In a modern, "western" country, where can I set my secret facility so that authorities won't find me for about 30 years?

The needed amount of area is relatively large, a bit less than 200 m2. The facility in itself is not particularly needy; it requires running water/electricity but nothing else. On top of that, it does not produce noise or waste, etc., so it should be possible for it to maintain quite a low profile.

The real issue is that this HQ (with its machinery and all) is that it is hard to move. If authorities announce that they want to survey the area, I will have a hard time hiding everything, even knowing it 10 days in advance, so it would be better for this place to be outside of the authorities’ reach. 

So basically I need a place where I can get electricity and running water that local authorities will likely not reach for about 30 years. Does such a place exist?

If it’s a private property, can I realistically keep all people out for such a long time? Even for things like mainteinance and upgrades of meter etc. 
Many modern cities have been built on top of older cities and have very complex sewer systems and catacombs; how "safe" are those spaces? What about abandoned places and buildings?