Alrn
01-17-2019

New buildable colony building 'Industrial Storehouse' that can increase a number of trade goods at wares market in colony. Requires Wood 30 + Stone 70 + 500.000 Ducats.

Wsp
02-01-2019

According to Calicaddy, it appears this building stacks with itself. It is estimated each building increases 25% of the type available. Thus 3 x wares storehouses increases about 75% of the trade type 2 goods available. Also, not sure if this can additionally stack with the west indies trading building, but it effectively makes the aforementioned building obsolete as these buildings are not limited to the 3 'special' building types per colony.

Alienor
06-17-2020

You can build 3 storehouse of each type, which make 12 buildings if you build them all.

Storehouse bonus stacks with the west indies one.
I had food n wares all built when i saw Wsp's comment, so i checked that with luxury goods storehouse where i have 1 trade good. With garlic, i got, West indies alone : 166, +1 storehouse : 207, +2 storehouses : 247.
With third storehouse, my trade goods set has changed and i got oreganum, which bring me to the last subject of this post.

Storehouses give AITC points.
In view of the change in available goods, i estimate those points at 30 in each category.