Opened in 1894 the total cost for the design and construction of the tower and buildings was about £290,000. Thats around £29 million at todays prices.
It cost about $550 million to build.
It cost £260,000 to build in 1889
9000$
Eiffel Tower cost 7,799,401.31 French gold francs in 1889
£138.1 million
The Sky Tower cost $50 Million (USD) which is $75 Million (NZD)
total cost of $3.5 mili dollars.
a lot of money
50 billion pounds
The Sears Tower was renamed Willis Tower on July 16, 2009. I'm not sure how much it would cost to build today but I know it is worth over $1 Billion USD today.
USD 100 million