If you use a keyword rich url and the title is miles away from the url, then you are bordering on spam, and risk a penalty.
keyword rich urls are meant to be relevant. If the page is about stripping wallpaper then that is what the title of the page etc should be.
If you want to use a KW rich url, then you need the content to match.
Personally I would add a blog to the site, and do it that way.
One thing though when we refer to 'structure' we mean generally the levels of a site, rather than urls on a single level. You could achieve what you are doing by having a folder called painters-and-decoration-Manchester so it sits like so yourdomain.com/painters-and-decoration-manchester/yourpageshere then your url for that article would be
yourdomain.com/painters-and-decoration-manchester//How-to-give-your-home-a-contemporary-look.htm
that would be better, although it is getting clumsy
Do yourself a favour and get some backlinks with the right anchor text
