I’m renovating a 1930’s chalet bungalow. Currently there is a ground floor bathroom and I am adding one on the 1st floor. The gable wall has a window which makes it difficult to locate a soil pipe vent. Currently there is a cast iron pipe which terminates about 3m up with an air admittance valve. In the garden there is an inspection chamber with a ground level vent (covered in chicken wire). I’d like to keep this arrangement but I’m not sure how the ground level vent would be viewed nowadays! Any thoughts?