What is "soured aesthetic“?

Solution 1:

"Soured" is a typo.

The original paragraph:

Material choices take into consideration the temperate nature of the space with a ready- made or common soured aesthetic with the potential refit only one season away. Along with the paired back structures and material simplicity the sense of a warehouse / commune / traditional market feel is imparted on customers. This buzz associated with a dense trading environment supplemented because of the potential for Ad-hoc / organic planning permutations.

We can see that "common soured" is more or less synonymous with "ready-made", which is a style of art initiated by Duchamp that takes materials that already exist and casts them as art. Readymade can be read as "already made" – nothing was made custom for the space.

With this context clue we can interpret "common soured" to be a typo of "common sourced".