Last Asylum Sanctuary Upgrade Requirements

Published: 2026-10-23

Sanctuary upgrade requirements run from level 2 to the level 30 cap, and every level from 4 on asks for specific buildings first, such as Walls, the Research Lab and Training Grounds. At base values the whole path from level 2 to 30 costs 5.03 billion Grain, the same amount of Timber and 1.60 billion Herb, and takes 398d 20h 41m of build time. Look up your next level in the table, or enter your levels in the planner.

Sanctuary Requirements by Level

Every value here is a base cost, before Construction Speed bonuses and cost reductions. The Research Lab is also known as the 1st Lab. Level 1 is already built, so the table starts at level 2. Values checked in October 2026. The full building list is on the buildings page.

Sanctuary Upgrade Planner

Pick your current level, your target level and your Construction Speed bonus. The planner adds up Grain, Timber, Herb and build time for that span and lists the buildings you need on the way.

Current level

Target level

Construction Speed, %

Level 20-30 Requirements

Sanctuary Level 20 Requirements

Level 20 needs Research Lab 19, Alliance Hall 18 and Farm 10. The upgrade costs 60.03M Grain, 60.03M Timber and 18.41M Herb, and the build takes 4d 23h 40m. After it, the hero level cap is 100.

Sanctuary Level 21 Requirements

Training Grounds 20 and Lumberyard 10 stand beside Research Lab 20 on this level. You pay 85.45M Grain and Timber plus 27.64M Herb. The build time of 6d 16h 20m is the longest one that still finishes inside a week. The hero cap goes up to 105.

Sanctuary Level 22 Requirements

Here the build time passes one week for the first time and reaches 8d 16h 26m. The list asks for Research Lab 21, Warrior Statue 21 and Herb Garden 10, and the cost is 111.2M Grain, 111.2M Timber and 36.66M Herb. Your heroes can reach level 110 afterward.

Sanctuary Level 23 Requirements

Infirmary 22 comes back to the list, together with Research Lab 22 and Granary 10. Prepare 145.2M Grain, 145.2M Timber and 42.76M Herb, and plan for 11d 6h 58m of building. The hero level cap rises to 115.

Sanctuary Level 24 Requirements

Walls 23 return to the list, and you also need Research Lab 23 and Lumber Depot 10. The price is 171.2M Grain and Timber with 56.25M Herb, and the work lasts 15d 19h 21m. This upgrade brings the hero cap to 120 and the Sanctuary might to 137.3K.

Sanctuary Level 25 Requirements

Costs climb quickly after level 24: Grain and Timber go from 171.2M to 277.9M each, Herb from 56.25M to 97.53M, and build time from 15d 19h 21m to 22d 3h 5m. The building list is Research Lab 24, Training Grounds 24 and Herb Storage 10. The hero cap becomes 125.

Sanctuary Level 26 Requirements

Antitoxin Workshop 13 is back on the list, next to Research Lab 25 and Warrior Statue 25. The Sanctuary itself takes 30d 23h 32m, which is the first build above 30 days. It costs 386.8M Grain, 386.8M Timber and 123.5M Herb, and lifts the hero cap to 130.

Sanctuary Level 27 Requirements

Farm 13 is the production requirement here, joined by Research Lab 26 and Training Grounds 26. Resource needs reach 548M Grain, 548M Timber and 168.6M Herb, and the clock shows 43d 8h 57m. After the upgrade, the hero level cap is 135.

Sanctuary Level 28 Requirements

Barracks 27 appears next to Research Lab 27 and Lumberyard 13. The Sanctuary needs 60d 17h 20m, so this is the first upgrade longer than 60 days. Expect to spend 731.1M Grain, 731.1M Timber and 236.5M Herb. Your hero cap grows to 140.

Sanctuary Level 29 Requirements

The Grain and Timber bill is 1.05B each, the first one above a billion, with 316.4M Herb on top. Alliance Hall 28, Herb Garden 13 and Research Lab 28 must be ready, and the build lasts 78d 22h 32m. The hero level cap is 145 once it finishes.

Sanctuary Level 30 Requirements

The final upgrade asks for Research Lab 29, Training Grounds 29 and Antitoxin Workshop 15, the highest Antitoxin Workshop level on the whole path. It costs 1.36B Grain, 1.36B Timber and 441.3M Herb and takes 102d 14h 53m. At level 30 the hero cap is 150, with 50,500 HP, 723 ATK and 723 DEF.

Which Buildings to Upgrade First

The Sanctuary decides how far everything else can go, but the buildings it asks for still need to be ready on time. This video walks through the buildings worth upgrading early, which helps you plan the requirement list above before it blocks the next Sanctuary level.

What Each Level Gives

Each Sanctuary level raises the hero level cap and the base stats of your heroes. Heroes cannot go past the cap, however many resources you spend on them, so the Sanctuary decides how far hero leveling can go. From level 6 on, the cap rises by 5 with every upgrade. The heroes page covers the roster, and the might page shows how to raise your total might.

Sanctuary Upgrade Guide

The Sanctuary is the main building, and no other building can pass its level. That makes it the first thing to prepare for, and the list of required buildings tells you what to level next. The upgrade guide shows where the Sanctuary fits in the full progression.

1. Levels 4 to 6 need only storage and walls. Level 4 asks for Lumber Depot, Granary and Herb Storage at level 1, level 5 asks for Walls 3, and level 6 asks for Walls 5.
2. Levels 7 to 10 add Training Grounds, Alliance Hall and Infirmary, with Walls rising to 9. Alliance Hall requires you to be in an alliance, which the alliance page explains.
3. The Research Lab joins at level 11 with level 7. From level 12 to level 30 it stays exactly one level below the Sanctuary target, so level 24 needs Research Lab 23. Raise it right after each Sanctuary upgrade starts.
4. Levels 12 to 19 bring Warrior Statue, Barracks, Antitoxin Workshop and the production buildings. Farm, Lumberyard, Herb Garden and the three storages each need level 7 here.
5. From level 20, Training Grounds, Warrior Statue, Walls, Alliance Hall, Infirmary and Barracks take turns as the second requirement. Production buildings move to level 10 and later to 13, and the storages move to level 10. By then resources and time, not buildings, decide how fast you go.

Start saving Grain, Timber and Herb ahead of time, since every level costs more than the one before it. If you are still early in the game, the beginner guide covers what to build first.

Frequently Asked Questions

Read Next

• All Last Asylum buildings
• Upgrade guide and progression
• Heroes and hero leveling
• How to get Grain, Timber and Herb
• Research Lab and research priority
• Last Asylum gift codes