| | 1989 | | Design competition for T5 is won by Richard Rogers Partnership |
| BAA submits a planning applications | | 1993 | | |
| | 1995 | | T5 public enquiry begins |
| T5 public enquiry finishes | | 1999 | | |
| | 2001 | | Temporary works and archaeology takes place and construction begins |
| Secretary of state for transport grants planning consent | | 2002 | | |
| | 2003 | July | A full size section of the T5 roof is erected in Yorkshire to 'prove' the construction and erection process off the construction critical path |
| A full scale section of the T5 baggage system is constructed and tested | August | | |
| | November | Work begins on the steel superstructure of the main terminal building |
| The first of two rivers running through the T5
site is diverted around the airport perimeter | February | 2004 | | |
| | March | The Piccadilly line extension westbound tunnel is finished ten days early |
| The first of T5's six 2,500 tonne roof sections is 'strand-jacked' into position | April | | |
| | July | The main power source to the new terminal development is switched on |
| The 900 tonne visual control room of the new air
traffic control tower is successfully moved two kilometres across
Heathrow's airfield | October | | |
| | 2005 | January | Construction of the satellite terminal is 65 percent complete |
| The T5 project hits the half way mark with 22
million man-hours worked | February | | |
| | April | The new air traffic control tower is topped out |
| The new Airbus A380 superjumbo overnights at Terminal
5 on it s first visit to the northern hemisphere for compatibility
tests at Heathrow | May | 2006 | | |
| | November | T5B, the satellite terminal, is virtually complete |
| The new air traffic control tower becomes operational | April | 2007 | | |
| | May | The big clean of the terminal's steel work and glass facades begins |
