Why It Matters
Connecticut’s new solar tax framework removes uncertainty for commercial solar developers while guaranteeing municipalities stable annual revenue from ground-mounted arrays, resolving years of disputes over property valuations and assessments that have strained town budgets and prompted litigation.
What Happened
Connecticut lawmakers enacted a uniform tax calculation for large commercial solar facilities as part of an omnibus energy bill during the 2025 legislative session. The measure, authored by State Rep. Jamie Foster, D-Ellington, establishes a fixed annual property tax of $10,000 per megawatt of generating capacity for ground-mounted solar arrays exceeding 1 megawatt in output. The law takes effect July 1, 2026.
The framework applies exclusively to commercial installations. Residential rooftop solar systems, typically ranging from 5 to 10 kilowatts, remain exempt from property taxation. Under the previous system, solar developers could claim broad exemptions from local property taxes, while municipalities struggled with rapid depreciation of panel values that created budgetary gaps. The new structure eliminates those exemptions for large facilities and provides predictable tax obligations.
Foster’s Ellington district, located in the Connecticut River Valley, contains several of the state’s largest solar arrays. The legislator emphasized the practical benefits of standardization: “when taxes are easier to calculate, it’s simpler for developers to project future costs and secure financing for their projects.”
By the Numbers
$10,000 — annual tax per megawatt of solar capacity
$60,000 — annual tax bill for a 6-megawatt facility under the new framework
1 megawatt — the capacity threshold above which the tax applies
5–10 kilowatts — typical size of residential rooftop systems, which remain exempt
July 1, 2026 — effective date for new solar facilities commencing operation
Zoom Out
Property tax treatment of renewable energy installations has emerged as a flashpoint across states attempting to balance incentives for clean energy development with municipal fiscal stability. Connecticut’s approach—replacing depreciation-based assessments with a flat per-megawatt fee—mirrors strategies adopted by other states seeking to end protracted negotiations and litigation over solar valuations. Landfill solar arrays are beginning operation in Connecticut as the state pursues broader renewable capacity targets. The resolution also reflects growing sophistication in state energy policy as solar deployment scales beyond early-adopter phases.
What’s Next
Developers and municipal leaders have worked to negotiate tax-payment arrangements in advance of the July 2026 deadline. The uniform calculation is expected to streamline future project approvals and reduce administrative burden for both towns and commercial solar operators planning facilities under the new framework.