Developments OpenArch have an ongoing programme of developments and refurbishments. Here you can see a selection of some of our recent work. Pavilion Chambers, High Street St. Neots - succesful GPDO conversion of above-shop office to twelve professional apartments. 294c Mill Road, Cambridge - extension at the rear of the existing building to create a 5 bedroom HMO. High Street, Saffron Walden - redevelopment of a listed building to create re-modelled retail units and 5 flats. Pakenham Close, Cambridge - full refurbishment and reconfiguration of an existing HMO. 35 Mill Road, Cambridge - full redevelopment to create a 9 bedroom HMO. 57 Cherry Hinton Road - comprehensive refurbishment of 6 bedroom professional HMO including kitchen englargement.