Scottish and Southern Energy top company in construction in Wales
We’ve curated the Barbour ABI data to bring you the top companies in construction in Wales. This includes the top contractors, architects and clients by total value of projects across a 12-month period. Learn how to use the league tables here.
The latest data for the top companies in construction in Wales sees client Sottish and Southern Energy in first place with nine projects valued at £493m. In second place we have client Welsh Assembly Government with five projects valued at £299. Finally in third place on our league table we have client Energy Saving Trust with one project valued at £256m.
Top Construction Companies 2025
Regional Tables: United Kingdom | London | South East | South West | East of England | Manchester | East Midlands | West Midlands | Northern Ireland | North West | Yorkshire & the Humber | North East | Scotland
| Position | Company | Role | Project Count | Value | View Projects |
|---|---|---|---|---|---|
| 1 | Scottish & Southern Energy | Client | 9 | £ 493,000,000 | View projects |
| 2 | Welsh Assembly Government | Client | 5 | £ 298,760,000 | View projects |
| 3 | Energy Saving Trust | Client | 1 | £ 256,485,000 | View projects |
| 4 | Velindre NHS Trust | Client | 1 | £ 180,000,000 | View projects |
| 5 | Wynne Construction | Contractor | 12 | £ 133,381,209 | View projects |
| 6 | Powell Dobson Architects | Architect | 8 | £ 85,131,000 | View projects |
| 7 | Pembrokeshire County Council | Client | 8 | £ 76,000,000 | View projects |
(Source: Barbour ABI, updated January 2025)
How to use the league table
- View the highest value construction projects within the selected region
- Use the arrows at the top of each column to:
- sort by project start date
- sort by construction project value
- alphabetise construction sectors
- alphabetise by location
- Use the search bar to find specific construction projects
- Select the regions to view the top construction projects in your target area
*construction project data visibility will depend on Barbour ABI subscription criteria.
Top Construction Projects
Access the top 100 construction projects happening in the UK. The projects are ranked by total value of projects across a 12-month period and can be filtered by sector, location, start date, value, and links straight to the Barbour ABI project leads platform. View the top construction projects overall in the UK as well as major regions and cities.
Tender League Tables
View the latest and hottest projects out to tender in the UK. Filter by value, location, number of bidders, start dates, and link straight to the Barbour ABI project leads platform to see the project in full detail. The Tender League Tables are separated by sector to give you the most insights on construction activity in your field.
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.
