Engineering Design and Consultancy is the leading service of MMM Group Ltd. Our legal service and accountancy partner is Imperial Advisory Ltd. If you have any questions please contact us. Planning Permission, Development Plan, Architectural & Structural Design, and Planning and Planning Appeals. Engineering Design and Consultancy is our category. In Britain, a planning application is a formal request to the local authority for planning permission to build something new, or to add something to an existing building. In most circumstances, any new building requires a Planning Application. This is usually made to the local council by a planning application consultant, known as a Local Planning Authority. If you want to build a new home or a new housing estate, you’re likely to need a planning application consultant as part of the team.