It's not a style you can put a finger on...
It does appear to me to have been "influenced" by several movements.
The steel sash "factory casements" ganged together came out of the "international style" of the 20's it crept over here slowly and incompletely for the most part, but windows (and a few other details, or the conscious lack of detail) like these became acceptable in residential buildings.
The fenestration and proportions of the facade are reminiscent of Federal period buildings, and the elliptical fanlight (and perhaps the central entry and stair hall) are of the turn of the 18th-19th centuries.
The large overhanging eaves are much more iconic of the very movements flourishing when the house was built, that of Arts & Crafts, and it's highbrow relative, Prairie Style.
The nature of the beautifully-executed stonework is simply traditional to the mason, would be denoted as faced, random fieldstone with rustic quoin corners.
Casey