New York is the most complex solar permit landscape in the United States. Between New York City's independent construction code and Department of Buildings (DOB) permit system, the New York State Unified Solar Permit (NYS USP) for jurisdictions outside NYC, six major utilities with different interconnection processes, the NY-Sun incentive program, VDER tariff structures, historic district reviews, and Local Laws 92 and 94 mandating solar on new construction — every solar project in New York touches multiple regulatory systems.
This guide walks through the two parallel permit systems, the six utilities, the top AHJs, and the specific patterns that determine whether a New York solar plan set gets approved efficiently or gets caught in extended review cycles.
New York solar at a glance
New York State is one of the largest US solar markets, driven by aggressive state clean energy targets, substantial NY-Sun incentive investment, and mature residential and commercial installer ecosystems. But New York is not one solar market — it is functionally two:
- New York City (5 boroughs plus Westchester County): ConEd territory, NYC DOB permit system, PE/RA stamping required, LPC review in historic districts, LL92/94 solar-or-green-roof mandate on new construction
- Rest of New York State: NYS Unified Solar Permit format available for residential, five other utilities depending on region, standard state building and electrical codes
Understanding which of these two systems your project falls under is the first step in every NY solar design.
New York City permit system (NYC DOB)
New York City's five boroughs (Manhattan, Brooklyn, Queens, the Bronx, and Staten Island) operate under NYC's own construction codes, enforced by the NYC Department of Buildings (DOB).
Filing requirements
Solar projects in NYC generally require:
- A Construction Permit (structural, roof loading, attachment)
- An Electrical Permit (electrical design, filed by a Licensed Master Electrician)
- PE or Registered Architect (RA) stamping on the plan set
- Filing through the DOB NOW: Build online portal
Additional NYC layers
- Landmarks Preservation Commission (LPC): buildings in designated historic districts or individually landmarked buildings require LPC review before solar can be installed. LPC review can add weeks or months and may restrict solar to non-visible roof sections.
- Fire Department (FDNY): has independent authority over battery storage systems and other fire safety aspects. FDNY approval is required for ESS.
- Local Laws 92 and 94: require new construction citywide to install either a solar PV system or a green roof (with certain exceptions). This drives an ongoing pipeline of new construction solar projects.
- ConEd network protector zones: in parts of Midtown and Lower Manhattan, ConEd's secondary network infrastructure limits or prevents solar interconnection for high-density commercial buildings.
New York State Unified Solar Permit (NYS USP)
For solar projects outside NYC, New York State offers a Unified Solar Permit format for residential PV systems up to 25 kW. Adopted by a large number of participating municipalities across the state, the NYS USP standardizes the permit application, plan set format, and inspection process across participating jurisdictions.
The NYS USP applies to residential systems only. Commercial solar projects follow standard municipal permit processes. Ground-mount and larger residential systems may fall outside NYS USP scope depending on the specific municipality.
The six major New York utilities for solar interconnection
Every New York solar project interconnects through one of six major utilities (plus various municipal utilities in specific service areas). Knowing the utility is essential because each has different interconnection processes, SLD requirements, and technical standards.
1. Con Edison (ConEd)
Consolidated Edison serves New York City (all 5 boroughs) plus Westchester County — approximately 3.5 million electric customers. ConEd is the largest and most complex interconnection process in New York. Special considerations:
- Network protector zones in Midtown and Lower Manhattan can prevent or limit solar interconnection
- Interconnection timelines for commercial can extend 6-10+ weeks routinely
- Specific VDER interconnection documentation required for value-of-DER-compensated systems
2. PSEG Long Island
Operated by PSEG under contract with the Long Island Power Authority (LIPA), PSEG-LI serves approximately 1.1 million customers across Nassau and Suffolk counties. Long Island has extremely high wind loads (145+ mph design wind speed in some coastal areas) driving specific structural design requirements. NYS USP applies to residential systems in participating Long Island municipalities.
3. National Grid
National Grid serves approximately 1.7 million electric customers across upstate New York, including Albany, Syracuse, Buffalo, and surrounding areas. Winter snow loads in the western and northern service areas drive substantial structural design requirements.
4. NYSEG (New York State Electric and Gas)
NYSEG serves approximately 900,000 customers across central and western NY, portions of the Hudson Valley, and parts of the Southern Tier. AVANGRID subsidiary.
5. RG&E (Rochester Gas and Electric)
Rochester Gas and Electric serves approximately 380,000 customers in the Rochester metropolitan area. Also an AVANGRID subsidiary.
6. Orange & Rockland (O&R)
Con Edison subsidiary serving approximately 305,000 customers in Rockland, Orange, and Sullivan counties in New York (plus a small NJ territory through Rockland Electric).
Beyond these six IOUs, New York has various municipal utilities and cooperatives serving specific communities. Central Hudson, though not in the list above, serves the Hudson Valley region.
NY-Sun and VDER — the incentive and compensation framework
Two frameworks shape the economics of NY solar:
- NY-Sun: NYSERDA's incentive program supporting residential, small non-residential, and commercial/industrial solar. Includes Megawatt Block incentives that decline as capacity targets are met in each region.
- Value of Distributed Energy Resources (VDER): NY's compensation structure for solar exports, replacing traditional net metering for most new projects. VDER assigns a per-kWh value based on multiple components (energy value, capacity value, environmental value, demand reduction, locational, etc.).
Solar plan sets and interconnection paperwork need to identify the applicable incentive designation and VDER treatment, which affects the meter configuration and documentation.
Top New York AHJs for solar
New York City (5 boroughs, via DOB)
By permit volume, NYC is the largest single AHJ in the US for solar. All 5 boroughs file through the DOB NOW: Build portal with PE/RA stamping required.
Long Island (Nassau & Suffolk counties)
Very high residential solar volume, primarily processed through participating NYS Unified Solar Permit municipalities. Nassau County towns (Hempstead, Oyster Bay, North Hempstead) and Suffolk County towns (Brookhaven, Islip, Babylon, Huntington, Smithtown, Southampton, East Hampton) are major solar permit volumes.
Westchester County
Suburban solar market, ConEd territory for most. Yonkers, White Plains, New Rochelle, Mount Vernon, and other Westchester municipalities are active.
Rochester and surrounding towns
RG&E territory, active residential and commercial solar volume.
Buffalo and Erie County
National Grid territory, growing solar market with high snow load design considerations.
Syracuse and Onondaga County
National Grid territory, active residential market.
Albany and Capital Region
National Grid and NYSEG territories, mix of residential and commercial activity.
Hudson Valley (Poughkeepsie, Kingston, etc.)
Central Hudson and NYSEG territories, growing solar market with some historic district considerations in specific towns.
Common New York solar permit rejection reasons
- NYC DOB submissions without PE/RA stamp: always required
- Missing FDNY documentation for battery storage: ESS projects in NYC require FDNY approval
- Landmarks Preservation Commission review not initiated: historic district projects need LPC review before DOB filing can complete
- Wrong utility SLD format: ConEd, PSEG-LI, National Grid all have different SLD conventions
- VDER documentation missing or incorrect: systems compensated under VDER need specific meter configuration and documentation
- Wind load calculations understated for Long Island coastal areas: design wind speeds are among the highest in the Northeast
- Snow load calculations understated for upstate NY: Buffalo, Syracuse, Rochester regions have substantial ground snow loads requiring appropriate racking selection
- NYS Unified Solar Permit used for ineligible project types: USP is residential only and has kW size limits
New York solar interconnection timelines (general)
- ConEd residential: typically 6-10+ weeks from complete application (longer than most NJ utilities)
- ConEd commercial: can extend 3-6+ months
- PSEG-LI residential: typically 3-6 weeks
- National Grid residential: typically 4-8 weeks
- NYSEG / RG&E residential: typically 4-8 weeks
- O&R residential: typically 3-6 weeks
Always confirm current timelines with the specific utility for your project.
Where outsourced solar design fits into New York's complexity
New York's complexity — two parallel permit systems, six utilities, historic districts, FDNY requirements, wind and snow load extremes, and multiple incentive frameworks — makes it exactly the kind of market where outsourced solar design pays off most.
An outsourced design team that has already built the templates, checklists, and utility-specific SLD formats for New York projects can turn around a NYC DOB submission or a PSEG-LI NYS USP application significantly faster than a generalist in-house team learning the state's specifics.
RIH Engineering provides outsourced solar PV design for EPCs, installers, developers, and roofing companies operating across New York State. We produce plan sets formatted for NYC DOB, NYS Unified Solar Permit, and every major NY utility, with structural calculations tuned to local wind and snow zones. If you want to talk through how outsourced design fits your NY pipeline, get in touch.
Frequently asked questions
What is the difference between NYC DOB and NYS Unified Solar Permit?
NYC DOB is the New York City Department of Buildings permit system, applicable to solar projects in the 5 boroughs and Westchester County. It requires PE or RA stamping and filing through DOB NOW: Build. The NYS Unified Solar Permit is a standardized permit format for residential solar (up to 25 kW) in participating municipalities outside NYC. They are two entirely separate systems.
Which utilities provide solar interconnection in New York State?
Six major utilities: Con Edison (NYC + Westchester), PSEG Long Island (Nassau + Suffolk), National Grid (Upstate NY), NYSEG (central/western NY), RG&E (Rochester area), and Orange & Rockland (Rockland/Orange/Sullivan counties). Plus various municipal utilities in specific communities.
What is VDER and how does it affect solar design in New York?
VDER (Value of Distributed Energy Resources) is New York's tariff structure that compensates solar exports based on multiple value components rather than traditional net metering. Systems on VDER need specific meter configuration and documentation in the interconnection application and plan set.
Do I need PE stamping for solar plan sets in New York City?
Yes. NYC DOB requires PE (Professional Engineer) or RA (Registered Architect) stamping on essentially all solar permit plan sets in the 5 boroughs. This is a firm requirement enforced through the DOB NOW: Build filing process.
What are Local Laws 92 and 94 in New York City?
LL92 and LL94 require most new construction in NYC to install either a solar PV system or a green roof (with certain building type exceptions). This drives a substantial and ongoing pipeline of new construction solar projects that must be designed to meet the mandate.