Does unslightly mean it is a lot? 

"...The rules would apply as long as the house is not in a conservation area.

Building regulations will still have to be followed so that certain standards are met but the fear is relaxing the planning rules will cause a free-for-all with unslightly extensions springing up in back gardens across the country.

It is one of the concerns Ruth Reed, from the Royal Institute of British Architects, will be raising during the consultation...."

Read the whole article at:

http://news.sky.com/story/985627/should-house-extension-rules-be-relaxed