Andrew Stunnul the communities minister has been pro active concerning the Seventeen Windows saga, Informing us of a wde ranging enquiry and the case being passed to the Ombudsman.
I don't think this case could be considered by the Local Government Ombudsman, because the Ombudsman only deals with allegations of alleged personal injustice, where the claimaint is seeking a remedy or compensation on their own behalf. Examples might be in education (e.g. child given a place in a school miles away, when there is one next door), or social care (e.g. granny not receiving enough financial support for her care home). Unless, sooty, you are wanting Stockport Council to award you financial compensation for the pain suffered every time you pass Seventeen Windows.
General complaints about local authorities are dealt with by Standards for England - the organisation Stunnell is planning to abolish!