Building
Mint
A mint was where royal moneyers struck silver pennies by hand, placing a blank between two iron dies and striking with a hammer. Mints operated in many English towns: 30 were employed for Henry II's recoinage of 1158, reduced to 12 afterwards, and Short Cross pennies from 1180 were struck at about eleven, including London, York, Winchester, Lincoln and Carlisle. Moneyers were often burgesses and put their names on the coins.
Caveats (confidence: high)
Numbers fluctuated through the century; earlier in the 12th century there were many more mints.
Sources: en.wikipedia.org · cumbriacountyhistory.org.uk
Built from
Not built by a house: it comes with the town.