cluttered
untidy, not organized, and covered with a lot of things
messy
dirty, untidy, or disordered condition
impressive
evoking admiration through size, quality, or skill; grand, imposing, or awesome
shabby
in poor condition through long use or lack of care
cramped
limited in the freedom to move because there is not enough space (possibly by too many things inside)
cosy
comfortable and pleasant, especially (of a building) because of being small and warm; nice
bare
without much furniture
sparsely decorated
not much furniture in the house
open-plan
an apartment without many walls
soundproof
preventing, or constructed of material that prevents, the passage of sound
airy
spacious
bright
sunny
quaint
attractive because of being unusual and esp. old-fashioned
ultra-modern
opposite to old-fashioned
