From Hearts of Iron 3 Wiki
|Building Name||IC||Time (Days)||Max. Level||Knowledge Type||Knowledge Increase||Effect|
|Air Base||2||180||10||Construction||0.13||+1 air capacity|
|Naval Base||5||180||10||Construction||0.33||+1 naval capacity|
|Underground||4||180||1||Militia||0.1||+ 1 local underground|
|Coastal Fort||5||180||10||Construction||0.33||-9% to shore attackers|
|Land Fort||5||180||10||Construction||0.33||-9% to land attackers|
|Anti-Air||3||60||10||Artillery||0.25||Fires at enemy aircraft (equal to 1 Air Attack?)|
|Infrastructure||0.5||180||10||Construction||0.13||Faster movement and more supply throughput|
|Radar Station||2||180||10||Electronic Eng.||0.5||Detects enemies, bonus to air combat|
|Nuclear Reactor||50||180||10||Nuclear Bomb||6.0||Required for Nuclear Bomb research|
|Rocket Test Site||20||180||10||Rocket||6.0||Required for Rocket Engine research|
- Forts and Infrastructure must be constructed directly in the provinces where they are to be located. This means that the level of these buildings in a province must be built up sequentially.
- Air and Naval bases can be built outside of provinces; however, they can only be deployed into provinces with zero level of that kind of base. Further levels must be built sequentially.
- Underground resistance (UR) can be built by Governments in Exile or Majors, and placed in allied countries. UR will spawn as militia or as partisans in an adjacent province.
- Other buildings can be built outside of provinces and deployed anywhere. For example, you can build 10 levels of Radar Station in parallel and deploy them all to the same province. Note that if you deploy many levels in the same province at the same time it may take up to a few months for them all to come online.