Senedd
Timeline of cost increases and time delays

Construction period
Date
Estimated and final cost
Estimated completion date
Notes
Phase 1 including selection processes
July 1997
c£12M
April 2001
The first estimate by the Welsh Office in the A Voice for Wales white paper.
Phase 1 including selection processes
16 October 1998
£11.6M (total) £8.4M (construction)
-
RRP estimated cost at time of the design selection process.
Phase 1 including selection processes
January 2000
£22.8M
-
Revised estimate by RRP after changes to the design of the building by the National Assembly.
Phase 1 including selection processes
March 2000
£26.7M
January 2003
Estimate produced by Turner and Townsend for the National Assembly.
Phase 1 including selection processes
May 2001
£37M – £47M (total) £28M (construction)
-
Estimate from a 3-day workshop by the National Assembly and all contractors involved in the project.
Phase 2
September 2001
-
July 2004
-
Phase 2
January 2003
£29.3M (construction)
-
Estimate from Taylor Woodrow, Schal and Northcroft, which was based on an incomplete design.
Phase 2
30 May 2003
£41M (construction)
August 2005
Tender submission by the Taylor Woodrow Strategic Alliance Partnership after value engineering.
Phase 2
July 2003
£66.1M (total) £48.2M (construction)
-
The final construction lump sum offer made by the Taylor Woodrow Strategic Alliance Partnership.
Phase 2
7 February 2006
£69.6M (final total cost) £49.7M (final construction cost)
Completion date
The total project cost, including £7.5M from phase 1.
1 March 2006 (Royal opening ceremony)
1 March 2006 (Royal opening ceremony)
The project was 580% over budget compared with the original budget forecast in April 1997 (phase 1) and was four years and 10 months late.
The project was 580% over budget compared with the original budget forecast in April 1997 (phase 1) and was four years and 10 months late.
The project was 580% over budget compared with the original budget forecast in April 1997 (phase 1) and was four years and 10 months late.
Sources: National Audit Office Wales, Accommodation Arrangements for the National Assembly for Wales and Wales Audit Office, The Senedd
Sources: National Audit Office Wales, Accommodation Arrangements for the National Assembly for Wales and Wales Audit Office, The Senedd
Sources: National Audit Office Wales, Accommodation Arrangements for the National Assembly for Wales and Wales Audit Office, The Senedd
Sources: National Audit Office Wales, Accommodation Arrangements for the National Assembly for Wales and Wales Audit Office, The Senedd
Sources: National Audit Office Wales, Accommodation Arrangements for the National Assembly for Wales and Wales Audit Office, The Senedd

Question: How much did the cost of the Senedd increase by from 1997 to 2006?
Answer: The cost of the Senedd increased from £12M in 1997 to £69.6M in 2006, an increase of 580%.