The construction industry of the United Kingdom contributed gross value of £64,747 million to the UK economy in 2004. The industry employed around 2.2 million people in the fourth quarter of 2009. There were around 194,000 construction firms in Great Britain in 2009, of which around 75,400 employed just one person and 62 employed over 1,200 people. In 2009 the construction industry in Great Britain received total orders of around £18.7 billion from the private sector and £15.1 billion from the public sector.
The largest construction project in the UK is Crossrail. Due to open in 2018, it will be a new railway line running east to west through London and into the surrounding countryside with a branch to Heathrow Airport. The main feature of the project is construction of 42 km (26 mi) of new tunnels connecting stations in central London. It is also Europe's biggest construction project with a £15 billion projected cost.
Prospective construction projects include the High Speed 2 line between London and the West Midlands and Crossrail 2.