Eversource Energy Headquarters & Corporate Office

About Eversource Energy

Eversource Energy is New England’s largest energy-delivery company and a major regulated electric and natural-gas utility serving customers across Massachusetts, Connecticut, and New Hampshire. Its businesses operate through regulated subsidiaries including The Connecticut Light and Power Company, NSTAR Electric Company, NSTAR Gas Company, Public Service Company of New Hampshire, Eversource Gas Company of Massachusetts, and Yankee Gas Services Company. The company’s operating roots extend back to numerous historic New England utility businesses that were gradually combined through mergers and acquisitions.

Eversource currently serves approximately 4.46 million customers and employs more than 10,000 people. The company is led by Joseph R. Nolan Jr., Chairman, President and Chief Executive Officer. Eversource’s operations focus on electric distribution, transmission, natural-gas distribution, grid modernization, energy efficiency, outage restoration, customer energy programs, electric-vehicle infrastructure, battery storage, and other clean-energy investments.

A major recent corporate change occurred in 2026. Eversource completed the divestiture of Aquarion Water, leaving the company positioned as a pure-play regulated electric and natural-gas delivery company rather than an electric, gas, and water utility. Current SEC materials identify Eversource Energy’s principal executive office as 300 Cadwell Drive, Springfield, MA 01104, with additional general business offices in Boston and Hartford.

Quick Information

Corporate Phone Number

800-286-5000

Current 2026 SEC filings identify this as Eversource Energy’s corporate telephone number.

Customer Service Number

Customer-service numbers vary by operating territory

Connecticut: 800-286-2000
Eastern Massachusetts: 800-592-2000
Western Massachusetts: 877-659-6326
New Hampshire: 800-662-7764

Corporate Office Address

Eversource Energy
300 Cadwell Drive
Springfield, MA 01104
United States

Headquarters Address

Eversource Energy
300 Cadwell Drive
Springfield, MA 01104
United States

This is the current principal executive office identified in 2026 securities filings.

Email

Investor Relations: investorrelations@eversource.com
Careers / Recruitment Fraud: careers@eversource.com

General utility Customer Service is primarily handled by phone, web account, chat, and service-area contact channels.

Industry

Electric Utilities, Natural Gas Utilities, Energy Transmission, Energy Distribution, Grid Infrastructure and Energy Efficiency

Founded

Eversource traces its roots to multiple New England utilities dating to the 19th century. The modern company evolved through the combination of Northeast Utilities, NSTAR, and other utility businesses.

Number of Employees

More than 10,300 employees

Current July 2026 company information cites more than 10,300 employees across its three-state system.

Number of Customers

Approximately

4.46 million customers.

Corporate Office Hours

Corporate-office walk-in hours are not broadly promoted.Customer-service hours and emergency-service availability vary by operating company and region.

Website

https://www.eversource.com/

Investor Relations

https://investors.eversource.com/

Investor Relations

781-441-8862
investorrelations@eversource.com.

Careers Page

https://jobs.eversource.com/

Eversource Energy Products & Services

Electric Distribution

Eversource delivers electricity to residential, commercial, municipal, and industrial customers through regulated distribution networks in Connecticut, Massachusetts, and New Hampshire.The company maintains local lines, substations, meters, and related infrastructure while coordinating outage restoration and system reliability.

Electric Transmission

Eversource owns and operates high-voltage transmission infrastructure that moves electricity across New England.Transmission investment is a major part of the company’s long-term strategy as regional demand, electrification, and renewable-energy integration increase.

Natural Gas Distribution

Eversource distributes natural gas through regulated gas utilities in Massachusetts and Connecticut.Services include gas connections, metering, pipeline maintenance, safety inspections, emergency response, and customer billing.

Residential Electric Service

Residential customers receive regulated electricity delivery, meter service, outage support, account management, and energy-use information based on the Eversource operating territory serving their property.

Residential Natural Gas Service

Eligible customers in Eversource gas territories can receive natural-gas delivery for heating, water heating, cooking, and other residential uses.

Business Energy Service

Eversource serves commercial and industrial customers with electricity and natural gas.Business customers can access billing support, energy-efficiency programs, service-upgrade coordination, demand-management resources, and infrastructure planning.

Energy Efficiency Programs

Eversource provides energy-efficiency services for homes and businesses.Programs may include energy assessments, rebates, technical support, contractor programs, efficient equipment incentives, and measures designed to reduce energy consumption.

Electric Vehicle Programs

Eversource supports electric-vehicle adoption through grid planning, managed charging, charging-infrastructure programs, and qualifying customer incentives.Programs differ by state and regulatory approval.

Solar Interconnection

Homeowners and businesses installing solar can work with Eversource on utility interconnection requirements.The process typically includes application review, technical approval, metering, inspection, and permission to operate.

Battery Storage

Eversource supports integration of battery-storage resources into the electric system.Battery programs can help improve system flexibility, reduce peak demand, provide resilience, and support renewable-energy integration.

Grid Modernization

The company invests in advanced meters, automation, system monitoring, substations, transmission facilities, and other technologies intended to improve reliability and support a more flexible electric grid.

Outage Reporting

Customers can report or check power outages through Eversource’s outage map, account tools, and territory-specific telephone numbers.The outage platform provides service-area status information for Connecticut, Eastern Massachusetts, Western Massachusetts, and New Hampshire.

Storm Restoration

Eversource coordinates crews, contractors, equipment, vegetation management, and emergency operations during storms and major outages.Storm response is a central operating function because the company’s New England territory experiences hurricanes, winter storms, nor’easters, and severe thunderstorms.

Billing and Account Management

Customers can manage bills, payments, service changes, paperless billing, usage history, payment arrangements, and other account functions through Eversource digital tools and Customer Service.

Payment Assistance

Eversource provides payment arrangements and assistance programs for qualifying customers experiencing financial difficulty.Programs and eligibility differ by state and operating utility.

Clean Energy Integration

Eversource invests in infrastructure designed to connect renewable generation, energy storage, EV charging, geothermal programs, and other clean-energy resources to New England’s energy system.

Eversource Energy Corporate Phone Numbers

Corporate Phone Number

800-286-5000.

Corporate Headquarters Number

800-286-5000

Headquarters Number

800-286-5000

Corporate Office Number

800-286-5000

Connecticut Customer Service Number

800-286-2000

Eastern Massachusetts Customer Service Number

800-592-2000.

Western Massachusetts Customer Service Number

877-659-6326.

New Hampshire Customer Service Number

800-662-7764

Customer Support Number

Use the applicable regional Customer Service number based on the service address.

Toll-Free Number

All four major regional consumer-service numbers listed above are toll-free.

Sales Number

Eversource does not operate a conventional consumer Sales Department.New electric or gas service and business-service inquiries are routed through the appropriate utility Customer Service channel.

Billing Number

Billing support uses the applicable regional Customer Service number.

For Western Massachusetts

877-659-6326

Regional Office Number

Major business offices include

Boston: 800-286-5000
Hartford: 800-286-5000
Springfield: 800-286-5000.

Branch Office Number

Eversource maintains numerous operational facilities but does not publish one universal local branch number.

International Number

Eversource operates within the United States and does not publish a general international Customer Service number.

Emergency / After-Hours Number

Electric outage and gas-emergency contacts vary by service area.Customers should use their region’s official Eversource emergency or outage channel. For an immediate life-threatening emergency, fire, or suspected dangerous condition, call 911.

Investor Relations Number

781-441-8862

Email

investorrelations@eversource.com.

Media / Press Number

Current corporate media contact

William Hinkle: 603-634-2228

Email

william.hinkle@eversource.com.

Human Resources Number

Eversource does not publish one universal applicant HR telephone number.

Careers

https://jobs.eversource.com/

Recruitment-fraud email

careers@eversource.com.

Shareholder Services Number

800-999-7269

This number is operated through Computershare for Eversource shareholders.

Reservations / Booking Number

Not applicable.

How to Reach a Real Person at Eversource Energy

The best number depends on the customer’s service territory. Connecticut customers should use 800-286-2000, Eastern Massachusetts customers 800-592-2000, Western Massachusetts customers 877-659-6326, and New Hampshire customers 800-662-7764. Have the account number, service address, account holder’s name, recent bill, and a description of the issue available before calling.

For a power outage, gas concern, damaged utility equipment, or other operational problem, use the appropriate service-area emergency or outage route rather than the corporate office. Corporate headquarters at 800-286-5000 is more appropriate for company-level, securities, legal, or administrative matters than routine residential billing.

Customers disputing a bill or payment arrangement should ask the first representative to review the account and, if necessary, request escalation to a supervisor or billing specialist. Keeping meter readings, bills, payment confirmations, service dates, and prior case numbers available can significantly improve the review process.

Eversource Energy Headquarters & Corporate Office Address

Current Headquarters

Eversource Energy
300 Cadwell Drive
Springfield, MA 01104
United States

Current 2026 SEC filings explicitly identify this location as Eversource Energy’s principal executive office.

Corporate Office

The Springfield location is the company’s principal executive office.

Other Important Address

Eversource also maintains major general business offices at

800 Boylston Street
Boston, MA 02199

and

56 Prospect Street
Hartford, CT 06103.

Former / Historical Headquarters

Eversource’s predecessor companies historically maintained headquarters and major offices across Hartford, Boston, Springfield, and Manchester.Current corporate filings should be used instead of older Northeast Utilities or NSTAR headquarters listings when identifying Eversource Energy’s principal executive office.

How to File a Complaint Against Eversource Energy

Complaints may involve electric or gas bills, meter readings, service quality, payment arrangements, outages, new connections, gas service, energy programs, tree work, property damage, solar interconnection, or Customer Service. Gather the account number, service address, disputed bills, meter information, photos, payment records, work orders, outage information, and previous case numbers before escalating.

Step 1: Contact Customer Service

Call the Customer Service number for the property: 800-286-2000 in Connecticut, 800-592-2000 in Eastern Massachusetts, 877-659-6326 in Western Massachusetts, or 800-662-7764 in New Hampshire. Explain the issue and request that the complaint be documented under the account. Keep the representative’s name and any case number provided.

Step 2: Contact the Relevant Department

Ask to be routed to the department responsible for the issue, such as billing, collections, metering, gas service, new service, solar interconnection, energy efficiency, vegetation management, or outage claims. Providing the exact department with supporting documents can prevent repeated transfers.

Step 3: Request Supervisor or Management Review

If the first team cannot resolve the complaint, request a supervisor or management review. Provide the previous case number, a concise timeline, and the resolution requested. For billing matters, identify each disputed bill, charge, meter reading, or payment.

Step 4: Use the Company’s Written Complaint Channel

Submit the issue through Eversource’s official online Customer Service or account-support channel, or send written correspondence to the applicable operating utility. Written complaints should include the account number, service address, contact information, facts, and supporting evidence.

Step 5: Contact Corporate Headquarters

For a serious unresolved company-level concern, write to Eversource Energy, 300 Cadwell Drive, Springfield, MA 01104. The headquarters should be used after ordinary utility Customer Service and management escalation have been attempted.

Step 6: Use the Specialized Complaint or Dispute Department

Ask Eversource to conduct a formal account or billing investigation when the matter involves a disputed balance, payment arrangement, meter issue, or service decision. Western Massachusetts customer-rights materials specifically explain that Eversource will investigate customer inquiries and provide the results.

Step 7: File With the Appropriate Regulator

Utility regulation is state-specific. Massachusetts complaints may be escalated to the Massachusetts Department of Public Utilities, Connecticut complaints to the Connecticut Public Utilities Regulatory Authority, and New Hampshire complaints to the appropriate state utility regulator. Eversource’s Massachusetts customer-rights material specifically gives DPU escalation information for unresolved disputes.

Step 8: Use Consumer Protection or Financial Dispute Options

Depending on the issue, customers may also seek assistance from a state Attorney General, consumer-affairs office, utility consumer advocate, or other state consumer-protection body. This can be appropriate when the complaint involves allegedly unfair collection practices, unauthorized charges, deceptive communications, or unresolved contractual concerns.

Step 9: Consider Formal Legal or Arbitration Procedures

If internal review and regulatory remedies do not resolve a substantial dispute, review the applicable tariff, state utility rules, service agreement, and legal remedies before proceeding. Formal administrative appeals, court proceedings, property-damage claims, or other legal action may be available depending on the facts. Utility disputes are highly regulated, so the correct procedure depends on the customer’s state and type of service.