Maricopa County Development Services only has jurisdiction over unincorporated areas. If your address falls within Phoenix, Scottsdale, Mesa, Chandler, Gilbert, Tempe, Peoria, or any other incorporated city, your permit goes to that city's building department — not the county. Verify your jurisdiction at mcassessor.maricopa.gov before submitting.
Overview: Maricopa County's Solar Permit Process
Maricopa County processes residential solar permits through its Development Services Department and has invested significantly in streamlining the solar permit workflow over the past several years. Systems under 10kW that meet standard installation criteria are eligible for expedited review through the county's online portal, MyGovernmentOnline (MGO). This expedited track typically cuts approval time roughly in half compared to standard review.
The permit process in unincorporated Maricopa County follows the 2018 International Building Code (IBC), 2017 National Electrical Code (NEC), and the 2021 International Fire Code (IFC). The fire code setback requirements — particularly the 18-inch perimeter clear path and 36-inch hip-to-ridge access path — are among the most commonly misunderstood requirements and a frequent cause of permit revisions.
Quick Facts at a Glance
| Item | Detail |
|---|---|
| Authority Having Jurisdiction (AHJ) | Maricopa County Development Services |
| Permit Portal | MyGovernmentOnline (MGO) — mgo.maricopa.gov |
| Phone | (602) 506-3301 |
| Standard Permit Fee | $150–$400 depending on system size and valuation |
| Typical Approval Timeline | 5–15 business days (standard); 2–5 days (expedited under 10kW) |
| Code Basis | 2018 IBC, 2017 NEC, 2021 IFC |
| Inspections Required | 2–4 depending on scope (see below) |
| Primary Utilities | APS (Arizona Public Service) or SRP (Salt River Project) |
| Interconnection Timeline | 20–30 business days after final inspection |
| Net Metering Program | Arizona Corporation Commission — excess credited at avoided cost rate |
Required Documents for Your Permit Application
Maricopa County requires the following for a complete residential solar permit application. Your installer should prepare most of these, but knowing what's required helps you verify the package before submission and avoid delays from missing documents.
Mandatory for All Residential Solar Permits
- Completed permit application — available on MGO or at the Development Services counter at 501 N. 44th St., Phoenix.
- Site plan / plot plan — a to-scale overhead drawing of your property showing the location of your home and where panels will be placed on the roof. Must include north arrow, scale, property lines, and setback dimensions.
- Roof plan with panel layout — shows each panel's location on the roof surface, access pathways per IFC 2021 requirements, and the 18-inch perimeter clear space.
- Single-line electrical diagram (SLD) — a schematic showing the complete electrical system from panels through inverter to utility meter. Must identify all equipment by make and model.
- Equipment specification sheets — manufacturer data sheets ("spec sheets") for each piece of equipment: solar panels, inverter(s), racking/mounting system, and any disconnect switches.
- Load calculations — if you are upgrading your electrical panel or adding a sub-panel as part of the solar installation, load calculations are required.
- Permit fee — paid at time of submission. See fee schedule below.
Required for Systems Over 10kW
- Structural engineering letter or stamped drawings — a licensed Arizona structural engineer must certify that your roof structure can support the additional load of the solar array. Most modern roofs pass without modification; the engineer's letter is the documentation requirement.
- Electrical calculations — for larger systems, conductor sizing calculations and voltage drop analysis may be required.
Maricopa County's expedited solar permit track is available for systems that use pre-engineered racking (most residential systems qualify), are under 10kW DC, are flush-mounted (not ground-mounted), and do not require a panel upgrade. If your system qualifies, mark "Expedited Solar" on your application. Typical turnaround: 2–5 business days.
Permit Fees — 2025 Schedule
Maricopa County calculates solar permit fees based on the project valuation — typically the fair market value of the installed system including labor and materials. Fee estimates for typical residential systems:
| System Size | Typical Valuation | Estimated Permit Fee |
|---|---|---|
| Under 5kW | $10,000–$18,000 | $150–$225 |
| 5kW–10kW | $18,000–$30,000 | $225–$320 |
| 10kW–15kW | $30,000–$45,000 | $320–$400 |
| Over 15kW | $45,000+ | $400+ (contact Development Services) |
Additional fees may apply if a panel upgrade, sub-panel, or battery storage system is included. The fee schedule is updated periodically — verify the current rate at maricopa.gov/Development-Services before submitting.
The IFC Fire Setback Requirement — Most Commonly Failed
The 2021 International Fire Code — which Maricopa County adopted — requires specific clear pathways on residential solar arrays to allow firefighter roof access. This is the most frequently misunderstood requirement and the most common reason for permit revision or failed inspection.
What the Code Requires
- 18-inch perimeter setback: A clear, unobstructed path at least 18 inches wide must be maintained at all roof edges (eave, rake, and ridge sides) for all roof types.
- 36-inch hip-to-ridge access path: On hip roofs specifically, a 36-inch-wide clear path from the eave to the ridge is required, running perpendicular to the ridge. This path must remain unobstructed — no panels.
- Roof valleys: Panels may not be placed in roof valleys.
These requirements are not optional and cannot be waived. Your installer's roof plan must clearly show these setback dimensions. If the fire setbacks significantly reduce your available roof area, discuss this with your installer before permit submission — resizing the array is easier before the permit than after installation.
Required Inspections
Maricopa County requires the following inspections for a standard residential solar installation. Schedule all inspections through the MGO portal or by calling (602) 506-3301. Inspections are typically available within 1–3 business days of scheduling.
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Rough-In / Structural Inspection
Conducted after racking is installed but before panels are mounted. The inspector verifies that racking is properly anchored to rafters (not just sheathing), that lag bolt placement and torque are correct, and that flashing is properly installed at all roof penetrations. This inspection is sometimes called the "structural rough."
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Electrical Rough-In Inspection
Conducted after conduit, wiring, and disconnect are installed but before cover. The inspector checks wire sizing, conduit fill, grounding, and bonding. If your installation includes a battery storage system, additional review of the battery enclosure location and ventilation may occur at this stage.
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Final Inspection
Conducted after all installation is complete. The inspector verifies that panels match the approved equipment list, that the system is properly labeled (NEC 2017 requires specific labels at the main panel, inverter, and AC disconnect), and that all exposed wiring and connections are complete and protected. The inspector also walks the roof to verify IFC fire setbacks match the approved plans.
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Utility Meter Upgrade Inspection (If Applicable)
If your solar installation requires upgrading your utility meter base (often required for larger systems or older homes with undersized meters), a separate inspection with APS or SRP may be required before PTO can be issued. Your utility will coordinate this separately from the county process.
APS vs. SRP: Interconnection Application Steps
Maricopa County is split between two large electric utilities — Arizona Public Service (APS) and Salt River Project (SRP). Your interconnection process depends on which utility serves your address. To find out, check your electric bill or look up your address at each utility's website.
Arizona Public Service (APS) Interconnection
- Submit the APS Distributed Energy Resource (DER) Application at aps.com/solar. Your installer typically submits this.
- APS issues a Conditional Approval Letter (CAL) — this is not PTO. It means APS has reviewed the application and has no objection to proceeding.
- After county final inspection is complete, your installer submits the final inspection report to APS.
- APS schedules a meter upgrade or net meter installation (typically within 5–10 business days of receiving the final inspection report).
- APS issues Permission to Operate (PTO). You can now turn the system on.
APS timeline: 20–30 business days from final inspection to PTO under normal conditions.
Salt River Project (SRP) Interconnection
- Submit the SRP Customer Generation application at srpnet.com. Note: SRP does not offer traditional net metering — they use a Customer Generation Price Plan (CGPP) with different export credit rates than APS.
- SRP reviews the application and may request a pre-installation review meeting for systems over 10kW.
- After county final inspection, submit the certificate of completion to SRP.
- SRP installs a bidirectional meter (typically within 10–15 business days).
- SRP issues PTO. System can be turned on.
SRP timeline: 20–30 business days from final inspection to PTO. Note that SRP's export pricing structure differs significantly from APS — review the CGPP terms before installation if you are an SRP customer.
Both APS and SRP allow you to submit the interconnection application before the county permit is finalized. Submitting simultaneously can cut 2–4 weeks off your total timeline, since utility review runs in parallel with county review and installation rather than waiting until after your final inspection.
HOA Rights in Arizona
Arizona Revised Statutes § 33-439 is one of the strongest solar access laws in the country. Under this statute, any HOA provision that prohibits or unreasonably restricts the installation of solar energy devices is void and unenforceable. This means your HOA cannot deny your solar installation outright — but it can regulate certain aesthetic aspects.
What Arizona HOAs Can Do
- Require that panels be flush-mounted (not tilted or raised significantly above roof plane)
- Request that panels be positioned on the rear roof slope if it would not reduce output by more than 10% or add more than $1,000 to the installation cost
- Require the use of frames, clips, and visible components that match the color of the roof
What Arizona HOAs Cannot Do
- Prohibit solar panels outright
- Impose conditions that would reduce system performance by more than 10%
- Add more than $1,000 in cost to meet HOA aesthetic requirements
- Require unreasonable delays in the approval process
If your HOA denies your solar application or imposes unreasonable conditions, you can cite A.R.S. § 33-439 in writing. See our HOA Solar Rights guide for a template letter and next steps.
What If Solar Was Installed Without a Permit?
Unpermitted solar installations are more common than you'd expect in Maricopa County — particularly with systems installed before 2018 when permitting enforcement was less consistent. If you've purchased a home with existing solar and suspect it was never permitted, or if your installer skipped the permit, you have options.
Maricopa County offers a retroactive permit process. The system will be inspected as if it were a new installation, and any non-compliant elements will need to be corrected. The fee is typically 2x the standard permit fee for unpermitted work. More important: unpermitted solar can void your homeowner's insurance coverage for fire damage, create problems at resale (disclosure is required), and prevent you from obtaining net metering from APS or SRP — as both utilities require the final inspection report before issuing PTO.
Read our full guide: What Happens If You Install Solar Without a Permit.
Your Next Steps
If you're planning a solar installation in unincorporated Maricopa County:
- Confirm your jurisdiction at mcassessor.maricopa.gov (county, not city, building department)
- Get 2–3 installer quotes and verify each installer is licensed in Arizona (ROC license) and will pull the permit in your name
- Review the permit documents checklist with your installer before they submit
- Ask your installer to submit the APS or SRP interconnection application at the same time as the county permit
- Use our Permit Wizard to get a complete, printable checklist for your system size
Frequently Asked Questions — Maricopa County Solar Permits
Look up your parcel at the Maricopa County Assessor's website (mcassessor.maricopa.gov) and check the "Municipality" field. If it shows "Unincorporated" or blank, Maricopa County Development Services is your AHJ. If it shows a city name, go to that city's building department for your permit.
Yes. Maricopa County uses the MyGovernmentOnline (MGO) portal at mgo.maricopa.gov for permit applications, document uploads, fee payments, and inspection scheduling. Walk-in service is also available at 501 N. 44th St., Phoenix, AZ 85008 during business hours.
No — battery storage systems (like the Tesla Powerwall or Enphase IQ Battery) require a separate permit in Maricopa County. The battery permit covers the energy storage system's electrical connections and the battery enclosure requirements under the 2017 NEC Article 706. If your installer is adding storage at the same time as solar, confirm they are pulling both permits.
Under the 2021 IFC (adopted in Maricopa County), hip roofs require a 36-inch-wide clear path from eave to ridge — running perpendicular to the ridge — for firefighter access. This path must be completely free of panels. For gable roofs, the requirement is an 18-inch perimeter setback at all edges. Your installer must show these clearances on the roof plan submitted with the permit application.
Net metering programs are set by your utility, not the county. APS offers net metering to residential customers at the avoided cost rate (not the full retail rate). SRP customers are on the Customer Generation Price Plan (CGPP), which works differently — exported power is credited at a time-of-use rate. Review your specific utility's program terms before finalizing your system design, as export rates affect payback calculations significantly.