Nature of Urban Conflict in this period
I know it was rare but where could i find good accounts of it to get the sense of how commanders faced such events, what was thier approach how did they execute an attack on a urban area etc.

Urban fighting stories...
Unfortunately in German but chapter 12 'Die Erstürmung von Halberstadt.' in Louis Ferdinand Spehr's 1848 volume 'Friedrich Wilhelm Herzog von Braunschweig' may be helpful. Probably quite a few similar accounts in French, German or Spanish volumes online in Google books and similar collections.

War to the Death by Raymond Rudorff One of the few examples of actual urban combat in the Napoleonic Wars - Saragossa. Yours, James D. Gray