Commercial Property Assessed Clean Energy (C-PACE) financing is giving building owners a way to pay for efficiency, electrification and resilience work without pulling the full cost from a capital budget that may be frozen. A tool that began as a niche sustainability program has become an ordinary part of commercial real estate finance, and that matters to any facilities team holding a retrofit that pencils out but cannot win an allocation this year.
C-PACE lets owners of eligible commercial property finance qualified improvements with private capital, repaid through a voluntary assessment collected with the property tax bill. The U.S. Environmental Protection Agency (EPA) says the structure can cover 100% of the upfront cost of an energy or resilience upgrade, spreading repayment over enough years to keep annual payments low. The assessment generally stays with the property when it is sold, as long as the buyer agrees to take it on.
C-PACE Volume Rose 63% in 2025 to $3.6 Billion
The market grew quickly last year. Bayview PACE, a C-PACE lender with a direct stake in that growth, reported in March that national volume rose from $2.2 billion in 2024 to $3.6 billion in 2025, a 63% increase. Average loan size nearly doubled over the same period, from $19 million to $39 million.
Individual deals have grown too. In January, Nuveen Green Capital announced a $465 million C-PACE financing for The Geneva, an office-to-residential conversion in Washington, D.C., which it called the largest on record. The previous high mark, also a Nuveen deal, was $290 million for the Pendry Hotel & Residences in Tampa. In August, Nuveen said the first close of its fourth C-PACE lending fund topped $1 billion, bringing commitments across the fund series to $3 billion since 2023, with insurance companies among the leading investors.
C-PACE's expansion into new construction, refinancing and larger capital stacks has broadened how the financing is used without necessarily reducing its connection to building performance. Nuveen Green Capital CEO and CIO Alexandra Cooley told Commercial Observer that energy-efficiency and resilience measures represented less than 50% of the firm's financings in 2015 and more than 95% in 2026.
An Assessment Takes Retrofits Out of the Annual Capital Contest
Picture a $5 million mechanical upgrade going through a normal budget cycle. It competes with acquisitions, tenant improvements and structural repairs for the same pool of money, and in a year when growth spending is frozen it often loses. C-PACE moves that project into a separate financing channel, with repayment stretched across something close to the equipment's useful life. When projected operating savings cover the assessment, the retrofit no longer has to beat other uses of cash on day one, which eases the usual contest between decarbonization spending and shareholder returns.
Transferability addresses a second objection. Owners often pass on long-payback upgrades because they may not hold the building long enough to collect the savings. When the obligation can move with the property, the investment horizon follows the asset instead of the current owner's exit plan. That helps most where projects already have to clear overlapping hurdles on power, water, permits and capital before work can start.
Mortgage Lenders and Local Program Rules Set the Limits
None of this makes C-PACE free money. Because repayment rides on a property tax assessment, the obligation sits ahead of a mortgage in priority, and EPA notes that this senior position has drawn objections from mortgage lenders. Existing lenders generally have to consent before a commercial assessment is placed. Eligibility, terms and allowable improvements also vary by state and local program, and owners still need to test projected savings against the assessment payments before signing.
Policy is adding demand at the same time. Building performance standards such as New York City's Local Law 97, which tightens emissions limits in 2030, are pushing owners toward large electrification projects in the same years that capital budgets are tight, turning compliance into a balance sheet question. New York's Legislature passed a bill in June that would expand C-PACE eligibility to water, resiliency and low-carbon-intensity building components, and the New York League of Conservation Voters urged Gov. Kathy Hochul to sign it.
Facilities teams have traditionally built the technical case for a retrofit and handed it to finance to decide whether it clears the hurdle rate. C-PACE splits that into two questions, whether the building needs the work and whether this year's capital budget has to fund all of it. For a team sitting on an approved design and a frozen budget, the first useful call may be to the property's mortgage lender, not the capital committee.
