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City pilots triple‑bottom‑line tool, insulation installs and LED streetlight retrofit; ULI net‑zero work announced

Sustainability Advisory Committee (Metro Nashville) · November 12, 2025
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Summary

Committee members heard updates on an implementation toolkit (triple bottom line), a housing insulation pilot (40 homes completed, 30 scheduled), LED streetlight retrofits at 67% completion and selection to participate in ULI’s net‑zero effort for affordable housing policy case studies.

The Sustainability Advisory Committee received several implementation updates ranging from project-level pilots to decision-support tools.

Triple bottom line tool: Kendra introduced a decision-support tool developed with Wilmot to quantify environmental, social and economic impacts for capital projects; Wilmot’s representative described categories (energy, water, waste, stormwater/tree planting) and said the tool converts multiple impacts into dollar values to compare across projects. "It puts everything in a dollar value," the Wilmot consultant said.

Energy-efficiency pilots: Kendra said the Insulation for Impact pilot (partnering with Nashville Electric Service, TVA and local partners) has completed installations in 40 low-income older-adult homes and has 30 additional installs scheduled; staff are measuring impacts and considering reinvestment of leftover budget.

LED retrofit: The city’s LED streetlight retrofit is 67% complete and running ahead of schedule, Kendra said, with an anticipated completion in 12–16 months and measured energy savings already recorded.

ULI net‑zero participation: Staff said Nashville was selected to participate in ULI’s Net Zero Imperative with ULI Nashville and Think Tennessee to develop case studies and guidance to help affordable housing developers build to net-zero or more sustainable standards.

Why it matters: The tools and pilots aim to give departments clearer cost‑benefit information and practical examples for accelerating energy and resilience investments; the committee asked for clarity on tool categories and how the tool could be adopted consistently across departments.

Next steps: The triple bottom line tool will be socialized with project managers and presented to director-level staff; staff will continue measuring pilot outcomes and report back to the committee.