It's fairly typical for homes in Virginia from that period. Stylistically, it's a two-story central hall plan vernacular farmhouse. It's not one of the fancy named styles, but then again, most older houses are vernacular, that is, not slavish renditions of a formal style.

There have been some changes over time with your house; I am guessing the chamfered porch posts date from somewhat later. I can't see much more from the photo, but the central passage plan is common to that era and area. Sometimes it is erroneously called an "I House," but central hall is correct.

It's a very attractive home and we'd love to see more photos, including any interior details.

Nice old farmhouse, what the Victorians would have described as "honest", having no pretentions to what it wasn't. The farmer built himself a good solid house of stone, then added onto the back when he needed room.
I have a feeling the porch was added after the house was built. From the picture it seems to be more of a patio with a porch roof, no steps up to it. They may have added the porch on early on, though, especially if it faced west. Victorian era farmers often added porches to the western facades of their houses so they could catch the last rays of the sun for afternoon or evening chores, or just sit and relax at the end of a hard day.

Thank you so much for your comments! I truly appreciate them. Spewey, you can see more photos if you follow the link and click through the album photos. There are interior shots there (with decor of the previous owner). I don't know any other way to post photos, otherwise I would!

Kennebunker...the porch is on the house's southern exposure.

Thanks again, both of you.