Hamilton County Apartment Building Electricity: Multi-Site
Apartment Buildings · Hamilton County, Ohio
Market-reference note: Numerical default-price examples below retain their cited 2026 reference period. They are historical class-level context, not a current account quote. Confirm the applicable business rate, components and effective dates on your bill before comparing an offer. How to establish your benchmark.
Can several apartment owners in Hamilton County share one electricity contract?
Every investor-owned-utility site in Hamilton County is on Duke Energy Ohio, so one supplier can price the whole portfolio on a single rate structure.
Rural sites served by an electric cooperative — Butler Rural Electric Cooperative — are in the same position.
Portfolio math for apartment owners in Hamilton County
Take an illustrative operator with three smaller and two mid-size locations (24 units, master-metered and 100 units, master-metered):
| Portfolio measure | Estimate |
|---|---|
| Combined annual use | 1.66 million kWh |
| Combined capacity tags | about 303 kW |
| Capacity cost at 2026/27 price ($329.17/MW-day) | about $36,369 a year |
| Illustrative tags at the 2024/25 RTO reference ($28.92/MW-day) | about $3,195 a year |
| Value of each 0.5¢/kWh in supply price | about $8,286 a year |
How these numbers are built: annual use = EIA RECS 2020: 6,093 kWh per household in 5+ unit buildings. Peak demand assumes a 50% load factor; the capacity tag assumes 80% of that peak falls in the grid's summer peak hours. Capacity cost uses PJM's 2026/27 clearing price of $329.17/MW-day (about $120 per kW-year) before utility scaling factors. These are illustrations for sizing a decision — your own bills and interval data are what suppliers price.
At that combined size the operator is a meaningful account for suppliers, even if each location on its own is below Ohio's 700,000 kWh-a-year “mercantile” line. Each account's aggregation eligibility is still judged site by site.
Utilities and default prices across Hamilton County
| Utility | Small-business default generation price | Cities on this site in the county |
|---|---|---|
| Duke Energy Ohio | Historical class reference: 11.36¢/kWh (effective June 1, 2026) | Cincinnati |
Structuring a multi-site contract
- Master agreement with site schedules. Sign one agreement and list each location on a schedule, so opening or closing a apartment building is an amendment, not a new negotiation.
- Add/delete rights. Ask for the right to add new locations at the contract price (or a formula) and to remove closed locations without penalty up to a set share of volume.
- Aggregate bandwidth. Measure usage tolerance across the whole portfolio rather than meter by meter, so one busy site doesn't trigger true-up charges.
- Co-terminous end dates. Put every site on the same end date so the next bid covers the full portfolio.
- Aggregation exits. Locations at 700,000 kWh a year or less may be in a community aggregation program; confirm how each will be moved to the new supplier and whether any exit terms apply.
Operating issues specific to apartment owners
EIA data show residential summer load rising through the day to a peak around 5–6 p.m., with winter morning and evening peaks — so master-metered buildings follow household patterns.
Across a portfolio, the biggest wins usually come from standardizing settings and comparing sites against each other. For apartment owners, that means:
- Convert corridor, stairwell and parking lighting (24/7 loads) to LED with occupancy controls.
- Put common-area HVAC and amenity spaces on schedules.
- Consider submetering master-metered buildings where Ohio rules and leases allow.
If the property is in a community with opt-out aggregation, house meters under 700,000 kWh a year may already be enrolled.
FAQ
Can a apartment building operator buy electricity for all Hamilton County locations together?
Yes. A supplier can put every shoppable site under one agreement, all priced on Duke Energy Ohio's rate structure.
Which Hamilton County locations can't be included?
Sites served by electric cooperatives (Butler Rural Electric Cooperative) generally can't be enrolled with a retail supplier.
Can an owner combine house meters from several properties?
Yes, portfolio contracts across properties are common.
Related: Apartment buildings & multifamily in Ohio · Hamilton County utilities · single-site apartment building costs in Cincinnati
Decision worksheet: Hamilton County apartment building operations
Do not confuse Hamilton County with Hamilton city
This page concerns Hamilton County, including Cincinnati. The City of Hamilton is in Butler County and has a municipal electric utility. Match each service address and bill utility; never infer Duke service from the word Hamilton alone.
For a apartment building in this market, the useful starting evidence is owner-paid loads separately from individually billed apartments. This is a review question, not an assumption that every local facility has the same equipment or schedule. Record what your site actually does, then explain the difference between the historical bill period and the proposed contract term.
| Delivery-utility guide for Hamilton County | Evidence needed before pricing |
|---|---|
| Duke Energy Ohio | Confirm the actual account class and contract; service territory is not the same as a county boundary. |
The local guide is a starting map, not an address-level enrollment determination. Keep utility bills and account identifiers in the private document package, not the initial website inquiry. The Ohio bill guide explains how to identify the delivery and supply companies.
A apartment building review should test these operating questions
- Load separation: identify common-area systems, central services and resident metering. Distinguish electricity use from gas, water and other operating costs before comparing a retail electric offer.
- Change case: document a boiler-to-heat-pump project, EV charging or occupancy changes. Ask the supplier whether that change affects quoted volume, capacity treatment, demand assumptions or the offer’s validity.
- Comparable performance: track common-area kWh per occupied unit, not a mix of tenant and owner bills. A raw dollar-per-month comparison mixes prices and operations; a unit measure needs the operating context beside it.
- Account responsibility: Which costs legally belong to the landlord’s accounts? Record the responsible party and who can authorize a contract before asking someone to sign.
- Contract fit: Does a property sale permit assignment of the supply agreement? Ask for the answer in the actual agreement or written offer schedule, rather than relying on a sales summary.
Evidence table for the next decision
| Question for this apartment building | Bring this evidence | What a useful answer looks like |
|---|---|---|
| Has the bill risen because of price or operations? | Same-period kWh, peak kW where billed, hours and production/occupancy records | A separation of rate, volume and demand effects; no automatic savings claim |
| Will the next term resemble the last twelve months? | The planned a boiler-to-heat-pump project, EV charging or occupancy changes | A base case and a change case, with supplier tolerances shown |
| Are supply offers priced on equal terms? | Start dates, included components, additional fees and offer expiry | One comparison matrix that identifies every excluded or adjustable item |
| Is the site free to enroll when proposed? | Current agreement, renewal notice and actual utility confirmation | A documented timeline that avoids an unintended rollover or early-exit charge |
Portfolio review across Hamilton County
Use a separate row for every property rather than one total for the whole business. Start with Cincinnati. A common owner can negotiate a master agreement, but meters still have their own rate classes, delivery utilities, start dates and operational constraints. Do not assume that pooling bills creates a volume discount or makes a municipal meter eligible.
For apartment owners, preserve common-area kWh per occupied unit, not a mix of tenant and owner bills at site level before rolling it into a portfolio dashboard. Otherwise a busy or continuously operating location can hide the cost of an idle one. Align contract end dates only after identifying any early-exit costs, add/delete rights and ownership-transfer provisions.
Turn this into a review request
Use the private comparison and renewal tools for a first pass. They do not submit your figures. If you want help, choose “Offer comparison” or “Renewal planner” on the Ohio inquiry form, identify Hamilton County, and describe the question without account numbers or attachments. A supplier bid follows only if the account and decision support that step.
Primary reference points: PUCO electric-bill definitions, Ohio customer classifications and customer-choice guidance. Operating prompts above are planning guidance, not measured local savings or a claim about a specific customer.
Historical capacity comparison note: $28.92/MW-day is the 2024/25 RTO reference, not the 2024/25 DEOK zonal result. Duke’s DEOK zone cleared higher that year. A wholesale comparison is not the account’s retail tariff or a supplier quote. See PJM auction records.