Cally Hall Farm is a mid-nineteenth century laithehouse farm, situated in an exposed, elevated position above Todmorden. The house is listed, and in a special landscape area. The house had previously been extended into the barn, leaving a collection of blockwork agricultural out buildings attached to the gable. The brief was to provide an ‘outside room’ for the new owners to enjoy the garden and the views of the surrounding countryside. The intention was for a modern extension, true to it’s time, as a contrast with the traditional form of the existing building. This contrasts with the solid construction of a new porch to the rear which retains part of an earlier parpoint walled store and a guest bedroom and bathroom which create a parallel roof line, screening the garden room and creating a more solid structure for the guest accommodation.