Updated 27 October 2026 · from filed accounts
The biggest construction companies in London
Morgan Sindall Group is the biggest company among the construction companies registered in London by turnover, with £5.02bn in its latest filed accounts. Galliford Try Holdings and Costain Group follow. Together the 10 companies below turned over £10.1bn in their latest filed years.
- 1
Morgan Sindall GroupLondon · Building & construction · FY to Dec 2025
£5.02bn
+10% on the year before
- 2
Galliford Try HoldingsUxbridge · Building & construction · FY to Jun 2026
£1.93bn
+3.0% on the year before
- 3
Costain GroupLondon · Building & construction · FY to Dec 2025
£1.05bn
-16% on the year before
- 4McAleer & Rushe Contracts UK
London · Building & construction · FY to Dec 2025
£628m
+28% on the year before
- 5
British LandLondon · Building & construction · FY to Mar 2026
£523m
+15% on the year before
- 6Danny Sullivan & Sons
London · Building & construction · FY to Dec 2024
£241m
+67% on the year before
- 7
Amey RailLondon · Building & construction · FY to Dec 2025
£230m
-3.4% on the year before
- 8
HammersonLondon · Building & construction · FY to Dec 2025
£211m
+75% on the year before
- 9Parkeray Interiors
London · Building & construction · FY to Dec 2025
£168m
+26% on the year before
- 10Metka - Egn
London · Building & construction · FY to Dec 2024
£150m
+31% on the year before
How this list is made
From each company's latest accounts filed at Companies House, or its annual report for listed groups: the figures as filed, nothing estimated. Changes compare the two latest filed years. Only companies that report in pounds are ranked; groups that report in dollars or euros aren't converted. Subsidiaries whose figures are part of a listed group's are counted once, in the group. Updated daily as new accounts are filed.