How Are Security, Investigation and Services to Buildings Classified?

Security, investigation and services to buildings in ISIC Rev. 5, UN Statistics Division, cover private security and investigation, and services to buildings and landscapes. Private security includes guarding, monitoring and alarm services supplied under contract. Investigation includes private detective and investigation services. Services to buildings include cleaning buildings, both general and specialised, and landscape care and maintenance, supplied to owners or occupiers who do not do the work themselves.

Three kinds of outsourced help, one statistical home

Night guards and alarm monitoring for a shopping centre. Private investigation for a client who needs facts established. Office cleaning each evening, and grounds and garden maintenance at a hospital. On the surface these jobs share little: uniforms, discretion, mops, and mowers. What they share is the arrangement. Each is a service to buildings, landscapes, or their occupiers, supplied under contract by a firm that does not own or run the building itself. The shopping centre does not become a security firm because it hires guards. The hospital does not become a cleaning firm because it hires cleaners. ISIC Rev. 5, UN Statistics Division, groups the supplier by the support function it sells, and that is what holds this scope together.

The scope covers:

• Private security activities, including guarding and monitoring
• Investigation activities, including private investigation
• General and specialised cleaning of buildings
• Landscape care, maintenance, and related services to buildings

General cleaning and specialised cleaning both belong here, which matters because specialised cleaning, of facades, industrial plant, or other demanding surfaces, is sometimes assumed to be construction or manufacturing support. It is not. It is cleaning, supplied to an owner or occupier who does not do the work themselves. Landscape care works the same way: mowing, planting maintenance, and grounds care for someone else’s site is a service to that site, not agriculture and not construction.

Public order is not private security

The sharpest edge in this scope is the public and private divide. Public policing and defence sit in Section P, because they are government functions, exercised as government. Private security is a contracted service sold to a client. A uniform does not decide the matter. Authority does. A police officer and a shopping centre guard may both stand at a door, but one acts for the state and the other for a paying client, and statistics keep those roles apart for good reason: one measures the cost and scale of government, the other measures a commercial facilities market. The same logic separates building construction or major repair, in Section F, from cleaning and maintenance. Repair that rebuilds or substantially alters a building is construction. Keeping it clean and its grounds tended is not.

Two further edges that blur in practice

Operating a building as a hotel or an office is grouped by that activity, not by the cleaning or security bought in to support it. The hotel’s business is accommodation; the cleaning firm’s business is cleaning. Providing security equipment as manufacturing or retail is likewise separate: making an alarm or selling one is not the same as monitoring alarms or guarding a site under contract. A firm that both sells equipment and monitors it is doing two things, and its main activity, judged from the UNSD wording and its own description, decides its statistical home. Readers who run facilities firms should therefore describe each revenue stream separately in their own notes, rather than letting the largest contract or the best known service stand for the whole firm.

Why outsourced facilities work deserves its own figures

These services are a large part of outsourced facilities work, and their growth shows how organisations manage property and risk: what they keep in house, what they buy in, and what they pay for it. Separate statistics show whether security and cleaning jobs are growing, how they are organised, and what they cost, instead of hiding them inside the industries of the buildings they serve. A hospital’s cleaning bill, counted inside health care, would inflate health costs and hide the cleaning market. Counted here, both stories stay visible: health spending and facilities spending, each on its own terms. The full ISIC Rev. 5 structure from the UN Statistics Division spans 22 sections, A to V, with 87 divisions, 258 groups, and 463 classes, and this scope sits inside it as a reminder that support work is economic activity in its own right, not a footnote to the industry it supports.

Checking a facilities case

Locate this activity in the UNSD structure, note the exact wording at each level, and compare the neighbours: public administration and defence in Section P, construction in Section F, accommodation and office operation, and equipment manufacturing and retail. Confirm the result before it is used in a return or a register, and keep the wording that settled the matter. When a business description sounds broader than the service actually sold, the UNSD entry, read in full with its exclusions, is the corrective.

This guide only describes the classification. It does not assign a code to any reader, decide what a reader’s main activity is, or resolve any registration matter. For a real firm, the national statistical institute or business register that holds the record should confirm the placement, on the firm’s complete facts.