Air Quality Assessment for Landlords & Property Managers

Starting with the lease and building boundary

A useful scope identifies the landlord's central systems, the tenant's demised space and any interface between them. Central air-handling units, risers, shared intakes, common corridors and landlord controls may sit on one side; tenant fan-coil units, local extract, fit-out materials and occupancy practices may sit on the other. We review the relevant information with the managing agent and record the boundary so findings can be directed appropriately without assuming responsibility from the complaint alone.

Common parts and central-plant evidence

The assessment can combine occupied-area IAQ measurements with an inspection of accessible central ventilation components and hygiene records. Real-time logging may cover CO₂, temperature, humidity, particulates or TVOC for an agreed occupied period. Specific laboratory sampling is used where the building history justifies it. Ventilation hygiene work may include visual inspection, deposit thickness testing or another applicable method at representative accessible locations. Plant condition and occupied-space results are interpreted together while recognising that each answers a different question.

Handling a tenant complaint fairly

We define the reported location and timing, compare affected and unaffected areas, note occupancy and plant operation, and review recent maintenance or fit-out changes. This creates a shared factual record for landlord and tenant. Measurements can show whether a pattern follows central ventilation, a local activity, a tenant-controlled installation or a transient condition. Where the evidence cannot allocate a source conclusively, the report explains the remaining possibilities and proposes a focused next check.

1. 1

   Record the concern

   Capture locations, times, tenant observations and relevant lease or maintenance responsibilities.

2. 2

   Agree comparison points

   Select complaint areas, common parts and suitable spaces served by the same or different systems.

3. 3

   Measure representative use

   Log appropriate parameters across an agreed occupied period and inspect relevant accessible assets.

4. 4

   Allocate the next action

   Direct evidence to the landlord, tenant, HVAC contractor, fit-out team or another specialist as appropriate.

Void periods, re-letting and handover

A void unit provides an opportunity to record condition before a new fit-out changes the indoor environment. A baseline can document ventilation hygiene, indoor conditions and visible issues, but measurements in an empty space do not represent future occupied performance. Before re-letting, the report can identify maintenance or investigation items for the asset plan. After fit-out, pre-occupancy testing can address material emissions and readiness; later occupied testing can examine how the completed space performs under normal use.

Transparent service-charge evidence

Where ventilation hygiene inspection or related work is recovered through a service charge, the evidence should show why it was commissioned and what was delivered. We record the systems and representative locations assessed, the method, photographs, results, access limitations and recommendations. If a cleaning contractor completes work, independent post-clean verification can check the specified outcome. This gives occupiers a clearer line from condition evidence to scope, contractor activity and close-out.

Reporting for owners, agents and tenants

The report opens with the property question and a concise finding, followed by methods and location-specific evidence. Actions distinguish central-plant work, tenant-side investigation, housekeeping, fit-out review or further monitoring. Technical detail supports consultants and contractors, while a plain summary helps communication with occupiers. Follow-up verification can document change after agreed work.

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Commercial Property Air Testing is intended for acquisition, disposal, asset planning and investor due diligence. Facilities Managers is for in-house teams planning annual evidence across occupied operations.