If an apartment was built in the 1980's, how much cheaper would it be than say a brand new apartment of a similar quality and same size?

Lets also assume that the brand new apartment was also in the same location. On average, what would be the value percentage difference between a brand new apartment under these parameters and a similar quality apartment built in the 1980's? Also under the same parameter, what would be the value percentage... show more Lets also assume that the brand new apartment was also in the same location.

On average, what would be the value percentage difference between a brand new apartment under these parameters and a similar quality apartment built in the 1980's?

Also under the same parameter, what would be the value percentage difference on average between say an apartment built in 2014 and a similar apartment built in the 1980's?

I want to get an idea as to how much the age of a 1980's property, will take away from its current value, by comparing it with it's more modern equivalents.
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