Historic districts and the Historic Review Commission
If your property sits in one of Pittsburgh's historic districts and the array would go on a principal facade visible from the street, the exterior modification needs Historic Review Commission approval. This is not hypothetical: a case in the Manchester Historic District went through that review in March 2025 before installation, so there is a documented path rather than an unknown one.
What that means in practice is that placement becomes part of the approval question rather than a purely technical choice. A rear plane, a lower roof behind the main mass, or a secondary structure may avoid the visibility trigger entirely, and the best-producing plane on the house may be the one that draws the most scrutiny. Establish what is likely to be approvable before you pay for a design built around the front elevation.
Ask your installer whether they have taken a project through the Historic Review Commission before, and what it added to the timeline. A company that has done it will describe the process; one that has not may treat it as a detail to sort out later, which is when it becomes a delay.
A lower yield makes sizing matter more
The planning figure for Pittsburgh is about 1,167 kWh a year for every kW installed, derived from satellite irradiance data with a standard performance ratio applied rather than measured locally. It is a modest figure, which does not make solar a bad idea here, but it does mean each installed kW returns less than a headline number might suggest, so the arithmetic has less slack in it.
The practical consequence is that guessing is expensive. Shade, orientation and pitch each move the number, and a design that survives a generous production assumption can fall short of worthwhile once the real figure is used. Ask for production modelled per roof plane with stated shading assumptions, and be more sceptical than usual of a proposal that adds panels to a compromised face to lift the headline total.
It also raises the value of getting the roof right first. If the covering is near the end of its life, the cost of removing and reinstalling an array later eats directly into the return, so ask whether replacing the roof first is the cheaper sequence.
Duquesne Light, and what a credit is worth
Pennsylvania's Public Utility Commission sets net metering at the full retail rate for the state's investor-owned distribution companies, Duquesne Light among them. Excess generation is credited kWh for kWh against your usage in each billing period, which is the most straightforward arrangement a homeowner can have: an exported kilowatt-hour buys back a kilowatt-hour later.
Once a year the utility reconciles any credit still banked at the regulated Price to Compare rate, which is lower than full retail. So the value of your system depends partly on whether the credit you build up in summer gets used during the year or sits in the bank until reconciliation.
A system sized to a household consumption will mostly be used as it is generated rather than banked, which makes full retail crediting straightforwardly good news. Ask your installer to confirm the current net metering tariff for Duquesne Light specifically, since terms are set per utility rather than uniformly across the state.
Who controls the roof
Single-detached houses are 43.6 percent of Pittsburgh's 161,908 housing units, so a large minority of residents can decide on their own, subject to historic review where it applies.
Buildings of 20 or more units hold 17.3 percent, where a resident does not control the roof and the decision belongs to the owner or the association. Single-attached units are 14.1 percent, and there the roof plane and the property line need establishing on site rather than from an aerial photograph.
Two-unit buildings hold 7.8 percent and three and four unit buildings 6.7 percent. Roof rights in those can involve more than one owner, and an array feeds one electrical service, so which meter it connects to decides whose bill it reduces. Where the units are separately owned, that has to be agreed in writing before a design is commissioned.
AECs, and the credit that ended
Pennsylvania's Alternative Energy Portfolio Standards Act gives the owner of a certified solar system one Alternative Energy Credit for every 1,000 kWh generated, saleable to utilities and suppliers that need them for compliance. Registration runs through the PA AEPS portal and the PJM Generation Attribute Tracking System, directly or via an aggregator or broker.
Treat the revenue as variable. AEC prices are set by supply and demand on an open market and fluctuate, so they are not a reliable income stream and should not appear as a fixed line in a payback calculation. If an installer includes them, ask what price they assumed and where that price came from.
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, so a 2026 purchase in Pittsburgh cannot claim it. Several sources you may be pointed to have not been updated and still show the old text. Where a homeowner takes a lease or a power purchase agreement instead, the provider may claim the business credit under Section 48E and reflect part of it in the rate they offer.