Castle and Buildings

Your castle is the backbone of progression in Top Heroes. Every major system — from troop training to relic crafting — is gated behind specific building levels. Understanding the upgrade order and prerequisite chain is the difference between efficient and stalled progression.

Core Buildings

Building	Primary Role
Castle	Main hub; all other buildings and systems unlock through castle level
Research Cottage	Unlocks the research tree and accelerates research speed
Hospital	Treats wounded troops after battles; capacity scales with level
Guild	Powers guild contributions, guild tech, and guild-related events
Training Ground	Sets troop training capacity and training speed
League Barracks	Trains League faction troops; added to prerequisites at higher castle levels
Horde Barracks	Trains Horde faction troops
Nature Barracks	Trains Nature faction troops

The Prerequisite Pattern

Castle upgrades follow a strict alternating prerequisite pattern:

• Odd-numbered castle levels (21, 23, 25…): require Research Cottage + Hospital at the matching level
• Even-numbered castle levels (22, 24, 26…): require Guild + Training Ground at the matching level

You must upgrade all four core buildings in lockstep with your castle. Falling behind on any single building will block your next castle upgrade. From Castle 47 onward, faction Barracks join the prerequisite chain.

Resource Costs: Castle Levels 21–40

A second resource requirement appears from Level 29 onward. Values are from a verified 2025 infographic.

Level	Resource 1	Resource 2	Prerequisites
21	2.04m	—	Research Cottage 20, Hospital 20
22	2.30m	—	Guild 21, Training Ground 21
23	2.68m	—	Research Cottage 22, Hospital 22
24	3.55m	—	Guild 23, Training Ground 23
25	5.76m	—	Research Cottage 24, Hospital 24
26	6.00m	—	Guild 25, Training Ground 25
27	7.12m	—	Research Cottage 26, Hospital 26
28	8.55m	—	Guild 27, Training Ground 27
29	9.97m	1.33m	Research Cottage 28, Hospital 28
30	11.8m	2.27m	Guild 29, Training Ground 29
31	13.7m	3.23m	Research Cottage 30, Hospital 30
32	17.5m	4.18m	Guild 31, Training Ground 31
33	21.3m	5.22m	Research Cottage 32, Hospital 32
34	30.4m	6.36m	Guild 33, Training Ground 33
35	36.1m	11.4m	Research Cottage 34, Hospital 34
36	47.5m	16.1m	Guild 35, Training Ground 35
37	61.7m	—	Research Cottage 36, Hospital 36
38	90.2m	28m	Guild 37, Training Ground 37
39	118m	38.9m	Research Cottage 38, Hospital 38
40	147m	54.1m	Guild 39, Training Ground 39

Resource Costs: Castle Levels 41–65 (Servers 108+)

Higher-level servers use a different resource structure from Level 41 onward. Resource columns are icon-based in-game; R1 is a rare material in small quantities, while R2 and R3 scale into the tens-to-hundreds of millions. Faction Barracks join the prerequisite chain at this range.

Levels	R1	R2	R3	Notable Prerequisites
41–44	126	17.1m	99.7m	Research Cottage 40, Hospital 40 (Lv41)
45	126	22.8m	133m	Brilliance Level 1
46–49	151	28.5m	166m	League Barracks 45, Guild 45 (Lv47)
50	151	42.7m	249m	Brilliance Level 2 — +5 Hero Levels
51–54	227	37m	216m	Horde Barracks 50, Hospital 50 (Lv52)
55	227	37m	216m	Brilliance Level 3
56–59	303	39.9m	116m	Nature Barracks Brill. Lv3, Guild Brill. Lv3 (Lv57)
60	303	39.9m	116m	Brilliance Level 4 — +5 Hero Levels
61–64	388	45.6m	133m	Hospital Brill. Lv4, Any Barracks Brill. Lv4 (Lv62)
65	388	45.6m	133m	Brilliance Level 5

Brilliance Milestones

Brilliance is a castle enhancement system that activates every 5 castle levels starting at Level 45. Two milestones grant direct hero power increases — these are the most impactful milestones in the game and should drive your planning targets.

Castle Level	Brilliance	Effect
45	Level 1	Castle Brilliance unlocked
50	Level 2	+5 Hero Levels
55	Level 3	—
60	Level 4	+5 Hero Levels
65	Level 5	—

The +5 Hero Level bonuses at Brilliance 2 and 4 compound across all combat systems. Make Castle 50 and Castle 60 your primary mid- and late-game targets.

Upgrade Priority

Free-to-Play

Keep all four core buildings within one level of your next Castle upgrade requirement at all times. Letting any single building lag will freeze Castle progress and stall your entire account.

• Prioritise Hospital capacity early — wounded troops that exceed Hospital capacity are permanently lost
• Stockpile resources before unlocking each Castle level to avoid long wait times mid-upgrade chain
• Castle 50 (Brilliance 2) is the most important medium-term milestone to work toward

Spenders

With a permanent 2nd Construction Queue, you can upgrade two buildings in parallel and cut your upgrade timeline roughly in half. This single purchase is among the highest-value investments in the game for progression speed.

• 3rd Construction Queue (available via Monthly Pass) adds further parallel building capacity
• Use speed-ups strategically during Guild Arms Race Construction phases for double event value

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Use the Castle Upgrade Calculator to plan exactly how many resources you need to reach your next milestone.