costly, dear, expensive, precious, premium, rich

extravagant, grandiose, ostentatious, pretentious, showy

august, awesome, awful, baronial, beautiful, gorgeous, grand, heroic (also heroical), imposing, impressive, kingly, magnificent, majestic, monumental, noble, proud, regal, royal, splendid, stately

comfortable, cozy, homelike, homey (also homy), snug