Till now there is no building limits iplemented, you can place as many pieces you want on official server (the private ones have their own rules check with your adim). By the way you cannot bloco resource or thrall spawns, block acess to contents, or passages, or abuse of elements that could degrade server or client performance, like puting gigazillions of torchs or some kind of it. Doing those things can lead to get your building wiped and you account suspend on the official servers, from 7 days to permanent according with the severity of the infraction. Also claming too much land and not using it, or using just for decorations are also bannable. Also take a loo into to know what not to do: