Black & White Facilities / Service brief
Sub-Metering
Use sub-metering to answer a specific question about the energy used within a defined area or system. Where a building-wide bill cannot explain background demand or differences between areas, a clear measurement boundary helps determine where additional meters should be placed.

Overview
Define what the facilities team needs to understand and the issue prompting additional measurement. Record the location, users affected and changes in building activity, so the brief addresses present operating questions rather than reproducing a previous metering arrangement.
Our full service catalogue, including every individual service, is available across every listed sector and location. For one site or several, we agree the scope, access and programme around the buildings concerned.

What the service can include
The instruction defines areas or loads, meter selection, installation, communications and reporting. Document measurement units, the extent of coverage and the relationship to the main supply. If readings will support billing, assess that purpose and its arrangements separately.
What to consider
Sub-meter readings may not account for all energy at the main supply. Loads outside their coverage, mismatched timing and missing data can create differences. Explain these limitations in reporting instead of making unsupported adjustments to force matching totals.
Our sub-metering proposal defines the work instructed and the duties retained by the property or facilities team. Related repairs and specialist activities have clear separate scopes, including who will arrange them and the records to be handed over.
Before we visit
Provide utility or electrical drawings, main-meter readings and details of the systems under investigation. Confirm access and available shutdown periods. Set the reporting frequency and name the person who will use the measurements.
How we help
We agree the area or load to be measured and installation needs before defining meters and data arrangements. Handover records coverage, identifiers and access. Interpret early readings against the operating context, with known information gaps kept visible.
For several buildings, agree a consistent approach to reporting and escalation while retaining local contacts and requirements. Keep actions attributed to their building or service area, with a named decision route where wider operations are affected.
What affects cost and timing
Costs reflect meter quantities, routes, access, communications and reporting requirements. Shutdown arrangements and continuing data services may add work. Balance the information required against the practical effort involved in maintaining the installed meters.
Flag operational hours, critical periods and the activities that must remain available during installation. Reflect any phasing, additional access arrangements and required reporting in the programme and price.
Sector applications
Access for sub-metering work follows the use of the premises: staff and visitors in Offices, trading and deliveries in Retail, and food operations and guest areas in Hospitality. Plan around teaching in education. Our full service and project offering covers all sectors, with local activity reflected in the working arrangements.
Local coverage
For sub-metering enquiries, we cover Northumberland, Tyne and Wear, County Durham and Tees Valley and locations including Berwick-upon-Tweed, Alnwick, Morpeth, Hexham, Newcastle, Gateshead, Sunderland, Durham, Darlington, Hartlepool, Stockton-on-Tees and Middlesbrough. Full geographical details are set out under View all locations.
For a portfolio instruction, provide contacts and working restrictions by address. Record the differences between premises within the common sub-metering brief rather than assuming the same arrangements apply throughout.
Frequently asked questions
Can sub-meter totals differ from the main meter?
Yes. Differences in coverage or timing, plus loads outside the sub-meters, can produce a gap that warrants investigation.
Does a sub-meter automatically support tenant billing?
No. Confirm billing requirements and whether the proposed meter is suitable through a separate assessment.
Can one meter identify every equipment load?
A meter directly measures only its defined load boundary; identifying further detail may need a different arrangement.
Can sub-metering support an energy audit?
Yes. Choose measurements that address a defined operating question so they add useful visibility to the audit.
Knowledge and guidance
Before defining measurement requirements, related reading includes planning an energy improvement project and building management systems explained. The service context is covered by Official guidance, with other material collected in the Knowledge Centre.
Related services and your next step
To connect new measurements with reporting, see Metering and Monitoring and the wider Energy and Renewable Technologies offering. For ongoing care or smaller works, explore maintenance and Minor Works. The complete services and projects directories set out other options.
Start a sub-metering enquiry with the sites, existing records and the result the operational team needs. Contact Black & White Facilities with this information and the working restrictions so we can define the scope and next step.
Discuss the scope
Tell us what needs attention.
Share the site, the issue and any access requirements so we can discuss the next step.