You need to specify what strucutre you are referring to if you want to make it possible to answer your question.
10 years!
how long does it take to build a asimo
how long did it take to build the half moon
how long did it take to build the scottish parliment?
how long did it take to build cabot tower
The cost of building the entire Kremlin is not known. However the cost to build the largest structure there was 11 million rubles. That is the Grand Kremlin Palace.
hs2 will take 15 years to build
how long does it take to build a beam bridge of 2400 sq ft
the Great 500,000 years old. The current reef's structure of it is less than 8,000 years old.
it took 3 years
How long did it take to build st James cathedral london
It can take a colony of ants anywhere from a few hours to a few days to build an ant hill, depending on the size of the colony and the complexity of the structure they are constructing.