For that style of house I'd use an S-pole or just the pole mount to mount the camera to the gutter. Where the gutter is fixed just below the level of the windows is about the top-end of the optimum installation height (3.3m). Remember that the camera angle is between 105-degrees (2.7mm camera) and about 70-degrees (4mm camera lens). So to cover the whole back garden you'll need two cameras.