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New Service/Upgrades

Building a new home or business? Renovating and upgrading your business electrical service?

Our Technical Service Layout process walks you through the requirements for connections, rolls and responsibilities and establishes the point of connection for the service.

To get started, complete our Application for Electrical Service Form.

We recommend that you apply early. Depending on the requirements of your service, the process can take several weeks.

If you have questions about the process before you apply, please contact our Engineering Department at 519-853-3700 x213 for a free consultation.

Renovating and upgrading your residential electrical service? Depending on your address and the type of upgrade, you may not need a Technical Service Layout. Most subdivisions built since 2004 already have 200A services to the house. If you live in one of these areas, you do not need a Technical Service Layout. You simply need to schedule a temporary disconnect/reconnect with us to allow your electrician to complete their work.

Select the maps below. If you live on one of the streets highlighted on the map, your address already has 200A service to the house. Have your electrician contact our Engineering Department at 519-853-3700 x213 to schedule a temporary disconnect/reconnect.

If you do not live in one of these areas, or are looking for a service size larger than 200A, complete our Application for Electrical Service Form above.

Acton streets with 200A Supply

Georgetown streets with 200A Supply

All new services shall be rated a minimum 200A up to the demarcation point. HHHI’s standard voltage offerings are:

  • 120/240V (single phase)
  • 120/208V or 600/347V (three phase, four wire)

All new, upgraded, or modified services shall be installed as per HHH’s Conditions of Service.

  1. Complete the Application for Electrical Service Form to begin the Technical Service Layout Process.
  2. Pay the appropriate Service Layout Fees. Fees can be paid online: Pay Online Now or by calling 519-853-3700 x211.
    • Residential: $333.98
    • Commercial/ Industrial: $838.41
  3. Once payment is received, an Engineering Technician will contact you within 10 business days to discuss your request and set up a site meeting if required.
  4. You will receive an Offer to Connect and Layout (site drawings) along with specifications and connection requirements within about 60 days following HHHI having received all necessary information for the service.
  5. The Offer to Connect will show the Connection Fees required to complete the work.
  6. Sign and return the Offer to Connect along with payment of the Connection fee.
  7. If the application is for a new electrical service, the applicant will receive an electricity account application. This form is to be completed by the customer who will pay the electricity bill at the address.
  8. The applicant’s qualified electrical contractor will perform their work and have the Electrical Safety Authority Inspect the work on the customers’ side of the demarcation point. HHHI will require a Connection Authorization for any service connection.
    • For most residential service upgrades, connection can be coordinated by calling Halton Hills Hydro’s Engineering Clerk at Ext. 213.
    • Where construction is required, such as a service trench, pole or anchor installation, or transformer installation the applicant or their contractor should be coordinating their project with HHH’s Engineering Technician that prepared the Technical Service Layout.
  9. Depending on the type of work being completed, HHHI inspections may be required. This will be communicated to you as part of the Offer to Connect.
  10. Once ESA Connection Authorization is completed, HHHI will schedule work to complete the connection. This is typically scheduled within 5 business days of receiving the Connection Authorization.

Some services may require a new transformer. Transformer ordering can take 20-24 weeks.

HHHI only orders transformers once the Connection Fees have been paid.

When applying for a Technical Service Layout please have the following information ready:

  • Applicant’s name, address, phone numbers, email.
  • Type of service layout requested (residential/ commercial).
  • Type of request: new service, service upgrade, or temporary service.
  • Service size (amperage) and secondary voltage (120/240V, 120/208V, 600/347V) needs.
  • Site drawings.
  • Electrical equipment drawings, equipment ratings, Single Line Diagram, demand load calculations (commercial applications).

Applicants should note that HHHI has specific limitations on the size of transformer that we will supply and connect to our distribution system. Applicants will be required to supply and install their own transformation and related equipment when:

  • The applicant requires greater than 300kVA of transformation where the distribution feeders voltage 4160GrdY/2400V or 8320GrdY/4800V. The applicant will be connected to HHHI’s 44kV sub-transmission system.
  • Where an applicant requires greater than 1500kVA of transformation when connecting to the 27600GrdY/16000V distribution system.

To review HHHI’s demarcation points please review appendix C in our Conditions of Service. A demarcation point is the point where ownership of assets changes from the utility to the customer.

When do I need a Technical Service Layout?

If you are building a new home or business or you are upgrading or modifying your existing service or meter location, you need a Technical Service Layout.

When do I not need a Technical Service Layout?

The following scenarios do not require a Technical Service Layout:

  • Many homes built after 2000 have electrical supply up to the meter rated for 200A services. Even if the builder only installed a 100A rated electrical panel, the service may be rated for 200A.
  • Select the maps below. If you live on one of the streets highlighted on the map, your address already has 200A service to the house. Have your electrician contact our Engineering Department at 519-853-3700 x213 to schedule a temporary disconnect/reconnect.
  • If you do not live in one of these areas, or are looking for a service size larger than 200A, complete our Application for Electrical Service Form.
  • If you are upgrading a fuse panel to a circuit breaker panel, a TSLO is not required.
  • Replacing the service mast on an overhead service
  • In these cases, a service upgrade is not required, only a disconnect/ reconnect to allow your electrician to complete the work. Contact us at HHHEngineering@haltonhillshydro.com to inquire.

I’m building a new house on a rural property. How far can I build my house from the road before I need a primary service and transformer on property?

All new services shall be constructed underground from Halton Hills Hydro’s road circuit into the property. Our Conditions of Service state that for secondary services (eg. 120/240V), the maximum length of supply from pole to house permitted is 90m (including length of cable installed on the utility pole and at the meter base. If your house is build more than 90m from our poles along the road, a primary service with padmounted transformer on property is required.

Who installs an underground service?

The customer is responsible for installing underground services including transformer base, ground loop, primary and secondary trenches, conduit, cable, and meter base/ cabinet. The Technical Service Layout for your specific site will provide greater details of our requirements.

I am building a new house/ business where there are no power lines. How do I get power to the site?

To begin the process of getting power to your property, complete the Application for Electrical Service Form at the top of this page. We will work with you to establish the best method for getting power to your site, timeframe, and costs. You can also contact us at HHHEngineering@haltonhillshydro.com or 519-853-3700 Ext. 213 for a consultation.

How close can I build my house/ business to a power line?

Buildings should be constructed at minimum of 4.0m (13ft) from an overhead power line to ensure safety. This minimum meets the Ontario Building Code requirements and Ontario Electrical Safety Code requirements related to proximity of buildings to electrical power lines.

Halton Hills Hydro’s website has many construction standards. Can I use these for my service?

The standards on our website are posted for ease of customer access. The specific standards that apply to your situation will be provided to you as part of the Technical Service Layout process.

I am experiencing power quality issues (eg. flickering lights, equipment not operating as expected). How can Halton Hills Hydro help me?

If you are experience power quality problems, please visit our Power Quality page and complete the online form. We will contact you to discuss your concerns and determine how we can help you.

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