bk, thanks for that long summary of the features. very much helped in visualizing the layout and space.
it reminds me of lucera, madison lane, and wyndover in bonita canyon. obviously those are on a much larger scale and not alley-loaded. but if a builder can pull off a smaller version of those, i would be a happy camper. i agree with zov and wonder whether the yard would feel claustrophbic if completely enclosed by 2 stories on 3 sides. you may not want to allow buyers to over-featurize, i.e. opt for the granny flat AND enclosed mud room AND second floor covered hallway above mudroom.
http://www.redfin.com/CA/Newport-Beach/12-Anondale-92660/home/4725940
<img src="http://i-0.rfimg.us/photo/46/bigphoto/141/U8003141_2.jpg" alt="" />
<img src="http://i-0.rfimg.us/photo/46/bigphoto/141/U8003141_13_1.jpg" alt="" />
<img src="http://i-0.rfimg.us/photo/46/bigphoto/141/U8003141_14_1.jpg" alt="" />
<img src="http://i-0.rfimg.us/photo/46/bigphoto/141/U8003141_12_1.jpg" alt="" />
another bonita canyon home...
<img src="http://socalmls.idxnetwork.com/photos1/49/U8005149_1.jpg" alt="" />
i love the idea of the mudroom space as an outdoor patio, or possibly have a covered patio on the backside of the actual house if the mudroom is completely enclosed. that would help open up the yard, although the latter option would eat into actual living space inside the house.
<img src="http://homeseekers.cyberhomes.com/ListingImages/flist/addl_picts/03lhU8002117-13.jpg" alt="" />
below: imagine this is the yard taken with the garage directly behind you. the wall on the left with the staircase would represent the mudroom. either have a covered patio as part of the main house and an enclosed mudroom leading from the garage to the hosue (as in the picture), or swap the covered patio to where the mudroom/wall is and have a nice set of french doors from your house that opens into the yard. both would be lovely imo.
<img src="http://homeseekers.cyberhomes.com/ListingImages/flist/addl_picts/03lhU8002117-16.jpg" alt="" />