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Enacted in 2021, Local Law 154 (LL154) — also known as the All-Electric Law — prohibits on-site combustion of fossil fuels that emit more than 25 kg CO₂/MMBtu in new construction. In practical terms, this means no gas boilers, no gas stoves, and no fuel-oil heating in new NYC buildings.
The law is a cornerstone of NYC's broader decarbonization strategy. Buildings account for nearly 70% of the city's carbon emissions, and LL154 directly targets that source by mandating all-electric systems — heat pumps for space heating and cooling, electric hot water systems, induction cooking, and electric dryers.
For developers, architects, and building owners, LL154 compliance requires careful planning from the earliest design phases. Retrofitting an already-approved design for electrification is expensive. Proactive compliance, guided by experts, is dramatically more cost-effective.
• Applies to New Building (NB) and Alt-CO New Building applications filed on or after each phase deadline
• Covers space heating, service hot water, cooking ranges, and clothes dryers
• Non-compliant applications will not receive DOB approval or permit issuance
• Works alongside Local Law 97 (LL97) for a comprehensive net-zero strategy
of NYC's carbon emissions come from buildings
Final phase deadline for all new construction
Compliance phases phased in from 2024–2027
Years of NYC energy compliance expertise at Cotocon
A structured, transparent approach that eliminates guesswork and keeps your project on schedule.
We review your project details, filing date, building type, and occupancy use to map your exact LL154 obligations and exceptions.
Our engineers develop a full all-electric systems strategy — heat pumps, hot water, envelope, ventilation, and controls — tailored to your site and budget.
We produce DOB-ready construction documents that fully satisfy LL154 combustion limits and integrate with LL97 carbon targets.
Post-construction, we test, balance, and commission all systems to ensure real-world performance matches design — and set up ongoing energy monitoring.
Founded in 2009, we've spent 15+ years decarbonizing New York's built environment.
In 2024 alone, we helped the owners and managers of more than 5,000 NYC buildings reduce energy consumption, file compliance requirements on time, and save money.
Our team includes architects, engineers, and planners with decades of NYC building experience. We know LL154, LL97, LL87, LL84, and LL88 — and how they interact.
Our proprietary Carbon Shield platform gives building owners real-time visibility into emissions, compliance deadlines, and violations — all in one centralized dashboard.
Proper energy engineering is a science. We use thermal load calculations, energy modeling, and performance testing — not rule-of-thumb assumptions — to design systems that actually work.
Federal tax credits (IRA), NYSERDA programs, and ConEd incentives can substantially offset electrification costs. We identify and help you capture every available dollar.
From pre-design consultation through DOB approval, construction, commissioning, and ongoing monitoring, Cotocon is your single accountable partner for the full project lifecycle.
