Maxwell Place is a typical lowland Scottish freestone villa of the post-Adam period, built gradually between 1806 and 1824. Sir Walter Scott considered its style 'vulgar and modern'. If you're interested in Scott, literature and social history, take at look at Mythstuff.
This may look imposing, but in Scotland it isn't very unusual; most town houses in Kelso dating from this period have a similar style, and are built of the same stone. The cost of a house like this in the Scottish Borders is around 50% of typical English regional prices, and the area is popular for teleworking and relocation of small businesses which do not need to be geographically close to their customer base.