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Property Surveys for Sale and Lease, Estate and Facilities Management 


Working to the RICS Code of Measuring Practice (6th Edition)  As an extension to our Measured Building Survey Services. Centara carry out MBS surveys to provide accurate calculations for:

  • Gross Internal Area (GIA) – The total internal square area of within a building including but not limited to;
    • All floor space on multiple floors
    • basements
    • vestibules /porches
    • stair wells
    • lift shafts / lift rooms
    • emergency escapes routes
    • roof voids
    • balconies
    • sanitary rooms
    • columns and piers
    • plant rooms
    • Partial covered areas e.g. Walk Ways, Bike Shelter, Smoking Areas etc..
    • Canopies
    • Small voids i.e. less than 1.5m in height
    • Service rooms


  • Gross External Area (GEA) – The total external square area of within a building including but not limited to;
    • External projections and perimeter
    • internal wall footprints (structural and non-structural
    • Structural features (e.g. piers, columns, stairswells, lift wells
    • Plant and Facility Room e.g. – e.g. Lifts, tanks, fuel stores
    • Covered Area with open sides – Smoke Shelters, Bike Shed etc…
    • Balconies
    • External – Emergency Escapes (Fire Escapes)
    • Open sided Walkways
    • Vehicle Parking Areas


  • Net Internal Area (NIA) – the usable internal areas within a building. We measure the to the finished surface of the internal and/or internal partition walls.
    • Skirting, Moulding and trunking
    • Kitchenettes, Kitchens and breakouts rooms
    • built in units cupboards and storage
    • cleaners storage areas (i.e. cupboards)
    • Toilets and sanitary areas
    • service lifts and stair cases, wells
    • internal structural feature – walls, piers, chimney vertical  ducts
    • Air conditioning units and associated assets.
    • Internal parking areas.
Code of Measuring Practice, 6th edition
Code of Measuring Practice, 6th edition

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