Under the decorators resource guide post theres this link hope it helps https://forums.daybreakgames.com/eq2/index.php?threads/breakout-locations.580417/
There's been folks who've managed to place stuff beyond the clear windows in Kelethin, Gorowyn, and New Halas (even I have, sort of, in Gorowyn) in less than 6- or 7-room places, but it's really difficult. Ostensibly, you can even make extra rooms by placing a teleport pad, for instance, higher than the ceiling in a smaller New Halas home, but anything that isn't at least sorta kinda "officially sanctioned" is At Your Own Risk. :-/ Heck, even the breakouts are, but for the most part, aren't too hazardous; "South Qeynos" and "Kelethin" can drop you off the edge of the world (you can tell when you're getting close in "Qeynos" because the street ends and you're looking DOWN on the moons and stars... ;->), but at least there, you'll get booted right back to a safe location. In Maj'Dul (and apparently, a "soft spot" in the world in the Mara Village prestige house), your toon will DIE. Why, I can't say, other than maybe a really sadistic dev. :-/ Good luck! Uwk