One of the features that will arrive  with 1.3 is structure upgrading. Towers, walls, gatehouses, lumberyards, mines, and farms will all be upgradable. These upgrades will can currently do 3 things: increase health, increase attack damage, or increase productivity. I figured now would be a good time to put out some solid numbers for those that are interested. For the most part the base numbers are identical to 1.2.5. The only major changes (for these numbers) in 1.3 are upgrades.

Upgrades can be manually triggered from Inspect mode, or you can set a settlement to automatically upgrade through the Work Settings menu (called the Work Designations menu in 1.2.5).

Defensive Structures

Economic Structures

* - New in 1.3

A Note on Time

Bronze Age is turn based. The game aims for 5 turns per second, though as the game hits performance problems this may slow down.

Each house consumes 1 Food every 300 turns (in 1.2.5 it is every 600 turns).

Each barracks consumes 1 Food every 300 turns for each warrior inside.

I'd be happy to answer any other mechanics questions. I'm aiming for the release of 1.3 by next week.

Wealth

The wealth of a settlement is based on the structures, wagons, and pigs in the settlement. In 1.2.5 items also added wealth, but that has been removed in 1.3 for being too easily abused.

Each pig in a Pasture, or wagon in a Tradehouse gives 5 wealth.

Each finished structure adds wealth depending on its type:

Brickworks, Houses, and Walls provide 1 wealth each.

Bakeries, Farms, Lumberyards, Pastures, Storehouses, and Trade Depots provide 2 wealth each.

Gatehouses, Mines *, Towers and Training Grounds provide 3 wealth each.

Barracks, Smelters and Tradehouses provide 4 wealth each.

Copper Statues*  provide 20 wealth each.

* - New in 1.3