建築

維多利亞2中的建築有三種類型。海軍基地和要塞只能由政府建造，而一個國家的經濟政策決定了資本家還是政府可以建造鐵路。

建築物是在各個省份建造的（不像工廠是在地區一級建造的）。對於要塞和鐵路來說，一個國家可以擁有多少建築的唯一限制就是省份的數量。同樣，遊戲中的一個省份可以同時擁有所有可用的建築。不過每個地區只能有一個海軍基地。

堡壘

Forts are defensive structures that provide a variety of benefits.

Default cost per level(this is increased if the national administrative efficiency is less than 100%):

100 lumber
100 cement
50 explosives
50 small arms
40 artillery

Benefits:

Each level of a fort increases the time to occupy a province by roughly 75%. This means a Level 3 fort increases the occupation time by 225% and so forth.
Forts provide a bonus to the defender's military tactics in battle, though only to the owner. The bonus for a Level 1 fort is 10%, shown in comparison to 100% tactics/level. The bonus can be observed by hovering the mouse over the flags in the combat window, along with the number of techs and tactics bonus.
Armies in enemy territory adjacent to an enemy fort show +2% attrition modifier for presence of nearby fort.
Level 1 fort increases colonial range by 100.

海軍基地

Naval bases are buildings that allow country to build a bigger navy and colonize land. They can only be build in coastal provinces, and there can only be 1 base per state. (except in vanilla and AHD, where all provinces can hold a naval base)

Default cost per level(this is increased if the national administrative efficiency is less than 100%):

50 timber
50 lumber
100 cement
100 steel
1 machine parts

In addition to the goods, naval bases also have an added 15 000£ price tag after level 1. This cost doubles with each level of naval base. So the total price will be:

level 1 naval base: cost of the goods
level 2 naval base: cost of the goods + 15 000£
level 3 naval base: cost of the goods + 30 000£
level 4 naval base: cost of the goods + 60 000£
level 5 naval base: cost of the goods + 120 000£
level 6 naval base: cost of the goods + 240 000£

Benefits:

Increases naval supply throughput by +10 per level, which limits the size of navy that can be effectively supplied
Gives 30 colonial points for level 1 naval base(and +20 points for every level after that)
Increases colonial range +50 per level
Makes local ship build time 10% shorter per level
Higher levels are needed to build more advanced ships (note that capital ships also can't be built overseas):
- Level 1 required for Man'o'War, Commerce Raider and Steamer Transport
- Level 3 required for Ironclad and Monitor
- Level 4 required for Battleship and Cruiser
- Level 5 required for Dreadnought