In the 1860s Gibbs had the house significantly expanded and remodelled; a chapel was added in the 1870s Rebuilding work did not begin in earnest until 1863, wh

In the 1860s Gibbs had the house significantly expanded and remodelled; a chapel was added in the 1870s Rebuilding work did not begin in earnest until 1863, when William Gibbs had the property substantially remodelled in a Gothic Revival style. [...] Norton's design enveloped the original house. He added an extra floor, two new wings and towers. [...] As a result, while some walls remained plain, others were adorned with Gothic and naturalistic carvings to fit in with the previous architectural styles In a ~200 year old building you can expect such redevelopment to bring it more up to date with "current" architecture trends. But they tend to add up over centuries and you end up with a mix that might as well be unsightly but documents its history. Things are allowed to look less... fresh as they get old. When you start up and build as a mix it's just unsightly for no good reason. Other than a complete lack of taste (by many standards).