NYC Solar Permit Guide — DOB BIS, SolarApp+, and NYC AHJ Requirements

New York City is the largest solar permit market in the northeastern United States — and one of the most technically demanding AHJs in the country for solar installations. The NYC Department of Buildings (DOB) processes solar permits through its Buildings Information System (DOB BIS) with requirements that go significantly beyond most municipal building departments: full professional engineering (PE) stamp on all drawings, a detailed 3-line diagram for commercial systems, and multiple NYC Local Law compliance checks layered on top of the base NEC 2020 electrical requirements.

An installer moving from California or Texas to NYC for the first time will encounter a permitting landscape that is more rigorous, more bureaucratic, and more dependent on local relationships — particularly with registered NYC expediters — than almost any other US market. Understanding the DOB BIS system, the PE-stamp requirements, the Con Edison interconnection timeline, and the unique NYC fire and structural rules is the baseline for a functional NYC solar permit operation.

Direct answer. NYC solar permits require a DOB BIS filing with a NY PE-stamped drawing set (electrical SLD + 3-line diagram for commercial + structural calculations), a Con Edison or PSEG Long Island interconnection application (for properties outside the five boroughs), and compliance with NYC Local Laws including NYC Electrical Code (NEC 2020 with NYC amendments), NYC Building Code (NYCBC), and NYC Fire Code. Residential systems on Class 1 (R-3) buildings ≤ 25 kW may qualify for NYC’s SolarApp+ pathway, which issues permits in 1–5 business days. All other systems require full DOB plan examination, typically 15–45 business days.

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NYC DOB — The Permitting Authority for Solar in the Five Boroughs

The NYC Department of Buildings (DOB) is the AHJ for all building permits in Manhattan, Brooklyn, Queens, the Bronx, and Staten Island. Every solar installation that adds a structure to or penetrates a building requires a DOB permit — there is no Houston-style electrical-only pathway in NYC.

NYC permitting operates through two systems:

• DOB BIS (Buildings Information System) — the legacy permit system used for most residential work
• DOB NOW — the newer online portal for self-certification jobs, new buildings, and alterations

Solar permit applications in NYC are filed as Alteration Type 2 (Alt-2) applications when the work is limited to the solar installation. If the solar project triggers other building work (electrical service upgrade, structural reinforcement, roof repair), the scope may require an Alteration Type 1 (Alt-1) application.

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The NYC Solar Permit Pathway — SolarApp+ vs. Full DOB Plan Exam

NYC adopted SolarApp+ in 2023 as an expedited pathway for qualifying residential solar installations. The dual-pathway system means installers must first screen for SolarApp+ eligibility before defaulting to full plan examination.

Parameter	SolarApp+ (NYC)	Full DOB Plan Exam
System size	≤ 25 kW AC	Any size
Occupancy	R-3 single-family and small residential	All occupancies
Drawing requirements	Auto-generated SLD + prescriptive structural	Full NY PE-stamped drawing set
PE stamp	Not required for SolarApp+ pathway	Required — NY-licensed PE
Typical timeline	1–5 business days	15–45 business days (residential); 30–90 days (commercial)
Storage co-permit	Not eligible	Separate Alt-2 application
Expediter needed	Not typically	Strongly recommended
First-pass approval rate	~72% (NYC data, 2024–2025)	~65% (standard plan check round 1)

For the broader US permit framework, see How to Submit a Solar Permit Package to an AHJ and Solar PE Stamp Explained.

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NYC SolarApp+ Eligibility — The 9-Point Screening Checklist

Before filing a NYC solar permit via SolarApp+, screen the project against these nine conditions. A single disqualifying item routes the project to full DOB plan exam.

1. Occupancy class: Class 1 residential (R-3 single-family, 1–2 family dwelling). Multi-family, commercial, and industrial are not eligible.
2. System size: ≤ 25 kW AC total inverter output.
3. Roof structure: Wood-frame roof construction with standard rafter spacing ≤ 24 inches on-center. Masonry, concrete, and structural steel roofs are not eligible for the prescriptive pathway.
4. Inverter type: UL 1741-listed utility-interactive inverter; must be in SolarApp+ database.
5. Racking: Must use a racking system listed in SolarApp+‘s pre-approved product library.
6. Interconnection method: Load-side interconnection using the 120% busbar rule (NEC 705.12(D)(3)). Supply-side (line-side tap) disqualifies.
7. No battery storage: BESS cannot be included in the same SolarApp+ permit application.
8. No panel upgrade: Electric service panel upgrade must be a separate Alt-2 application before or concurrent with the solar permit.
9. Building in good standing: DOB BIS shows no open violations requiring cure before new permit issuance. Check the property’s DOB BIS record for open violations before submitting.

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Full DOB Plan Exam — The NYC Solar PE Drawing Set

For systems that do not qualify for SolarApp+, or for any commercial solar installation, NYC requires a full NY PE-stamped drawing set submitted through DOB BIS or DOB NOW.

The NYC Solar Engineering Drawing Framework

NYC solar permit drawing sets follow a standard five-document structure that the DOB plan examiner expects in this order:

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The 3-Line Diagram — NYC’s Most-Requested Missing Document

The 3-line diagram requirement is the element that catches the most non-NYC solar permit designers off-guard. In most US states, a single-line diagram (SLD) is sufficient for all residential and commercial solar permit packages. NYC’s commercial solar permit process — and any installation with 3-phase service — requires a 3-line diagram as a separate, distinct drawing.

What a 3-line diagram shows (vs. an SLD):

Element	SLD	3-Line Diagram
Phase representation	Single line (simplified)	Three separate lines (A, B, C phases)
Neutral and ground	Often shown as single conductor	Explicitly shown per phase
Protective device sizing	Shown once per circuit	Shown per phase with trip curves
Metering	Block diagram	Full CT/PT metering wiring
Utility interface	Interconnection point only	Complete utility service entry with meter socket and utility disconnect
Use case	All residential; commercial basic	All 3-phase commercial; required by most NYC plan examiners for any commercial system

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NYC Fire Code Requirements for Solar

NYC adopts the International Fire Code (IFC) with NYC-specific amendments. The key fire code requirements for solar installations that affect the permit drawing set:

Roof Access Path (NYC Fire Code 504.4):

• A minimum 36-inch-wide access path from the roof access point to each section of the solar array must be maintained
• The access path cannot be blocked by solar modules or racking

Fire Setbacks:

• Ridge setback: 18 inches from the ridge
• Hip and valley setbacks: 18 inches
• Perimeter setback: 18 inches from the roof edge
• These setbacks apply on all roof planes with solar

Array Sectioning:

• Arrays must be sectioned into areas ≤ 150 square feet with internal pathways of ≥ 36 inches between sections for flat/low-slope roofs
• Pitched roofs: standard setback requirements apply without mandatory sectioning within the array

Rapid Shutdown System (NYC Electrical Code, NEC 690.12):

• Required on all NYC solar installations
• The rapid shutdown initiation device must be located at the utility service entrance, accessible to first responders without entering the building
• NYC DOB plan examiners specifically verify the initiation device location on the SLD

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Con Edison Solar Interconnection — NYC’s Utility Process

Consolidated Edison (Con Edison) serves Manhattan, the Bronx, Brooklyn, Queens, and Westchester County. For NYC solar installations, the Con Edison interconnection application runs parallel to the DOB permit and is a separate process.

Con Edison Distributed Generation Interconnection Process:

System Size	Interconnection Track	Typical Timeline	Key Requirement
≤ 25 kW (residential)	Simplified Track 1	20–40 business days	UL 1741 inverter; load-side only
25–500 kW (C&I)	Standard Track 2	45–90 business days	Technical feasibility study; revenue-grade metering
> 500 kW	Full Study Track 3	90–180+ business days	System impact study; distribution upgrade analysis

Con Edison requires:

• Completed Con Edison DG interconnection application (online portal)
• Technical drawings (SLD, 3-line for commercial)
• Equipment specifications (inverter must meet Con Edison’s technical requirements)
• Copy of DOB permit (or evidence of application) — required before Con Edison final approval

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NYC Expediter — When You Need One and What They Do

A DOB expediter is a licensed professional who specializes in navigating the NYC DOB permit system, including managing plan examination queues, responding to plan examiner comments, and coordinating across DOB borough offices. For solar permits, expediters become valuable in three scenarios:

When to use an NYC solar permit expediter:

1. Commercial systems with full plan exam — The plan examiner queue for Alt-2 commercial applications is managed differently from residential. An expediter with relationships in the commercial plan review division can often identify the specific plan examiner assigned to a project and communicate directly.

2. Projects with open DOB violations — An expediter can navigate the violation resolution process (identifying the originating inspector, arranging re-inspection, clearing the violation record) faster than a first-time applicant unfamiliar with DOB BIS.

3. Large multi-family or mixed-use buildings — These require additional NYC Building Code review beyond the scope of a standard solar Alt-2 filing. An expediter ensures the application is structured correctly to avoid a reclassification to Alt-1 scope.

What an expediter does not do: An expediter manages the DOB administrative process — they are not the PE of record for the stamped drawings. The engineering drawings must come from a NY-licensed PE. The expediter and the PE are separate engagements.

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NYC Structural Considerations — Snow Load and Wind Zone

New York City’s structural engineering requirements for solar include snow load and wind load parameters that differ from most US markets:

NYC Structural Parameters:

• Ground snow load: 30 psf (pounds per square foot) — NYC’s latitude and climate require snow load analysis that is irrelevant in Florida or Texas
• Design wind speed: Vult approximately 115 mph (ASCE 7-22, NYC); Exposure B for most urban locations; Exposure C or D for coastal Staten Island and waterfront locations
• Seismic: NYC is Seismic Design Category A or B — seismic loads are generally not the governing design condition for solar

Snow load impact on solar structural design: Solar array snow load analysis must consider:

• The additional dead load of accumulated snow on the array (module surface typically allows some snow to slide)
• The increased point loads on roof attachment fasteners during snow accumulation
• Roof slope — NYC has a significant stock of flat and low-slope commercial roofs where snow accumulation is highest

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NYC Solar Permit Fees

NYC DOB permit fees for solar installations vary by system type and filing method. Approximate fee schedule as of 2026:

Item	Approximate Cost
DOB Alt-2 filing fee (residential solar)	$250–$500
DOB plan examination fee	$150–$350 (included in filing for residential SolarApp+)
DOB electrical permit (separate from building permit)	$200–$450
NYC expediter fee (if used)	$500–$2,000 depending on scope
NY PE stamp (structural + electrical)	$500–$1,500 depending on system size
Con Edison DG application fee	$0 for Track 1; varies for Track 2–3
NYC State surcharges	~$50–$100

Total NYC permitting cost for a standard residential system (not SolarApp+ eligible): approximately $1,500–$4,000 including engineering and permit fees. SolarApp+-eligible systems reduce this significantly.

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NYC Performance vs. Other Northeast AHJs

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The 12 Most Common NYC Solar Permit Plan Corrections

#	Correction	Fix
1	3-line diagram missing on commercial application	Always include 3-line diagram for any commercial or 3-phase system
2	Fire setback annotation absent or incorrect on roof plan	Add 18-inch setback lines on all roof edges, ridges, valleys, hips
3	Roof access path not shown (NYC Fire Code 504.4)	Annotate 36-inch access path from roof access hatch to each array section
4	PE not NY-licensed (out-of-state PE stamp)	NY PE license required; verify NY PE license number on drawings
5	Snow load not included in structural calculation	30 psf ground snow load must be in the structural calc
6	Rapid shutdown device location not labeled on SLD	Show rapid shutdown initiation device at service entrance on SLD
7	NYC Electrical Code amendments not referenced	SLD notes must reference NYC Electrical Code (NYCECC), not just NEC 2020
8	Open DOB violation blocking permit issuance	Run DOB BIS address check before submission; resolve open violations first
9	Interconnection method not specified on SLD	Explicitly state load-side interconnection and the 120% busbar compliance on SLD
10	Masonry roof assumed wood-frame for prescriptive structural	Verify building construction type in DOB BIS before using prescriptive structural pathway
11	Equipment schedule on separate sheet (not on stamped drawing)	Include equipment schedule on stamped drawing set per DOB requirement
12	Con Edison equipment approval not confirmed	Verify inverter is on Con Edison’s technical requirements list for DG equipment

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NYC vs. Other Northeast Metros — AHJ Comparison

Verdict. NYC is a demanding but high-value solar permit market. The SolarApp+ pathway has transformed residential solar throughput — installers who qualify the majority of their projects for SolarApp+ can maintain competitive lead times. Commercial solar in NYC requires genuine NYC-specific engineering expertise (3-line diagrams, NYC fire code, NYC snow load) that makes outsourcing to a NY-licensed PE team more cost-effective than building this capability in-house for most installers.

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NY State Outside NYC — Key Differences

For installers working outside the five boroughs, the permitting landscape changes substantially:

• Westchester, Nassau, Suffolk counties: Con Edison or PSEG Long Island are the utilities; local municipal building departments are the AHJ (not DOB). Requirements vary significantly by municipality — some adopt SolarApp+, others require manual plan check.
• Upstate NY (Albany, Buffalo, Rochester, Syracuse): National Grid or NYSEG is the utility; RG&E in Rochester. NEC 2020 base code but local amendments vary. Generally less complex than NYC with faster timelines.
• New York State Energy Research and Development Authority (NYSERDA): NYSERDA’s NY-Sun program provides incentives for residential and commercial solar across NY State. The NY-Sun Megawatt Block incentive structure affects project economics but not the permit process directly.

According to the Solar Energy Industries Association (SEIA), New York is a top-10 US state by installed solar capacity, with strong growth driven by the NY-Sun program and offshore wind development context. The NYSERDA NY-Sun program has facilitated over 5,000 MW of distributed solar in the state as of 2025. The National Renewable Energy Laboratory (NREL) permitting report 2024 identified NYC as one of the nation’s most technically complex municipal solar permit environments. The NYC Department of Buildings processes over 15,000 solar permit applications annually as of 2025, making it the single-largest municipal solar permit volume in the Northeast.

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How Heaven Designs Serves NYC and Northeast Installers

NYC’s PE stamp requirement, 3-line diagram requirement, NYC Fire Code setbacks, snow load structural calculations, and Con Edison interconnection documentation create a permit package complexity that is significantly higher than most US markets. These are precisely the conditions where outsourced engineering and permit design delivers the clearest ROI.

• Solar Permit Design (USA) — NYC-specific permit packages including NY PE-stamped drawings, 3-line diagrams for commercial, NYC Fire Code setback-compliant roof plans, and snow load structural calculations. 4–7 business days. 96.2% first-pass approval rate.
• Solar Civil & Structural Engineering — NY-licensed PE structural calculations for NYC solar installations including snow load, NYC wind zone, and pre-war building structural assessments.
• Solar 3D Pre-Design — 48-hour sales-stage layout with NYC Fire Code setback annotation — identifies SolarApp+ eligibility before design lock.
• Download sample deliverables — Sample NYC residential permit set including SLD, roof plan with fire setbacks, and structural calculations.

For the broader US permit framework, see Solar PE Stamp Explained and How to Submit a Solar Permit Package to an AHJ.

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FAQ

Does NYC require a PE stamp on all solar permit drawings?

For SolarApp+-eligible residential systems, a PE stamp is not required — SolarApp+ uses a prescriptive structural pathway that does not require individual engineering review. For all other NYC solar permits (commercial systems, systems exceeding SolarApp+ eligibility limits, masonry buildings, and any system requiring full DOB plan examination), a NY-licensed PE stamp on the structural calculations and electrical drawings is required. The PE must hold an active NY State Professional Engineer license — a PE license from another state is not accepted.

What is the DOB BIS and how does it work for solar permits?

DOB BIS (Buildings Information System) is the NYC Department of Buildings’ permit management system. Solar permit applications are filed as Alteration Type 2 (Alt-2) applications. The property owner or licensed contractor files the application online or in person at the DOB borough office. DOB BIS maintains the property’s permit history, open violations, and certificate of occupancy records. Before filing any NYC solar permit, check the property’s DOB BIS record to confirm no open violations that would block permit issuance.

How long does Con Edison solar interconnection take in NYC?

For residential systems ≤ 25 kW (Track 1), Con Edison typically processes the interconnection application in 20–40 business days from receipt of a complete application. For commercial systems 25–500 kW (Track 2), the timeline is typically 45–90 business days including technical feasibility study. Filing the Con Edison application concurrently with the DOB permit application — rather than waiting for DOB permit issuance — is the most effective way to minimize total project timeline.

Can I use SolarApp+ for NYC brownstones and rowhouses?

It depends on the building’s construction type. Many NYC brownstones and rowhouses have masonry bearing-wall construction with wood-joist floor and roof framing. If the roof framing is wood-frame with standard rafter spacing ≤ 24 inches, the building may qualify for SolarApp+‘s prescriptive structural pathway. However, if the masonry walls or structural condition creates a non-standard loading scenario, the system requires full DOB plan examination with PE-stamped structural calculations. Verify the specific building’s construction type in DOB BIS before committing to the SolarApp+ pathway.

What is the difference between a 3-line diagram and a single-line diagram for NYC solar?

A single-line diagram (SLD) represents the electrical system using a single line to represent each circuit, regardless of the number of conductors. A 3-line diagram shows all three phases explicitly, including phase-specific conductor sizes, protective device settings, CT/PT metering circuits, and the utility interface at the service entrance. NYC DOB plan examiners require 3-line diagrams for commercial solar installations and all 3-phase systems. Using an SLD where a 3-line diagram is required results in a plan correction, adding approximately 15 business days to the permit timeline.

Does NYC have a net metering program?

New York State has a net metering program governed by the New York Public Service Commission (PSC). NYC customers on Con Edison receive net metering credits for excess solar generation sent back to the grid. Con Edison’s net metering tariff provides a bill credit at the full retail electricity rate for net excess generation. The net metering arrangement is established through the Con Edison interconnection process — after the interconnection agreement is executed, Con Edison installs a bi-directional meter. NYC customers may also be eligible for Community Distributed Generation (CDG) if their building or roof characteristics make direct solar installation impractical.