Building costs

These are the basic costs of all province improvements you can build.

Arsenal of Democracy essentially maintains the same costs as HOI2. Some buildings require more manpower and have tweaked IC costs reflected by shortened buildtimes. adds buildings that control the conversion of energy to oil and oil to rare materials, whose sliders are on the Production tab. With enough nuclear research countries can also begin to build nuclear power plants, which generate energy.

Unlike in HOI2, buildings - other than IC and the 3 Plants - can benefit from gearing bonuses.

	Game Reference	IC Cost	Build Time (Days)	Manpower	Size	Notes
Air Base	air_base	2	90	0.0	1
Anti-Air	anti_air	3	60	0.5	1	Causes strength and organization damage to aircraft overhead.
Coastal Fortification	coastalfort	4	1000	0.0	1	Can only be built in coastal provinces that can be invaded.
Industrial Capacity	ic	5	360	1.0	1	Does not benefit from gearing bonuses.
Infrastructure	Infra	2	120	0.1	0.05	Builds in increments of 5% for a maximum of 200%.
Land Fortification	landfort	5	1200	0.0	1	With tech level 1938 the build time is reduced by 90% to 120 days
Naval Base	naval_base	5	180	0.0	1
Nuclear Power Plant	nuclear_power	5	240	2.0	1	Base energy creation of 1.5 units.
Nuclear Reactor	nuclear_reactor	50	180	5.0	1	Speeds Nuclear Physics and Nuclear Engineering research.
Radar Station	radar_station	2	180	0.5	1
Rocket Test Site	rocket_test	20	180	1.0	1	Speeds Rocketry research.
Synthetic Oil Plant	synthetic_oil	3	180	1.0	1	Converts energy into oil.
Synthetic Rare Materials Plant	synthetic_rares	3	180	1.0	1	Converts oil into rare materials.