publish these league tables directly on our website each and every month for free.
