What a year of production looks like in Yonkers
The planning figure for Yonkers is about 1,287 kWh a year for every kW installed. That number is derived rather than published: it is a standard performance ratio applied to satellite irradiance data for the area, so use it to size expectations and let a site survey set the real number.
Yonkers sits on hills, and slope changes the picture in two directions. A roof that faces down the hill toward open sky has a clear horizon in front of it, while a roof with rising ground and mature trees behind it can lose meaningful winter production even though it looks unshaded in July. Ask for a shading analysis that covers December, not a summer photograph.
The other variable is roof age. Panels are normally warranted for decades, and taking an array down and putting it back to replace shingles underneath is an avoidable cost. If the roof is within a few years of replacement, doing both at once is usually the cheaper sequence.
Yonkers uses the state Unified Solar Permit
Yonkers has adopted the NYS Unified Solar Permit, NYSERDA's standardised statewide application form for small residential solar systems, which exists to speed up local review by giving every adopting municipality the same paperwork. For a homeowner the benefit is practical: a contractor who works across Westchester is already filing the same form elsewhere, so the local submission is familiar rather than bespoke.
Ask your installer directly whether they are filing under the Unified Solar Permit for your project, and ask what supporting material the city expects alongside it. The form is standard; the attachments, the structural detail and the electrical drawings are still specific to your house.
The permit is separate from the utility interconnection, and the two run on their own clocks. A project can be permitted locally and still be waiting on the utility, or the reverse, so it is worth asking your installer which step they expect to be the long pole on your job.
Con Edison, and how the Value Stack changes sizing
Con Edison serves Yonkers for electricity, under the same statewide interconnection process it runs for New York City. New residential customers are compensated under the Value of Distributed Energy Resources framework, the Value Stack, rather than legacy flat net metering, with exported energy valued using time-of-use and location-based components covering energy, capacity, environmental and demand reduction credits.
That framework rewards self-consumption. Energy your household uses at the moment it is generated avoids the retail price you would otherwise pay, while energy you export is valued by the stack instead, and a Customer Benefit Contribution charge applies to new distributed generation customers on top of that. The gap between those two treatments is why a larger array does not scale savings in a straight line.
The practical instruction is to bring your own usage data to the conversation. An installer who sizes from your actual consumption profile, and who models the current Con Edison Value Stack tariff for your address and rate class, is quoting something you can check. One who quotes a flat saving per kWh is not describing this market. The Department of Public Service sets and updates these rates, so the modelling should be current rather than carried over from a previous year.
A city split between apartment blocks and hillside houses
Yonkers holds 85,006 housing units, and 38.1 percent of them sit in buildings of 20 or more apartments, where a rooftop project needs building-owner or co-op board sign-off rather than a homeowner permit. If that describes your home, the realistic path is a proposal to whoever controls the building, not an individual application.
Single-family detached homes are 24.7 percent of the stock, concentrated on the city's hillier east side, and those owners control their own roof outright. That is the group for whom the Unified Solar Permit route is genuinely quick.
Between those two sit the older, denser neighbourhoods near the Hudson: 10.5 percent of units are in three-to-four unit buildings and 9.2 percent are two-unit structures. Those roofs raise a metering question before a solar question. An array feeds one electrical service, so in a multi-unit building you need to establish which meter it connects to and who is paying the bill it offsets. Settle that before commissioning a design.
What is left to claim, and what closed
The Con Edison region NY-Sun blocks are closed. The standard residential block at $0.15 per watt closed on May 29, 2025, and the income-qualified Affordable Solar block at $0.80 per watt closed on October 15, 2025. A Yonkers quote should show no NY-Sun incentive, and if one appears you should ask the contractor to evidence it before signing.
The federal credit is also gone for purchasers. The 30 percent residential credit under Section 25D applied through December 31, 2025 and does not cover a purchased home system placed in service after that date. Where a lease or power purchase agreement is involved, the provider may claim the business version of the credit and pass part of the value through in the rate you are offered, which is a question to put to the provider and to a tax advisor rather than an assumption to build into your own numbers.
New York State's own credit is unaffected by any of that. The Solar Energy System Equipment Credit is 25 percent of qualified residential solar expenditures capped at $5,000, claimed on Form IT-255 with your state return, with up to five years of carryforward if the credit exceeds your liability. It covers purchased, leased and power-purchase-agreement systems at your primary New York residence, and you claim it yourself rather than receiving it through the installer.