Building a breakfast nook

Owners stuck on floor, ceiling, vent options

Q: We are adding on a breakfast nook (120 square feet of living space) with a single exterior French door, a 3-by-6-foot window on the opposite side, and a 7-by-5-foot-wide bay window on the exterior wall. It will have a cased entryway off of our current dining area. We need guidance for flooring and ceiling choices.

1. Floor — our current kitchen has 19-year-old vinyl and will flow into the new addition. We would like to go as green as we can afford. Options: both areas with linoleum; linoleum to replace just the vinyl, with hardwood or laminate in the new addition; or carpet?