We'd need to have a lot of money, a disregard for return of investment and a lot patience: Current RTGs can do that, but they're rather expensive for heating houses and problematic from the nuclear materials POV (waste / profileration), not to mention the regulatory and licensing for using it a neighbourhood - better budget the time and money for lobbying for some legislation changes.
If by building we mean say 10 apartments, and each needs 10 kW, the RTG would need hundreds of kg of Pu-238 plutonim dioxide [1].
It's hard to cite the exact cost for that since it's not a freely traded commodity but that's a lot of plutonium. Eg NASA said that with a $75-90 million investment they can make 1.5-2 kg per year of it. [2]
We'd need to have a lot of money, a disregard for return of investment and a lot patience: Current RTGs can do that, but they're rather expensive for heating houses and problematic from the nuclear materials POV (waste / profileration), not to mention the regulatory and licensing for using it a neighbourhood - better budget the time and money for lobbying for some legislation changes.
If by building we mean say 10 apartments, and each needs 10 kW, the RTG would need hundreds of kg of Pu-238 plutonim dioxide [1].
It's hard to cite the exact cost for that since it's not a freely traded commodity but that's a lot of plutonium. Eg NASA said that with a $75-90 million investment they can make 1.5-2 kg per year of it. [2]
[1] https://drinksavvyinc.com/blog/how-much-does-a-radioisotope-... gives 2 kW per 5 kg [2] https://www.space.com/20774-plutonium-spacecraft-fuel-nasa-b...