One roof, two households, and whose meter it feeds
Two-unit structures are 35 percent of Buffalo's housing, almost matching the 36.2 percent that are single-family detached. That is a far higher duplex share than most American cities carry, and it puts roughly a third of households in a position where the roof is shared with exactly one other party.
A double house is the most tractable of the shared-roof situations. There is one other owner rather than a board or a management company, so the conversation is short. But it does have to happen, and it has to be written down: fixings and penetrations, access for maintenance, what happens when the covering is replaced and who pays for it.
The question that gets missed is metering. An array normally connects to one meter, so it offsets one household's consumption rather than the building's. If you own the whole double and rent the upper unit, that determines which account benefits and therefore how the system should be sized. If you own one unit and your neighbour owns the other, it determines who is actually buying the electricity the array produces, which needs settling before anyone designs a layout.
Buildings of 20 or more units are only 10.7 percent of the stock, a small share, and there the roof belongs to the building owner. For the 36.2 percent in detached houses the decision is yours alone and the rest of this page is about the roof and the numbers.
The NY-Sun block you may have read about is closed
NY-Sun's standard-income residential megawatt block for the Upstate region closed on December 17, 2025. Upstate residential blocks cover installations in the NYSEG, RG&E and National Grid electric service territories, so that closure applies to Buffalo.
This matters because NY-Sun has been a headline feature of New York solar guidance for years, and a great deal of published material still describes it as available. If a quote, an article or a calculator applies a standard NY-Sun incentive to your project, it is describing a programme state that has passed.
What remains is income-qualified. The Affordable Solar Residential Incentive is still available at 0.80 $ per watt of installed capacity in the Upstate and Con Edison regions, for households at or below 80 percent of Area Median Income. That is a substantial figure for those who qualify, so it is worth checking your position against the threshold rather than assuming you do not.
If you do not qualify, plan on no state block incentive and ask any installer to show you the payback on that basis. Programme blocks have opened and closed before, so it is reasonable to ask whether anything is expected to reopen, but that is a question about the future rather than something to build a budget on.
What a Buffalo roof produces, and what winter does to it
Plan on roughly 1,152 kilowatt hours a year for every kilowatt installed on a well oriented, unshaded array. That is a screening figure derived from irradiance data rather than a measurement from Buffalo roofs, so treat it as a ceiling for your address.
Because the figure is modest, orientation carries more weight here than it would somewhere sunnier. A south-facing unshaded plane produces the most, east and west planes produce usefully but give up output you can less afford to lose, and a north plane rarely repays the hardware. On a double house the available plane may be decided by which section of roof is yours, which is another reason to settle the ownership question first.
Snow removes production entirely until it clears, and Buffalo gets more of it than most. A steeper plane sheds faster than a shallow one, so ask how the proposed pitch and layout handle it rather than treating the annual figure as evenly distributed. It does not change the yearly total much, but it changes when the production arrives.
Check the roof covering age before anything is ordered. Panels outlast most coverings, so one within a few years of replacement should be replaced first rather than paying later to remove and reinstall the array. On a double house that later re-roof involves your co-owner as well, which makes getting the order right worth more.
The federal credit is gone too, so rebuild the numbers
The 30 percent federal residential tax credit under Section 25D applied through December 31, 2025 and is not available for a purchased home system placed in service after that date. A purchase in Buffalo now cannot claim it.
Coming within weeks of the Upstate NY-Sun block closing, that is two significant supports removed in quick succession. Anything written before late 2025 is describing a materially different set of economics, and much published material has not caught up. That is usually staleness rather than dishonesty, but the payback figure it produces is wrong.
Ask any installer to show the arithmetic built only from what still exists: the Affordable Solar incentive if you qualify, net metering credits on your own utility's tariff, and the electricity you stop buying. Ask what net metering terms apply to your service specifically, since Upstate covers three utility territories with their own arrangements.
If you take a lease or a power purchase agreement rather than buying, the provider may claim the business version of the credit under Section 48E and reflect part of that value in the rate they offer. What they claim and what reaches you are separate questions, so put both to the provider and confirm with a tax advisor rather than with the sales material.