Elizabeth P. Hanigan
As the leader of the energy and project development practice, Elizabeth P. Hanigan focuses her practice on business and financial matters concerning renewable energy and infrastructure development, project finance, mergers and acquisitions, and joint ventures. She advises developers, private equity, and financial investors in connection with the acquisition, construction, development, sale, and financing of renewable energy generation projects, with an emphasis on wind, solar, and energy storage facilities. Elizabeth also advises clients working toward their sustainability goals—for example, in connection with negotiation of virtual power purchase agreements and other investments in clean energy technologies.
Clients seek her advice in navigating the legal issues associated with the negotiation of purchase and sale agreements, build-transfer agreements, project financing agreements, including tax equity documentation, development agreements, power purchase agreements, engineering, procurement, and construction (EPC) contracts, equipment supply and warranty contracts, operations and maintenance (O&M) agreements, and other commercial contracts.
Elizabeth has been recognized as a Leading Lawyer by The Legal 500 for her work in renewable and alternative energy from 2020 through 2025. She has also been ranked in Projects: Power & Renewables: Transactional by Chambers USA since 2020 and by Chambers Global since 2022.
- A renewable energy developer in connection with the development and sale of two wind farms located in Pennsylvania and New Hampshire
- A utility affiliate in connection with acquisition of a portfolio of solar projects in Texas
- A developer in connection with the sale of a portfolio of solar development projects in Maine
- A corporate technology company in connection with the acquisition of renewable energy through multiple virtual power purchase agreements
- A developer in connection with build-own-transfer agreements for 199-megawatt, 287-megawatt and 999-megawatt wind projects in Oklahoma, each of which will be sold to a utility upon completion
- A major retail company in connection with the acquisition of renewable energy through multiple virtual power purchase agreements
- A developer in connection with the sale of a renewable energy development pipeline
- A developer in connection with the negotiation of a power purchase agreement and related design/build/transfer arrangements in connection with the expansion of a wind energy project located in North Dakota
- A developer in connection with the acquisition of a battery storage facility, including negotiation of the related construction, supply and warranty contracts
- A developer in connection with the sale of a portfolio of renewable energy operating assets
- A private equity fund in connection with the acquisition and tax equity financing of a 100 MW solar project in California
- A developer in connection with the acquisition, development and subsequent sale of a wind energy project located in North Dakota
- A corporate entity in connection with negotiation of a power purchase agreement
- A US subsidiary of Akuo Energy in connection with the tax equity and back leverage financing of a 30 MW wind farm located in New Mexico
- Exelon Wind in connection with its acquisition and development of wind energy projects in Texas, Michigan, Idaho, Maryland, Oklahoma, and New Mexico
- Citicorp Capital Markets, Municipal Securities Division, in its equity investment into wind projects in Idaho and California and a solar project in Indiana
- Marquette University, 2002, J.D.
- Indiana University, 1994, B.A.
- Illinois
- Wisconsin


Lawyer of the Year, Energy Law, Chicago, The Best Lawyers in America (2023)
Listed, The Best Lawyers in America, Energy Law, Chicago (2021–2026)
Ranked, Projects: Power & Renewables: Transactional, USA, Chambers Global (2025)
Band 1, Projects: Power & Renewables: Transactional, USA, Chambers Global (2022, 2023)
Ranked, Projects: Power & Renewables: Transactional, Nationwide, Chambers USA (2023–2025)
Band 1, Projects: Power & Renewables: Transactional, Nationwide, Chambers USA (2020–2022)
Leading Lawyer, Energy: renewable/alternative power, The Legal 500 US (2020–2025)
Recommended, Energy: renewable/alternative power, The Legal 500 US (2025)
Recommended, Energy litigation: electric power, The Legal 500 US (2025)
Recommended, Energy litigation: oil and gas, The Legal 500 US (2025)
Recommended, Energy regulation: electric power, The Legal 500 US (2023–2025)
Recommended, Energy regulation: oil and gas, The Legal 500 US (2023–2025)
Recommended, Energy transactions: electric power, The Legal 500 US (2025)
Recommended, Energy transactions: oil and gas, The Legal 500 US (2023, 2024)
Recommended, Finance: Project finance, The Legal 500 US (2021, 2024, 2025)
Recommended, Energy transactions: conventional power, The Legal 500 US (2021)
Recommended, Project Finance, The Legal 500 US (2014)
Recommended, Transport: Rail and road: litigation and regulation, The Legal 500 US (2025)
Member, Law Firm of the Year, Energy/Projects: Power (including Renewables), Chambers USA (2018)
Member, Practice Group of the Year, Energy, Law360 (2016)
Member, Energy Law Firm of the Year, US News & World Report/Best Lawyers (2015)
Recognized, Acritas Star Lawyer (2017)
Member, American Bar Association
Member, Energy Bar Association
