Use the clash wikia and search for the building, that's how you find levels. The pages are very top heavy with "useless crap" gives good pointers, but the tables you really want are way to far down at the bottom. But yeah, it shows upgrade cosy, th level, dps,damage per shoot, upgrade time, etc. This is cool.
The level 11 Town Hall was added as a part of the December 10, 2015 update. This same update also made the town hall a resource building, and can now be targeted by Goblins. Also, Town Hall Level 10's cost got increased from 4,000,000 to 5,000,000 in the same update. The level 10 Town Hall was added as a part of the May 23, 2013, "Fiery Golem too will have two upgrades before moving to peak level 4. The witch will upgrade to max level 2. Lava hound will become might for town hall 9 at max level 2. Elixir Spells Upgrades at Town hall level 9 Clash of Clans: Max Hero Levels at TH13 Heroes are the strongest and most powerful units in Clash of Clans. They are fearless warriors, each with their unique abilities and strengths. You get access to all of the heroes once you reach TH13.