A house with a listed car port, that would be something new... (-:
As has been noted a car port can off-set the usual condensation issues which rot cars from the inside out, and perhaps more so in my climate. I guess a car coon inside a garage may work well or an air conditioned garage in terms of preservation.
That garages are handy for so much of the "stuff" we all collect, it seems that a garage is a must wherever possible, I guess applying for planning for something that looks like an oak framed garage might be more acceptable than a possible threat to build a series of small sheds that are of dimensions not to require planning permission, and supposedly required to store all your stuff, which might ease acceptance to a garage build.. Something along those lines worked for me some years back.
Good luck.
