The licences your contractor needs before anything is filed
Reading requires three things in place before a solar building permit and electrical permit application will be accepted by Building and Trades: a zoning permit, a Business Privilege License held by the contractor, and a City of Reading electrical trade license. Only Master Electricians may pull permits.
That is a strict local requirement and it is the single most useful thing to ask about on a first call. A contractor who already works in Reading will hold the licences and treat the list as routine. One who works the county but not the city may not, and the discovery usually comes after a deposit rather than before. Ask directly: do you hold a City of Reading electrical trade license, do you hold a Business Privilege License, and who is the Master Electrician pulling the permit.
The upside of a licensing gate this specific is that it filters out the least established operators before they reach your roof. The downside is that it narrows your choice of installer, so start the question early rather than after you have picked a favourite quote.
Fifteen business days, from a complete packet
Once a complete packet is received, the city has 15 business days to process a residential permit. Commercial work runs to 30. That is a published commitment rather than an estimate, which is more than most cities offer, and it gives you something concrete to plan around.
The phrase carrying the weight is complete packet. The clock starts when everything is in, so an application missing a licence, a drawing or the zoning permit does not sit in a queue for 15 days, it sits outside the process entirely. Most of the delay people experience in cities like this is spent assembling the submission rather than waiting for a decision.
Ask your contractor to show you the packet before it goes in, and to confirm the zoning permit is already issued rather than in progress. Ask as well who books the inspection once the work is done, since that is the step most often left unclaimed between homeowner and installer.
If your property is on the historical side of the city
Where a solar permit application is for a property on the historical side of Reading, Building and Trades forwards the application to the city's Historical Department for approval before a permit is issued. It is a sequential step rather than a parallel one, so it adds to the timeline rather than running alongside it.
Find out early whether your address falls into that category, because it changes both the schedule and, potentially, where the panels can go. Placement on a rear plane or a lower roof behind the main mass is often the difference between a straightforward approval and a contested one.
It is worth asking your contractor whether they have taken a project through the Historical Department before, and what it added. A company that has will tell you plainly. One that has not may not know the referral exists until the application is forwarded.
Rowhome roofs, and what fits on them
Reading is a rowhome city. Single-attached units are 52.2 percent of its 36,032 housing units, and only 11.8 percent are single-detached houses, so the freestanding house that most solar advice is written around is the exception here rather than the norm.
A rowhome roof is smaller, frequently flat or close to it, and shares a party wall with the neighbour. That means the ceiling on system size is set by usable area rather than by your consumption, that mounting is usually a tilted or ballasted frame rather than panels on a pitch, and that establishing exactly where your roof ends is part of the survey rather than a formality. Ask for the roof to be measured on site and the structure assessed for the load of a ballasted array.
Three and four unit buildings hold 9.9 percent of the stock and two-unit buildings 8.3 percent, where roof rights can involve more than one owner and an array feeds a single electrical service, so it reduces one household's bill. Buildings of 20 or more units hold 9.2 percent, where the roof belongs to the owner or the association rather than a resident.
What you earn, and what you no longer get
Pennsylvania's Public Utility Commission sets net metering at the full retail rate, so excess generation is credited kWh for kWh against your usage each billing period. Once a year the utility reconciles any credit still banked at the regulated Price to Compare rate, which is lower than full retail, so credit used during the year is worth more than credit left sitting. On a rowhome roof, where system size is capped by area anyway, running a large permanent surplus is unlikely.
Separately, the Alternative Energy Portfolio Standards Act gives the owner of a certified system one Alternative Energy Credit for every 1,000 kWh generated, saleable to utilities and suppliers needing AEPS compliance. Registration runs through the PA AEPS portal and the PJM Generation Attribute Tracking System, directly or through an aggregator. Prices are set on an open market and fluctuate, so treat the income as variable rather than as a line in a payback calculation.
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 Reading cannot claim it. Material published locally and nationally has not all been updated, so a document showing the old text is out of date rather than a sign you have missed something. If you take a lease or a power purchase agreement, the provider may claim the business credit under Section 48E and reflect part of it in your rate.