🏗️ Buildings

Every building in your city is a single structure that levels up. As its level rises, its production, capacity or effect grows. No building can exceed the castle level, which is why upgrading the castle always comes first (see Getting Started).

Plots

Each building level takes up one building plot. Your total number of plots grows with the castle:

• You start with 2 plots, and each castle level adds +8 plots.
• Each level of the Urban Planning technology gives +1 plot.

Building list

Economy buildings

Building	Function
🏠 House	Raises the population limit by +12% per level (compounding; +8% per level after Lv30). Also required to upgrade the castle.
🌾 Farm	Farmers produce food
🪓 Lumber Camp	Produces wood
⛰️ Quarry	Produces stone (unlocked by Masonry)
⛏️ Mine	Produces iron (unlocked by Ironworking)
🏚️ Warehouse	Protects resources from plunder: Lv1 5%, +1% per level
📚 Library	Scholars process science orders
🏛️ Academy	A more efficient science building than the Library (unlocked by Writing)

The worker capacity of production buildings grows with level. Capacity doubles every 10 levels. The Workers' Guild technology increases capacity further.

Military buildings

Each unit type has its own building:

Building	Unit	Unlocking technology
🛡️ Barracks	Swordsman	Art of War
🔱 Spear Hall	Spearman	Art of War
🎯 Archery Range	Archer	Archery
🐴 Stable	Cavalry	Horsemanship
🛠️ Siege Workshop	Siege	Siegecraft
⚜️ Paladin Hall	Paladin	Chivalry
🐉 Dragon Lair	Dragon	Dragonlore

The Barracks and the Spear Hall are separate buildings. The Barracks trains only swordsmen, and the Spear Hall trains only spearmen. The level of each military building also adds a little to the number of units your heroes can lead in one march.

💡 A building is not enough to train dragons: each dragon uses up one 🥚 Dragon Egg. Eggs drop from attacks on dragon lairs on the map.

Special buildings

Building	Function
🏯 Inn	Where you recruit heroes. Its level sets your hero roster size and the power of the heroes you get.
🎓 Training Hall	Trains heroes for gold over a set time. Longer training sessions unlock as the level rises.
🕵️ Spy Den	Increases your espionage score by level × 100 (unlocked by the Espionage technology)
🏥 Hospital	Heals wounded soldiers
🔧 Repair Shop	Repairs damaged siege weapons
🏛️ Guild Center	Lets guild members help with your construction and research. +4 help slots per level (up to Lv20).
⛺ Guild Camp	Hosts reinforcement armies sent by your guild mates in your capital; when you are attacked, they fight beside you outside the castle. Capacity Lv1 5,000 troops, ×1.1 per level. Unlocked by Art of War. Details on the Guild page.

Castle, walls and towers

The castle, the walls and the four archer towers also use the construction queue and level up:

• Castle: Each level gives +5% defense and 500 garrison capacity. Castle construction takes 2.5 times as long as a building of the same level.
• Walls: Each level gives +4% defense (3 times the time). In a city battle, the main job of the wall is its health, which keeps the attacker outside until it is destroyed (see Combat).
• Archer towers: Each tower holds 100 archers per level (2 times the time). Archers in towers are much more effective in defense.

If your castle has been attacked and taken damage, it cannot be upgraded until it is repaired (see Economy).

Builders and the queue

Your number of builders sets how many constructions can run at once:

Source	Builders
Starting	1
With gems (Buildings screen)	200 💎 → +1 for 8 hours; buying again extends the time (up to 72 h)
VIP 6 and above	+1
Builder item (8 h / 24 h / 3 days)	+1 for the duration

Queue slots let you line up jobs beyond your builders. You start with no queue. On the Buildings screen you can buy +1 slot for 8 hours for 150 💎; buying again extends the time (up to 72 h). Slots and builders bought permanently in the past stay in place. From VIP 6 on, you get 2 to 6 extra slots depending on your VIP level.

The number of builders and queue slots is shared across all your cities.

Construction time and speedups

The first levels take seconds, while advanced levels take days: without bonuses, an average building reaches Lv10 in 1 hour, Lv20 in 1 day and Lv30 in 6 days. Each building has its own time multiplier (the House is the fastest, the Dragon Lair the slowest). The detailed table is on the Economy page. Ways to shorten the time:

• Technology: Civil Engineering (+5% speed per level)
• VIP, global bonuses, nation and hero skills
• Ad boost: construction speed that grows the more you watch (×1.05 → ×1.5)
• Speedup items: A Construction or General speedup cuts the time instantly (see Bag and Items)
• Guild help: Your guild members shorten your time with "Help". Each help cuts 0.4% of the job's time (up to 2% with the Helping Hand technology), but at least 2 minutes; help can shorten a job by at most 60% in total.

Automatic speedup

In the speedup window, the ⚡ Recommended section calculates the most economical combination of speedups to finish the job; ⚡ Use automatically applies it with one tap.

• Speedups specific to that queue (construction, technology, training, healing) are used first. General speedups are only used for the remaining time when the specific ones are not enough.
• The plan brings the job below 1 minute. If your VIP has unlocked free finishing, the plan leaves a 5-minute margin and the job finishes for free (VIP 4: constructions under 5 minutes, VIP 6: research under 5 minutes).
• The window also shows how much time the plan would waste.

Targeted speedup

When using a speedup or the bonus pool, you can choose which job to speed up. The speedup is applied to the job you chose, not the first job in the queue. This matters when several of your builders are working at the same time.

You do not even need to go to the Buildings screen for the castle, walls and towers. On the castle, wall and tower pages of the Army screen and on the Buildings ▸ Castle card, a ⚡ time button appears while the job is running. This button speeds up that job directly.

Construction bonus pool

When your construction queue is empty, time is not wasted. Every 5 idle seconds add 1 second of bonus to the pool. The pool's cap is 15 minutes. With the Site Ledger and Grand Archive technologies, this cap rises up to 8 hours. You can spend the stored time on any construction whenever you like. The construction pool is city-specific.

Troop training

Training speed

Each level of a military building increases that unit's training speed by +5%. Technologies such as Mobilization also speed up training.

Concurrent training capacity

The total army in your city is unlimited. However, the number of soldiers that can be trained at the same time in a building depends on the building's level:

Capacity = building level × 20, and once the building reaches Lv10, this value is permanently ×2.

Building level	1	5	9	10	15	20
Training at once	20	100	180	400	600	800

The Conscription technology (+10% per level) and the guild technology Muster Grounds (+15% per level) raise this cap by a percentage. Finished soldiers leave the queue and free up space. If you ask for 100 soldiers but only have room for 60, the game produces 60. The button shows you how many soldiers will actually be produced.

💡 Tip: Taking a military building to level 10 doubles its capacity at once (180 → 400). This is an important threshold.

Hospital and repair shop

In battle, most of your soldiers do not die, they are wounded. The wounded go to the hospital, and damaged siege weapons go to the repair shop.

Building	Base capacity per level
🏥 Hospital	125 wounded
🔧 Repair Shop	31.25 siege (rounded down)

Capacity doubles every 10 levels. Formula: base × level × 2^(level ÷ 10). For example, without technology a Lv10 hospital holds 2,500 wounded, Lv20 10,000, Lv30 30,000, Lv40 80,000 and Lv50 200,000; the repair shop holds Lv10 625, Lv20 2,500, Lv30 7,500, Lv40 20,000 and Lv50 50,000 siege weapons. The Field Hospital and Field Repair Shop technologies increase capacity by 8% per level (up to +320%), and the guild technologies Guild Infirmary and Repair Corps by 10% (up to +200%); the two stack.

If capacity is full, the wounded who do not fit die. Expand your hospital before big battles.

Healing and repair:

• Are started manually; they do not start on their own.
• Cost 1/20 of the unit's training cost.
• Take 1/20 of the training time. The Surgery technology shortens this.
• The hospital heals only one unit type at a time. The repair shop works independently of the hospital.
• Hospital occupancy is waiting + currently healing wounded. Starting healing does not free up space; space opens as healed units leave.
• With VIP 7, you can turn on 🤖 Auto-heal in Army ▸ Hospital: while the game is open, the wounded are healed automatically.