There is this franchise cleaning company around me, they do window cleaning, think I see them once around, but they ranked petty high on google. I bet you cannot guess the price... they quoted me. I asked for a quote for this: 12 normal windows which two are bay windows and two of the windows on back are on the third floor. I asked for one off and monthly. Two bays, one window and a door on front side. Door and three small on side. Back two on ground, two on 1st floor, two on top floor. Nothing major! Say a price I bet you wont guess it, either that or im super cheap! For first clean and then monthly..