This is a tricky one! Would you be willing to shift the garage toward the front of the house? If so, here's a very rough idea of what could result:

Apologies for the sketchy graphic, but hopefully this gives you an idea what I'm thinking. I don't like the long hallway into the M. Bedrm. but there's probably a way to improve that. This plan maintains the door from the mud/laundry room into the master closet.

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Maybe think about extending to the back (making the house an L-shape) if you have enough lot size. I’m assuming the “porch” is in the front. The pink bedroom could be shortened to allow a hallway back to the master and master bath. The look of the house from the front wouldn’t change. The green room could become the child’s bedroom and the pink one the office. If the porch is in fact the back, my idea may still be workable, but making the green room narrower would result in a more awkward dimension if your scale is correct. It would still work for an office, though. It looks like your garage is only a one-car. If that’s the case, and depending on whether or not you can build a detached garage or increase the existing garage to a 2-car in the future, you might want to consider whether it would make more sense to invest money in the expansion you’re considering, or buy a larger house with a 2-car garage in a few years. More on reddit.com

I'm not sure what you're asking. I see no relationship between the proposed plan and the raised ranch that is existing. Please give us more information concerning your intentions so that we can offer useful advice.

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I’m assuming here that you have a lot of flexibility to reconfigure walls. If not, please excuse. It’s hard to figure out the scale of your floor plan, I used my best guess. More on reddit.com