Homebrew: Property, Walls

Sometimes, builders construct walls after the structure is already in place, whether to guard against unwanted visitors or simply to add privacy. The wall sections are assumed to be 10 feet tall and 20 feet wide each. For towers, you can place a guard post above the walls and add a siege equipment, such as a ballista or a trebuchet. The cost for walls will depend on the material you use, and each material have its own statistics regarding hit points, AC and damage threshold, as shown in the table below. When a wall section reaches 0 hit points, it is destroyed. You can read more about materials and damage threshold in the Chapter 8 of the Dungeon Master’s Guide. To calculate the amount of gold pieces it will cost to enclosure the whole structure, multiply the structure size in Building Spaces by the material cost per section, considering only the building spaces that are in the same level as the wall. For example, a group wants to build a wall around their mansion. The structure have 8 building spaces in the first floor and 4 building spaces in the second floor. In this case, the characters decide to build a stone wall, so they need to spend a total of 4,800 gold pieces to enclosure the structure. This page details stronghold and dungeon walls. Information includes thickness, hit points, damage threshhold and costs to build. Structural Walls vs. Freestanding Walls:

Structural walls are those that make up building, and can have different material on both the interior and exterior side.
Freestanding walls are strong, protective walls that usually surround large cities, castles and courtyards.

Damage Threshhold: Certain wall materials have a Damage Threshhold. A wall with a Damage Threshold has immunity to all damage unless it takes an amount of damage from a single Attack or Effect equal to or greater than its Damage Threshold, in which case it takes damage as normal. For example: if a wall has a damage threshhold of 20, and is attacked for 17 damage, no damage is taken (since 17 is less than 20). However, if the same wall is attacked with 24 damage, it takes 24 damage (since 24 is greater than 20). Augmenting Walls: Once a wall is built, it is possible to augment the walls. You can add razor wire, make the walls slippery or even add magical properties. For a list of augmentations, click here.

Structural Walls

Structural walls are those that make up a building, such as a cottage or mansion. When above ground, structural walls can use different materials on the interior an exterior side of the wall, but many use the same material on both. Structural walls are different from freestanding walls, which are walls that surround areas (like the walls surrounding a city, castle, or courtward). For more information on freestanding walls, click here.

Material	AC	HP*	HP/in.	Thickness*	Damage Threshold	Cost per 5'*	Climb DC	Notes
Adamantine	23	300	100/in.	3 in.	40	500 gp	25	—
Bone	15	120	10/in.	1 ft.	5	50 gp	10	May be difficult to acquire in Good kingdoms
Crystal	13	12	4/in.	3 in.	0	Special	26	—
Earth, Packed	10	36	1/in.	3 ft.	0	2 gp	10	—
Glass	13	10	3/in.	3 in.	0	75 gp	25	Can be clear, or opaque.
Ice	13	120	10/in.	1 ft.	0	50 gp	25	Half price in colder climates.
Iron	19	150	50/in.	3 in.	20	200 gp	20	—
Masonry	15	180	15/in.	1 ft.	10	25 gp	15	—
Masonry, Reinforced	19	288	24/in.	1 ft.	15	75 gp	15	—
Masonry, Superior	17	240	20/in.	1 ft.	12	50 gp	20	—
Mithral	21	225	75/in.	3 in.	30	350 gp	25	—
Steel	19	180	60/in.	3 in.	25	250 gp	20	—
Stone, Hewn	17	1080	30/in.	3 ft.	20	100 gp	15	—
Stone, Unworked	17	2000	33/in.	5 ft.	20	50 gp	12	—
Wood	15	60	10/in.	6 in.	5	10 gp	20	No cost for ground floor. -10% costs in forest terrain.
Wood, Living	15	72	12/in.	6 in.	0	100 gp	15	Must be created using magic (wizard may cost extra).

* Freestanding walls, like those that surround castles and keeps, are thicker, have more hit points and cost more. See the freestanding wall table below. There is a great Calculate Structure Wall Costs Calculator on the TG.cc site.

Freestanding Walls

Freestanding walls are thick, protective walls that tend to surround cities, castles and courtyards. They are different from structural walls that make up buildings because they are thicker, stronger, cost more and can be built extremely high (For more information on structural walls, click here). Freestanding walls that are higher than 10 feet must add an extra layer of thickness to each lower layer in the stack. This addition is cumulative; For example, a 10ft tall wall will have a single panel (see thickness in the table below). A 20ft tall wall would have 2 thick panels, topped by a single panel. A 30ft tall wall would have 3 panels, topped by 2 panels, topped by a single panel. Etc.

Wall Material	Thickness*	HP*	HP/in.	Damage Threshold	Climb DC	Cost per 5'*	Notes
Adamantine	6 in.	600	100/in.	40	25	1,000 gp	—
Bone	2 ft.	240	10/in.	5	10	100 gp	May be difficult to acquire in Good kingdoms
Crystal	6 in.	24	4/in.	0	26	special	—
Earth, Packed	6 ft.	60	1/in.	0	10	5 gp	—
Glass	6 in.	25	3/in.	0	25	150 gp	Can be clear, or opaque.
Ice	2 ft.	240	10/in.	0	25	100 gp	Half price in colder climates.
Iron	6 in.	300	50/in.	20	20	400 gp	—
Masonry	2 ft.	360	15/in.	10	15	50 gp	—
Masonry, Reinforced	2 ft.	576	24/in.	15	15	150 gp	—
Masonry, Superior	2 ft.	480	20/in.	12	20	100 gp	—
Mithral	6 in.	450	75/in.	30	25	700 gp	—
Steel	360	60/in.	25	20	500 gp	—
Stone, Hewn	6 ft.	2160	30/in.	20	15	200 gp	—
Stone, Unworked	2376	33/in.	20	12	100 gp	—
Wood	1 ft.	120	10/in.	5	20	20 gp	No cost for ground floor. -10% costs in forest terrain.
Wood, Living	2 ft.	288	12/in.	0	15	200 gp	Must be created using magic (wizard may cost extra).

There is a great Calculate Freestanding Wall Costs Calculator on the TG.cc site.

Wall Augmentation

Once a wall is built, the walls may be augmented for an additional cost. The costs below are for each 5-foot wide by 10-foot tall wall section that is augmented. The augmentation effect also applies to any doors, windows, or other accessways through that wall. You can choose not to augement such entryways, though their area still counts toward the augmentation's area of effect (i.e. a non-augmented doorway next to a wall with a poisonous fog veil will have a poisonous fog in its path). Some magical augmentation is extremely powerful — so powerful that a DM may decide that the base costs are not enough. In such a situation, the DM may decide that a quest is required before the augmentation can be applied. For example, before a wizard can begin to add a fog veil to a stronghold wall, they may need the party to retrieve an eversmoking bottle. Or, if the party wants a fiery wall, they may need to retrieve some rare spell components from the elemental plane of fire.

Augmentation	Cost per 5'	Notes
Airtight	30 gp	Prevents gases from passing through (but not over or around).
Ethereal Ward	100 gp	Protects against ethereal intrusion.
Fiery	3,000 gp	The wall is continually ablaze with magical fire.
Fireproof	25 gp	The wall is impervious to fire.
Fog Veil	1,000 gp	Conceals the wall with a veil of fog.
Fog Veil, Incendiary	2,500 gp	Conceals the wall with a veil of hot gray fog that causes fire damage.
Fog Veil, Poisonous	2,000 gp	Conceals the wall with a poisonous veil of green fog.
Fog Veil, Solid	1,000 gp	Conceals the wall with a thick veil of fog that is difficult to move through.
Fog Veil, Stinking	2,000 gp	Conceals the wall with a stinking veil of yellow fog.
Frostwall	400 gp	A cold wall that causes frost damages to anyone passing through a broken portion.
Greased (Slippery)	5 gp	This wall is slippery and difficult to climb.
Magic Warding	500 gp	The wall has resistance to any damage caused by magic.
Magically Treated	50 gp	The wall is granted a stronger damage threshold, making it harder to destroy.
Protection from Evil	800 gp	This wall will provide warding against evil creatures, forcing them to make a Wisdom check or be turned.
Spiderclimb	50 gp	This wall is extremely easy to climb.
Spiked Surface	30 gp	The wall has sharp, jagged shards covering the face of the wall, making climbing dangerous.
Spiked Top	5 gp	The wall is topped with sharp, jagged shards.
Tanglewood	90 gp	This wood augmentation entangles invaders.
Thornwood	30 gp	This wood augmentation causes damage to anyone that comes in contact with it's sharp thorns.
Topped with Razor Wire	10 gp	The top of the wall is covered in a tangle of barbed wires.
Transparent	75 gp	A transparent wall allows creatures to see through the wall to the other side.
Webbed	40 gp	The walls are covered in a mass of thick, sticky webbing.