My ideal chapter house? This is coming from a former Corp President and an alumna, so here goes:
One which is centrally located to the other sororities on campus with
ample parking, in good repair inside and out, attractive and appropriate decor, guest mini-suite (use for official visitors, sisters spending the night, resident "sick room" or temporary storage when not in other use), and an updated House Director apartment to allow her plenty of space to work and live with some privacy. Formal and informal living space, a formal dining room which could also work as a multi-purpose room, house kitchen with a separate resident pantry and kitchenette (for when the house kitchen is closed). Since I'm coming from a sorority mindset, add in a breathtaking staircase from the 2nd level into the entry hall.
High-speed internet throughout.
As for the residential areas, my ideal would be to have competitive residential facilities (meaning style and number of resident bedrooms, bathrooms, showers, etc.) as well as state of the art computer and study rooms. It would be nice to have a small all-purpose room with a large closet (for luggage, winter coats, etc) on each resident floor as well. For the chapter: a large all-purpose meeting space, a smaller officer's work space, a dedicated "arts and crafts" room where posters, banners, recruitment props, etc. are to be made without members having to worry about paint spills or creative accidents in other parts of the house, member mailboxes, an informal room, a dedicated rec or workout room, and finally
more storage space!