Multi-story housing

Multi-story house

Multi-story structures can only be built on flat tiles.

Skill needed

The more floors your house has, the more skill is needed; see the table below for the required skill levels. Only the first (ground) floor planning needs 1 carpentry skill per wall and 1 skill per tile. With 20 skill a roof may be placed over the first floor, but not an opening or floor above. For upper floors, the roof counts as a floor (although it may have less of a skill requirement than an opening or floor above - unconfirmed).

update stone wall require masonry to make upper floor.
You may have a total of 16 floors (counting ground level as the first floor)

Floors	Carpentry
2	21
3	30
4	39
5	47
6	55

Floors	Carpentry
7	63
8	70
9	77
10	83
11	88

Floors	Carpentry
12	92
13	95
14	97
15	98
16	99

Adding a roof

Plan and completely build the walls.
Use a mallet to plan the ground floor.
Use mallet on tile below and plan floor below.
Then plan roof above.
Use mallet on tile below and plan roof above.
Build them.

How to make another floor

Plan and completely build the ground floor walls.
Then use a mallet to plan the ground floor.
Use mallet on tile below and plan floor below
Then plan floor/roof above.
Use mallet on tile below and plan floor above
Plan a tile with an opening above to make a ladder climbing spot to climb up to upper floors.
Build them.
Use ladder to get up to upper floor.
For next floors build walls where needed and then plan roof/floor above.

Notes

In-game descriptions describe the bottom floor as being the 1st, which is a US standard. Therefore the Wurmpedia will describe this as such. The use of the term ground floor or ground will be kept to a minimum.
There must be at least one planned wall below a tile to plan an floor above.
You can not build floors above fences, walls or parapets.
You can drag carts up ladders to get them to an upper floor.
You can fall and take damage from upper floors if there is no wall/fence of roof to stop you. (Please be careful as people have died in 1 fall from 4th floor drops)
Ladders will always be on the south side of the opening.
The 1st floor must be complete before walls on the 2nd can be planned. This is not true, however, of any additional floors.
Where a mallet is mentioned a hammer can be used in its place.
When you destroy a structure all items on upper levels will fall to the ground.

Floor and Opening types

Housing floor types.

Floors	Openings
Wooden plank floor	Wooden plank opening
Pottery brick floor	Pottery brick opening
Stone slab floor	Stone slab opening
Marble slab floor	Marble slab opening
Stone brick floor	Stone brick opening
Slate slab floor	Slate slab opening