Top 5 common mistakes solar permits applicants make

Mistake 1: Treating the Building Permit and Utility Interconnection as One Process

What people do wrong: Applicants submit their local building permit and then wait for it to come back before starting the utility interconnection application. They assume the permit is the finish line.

Why it costs you: Utility interconnection — the process that ends with a Permission to Operate (PTO) — runs on a completely separate track from your local building permit. In Arizona, the full timeline from permit application to PTO is 4–10 weeks. In Arkansas, local permits take 1–4 weeks, but the utility interconnection review adds another 30–90 days on top of that. In California, even with streamlined 1–3 business day permit issuance, the utility PTO from PG&E, SCE, or SDG&E takes an additional 2–8 weeks after a complete interconnection application. If you wait for the building permit before filing with the utility, you're stacking those timelines instead of running them in parallel. On a 90-day Arkansas interconnection, that mistake alone can push your go-live date out by a month or more — delaying when you start offsetting your electricity bill.

The fix:

1. File your local building permit application and your utility interconnection application at the same time, as soon as your system design is finalized.
2. Confirm your utility's specific interconnection form and requirements before submitting — APS, SRP, TEP, Arkansas utilities, and Alaska utilities all have different portals and documentation checklists.
3. Track both applications separately. Don't assume one approval means the other is close.

Mistake 2: Assuming Your Neighbor's Permit Process Is the Same as Yours

What people do wrong: Applicants research solar permits online, find a checklist that looks official, and submit based on that — without confirming it matches their specific city, county, or utility.

Why it costs you: Alabama has no statewide solar permit standard. Alaska has no statewide solar permit. Arizona, Arkansas, and California all delegate permitting to local Authorities Having Jurisdiction (AHJs). In Fairbanks, Alaska, the City of Fairbanks and the Fairbanks North Star Borough have separate jurisdictions depending on your address — submitting to the wrong one means starting over. A rejected or returned application adds 1–3 weeks of delay at minimum, plus potential resubmission fees that typically run $50–$300 depending on the AHJ.

The fix:

1. Before preparing any documents, call or email the building department for your specific address. Confirm: which permits are required, what the current fee schedule is, what format they accept (paper vs. online), and whether a structural engineer's stamp is needed.
2. In Alaska, use your parcel address to confirm borough vs. city jurisdiction before submitting anything.
3. In Alabama, don't assume the county process matches the city process — they are independent.

Mistake 3: Hiring an Unlicensed or Wrong-Classification Contractor

What people do wrong: Applicants hire a contractor based on price or a referral without verifying the license type. Some installers hold a general contractor license but not the specific classification required for solar.

Why it costs you: In Arizona, solar installers must hold an A-17 or C-11 license classification from the Arizona Registrar of Contractors (ROC). Work performed by an unlicensed or wrong-classification contractor can result in permit rejection, failed inspections, and — most expensively — voided manufacturer warranties and homeowners insurance claims. If a roof leak or electrical fault occurs and the installer wasn't properly licensed, your insurer has grounds to deny the claim. Remediation costs for improperly installed systems typically run $1,500–$8,000 depending on the scope of rework required.

The fix:

1. In Arizona, verify the installer's license at roc.az.gov before signing any contract.
2. In every state, ask the installer for their license number and the issuing authority, then look it up yourself — don't take their word for it.
3. Confirm the license classification covers both the electrical and structural work, or verify they're subcontracting the electrical work to a licensed electrician.

Mistake 4: Submitting Incomplete or Non-Stamped Structural Documentation

What people do wrong: Applicants submit permit applications with manufacturer spec sheets but without the site-specific structural drawings or engineer's stamp that many jurisdictions require. They assume the spec sheet is enough.

Why it costs you: Many jurisdictions — particularly in Alabama and Alaska — require a licensed structural engineer to stamp drawings confirming the roof can support the array load. If you submit without this and the AHJ requires it, your application is returned incomplete. A structural engineering review typically costs $200–$600 for a residential system. But the real cost is the delay: an incomplete application adds 2–4 weeks to your timeline while you commission the engineering work, receive the stamped drawings, and resubmit. In California, the streamlined 1–3 day permit process is only available for systems that meet all submittal requirements on the first submission — an incomplete package loses that fast-track status.

The fix:

1. Before preparing your submittal package, ask the AHJ directly: "Do you require a structural engineer's stamp for rooftop solar?" Get the answer in writing (email is fine).
2. If required, budget $200–$600 and 1–2 weeks for the engineering review, and build that into your project schedule before submitting.
3. For California streamlined applications, use the AHJ's published checklist — most cities post the exact required documents online. Submit everything on the list, nothing missing.

Mistake 5: Counting on Incentives That Haven't Been Adopted Locally

What people do wrong: Applicants read that their state offers a property tax exemption for solar and factor it into their financial model — without checking whether their local government has actually adopted it.

Why it costs you: In Alabama, the property tax abatement for renewable energy is a "local option" — local governments must affirmatively adopt it. If your county hasn't, you owe full property taxes on the added assessed value of your system. A residential solar installation adds roughly $15,000–$25,000 in assessed value; at a 1% effective property tax rate, that's $150–$250 per year in unexpected ongoing cost. In Alaska, municipal property tax exemptions for residential renewable energy systems are also optional — municipalities may exempt them but are not required to. Over a 25-year system life, assuming an exemption that doesn't exist could mean $3,750–$6,250 in unbudgeted taxes.

The fix:

1. Contact your county assessor's office directly and ask: "Has this county adopted a property tax exemption for residential solar installations?" Get confirmation before including it in your financial model.
2. The federal 30% Residential Clean Energy Credit (IRS §25D) is the one incentive you can count on without local verification — it runs at 30% through 2032, has no dollar cap, and applies in all five states covered here. Build your base case around that, then add local incentives only after confirming they're active.
3. If you're a local government, school, or non-profit in Alabama, separately investigate the Alabama Energy Division's Energy-Efficient Retrofits Program — that funding is real and available, but it's not a residential homeowner program.

Frequently Asked Questions

Why doesn't Alabama have a statewide solar permit standard?

Alabama's lack of a statewide solar permit standard allows local jurisdictions to establish their own rules, which can lead to inconsistencies across the state.

What laws apply to solar permitting in states without specific regulations?

In states like Alabama and Alaska, federal regulations and guidelines may apply, but local authorities ultimately govern the permitting process.

Are there any active legislative proposals regarding solar permitting in Alabama?

As of now, there are no widely known active legislative proposals aimed at establishing a statewide solar permit standard in Alabama.

What do residents in states without specific solar regulations typically do?

Residents often rely on local building departments to understand the specific requirements for solar permits, which can vary significantly by jurisdiction.

How does solar permitting in Alabama compare to neighboring states?

Unlike Alabama, neighboring states like Arkansas and Arizona have established permitting processes, often with specific requirements and timelines that can streamline the installation of solar systems.