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Municipal Investment Funds: How Cities Are Financing Clean Energy

The Municipal Investment Fund does not build anything. It pays for the predevelopment work that turns a municipal intention into something a lender will look at. Understanding that distinction is what separates a fundable application from a wish list.

Axonometric massing diorama of a city district in which four physically separate buildings on different blocks are tinted teal while all surrounding context buildings are ghosted white: a mixed-use apartment block, a civic library with a colonnade, a converted sawtooth-roof warehouse, and a school with a playfield
Four separate buildings on four separate blocks, treated as one portfolio. That is the structural idea the Municipal Investment Fund is built around, and it is why the coalition requirement is not administrative box-ticking. Illustration generated for this article.

Takeaways

  1. It is a predevelopment grant, not capital. The Municipal Investment Fund (MIF) explicitly supports public-private partnership plans and predevelopment activities, not direct capital deployment. Applications that read as construction funding requests are answering a different question.
  2. The award is $250,000 and the programme is $11.25 million across 49 communities selected in July 2025, spanning 46 states, Washington D.C., Puerto Rico and four Tribal nations. It is administered by ICLEI USA in partnership with CGC.
  3. Eligibility is bounded at both ends. Population between 10,000 and 750,000, with Tribes exempt from the population test, plus at least one census tract designated as a Low-Income and Disadvantaged Community.
  4. The coalition requirement is the substance of the programme. Applicants must demonstrate a coalition that can include community organisations, labour, businesses and utilities. This is a whole-community test, and it is what makes multi-site aggregation work.
  5. Applications are closed. The deadline was 5 March 2025 and ICLEI USA is not accepting additional applications. What remains useful is the structure, which is worth understanding before the next window or before approaching any similar predevelopment facility.

What the fund is, precisely

ICLEI, Local Governments for Sustainability USA, partnered with CGC to offer $11.25 million in market-building grants and technical support. Individual awards are $250,000. In July 2025 the partners announced the selection of 49 communities: local governments, Tribes and their partner not-for-profit organisations across 46 states, Washington D.C., Puerto Rico and four Tribal nations.

Eligibility carries four requirements worth reading carefully:

The money supports building the market for financeable qualified projects and improving the likelihood that projects reach financing. That phrasing is doing real work. The fund's theory is not that municipalities lack good projects. It is that municipalities lack the predevelopment work products that make a good project legible to capital.

Current status The application deadline closed 5 March 2025 and ICLEI USA states it is not accepting additional applications at this time. Nothing below is an invitation to apply. It is a description of a structure that recurs across predevelopment facilities, and a set of lessons that transfer.

Why $250,000 is the right size for the problem it solves

A quarter of a million dollars does not build a thermal energy network, a solar array or a retrofit programme. It comfortably covers the things that stand between a municipality and a term sheet.

Those things are usually some combination of: a technical feasibility study with defensible load and cost figures; a twenty year pro forma with more than one scenario; a legal analysis of ownership structures and their tax consequences; an assessment of which incentives the entity can actually capture given its tax status; a governance agreement between the participating institutions; and enough community engagement to demonstrate that the customer base exists.

None of those is glamorous. All of them are things a lender or a bond counsel will ask for, and a municipality that has not done them cannot proceed regardless of how good the underlying project is. Predevelopment funding exists because this stage is simultaneously essential, unfinanceable by conventional means, and too expensive for a small city's general fund.

The coalition requirement is the mechanism, not the paperwork

It is tempting to read the coalition requirement as an equity condition attached to a technical programme. It is better read as the financing mechanism itself.

Consider what a single municipal building offers a project. One roof, one load profile, one owner, one decision-maker, one credit. The transaction costs of structuring, diligencing and closing a financing are close to fixed regardless of deal size, which means a single-building project carries those costs against a small base. Many small clean energy projects fail not on their economics but on their transaction costs.

Now aggregate. Several buildings under several owners across a city, structured as one portfolio, share one set of transaction costs. More than that, they diversify. A school, a hospital, a municipal office and a mixed-use residential block have different load shapes, different occupancy patterns, different seasonal peaks and different credit profiles. Combined, the portfolio's aggregate peak is lower than the sum of the individual peaks, and its revenue is less correlated to any single tenant.

That is the same diversification argument that makes a shared borefield cheaper per building than individual wells, and it applies to the capital stack for exactly the same reason.

Minimalist wireframe aerial illustration of a city where five widely scattered buildings are picked out in pale sage, cyan and indigo tints, each with a coloured map pin and glow halo, connected by thin arcing lines, while the surrounding city remains uniform white wireframe
The portfolio view. Five assets, five neighbourhoods, five owners, one financing. The arcs are the only thing that makes it a deal rather than five conversations. Illustration generated for this article.

Where transaction cost goes when sites are aggregated

Schematic. Illustrates why portfolio structuring changes deal viability, using no project-specific figures.
Five separate financings Transaction cost × 5 Project cost One aggregated portfolio Transaction cost × 1 Same five sites Same physical projects. The difference is how many times the closing costs are paid, and whether the peaks diversify.
Schematic prepared for this article to illustrate the structural argument. No figures are plotted and none should be read from the proportions.

What a multi-site application has to answer that a single-site one does not

Aggregation buys efficiency and imposes complexity. A coalition application has to close four questions a single-building application never faces.

Who owns the asset

Direct municipal ownership, a special purpose utility district, a public-private partnership and a cooperative each carry different consequences for tax credit capture, procurement rules, prevailing wage exposure and rate-setting authority. A municipality that cannot use a tax credit directly may capture far more value through a structure that brings in a partner who can, and that trade has to be quantified rather than assumed.

Who pays if a participant leaves

A portfolio's diversification benefit becomes a concentration risk the moment its anchor withdraws. The governance agreement between participating institutions is not boilerplate; it is the thing that determines whether the portfolio survives one participant changing its mind.

What binds the participants before financing closes

Letters of intent, subscription agreements or memoranda of understanding are the evidence that the coalition is real. They are also, in our experience across municipal geothermal work, the item most often outstanding at application time and the one that most often determines schedule.

Whether the equity condition is met by geography or by design

Programmes of this type require a designated Low-Income and Disadvantaged Community census tract. Meeting that geographically is necessary. Demonstrating that the benefits actually reach households in that tract, through bill savings, hiring or ownership, is what makes the application persuasive rather than merely eligible.

The transferable structure

The specific Municipal Investment Fund window is closed, but the shape recurs. Predevelopment facilities generally share three features: a modest award relative to the eventual project, a requirement to demonstrate partnership rather than sole capability, and a deliverable that is a plan rather than a building.

A municipality that wants to be ready for the next such window can do three things now, none of which requires a grant.

Related work Gaiergy's multi-site coalition experience includes thermal energy network work in Baltimore, Maryland, covering ownership structure and public-private partnership planning across several sites. The same aggregation logic underpins the community-scale approach described in our note on community geothermal planning grants.

Sources

All URLs accessed 12 August 2026.

  1. ICLEI USA, Municipal Investment Fund programme page. Source for the $11.25 million total, the $250,000 individual award, the 49 selected communities across 46 states, Washington D.C., Puerto Rico and four Tribal nations, the July 2025 selection date, the 10,000 to 750,000 population range with Tribes exempt, the Low-Income and Disadvantaged Community census tract requirement, the coalition and whole community requirement, the Unique Entity Identifier and System for Award Management registration requirement, the predevelopment rather than capital deployment purpose, and the closed application status with a 5 March 2025 deadline. icleiusa.org/iclei-cgc
  2. Gaiergy Corp, Baltimore thermal energy network public-private partnership planning files, prepared in support of multi-site coalition work. Source for the ownership structure and coalition governance observations. Client project documents, not public URLs.
  3. City of Vandalia, Illinois, completed Illinois Finance Authority CPRG Attachment A application prepared with Gaiergy Corp, February 2026. Source for the observation on ownership structure options and the frequency with which letters of intent are outstanding at application time. Gaiergy project file: IFA_CPRG_ATTACHMENT-A_Completed.docx.
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