'%3e%3cpath%20d='M41.90,14.92%20L44.15,2.36%20L55.85,2.36%20L58.10,14.92%20A36%2036%200%200%201%2069.08,19.47%20L79.55,12.18%20L87.82,20.45%20L80.53,30.92%20A36%2036%200%200%201%2085.08,41.90%20L97.64,44.15%20L97.64,55.85%20L85.08,58.10%20A36%2036%200%200%201%2080.53,69.08%20L87.82,79.55%20L79.55,87.82%20L69.08,80.53%20A36%2036%200%200%201%2058.10,85.08%20L55.85,97.64%20L44.15,97.64%20L41.90,85.08%20A36%2036%200%200%201%2030.92,80.53%20L20.45,87.82%20L12.18,79.55%20L19.47,69.08%20A36%2036%200%200%201%2014.92,58.10%20L2.36,55.85%20L2.36,44.15%20L14.92,41.90%20A36%2036%200%200%201%2019.47,30.92%20L12.18,20.45%20L20.45,12.18%20L30.92,19.47%20A36%2036%200%200%201%2041.90,14.92%20Z'%20fill='url(%23cpGear)'%3e%3c/path%3e%3ccircle%20cx='50'%20cy='50'%20r='28'%20fill='none'%20stroke='%23012f00'%20stroke-width='3'%3e%3c/circle%3e%3cpath%20d='M43.50,37.50%20L45.50,35.50%20L54.50,35.50%20L56.50,37.50%20L56.50,43.50%20L62.50,43.50%20L64.50,45.50%20L64.50,54.50%20L62.50,56.50%20L56.50,56.50%20L56.50,62.50%20L54.50,64.50%20L45.50,64.50%20L43.50,62.50%20L43.50,56.50%20L37.50,56.50%20L35.50,54.50%20L35.50,45.50%20L37.50,43.50%20L43.50,43.50%20Z'%20fill='url(%23cpGold)'%20stroke='%23bf5d00'%20stroke-width='0.4'%20stroke-linejoin='miter'%3e%3c/path%3e%3c/g%3e%3c/svg%3e){kind=small}
Local Law 87 Retro-Commissioning for NYC Commercial Buildings
If your building is over 50,000 square feet, NYC Local Law 87 requires a periodic energy audit and retro-commissioning of your base building systems, filed in an Energy Efficiency Report. Com+ Mechanical handles the HVAC side, so you meet your deadline and avoid escalating DOB penalties.
Compliance Risks & What's at Stake
Missed or late EER filing
Failing to file your Energy Efficiency Report by the deadline in your due year can result in a Department of Buildings violation and monetary penalties that escalate for each additional year of non-compliance.
Incomplete or rejected report
An EER missing required retro-commissioning findings or proper certification can be deemed incomplete by DOB, leaving you out of compliance and exposed to penalties even though you started the process.
Using an unqualified retro-commissioning agent
Local Law 87 requires the RCx work to be led by a qualified agent (such as a registered design professional or other specified licensed operating engineer) with commissioning credentials. Work performed outside those qualifications may not satisfy the law.
Deficiencies found but never corrected
Retro-commissioning is not just an inspection — the law centers on identifying AND correcting deficiencies in base building systems. Documenting problems without remediating the required items undermines the filing.
Overlap with other NYC energy mandates
LL87 sits alongside benchmarking (Local Law 84) and emissions-cap (Local Law 97) obligations. Ignoring the efficiency findings from your RCx can leave you worse positioned for Local Law 97 emissions limits and any associated penalties down the line.
Last-minute scramble before the deadline
Audits, field testing, corrections, and certification take time. Starting late risks blowing the December 31 filing date for your due year and forcing rushed, incomplete work.
What Local Law 87 Requires — and Why HVAC Is at the Center
NYC Local Law 87, part of the city's Greener, Greater Buildings Plan, requires owners of larger buildings to periodically audit and retro-commission their base building systems and document the results in an Energy Efficiency Report (EER) filed with the Department of Buildings. It generally applies to buildings over 50,000 gross square feet, as well as tax lots and condominium developments with multiple buildings exceeding. Compliance runs on a recurring cycle of, and the year your building is due is determined by the last digit of its tax block number. Retro-commissioning (RCx) is the process of tuning your existing systems back to efficient operation — identifying and correcting deficiencies through repairs, cleaning, recalibrating sensors and controls, and correcting setpoints and operating schedules. Because heating, ventilation, air conditioning, and their controls are typically the largest energy consumers in a commercial building, HVAC is where most retro-commissioning findings and corrections live. The EER itself must be filed by a registered design professional, and the retro-commissioning must be led by a qualified RCx agent. Com+ Mechanical performs the hands-on HVAC assessment, corrections, and documentation that make your filing accurate and defensible.
How Com+ Helps You Comply
Why Building Owners Choose Com+ for LL87
Our Simple Process
From call to comfort in 4 easy steps
Assess
We confirm your building's applicability and due year, then survey and functionally test your HVAC and controls to identify deficiencies and energy-efficiency opportunities across the base building systems.
Plan
We deliver a prioritized scope of retro-commissioning corrections and any recommended capital upgrades, coordinated with your registered design professional or RCx agent and mapped to your filing deadline.
Implement
Our technicians execute the corrections — repairs, cleaning, control recalibration, setpoint and schedule fixes, and approved equipment upgrades — and verify the systems are performing as intended.
Document
We compile a complete HVAC findings-and-corrections package with measured results, formatted to support the Energy Efficiency Report your certifying professional files with DOB.
Types of Systems We Install
Building Automation & Controls Optimization
The most common source of retro-commissioning savings. We recalibrate sensors, correct setpoints, fix occupied/unoccupied schedules, and tune control sequences so HVAC equipment runs only when and as hard as it needs to.
- •Sensor calibration and verification
- •Setpoint and schedule correction
- •Control sequence and economizer tuning
- •Trend logging to verify performance
High-Efficiency HVAC Equipment Upgrades
When assessment shows aging or oversized equipment is driving energy waste, targeted replacements deliver lasting efficiency gains that support both LL87 findings and Local Law 97 emissions goals.
- •High-efficiency boilers, chillers, and rooftop units
- •Variable frequency drives on pumps and fans
- •Right-sizing to actual building loads
- •Improved part-load performance
Ventilation & Heat Recovery Measures
Correcting outdoor-air control and capturing waste heat reduces the energy needed to condition fresh air — a frequent retro-commissioning correction in commercial buildings.
- •Economizer repair and recalibration
- •Demand-controlled ventilation
- •Energy/heat recovery ventilation
- •Airflow balancing and damper repair
Why Com+ Mechanical
Commercial HVAC focus
We work exclusively on commercial and institutional mechanical systems across the NYC metro — the exact equipment LL87 retro-commissioning targets.
Compliance-driven documentation
We document HVAC findings, corrections, and verified results in a format built to support your EER and stand up to DOB review.
Partner-friendly coordination
We work alongside your engineer, RCx agent, and property management team so certification and filing go smoothly.
Deadline accountability
We schedule around your tax-block due year so the HVAC corrections are finished with time to spare before the December 31 filing date.
Transparent Pricing
No fees. No surprises. Just honest service.
Compliance Assessment
The starting point: we evaluate your HVAC base building systems, confirm your due year, and identify the retro-commissioning corrections and audit findings you'll need.
- Applicability and due-year confirmation
- HVAC and controls survey with functional spot-testing
- Deficiency and energy-efficiency opportunity list
- Prioritized corrective-action scope
- Coordination notes for your RCx agent / PE
Upgrades & Retrofits
Execution of the retro-commissioning corrections and any capital HVAC upgrades identified in the assessment.
- RCx corrections: repairs, cleaning, recalibration
- Control sequence, setpoint, and schedule tuning
- High-efficiency equipment and VFD upgrades as needed
- Post-correction functional verification
- Findings-and-results documentation for the EER
Ongoing Compliance & Maintenance
Keep systems tuned and documented through the full compliance cycle so your next filing is straightforward.
- Scheduled preventive maintenance of base building HVAC
- Periodic controls and setpoint re-verification
- Performance tracking to hold efficiency gains
- Readiness support for your next LL87 cycle
- Alignment with Local Law 97 emissions planning
Pricing is scoped after the Compliance Assessment, based on building size, system type, and the corrections required. Filing fees and any DOB extension or amendment fees are set by the city and billed separately.
Own a Commercial Property?
Business+ plans start at $499/year — includes 2 rtu tune-ups, 10% off all services, and priority scheduling.
Equipment & Brands We Service
Factory-trained technicians for all major HVAC manufacturers
%20--%3e%3csvg%20version='1.1'%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:xlink='http://www.w3.org/1999/xlink'%20x='0px'%20y='0px'%20viewBox='0%200%20150%2050'%20style='enable-background:new%200%200%20150%2050;'%20xml:space='preserve'%3e%3cg%3e%3cpath%20style='fill:%23C9202F;'%20d='M124.447,44.322c-23.807,5.229-55.19-0.102-55.19-0.102s73.175,3.979,71.344-20.254%20C138.687-1.368,35.312,8.163,35.312,8.163c60.192-10.521,91.646-0.564,93.939-0.144c11.942,3.18,19.694,9.036,20.404,15.459%20C151.563,35.271,135.269,41.943,124.447,44.322z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M83.171,38.6c-2.416,0-4.058-0.553-4.927-1.656s-1.022-2.773-0.301-5.027l4.168-12.728%20c0.861-2.684,1.97-4.478,3.324-5.382c1.353-0.904,3.469-1.357,6.35-1.357h2.956c2.877,0,4.145,0.301,5.231,1.535%20c0.934,1.06,0.972,2.521,0.108,5.205l-4.149,12.718c-0.723,2.254-1.507,4.117-3.085,5.223S88.903,38.6,86.488,38.6L83.171,38.6z%20M96.602,18.799c0.302-1.029,0.558-1.979,0.113-2.657c-0.327-0.502-0.804-0.66-1.711-0.731c-0.829-0.117-2.286-0.062-2.286-0.062%20c-1.258,0.037-2.021,0.267-2.65,0.772c-0.629,0.506-0.955,1.038-1.479,2.669L84.19,32.285c-0.406,1.26-0.455,2.143-0.151,2.65%20c0.302,0.506,1.244,0.822,2.747,0.822c1.418-0.004,2.752-0.059,3.935-0.955c0.682-0.43,1.019-1.258,1.459-2.508L96.602,18.799z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M14.834,38.18c0,0-14.646,0.014-14.643,0.002l8.314-25.357h6.201c0,0-7.508,22.517-7.448,22.517%20h8.521L14.834,38.18z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M39.008,15.701c-0.006,0,0.945-2.86,0.945-2.86H25.417c-0.002,0-0.005,0-0.005,0l-8.31,25.339H31.61%20l0.951-2.838c0,0-7.745,0-8.385,0c-0.027,0,1.516-4.672,3.201-9.758c3.337,0,7.298,0,7.294,0c-0.008,0,0.938-2.859,0.938-2.859%20s-3.821,0-7.282-0.001c0.876-2.64,1.72-5.18,2.333-7.023C34.597,15.701,39.013,15.701,39.008,15.701z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M77.25,12.821l-5.508,16.97l-2.311-16.967l-6.073,0.003l-8.253,25.356h6.074l5.537-16.979%20c0,0,2.265,16.725,2.305,16.971l-0.002,0.006l3.525,0.002l8.242-25.363L77.25,12.821L77.25,12.821z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M121.157,12.821h-4.427l-5.274,6.652l-1.309-6.652l-6.496,0.007l2.393,11.52l-10.54,13.836h4.357%20l7.112-9.356l1.94,9.352l6.226,0.002l-2.777-14.11L121.157,12.821z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M56.332,12.822l-5.511,16.971l-2.308-16.965l-6.075,0.003l-8.252,25.357h6.074l5.535-16.981%20c0,0,2.268,16.739,2.305,16.97l-0.002,0.012h3.527l8.241-25.365h-3.534L56.332,12.822z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M138.687,44.271c0,1.305-1.07,2.375-2.376,2.375c-1.305,0-2.373-1.07-2.373-2.375%20s1.068-2.373,2.373-2.373S138.687,42.967,138.687,44.271z%20M134.331,44.271c0,1.076,0.903,1.975,1.979,1.982%20c1.075-0.008,1.981-0.906,1.981-1.982c0-1.074-0.906-1.98-1.981-1.98C135.234,42.291,134.331,43.197,134.331,44.271z%20M135.688,42.98h1.022c0.559,0,0.768,0.295,0.768,0.57c0,0.533-0.334,0.695-0.616,0.834l0.42,1.08l-0.681,0.092l-0.317-1.041%20h-0.288l-0.211,1.004h-0.621L135.688,42.98z%20M136.095,44.135h0.223c0.321,0,0.524-0.189,0.524-0.48%20c0-0.156-0.124-0.295-0.327-0.295h-0.262L136.095,44.135z'/%3e%3c/g%3e%3c/svg%3e)
Don't see your brand? We service all major manufacturers! Call us to confirm.
Proudly Serving Nassau County
Fast, reliable service in your neighborhood
Frequently Asked Questions
Get answers to common questions about our services
Does Local Law 87 apply to my building?
It generally applies to buildings over 50,000 gross square feet, along with multi-building tax lots and condominium developments above a higher combined threshold. We confirm applicability based on Department of Finance records during the assessment.
How often do I have to comply, and how do I know my year?
Compliance recurs on a fixed cycle, and the year your building is due is determined by the last digit of its tax block number. Reports are due by December 31 of that year.
What is retro-commissioning, exactly?
Retro-commissioning is a systematic process of tuning your existing base building systems back to efficient operation — identifying and correcting deficiencies through repairs, cleaning, recalibrating sensors and controls, and correcting setpoints and operating schedules. It is paired with an energy audit (commonly an ASHRAE Level II audit).
Can Com+ file my Energy Efficiency Report?
The EER must be certified and filed by a registered design professional, and the retro-commissioning must be led by a qualified RCx agent as defined by the law. Com+ performs the HVAC assessment, corrections, and documentation, and coordinates with your certifying professional.
What happens if I miss the deadline?
Failing to file on time, or filing an incomplete report, can result in a Department of Buildings violation and monetary penalties that escalate for each additional year of non-compliance. We schedule work so the HVAC corrections finish before your deadline.
How does LL87 relate to Local Law 97?
They are separate but complementary. LL87 focuses on auditing and tuning your systems for efficiency; Local Law 97 sets carbon-emissions limits with penalties for exceeding them. The efficiency improvements found during retro-commissioning often help reduce emissions and improve your Local Law 97 position.
Love Our Service? Share Your Experience!
Manage a building we've serviced? A quick review helps other NYC property managers and building owners find us.
5 stars • 500+ reviews
Most Requested Services
Our businesses' top picks for heating, cooling & air quality
Explore Commercial HVAC Resources
Equipment services, industry expertise, NYC compliance, and the metro areas we cover.
Equipment, Repair & Maintenance
Industries We Serve
NYC Compliance & Energy Law
Service Areas
Don't Wait Until Your Filing Year Closes
Retro-commissioning audits, corrections, and certification take time — and the deadline is fixed by your tax block. Start with a Com+ Compliance Assessment now, and walk into your due year with the HVAC work done and your documentation ready. Call (332) 600-4640 to schedule.
Schedule Your Compliance Assessment