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|
|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|
|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.|
|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.|