I haven't had time to do much, but here's what I have so far:

EXPANSIONS (all changed):
1F East Wing / West Wing: Purchase 7.5K, Upkeep 1,250
2F East Wing / West Wing: Purchase 15K, Upkeep 2.5K
2F Central War Room: Purchase 27K, Upkeep 4.5K
3F East Wing / West Wing: Purchase 27K, Upkeep 4.5K
4F East Wing / West Wing: CHECK
4F Landing: CHECK
5F East Wing / West Wing: CHECK

THEMES (so far, unchanged):
Blast Furnace Theme: 95K
Cooling Chamber Theme: 95K
Power Complex Theme: 95K
Wasteworks Theme: 95K
Spooky Theme: CHECK

ENVIRONMENTS (so far, unchanged):
Falling Embers Environment: 45K
Rain Shower Environment: 45K
Snowfall Environment: 45K

UPGRADES (so far, unchanged):
150 member limit: 150,000
200 member limit: CHECK
250 member limit: CHECK
300 member limit: CHECK
Guild storage: CHECK

ROOMS (so far, unchanged):
Empty Patchwork : 14.5K
Empty Checkerboard : 14.5K
Empty Inudstrial : 14.5K

EXPANSIONS (unknown):
Bechamel's Makeover Studio: CHECK
Auction House: CHECK
Alchemy Room: CHECK
Coliseum Room: CHECK
Hunter's Lodge: CHECK
Punch & Vise's Workshop: CHECK
Private Training Hall: CHECK
Tranquil Snipe Garden: CHECK

FEATURES (so far, unchanged):
Doors (all) : 50K

FURNITURE (changed):

EDIT: Changed format for readability, added some things I need others to check (I'm not upgrading or downgrading my guild hall that much).