Post Office – Mirfield, Greenside – Opening Hours & Branch Details Post Office is easy to get to at 80 Greenside Road, a 0.60 mile driving distance north-east from the centre of Mirfield (by Greenside Road Greenside Estate). The branch is fittingly located to serve patrons from the districts of Ravensthorpe, Battyeford, Mirfield Town Centre, Dewsbury Moor, Flush, Millbridge, Lower Hopton and Heckmondwike. Doors are open here today (Friday) from 6:00 am to 10:00 pm. On this page you’ll find all the relevant information about Post Office Mirfield, Greenside, including the business hours, location info or customer experience.