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Energy and domestic water submetering show how much a particular tenant space, floor, circuit, system, or unit uses, rather than reporting only a building’s total consumption. The main benefit is better information: owners and operators can use it to find anomalies, target maintenance and efficiency work, allocate costs where permitted, and check whether improvements worked. A meter does not save energy or water by itself; savings depend on people reviewing the data and acting on it.
For construction teams and building owners, the key question is not simply whether to add meters, but what decisions the readings need to support. That purpose should guide meter locations, plumbing and electrical design, data systems, access for maintenance, and the building’s operating plan.
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What are the benefits of energy and water submetering?
Submetering adds detail below a property’s main utility meter. A main meter can show total building consumption, while submeters can separate use by tenant, floor, circuit, piece of equipment, or water-intensive activity. That finer view helps a building team connect consumption to the spaces and systems it is responsible for managing.
The U.S. General Services Administration’s submetering guidance describes applications such as tenant spaces, lighting circuits, heating and cooling systems, boilers, and chillers. For water, the EPA WaterSense guide to metering and submetering includes uses such as individual buildings, tenant areas, irrigation, and cooling.
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With useful readings and a response plan, submetering can help a property team:
- Find unusual consumption. Compare a space or system with its own baseline or with similar periods. A persistent change can prompt investigation of a leak, malfunction, control problem, or changed use.
- Focus maintenance. System-level energy data can help operators identify equipment that may not be operating as expected and prioritize inspection or service.
- Target efficiency work. More granular data can help show where an efficiency measure is most relevant instead of treating the entire property as one undifferentiated load.
- Check project results. Readings before and after an operational change or retrofit can help determine whether consumption changed. A credible comparison still depends on consistent measurement and appropriate interpretation.
- Allocate costs or inform occupants. Unit-level information can make consumption more visible. Whether it can be used for tenant billing—and how—depends on applicable law, utility arrangements, and the building’s billing setup.
- Benchmark and document performance. Separate readings can support comparisons across areas, uses, or time periods and may contribute to building-performance or certification work.
These are potential outcomes, not automatic returns from installing hardware. GSA puts the distinction plainly: “the meter itself does not save energy but can drive action based on review of the data.” The U.S. Department of Energy’s executive summary on building energy and water submetering similarly emphasizes that meter data informs performance; the meter alone does not directly reduce resource use.
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Not on its own. Submetering measures use; operational changes, repairs, controls, occupant feedback, or other follow-up actions are what may reduce consumption. If nobody reviews the readings, or the building lacks the ability to act on an alert, installing meters may add cost without producing meaningful efficiency gains.
A useful program connects three things: a measurement, a decision, and a responsible person. For example, a water reading that suggests continuous flow needs a defined process for checking for a leak. An energy trend that points to a problem with a building system needs an operator who can investigate schedules, controls, or equipment condition. The precise trigger and response depend on the building; the data should not be treated as a diagnosis by itself.
Before specifying a system, define what the building team intends to do with the information. “Improve efficiency” is too broad to guide meter placement. A clearer objective might be to separate tenant consumption, monitor a major system, spot possible water leaks, or verify the effect of a planned project. The objective determines what to measure, at what level of detail, and who needs access to the readings.
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What can energy submeters tell a building team?
Energy submeters can break a building’s total use into areas or loads that are meaningful for operations. Depending on the design, readings may distinguish a tenant or floor, a lighting circuit, or equipment such as a boiler or chiller. This makes it easier to establish a baseline, compare performance over time, and direct investigation toward a particular load rather than the whole building.
That information can support maintenance and reliability as well as energy management. If consumption differs from an expected pattern, operators have a reason to check the relevant equipment or controls. Submetering can also support more accurate cost allocation or revenue capture in appropriate arrangements. Those business benefits depend on the property’s lease, utility, and regulatory context; a meter reading alone does not establish what a tenant legally owes.
In multifamily buildings, unit-level energy readings may also help residents see and influence their consumption. The New York State Energy Research and Development Authority describes resident visibility and control, demand response, and on-site cogeneration as opportunities in the context of its New York multifamily submetering programs. Its program conditions are specific to New York and should not be assumed to apply in other jurisdictions. Owners elsewhere should check local utility arrangements, rules, and available programs directly.
What can domestic water submeters reveal?
Water submeters can separate a building’s water use by building, tenant area, unit, irrigation, cooling, or another relevant part of the property. That can help operators identify where to investigate possible leaks or equipment problems, assess water-efficiency opportunities, allocate costs where allowed, and compare use before and after a project. Water readings can also support reliability efforts and help extend equipment life when they expose problems early enough for corrective action.
For multifamily properties, unit-level water information can help a manager distinguish a possible problem in one apartment from a change affecting the whole building. The Department of Energy’s Building America Solution Center guide to multifamily water metering describes individual monitoring as a way to increase resident awareness and help identify possible unit-specific leaks.
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EPA’s Technical Reference Manual for WaterSense-labeled homes reports that residents in submetered multifamily units used approximately 15 percent less water than residents in unmetered units, citing one national study. Treat that as a reported finding, not a forecast for a particular property: the cited passage does not identify the underlying study, and results will depend on the building, occupants, feedback, and response to the data. It is not a guaranteed saving or a basis for assuming a specific project payback.
A facility-owned water submeter is also different from a separate utility meter and account. EPA notes that facility-owned submeters commonly do not require separate utility accounts and generally do not create separate utility meter connection or recurring meter charges. This does not settle local billing rules or the terms of a tenant billing arrangement; confirm those separately before designing a system around cost recovery.
Can an existing multifamily building be submetered?
Often, but feasibility depends on how services enter and run through the building. Unit-level water measurement is simplest when each unit has a single supply line that can be metered. If several pipes or sources feed the unit, each relevant source may need its own meter, or a retrofit may require plumbing changes. That can affect installation scope, access, disruption, and cost.
For a retrofit assessment, first map the actual plumbing or electrical distribution that serves the target area. Then confirm whether the proposed meter locations capture all relevant use and whether they can be accessed for installation, reading, inspection, and repair. A meter on only one of several feeds will not represent total unit consumption. Construction and facilities teams should review the layout together, especially where walls, risers, tenant spaces, or existing building systems constrain access.
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If direct unit-level water metering is impractical, the DOE guide describes alternatives such as flow sensors or end-use meters on major appliances. A central system may collect those readings and use them to estimate unit use against the building’s master-meter records. Keep the distinction clear: an estimate based on selected end uses is not the same as direct measurement of all water entering a unit.
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How should a project choose meter locations and equipment?
Start with the question the data must answer, then choose the measurement points and equipment to match. Metering more points is not automatically better: each additional point can add installation, data, maintenance, and interpretation work. A smaller set of well-chosen readings may be more useful if it supports a clear operational decision.
- Set the objective. Decide whether the priority is tenant allocation, system diagnostics, leak detection, benchmarking, project verification, occupant feedback, or a combination. Record who will use the readings and what decisions they are expected to make.
- Define the boundary. Identify the tenant, floor, circuit, equipment, water source, or end use to be measured. Confirm that the proposed point captures the full load or flow relevant to the objective.
- Check system fit. Select equipment for the utility type, expected load or flow range, accuracy needs, and any existing monitoring or building-management systems. Decide whether data needs to be available centrally or integrated into an existing operating process.
- Review the building layout. For water, confirm pipe routes, unit feeds, access, and installation conditions. For energy, identify circuits and systems that can be measured in a way that corresponds to actual operational boundaries.
- Plan the data workflow. Specify who reviews readings, how often, what warrants an alert or investigation, and who is authorized and available to respond. Consider what information is useful to residents or tenants and how it will be communicated.
- Budget for the lifecycle. Consider hardware and installation alongside software, data services, maintenance, staff training, and the ongoing improvement program. Compare those costs with benefits that are plausible for this building—not with an assumed universal savings rate.
- Confirm rules and responsibilities. Check local utility requirements, applicable tenant-billing rules, and any relevant incentive or demand-response program before relying on those arrangements in the design.
The DOE executive summary stresses that hardware and software should be selected to meet defined analysis and operating objectives, with trained staff and ongoing maintenance. Integration with building automation or operations procedures can help when it supports a real workflow; integration is not a substitute for deciding who will interpret the data and act.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What should construction teams know about water-meter sizing and installation?
Water meters must be suited to the flow range they will encounter and installed so that readings remain useful. The DOE Building America Solution Center guide cautions that an undersized meter can cause pressure loss, reduced flow, and noise. An oversized meter may not measure low flows accurately—the very small flows that can matter when trying to detect leaks.
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Residential water use can vary from low to peak flows, which is why the guide identifies positive-displacement meters as often suitable for residential applications. That is general guidance, not a specification for every building. Confirm the meter type and size with the manufacturer, utility, or a qualified installer using the expected flow range and the project’s conditions.
Plan access for reading, inspection, and repair, and follow the manufacturer’s installation instructions. Sediment can affect accuracy; DOE notes that a strainer can help prevent sediment-related inaccuracies. Installation conditions also matter, so meter selection should be considered alongside pipe layout and the intended measurement—not left until the finish-stage coordination when access may already be difficult.
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What are the limits and costs to account for?
Submetering has both technical and organizational limits. A meter only reports the part of the system it measures, so incomplete coverage can produce a misleading picture. Readings may flag an anomaly without identifying its cause. A water trend, for instance, can indicate a need to investigate, but the data alone does not establish whether the source is a leak, an operating change, or a measurement problem.
The economic case is building-specific. The DOE report notes that building type, use, climate, regulations, and utility rates affect the economics of submetering. A lifecycle assessment should include equipment, installation, software, data services, maintenance, and staff time—not just the price of the meters. It should also consider whether the building has realistic opportunities to act on the data, improve operations, verify work, or allocate costs lawfully.
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Ultimately, the strongest case for submetering is not that every building will achieve a particular percentage reduction. It is that the added information enables a specific, worthwhile operating or management decision that the main meter cannot support by itself.
Frequently Asked Questions
Can a water submeter reading be used to bill a tenant?
Not automatically. A reading can provide consumption information, but whether and how a landlord may use it for billing depends on local law, utility rules, leases, and the billing arrangement; verify those requirements before treating meter data as a charge.
How often should a building operator review submeter data?
There is no single review interval that fits every system. Set the cadence around the purpose and the ability to respond—for instance, a possible leak alert is useful only if someone can investigate promptly, while benchmarking may use longer reporting periods.
Do submeters need calibration or ongoing maintenance?
They need an operating and maintenance plan, including access for inspection and repair and attention to installation conditions that could affect readings. Follow the equipment manufacturer’s requirements and consult the utility or a qualified installer about applicable verification practices.
Is submetering better installed during new construction or as a retrofit?
New construction can make it easier to coordinate meter locations, access, and wiring or plumbing routes before spaces are closed in. Retrofits can still be worthwhile, but feasibility depends on existing distribution, whether every relevant feed can be measured, and the disruption and cost of gaining access.
