# New basement construction research

> New basement construction: Required Materials. Timber, Iron Ore

Canonical: https://lostark.wiki/database/stronghold-research/new-basement-construction-100207?relation=research_materials

Expand the storage by digging a new basement. In addition to Petrania's Demon Legion,  
you must now battle the Rat Legion in the basement.

## Facts

- **Category**: Roster Storage Expansion
- **Time Taken**: 0d 16:00:00
- **Required Action Energy**: 4,608
- **Research Cost**: 50 Gold
- **Stronghold XP gained**: 9,216
- **Research Requirements**: Lab Lv. 3; Stronghold Lv. 20 or above; [Manor Lv. 3](https://lostark.wiki/database/stronghold-research/manor-lv-3-101003); [Changing the storage's structure](https://lostark.wiki/database/stronghold-research/changing-the-storage-s-structure-100206)

## Related

- [Required by research](https://lostark.wiki/database/stronghold-research/new-basement-construction-100207#relationships) (1)
- [Research Requirements](https://lostark.wiki/database/stronghold-research/new-basement-construction-100207?relation=research_requires#relationships) (2)
- [Required Materials](https://lostark.wiki/database/stronghold-research/new-basement-construction-100207?relation=research_materials#relationships) (2)

### Required Materials

1–2 of 2

| Name | Quantity | Details |
| --- | --- | --- |
| [Timber](https://lostark.wiki/database/items/timber-6882301) | 60 | Quantity 60 |
| [Iron Ore](https://lostark.wiki/database/items/iron-ore-6882401) | 20 | Quantity 20 |

## Related

- [Home](https://lostark.wiki/)
- [Stronghold Research](https://lostark.wiki/database/stronghold-research)