City hall

The Main Building is where you can manage your troops, see how many are defending or trapped, and check which players are assisting you with defenses. Most importantly, at higher levels, it provides a cost reduction bonus for all other constructions.

Level	Clay	Wood	Iron	Food	Gold	food consumption	Costs reduction	Time
1	70	40	60	20	1	1	0	0:00:00
2	90	50	75	25	3	1	0.1	0:18:00
3	115	65	100	35	3	1	0.11	0:22:50
4	145	85	125	40	9	2	0.12	0:27:20
5	190	105	160	55	12	2	0.13	0:32:40
6	240	135	205	70	15	2	0.14	0:38:50
7	310	175	265	90	18	2	0.15	0:46:00
8	395	225	340	115	21	2	0.16	0:54:10
9	505	290	430	145	24	2	0.17	1:03:50
10	645	370	555	185	27	3	0.18	1:15:00
11	825	470	710	235	30	3	0.19	1:28:00
12	1060	605	905	300	33	3	0.2	1:42:50
13	1355	775	1160	385	36	3	0.21	2:00:20
14	1735	990	1485	495	39	3	0.22	2:20:30
15	2220	1270	1900	635	42	3	0.23	2:43:50
16	2840	1625	2435	810	45	3	0.24	3:11:00
17	3635	2075	3115	1040	48	3	0.26	3:42:30
18	4650	2660	3990	1330	51	3	0.28	4:19:00
19	5955	3405	5105	1700	54	3	0.3	5:01:30
20	7620	4355	6535	2180	57	3	0.32	5:50:40