Helig, Llys Helig Drive has changed quite a bit over the last 10 years or so and old houses have been pulled down and replaced with ultra modern properties.
Money talks nowadays and properties are being built that don't fit in with the surroundings, take Anwyl's last plan for Penmorfa for instance
There is a restriction on land near the site of the old Bishop's Palace but I don't know if this building has or has not broken that restriction