Measurement Flashcards
Definition of Gross External Area (GEA)
The **external area **of a building at each floor level
Includes: * Perimeter wall thickness, Areas occupied by internal walls and
partitions, columns, entrance halls/atria, stepped floors, lift rooms, plant rooms, Garages, areas less than 1.5m height, conservatory.
Excludes: External open-sided balconies, covered ways, and fire escapes. Open vehicle parking areas, roof terraces, canopies. Greenhouses, garden stores, fuel stores
When is GEA applicable
Residential purposes and town planning, Council Tax and rating, Building cost estimations for insurance
Definition of Gross Internal Area (GIA)
Area measured to internal face of perimeter walls at each level
INCLUDES: Areas occupied by internal walls and partitions. Chimneys, columns, stairwells, lifts, Lift rooms, plant rooms, fuel stores, toilets, showers, cleaner’s rooms, changing rooms. Loading bays. Areas with less than 1.5m head height. Garages. Conservatories.
EXCLUDES: External open-sided balconies, covered ways, and fire escapes, canopies. Greenhouses, garden stores, fuel stores
When is GIA used
Building cost estimation. For Marketing, valuation, rating and property management of industrial properties, department stores, food warehouses/superstores. New homes valuation.
Definition of Net Internal Area (NIA)
**Internal useable area **of a building measured to internal face of perimeter walls at each level
INCLUDES: Kitchens, built in cupboards, areas occupied by non-structural walls, Areas occupied by ventilation / heating grilles.
EXCLUDES: Entrance halls, atria, and landings used in common and permanent circulation areas. Areas under 1.5m, Stairwells, toilets, Lift rooms, plant rooms, fuel stores, columns, parking
When is NIA applied
Marketing, valuation, rating and property management of Shops and Offices
Principles of IMPS (International Property Measurement Standards)
Mandatory for RICS members in measurement of offices and residential, unless otherwise stated.
MUST:
-Provide date of measurements
- State measuring methodology used
- Provide plans
- Conversion factors
- Measurements and calculations shown clearly
- Retain record
- supported by computer-generated drawings
IMPS 1
The Floor Area measured to the external extent of the External Walls - GEA
Included: sheltered areas, enclosed walkways or passages, enclosed rooftop plants, areas between notional boundaries and the external perimeter of external walls. Included in measurement but must be recorded separately
IMSP2
The Floor Area measured to the internal dominant face-GIA
IMPS 3
For multi-occupied buildings for exclusive use areas (most similar to NIA)
How to measure land
- -Check boundaries on Land registry or OS plans
- -Calculate areas using digital mapping
- -Measure with a trundle wheel
What are the Zoning sizes (Method of comparison)
6.1m depth
Zone A,B,C and remainder
Zone through Partition Wall
What is the size of a brick?
215mm x 102.5mm x 65mm
What is EFA
Effective Floor Area, Used for Council Tax purposes to measure flats and maisonettes and excludes hallways and wcs
What is the Current International Property Measurement Standards (IPMS) guidance
IPMS All Buildings - 15th January 2023
What tools can you use to measure?
Laser measure, tape measure, trundle wheel
Where can you find guidance on measuring?
RICS Code of Measuring Practice 6th edition
When would you use NIA?
Shops and offices
How much area difference would you expect between NIA and GIA?
15% more for GIA
When would you use GIA?
Industrials, supermarkets
How much area difference would you expect between GIA and GEA?
3% more for GEA
When would you use GEA?
Council tax
What is NIA?
Useable building area
Where would you measure to if a property has full height windows?
The glass unless the structure makes the space unusable
