Most of those building models suggested strike me as either too obviously from the Mid-Atlantic South -- e.g. Grand manor's "Guilford Courthouse" & Mini-Building Authority's "Shenandoah House" -- or, are more likely than not derived from architecture of late 18th Cent. or early 19th Cent. in the South. Their "Tavern" is to my eye based very much upon the front facade of the "Raleigh Tavern" at Colonial Williamsburg!!
Of course, that kind of marketing makes perfect sense from a manufacturer's point of view -- "bang for the buck" -- i.e., making such buildings that will support sales in both the AmRev AND the ACW using the same model. Structures appropriate to grace AmRev game-table battlefields, if not too obviously of an architectural style that post-dated 1763, would of course ALSO be plausible in the various F&IWs of the early 1700s (up to THE F&IW of 1754-63), but
But there were actually architectural stylistic differences between Colonial Virginia and the Carolinas, and Colonial New England. "Southern Colonial" was characterized by houses built on the "hall & parlor" and "central-passage" plans. These house-types, several good examples of which can be found at Colonial Williamsburg, permitted opening the homes up in summer months to get air-flow through the building for cooling. They usually had their fireplaces with their related chimneys placed on the gable-ends of the house.
In addition, Mini-Building Authority's "Granny's Cabin" would not be built up off the ground like that if built in New England, with its cold winters. You wouldn't keep it heated with the Canadian/Arctic air whistling under the floor boards!! However, it would be alright for your games when fighting Greene's campaign in the South.
The "Saltbox" house evolved in New England from ca. 1650 -- most likely as a quick and cheap way to add more space for expanding families by adding a lean-to at the rear of the house. The two-story slab-front and the central chimney block were traditional, like with Daniel Comstock's Homestead built c. 1739 out in the Litchfield Hills of Connecticut.
When the characteristic low-ceilinged "lean-to" was added to the north side of a south-facing house, it had the added advantage of presenting a short wall with few windows towards those "cool breezes" coming down from Canada in winter, while the two-story front of the house with more windows had a warmer southern exposure. To further insulate the home, the kitchen was often moved into the lean-to addition, and an attic placed in the new crawl-space over the addition (to make a sort of air-buffer and add storage). One quirk of such houses was the the clap-boards of the former exterior at the back of the house were often left in place (as added insulation?). The style remained popular in New England into at least the 1890s.
You asked about Lexington & Concord? The Grand Manner "Hartwell Tavern" main building is a New England Saltbox, built ca. the 1730s and located in Lincoln, MA, about halfway between Lexington Green & North Bridge. The view I am seeing on GM's website of their model of the main building is actually the back of the house, not the front. The newer addition (the second building of their set) was added sometime ca. the 1750s, and is a "Dutch" Gambrel. As a stand-alone it would sit okay IMO in a game set in "Dutch" country --- in the Hudson Valley --- but obviously "Yankees" were not above building in other styles in Massachusetts by the mid-1700s.
Then again, as the Reverend Rosenkrantz said in his sermon in Drums Along the Mohawk: "Oh, Almighty God, hear us, we beseech Thee, and bring succor and guidance to those we are about to bring to Your divine notice. First we are thinking of Mary Walaber. She is only 16 years old, but she is keeping company with a soldier from Fort Dayton. He's a Massachusetts man Lord, and Thou knowest no good can come of that!!"
There is Renedra's "North American Cabin or Farmhouse, 1750-1900," and although it is "loosely based on Meade's headquarters during the battle of Gettysburg in 1863," you could compare it to the "John Neilson Farmhouse" on the Saratoga Battlefield (1777). If you cut the wide end off and did some kit-bashing to the far wall, leaving only a smaller house and its porch, you'd have a pretty fair approximation of that small one-room Up-state New York farmhouse
Renedra's also just coming out with a No. American church which if painted a stark, clean, white would not be out of place in New England