1. Olympic Stadium

The Olympic Stadium was originally estimated to cost £280m, but, the price tag had risen to £429m. It was then announced in 2015 that the overall bill for Stratford’s Olympic Stadium had soared to over £700m, for converting the stadium into a suitable base for football and athletics.

2. The Shard

The Shard was completed in 2013 and is an iconic feature of the London skyline. The Shard was expected to cost no more than £350 million to build, but figures on completion showed the total construction cost to be £435m.

3. BBC Headquarters

It is hard to imagine how a refurbishment of an existing building could be so over-budget, but the BBC overspent by £110 million when refurbishing the Broadcasting House. The project was originally estimated to cost £991 million and be finished by the end of December 2008, however, it took another six years to complete.

4. Wembley Stadium

The original planned cost was £757m, but a variety of issues relating to the design and groundworks saw the costs climb to approximately £1bn.

5. Montreal Olympic stadium

This building went 20 times over its original budget. Despite the harsh deadline, it was surprisingly completed on time, just way over budget.

6. Sydney Opera House

This iconic building was completed 10 years after the deadline. It also costs more than 14 times the original budget. The architect Jorn Utzon quit the project after a string od disputes which caused most of the delay. 

7. Scottish Parliament building

Completed 3 years late and nearly 10 times over the original budget. 

8. The empire state building

This building is the literal icon of New york. This amazing monument was finished one year before the estimated year of completion, however, it cost double the original budget.

9. Denver International Airport

This beautiful building was a nightmare for everyone involved. Not only did this go 3 billion dollars over budget, but it was also completed 2 years after the deadline.

10. Sagrada Familia Cathedral

There is not an architect alive who does not recognize this beautiful one of a kind structure. This breathtaking beauty by Antoni Gaudi is as legendary as iconic. When Gaudi suddenly passed due to an accident the building was only 15% completed. Though it is impossible to say by how much the building went over, the building is still under construction to date and is estimated to be completed in 2026. More than 150 years after the construction began.