Much depends on personal opinion to what is an eyesore, something attractive can be an eyesore if put in a different or inappropriate place.
If you stand on the promenade at the bottom end of Nant-y-gamar Rd in Craig-y-Don you will see that in recent years a new house has been constructed on top of the hill on the right hand side. It looks to be in a fabulous position with far reaching views and wonderfully landscaped grounds.
Whilst in construction the people who built it cut down numerous trees without the appropriate permission. I think they were ordered to replace 270 of them by replanting, they might even have had a fine too. This would have been peanuts compared to the value gained by giving the house one of the best plots in the region.
What surprises me is that I'm pretty certain that they have continued to remove trees after the initial fine, take a look and see what you think.It's so in the open now they basically have waved a couple of fingers at the local authority.