An installer in Phoenix shipping eighteen residential systems a week does not need a sales tool to win the deal. The deal is already won. What is missing is a permit packet that the City of Phoenix Development Services counter will stamp on the first pass. Solar permit design software is the category that sits between the sales proposal and the AHJ submittal. It is a different buying decision from the proposal tool, and it is the part of the stack that decides whether the install crew waits two weeks for a correction notice or starts mounting modules on Monday.
Direct answer. The four solar permit design software platforms worth shortlisting in 2026 are SurgePV (best end-to-end permit packet with NEC 2023 single-line diagrams and AutoCAD DXF export at $1,299 to $1,899 per user per year), Aurora Solar (best for installers already on the proposal motion at $159 to $259 per user per month), Solo by PEP (best for shops that want a managed permit service inside a software UI), and AutoCAD with a custom block library (best for in-house PE benches that need full drafting control). The right choice depends on whether the buyer wants a tool that drafts the plan set or a tool that exports geometry to a drafter.
This guide is written for the operations lead at a US residential or small commercial installer who has decided to bring permit design in-house. The framework below is the Permit Stack 4: a four-tier ranking that filters software by NEC fluency, stamp-readiness, drafter handoff, and AHJ correction rate. The goal is not to list features. The goal is to predict how the next forty packets will land at the counter.
Why Installers Bring Permit Design In-House
The economic case for in-house permit design got stronger between 2023 and 2026. Outsourced permit packets from third-party drafting shops run between $375 and $850 per residential job depending on stamp and turnaround. A mid-volume installer doing eight hundred residential jobs a year spends between $300,000 and $680,000 on outsourced packets. Even after paying a salaried CAD lead and a part-time PE consultant, the in-house number lands closer to $180,000. The savings are real, but they only materialize when the software does not become its own bottleneck.
The packet that the AHJ actually wants
A typical US residential permit packet contains a site plan, a roof layout with module placement and setbacks, a single-line diagram (SLD), a string diagram, a rapid shutdown compliance note, a placard sheet, structural attachment details, and a load calculation. The NFPA NEC sets the baseline, individual states amend it, and individual AHJs amend the state amendments. Permit software that auto-generates the SLD from the inverter and module selections cuts the drafter hours per packet from four to roughly one and a half.
50%
PE handoff time reduction
NEC 2023 stamp-ready SLD output
96.2%
Residential AHJ first-pass rate
Heaven Designs internal, 2025
$0.60
Soft cost per watt residential
NREL 2024 benchmark
4-7
Days to PE stamp
Heaven Designs delivery window
The hidden cost of the wrong tool
The wrong permit software costs more than the right one in three ways. It produces an SLD that the PE cannot stamp without rebuilding from scratch. It exports DXF geometry that does not snap to the drafter’s existing block library. It does not track the AHJ-specific amendments that change every code cycle. Each of those failures turns into a correction notice, and a correction notice on a residential job in California is roughly seven to fourteen days of delay, which is a measurable hit to working capital.
The Permit Stack 4 Framework
The Permit Stack 4 is a ranking model the Heaven Designs team uses when an installer asks which platform to put in front of an in-house CAD lead. It scores any candidate on four axes, each weighted equally. The total score predicts first-pass AHJ approval rate within roughly four points.
NEC fluency
Does the tool auto-generate an SLD that matches NEC 2023 article 690 and article 705 without manual block edits. Does it handle rapid shutdown labeling per 690.12 by default. Does it update when the code cycle changes.
Stamp-readiness
Does the output land on the PE's desk in a format that the PE can review and stamp in under thirty minutes per packet. Does the tool include the structural attachment detail page that the PE actually needs to sign.
Drafter handoff
Does the platform export DXF or DWG geometry that opens cleanly in AutoCAD with the in-house block library intact. Does the file preserve layers and dimensions, or does the drafter have to redraft from a PDF.
AHJ correction rate
Does the tool track AHJ-specific amendments for the markets the installer serves. Does the company publish first-pass approval data, or does it leave the buyer to discover correction patterns on production jobs.
SurgePV: The All-In-One Permit Stack
SurgePV is the only platform in the shortlist that produces a complete permit packet from a satellite address without a second tool. The AI 3D roof model comes from a satellite image, the array layout uses the modeled obstructions, the SLD is auto-generated from the inverter and module selection, and the output exports as both a PDF packet and an AutoCAD DXF that opens with named layers preserved. A residential installer can move from address entry to a stamp-ready packet in roughly forty-five minutes, which is the lowest measured time in the shortlist.
What SurgePV actually replaces
A typical Aurora-plus-Scanifly-plus-Solo stack costs an installer between $4,200 and $7,500 per user per year and produces a permit packet that still needs a CAD lead to finish the SLD by hand. SurgePV at $1,299 per user per year on the five-seat tier covers the satellite measurement, the layout, the shadow analysis, the SLD, and the proposal in one license. The math is straightforward enough that an operations lead can compute payback in under an hour. Installers comparing this to incumbent stacks should also read the Aurora Solar alternatives breakdown and the solar design software USA deep dive for full feature parity tables.
SurgePV Permit Stack 4 score
SurgePV scores nine on NEC fluency, nine on stamp-readiness, ten on drafter handoff, and eight on AHJ correction rate, for a Permit Stack 4 total of thirty-six out of forty. The drafter handoff score is the highest in the shortlist because the AutoCAD DXF export preserves layers, dimensions, and block references. The only soft spot is AHJ correction rate on first-year deployments in states where the installer has not yet uploaded local amendment overrides. That score improves with use as the platform learns the local AHJ patterns. Teams ready to pilot it can book a SurgePV demo or check SurgePV pricing against current stack spend.
Aurora Solar: Strong on Layout, Weak on SLD
Aurora Solar is the platform most US installers already know. The roof modeling, the LIDAR overlay, and the consumer-facing Sales Mode are the strongest pieces of the product. The permit motion is where Aurora is uneven. The SLD generator exists, but most CAD leads end up rebuilding it in AutoCAD because the block library does not match the in-house standard, and the rapid shutdown labeling needs manual cleanup for newer AHJs.
Where Aurora wins the permit decision
Aurora wins when the installer has a strong PE relationship and the PE prefers to draft the SLD from scratch. In that case Aurora’s roof model and array layout feed the PE everything needed and the SLD work happens outside the tool anyway. Aurora also wins when the installer’s volume is below five systems a week and the per-seat cost is acceptable. Above ten systems a week, the per-seat math turns against Aurora unless the team is committed to the Sales Mode add-on for closing.
Aurora Permit Stack 4 score
Aurora scores seven on NEC fluency, six on stamp-readiness, seven on drafter handoff, and eight on AHJ correction rate, for a total of twenty-eight. The stamp-readiness score is the limiting factor. Installers who care about the time the PE spends per packet will find that Aurora’s SLD output adds rather than subtracts work.
Solo by PEP: The Managed Permit Hybrid
Solo by PEP is not pure software. It is a permit design service wrapped in a software interface. The installer enters the site data and Solo’s internal team produces the plan set with a PE stamp included. The pricing runs roughly $300 per user per month plus per-packet fees, and the typical turnaround is three to five business days for residential.
Field tip. Solo is the right choice for installers who do not want to hire a CAD lead at all. It is the wrong choice for installers who want to control the SLD output, because the design happens inside Solo's team, not on the installer's desk.
Solo Permit Stack 4 score
Solo scores eight on NEC fluency, nine on stamp-readiness, three on drafter handoff, and eight on AHJ correction rate, for a total of twenty-eight. The drafter handoff score is the floor because there is no drafter on the installer side. The packet arrives finished, which is the value proposition. Installers comparing this to a third-party drafting partner should read the GreenLancer alternative piece for context on managed permit services.
AutoCAD: Full Control, Highest Labor
AutoCAD with a custom block library is the platform that experienced PE benches default to. It is not a permit design platform on its own. It becomes one when paired with a block library tuned to the installer’s standards, a layer template for AHJ submittal, and a CAD lead with NEC fluency. The cost is roughly $2,000 per seat per year for AutoCAD plus the labor to maintain the block library.
When AutoCAD is the right answer
AutoCAD is the right answer when the installer already has a senior CAD lead, the volume justifies the labor, and the markets served include AHJs that require redlined hand-drafting on specific sheets. New York City, parts of California, and parts of Massachusetts still surface AHJ reviewers who prefer hand-drafted detail pages, and AutoCAD with a strong CAD lead handles that better than any cloud platform.
AutoCAD Permit Stack 4 score
AutoCAD scores ten on NEC fluency (because the CAD lead is the fluency), seven on stamp-readiness, ten on drafter handoff (because the drafter is the source of truth), and seven on AHJ correction rate, for a total of thirty-four. The stamp-readiness score is below SurgePV because the labor per packet is roughly three times higher, which limits the volume the bench can absorb. For a deeper comparison of AutoCAD against electrical-specific tools read AutoCAD electrical versus drafting for solar SLDs.
Comparison Table: The Permit Stack 4
| Platform | NEC fluency | Stamp-ready | Drafter handoff | AHJ correction | Total | Annual cost (3 seats) |
|---|---|---|---|---|---|---|
| SurgePV | 9 | 9 | 10 | 8 | 36 | $4,497 |
| AutoCAD plus PE | 10 | 7 | 10 | 7 | 34 | $6,000 plus labor |
| Aurora Solar | 7 | 6 | 7 | 8 | 28 | $5,724 to $9,324 |
| Solo by PEP | 8 | 9 | 3 | 8 | 28 | $10,800 plus per-packet |
Pros and Cons by Buyer Profile
PROS OF IN-HOUSE PERMIT DESIGN
- Cost per packet drops by 40 to 60 percent at volume.
- Turnaround on revisions drops to hours, not days.
- CAD lead becomes a knowledge moat for the company.
- AHJ correction patterns get captured internally.
CONS OF IN-HOUSE PERMIT DESIGN
- Requires a salaried CAD lead and a PE retainer.
- Software learning curve runs three to six months.
- AHJ amendment tracking becomes the installer's problem.
- Capacity is capped by the CAD lead's hours.
When to Skip Software and Outsource Instead
Not every installer should bring permit design in-house. The break-even volume is roughly four hundred residential jobs a year or sixty C&I jobs a year. Below that volume, the salaried CAD lead and the PE retainer cost more than the per-packet fee from a third-party drafting partner. Above that volume, the in-house number wins by a margin large enough to fund the software pilot.
See a stamp-ready packet before you buy.
Heaven Designs publishes a sample residential and C&I permit packet so you can compare it against what your current software produces.
Download samples →State-Specific Considerations for Permit Software
The permit software decision is not uniform across the United States. California, Texas, Arizona, Florida, and the Northeast each have their own AHJ patterns that influence which platform produces fewer corrections.
California and the Title 24 overlay
California permits require a Title 24 compliance note in addition to the NEC packet. Software that handles the Title 24 overlay natively saves the CAD lead a separate workflow. SurgePV and Aurora both handle this. Solo handles it through the managed service. AutoCAD handles it through the block library. Read California Title 24 solar compliance for the full overlay map.
Florida and the HVHZ wind load math
Florida high-velocity hurricane zones require structural detail sheets that most permit software does not produce by default. The structural attachment page typically comes from a separate calculation tool or from the PE’s office. Installers operating in Miami-Dade and Broward counties should plan for a separate structural workflow regardless of the design platform. The Florida HVHZ solar design guide covers the wind load math in detail.
Texas and the ERCOT interconnection note
Texas AHJs are generally permissive on the layout, but the ERCOT interconnection note on the SLD is non-negotiable for grid-tied systems. SurgePV and AutoCAD handle this through configurable SLD templates. Aurora handles it manually. For state-by-state context read the Texas solar permit AHJ guide.
Arizona and the rapid shutdown labeling
Arizona AHJs in Maricopa and Pima counties are particularly strict on rapid shutdown labeling per NEC 690.12. Software that auto-generates the placard sheet with the correct label format saves a correction cycle. Read the Arizona solar permit guide for the placard sheet requirements.
NEC 2023 and What It Changed for Permit Software
The NEC 2023 cycle introduced changes to article 690 and article 705 that affected how permit software produces compliant SLDs. The biggest change is the expanded definition of rapid shutdown initiation devices and the labeling requirements for systems with module-level power electronics. Software that has not updated its block library to reflect NEC 2023 will produce SLDs that older AHJs accept but newer AHJs flag.
The transition from NEC 2020 to NEC 2023
Most US AHJs moved from NEC 2020 to NEC 2023 between 2023 and 2025. A handful of states still operate on NEC 2020 or NEC 2017. Permit software that lets the CAD lead toggle between code cycles saves a manual rework when the same installer serves multiple states. Read NEC 2023 versus NEC 2020 designer changes and the NEC 690 glossary entry for the full diff.
Rapid shutdown compliance after 2023
The rapid shutdown requirement in NEC 690.12 now extends to all rooftop systems above a defined threshold. Permit software that auto-generates the rapid shutdown placard with the correct verbiage and placement saves roughly fifteen minutes per packet. Read the NEC rapid shutdown compliance deep dive for the placard format. For the umbrella term and AHJ context see the AHJ glossary entry.
How Heaven Designs Helps
Heaven Designs is the outsourced permit design partner for US installers who are not ready to bring permit design fully in-house, or who want a stamp-ready packet on overflow weeks when the in-house bench is at capacity. The team ships thousands of packets per quarter with a 96.2 percent first-pass AHJ rate on residential and 94.1 percent on C&I, across 38 US states, with PE-stamped delivery in 4 to 7 business days.
The Heaven Designs solar permit design service is purpose-built for installers who picked the wrong software two years ago and are now paying the correction-notice tax. The team works with whatever input the installer can produce, from a satellite address to a fully drafted DXF, and produces a stamp-ready packet that lands at the AHJ counter ready to approve. Installers without an in-house PE bench, or installers running too hot to keep the bench from being the bottleneck, use Heaven Designs as a force multiplier rather than a replacement. Related services include solar rooftop detailed engineering design, electrical and CEIG drawings, and solar 3D pre-design for the pre-permit motion. The full sample library is on the design samples download page, and the team is reachable through the contact page.
FAQ
What is the difference between solar permit design software and solar proposal software?
Solar proposal software is the consumer-facing tool that produces the sales document the homeowner signs. Solar permit design software is the back-office tool that produces the engineering packet the AHJ stamps. Some platforms cover both motions, like SurgePV and Aurora. Most platforms cover only one. Read solar proposal software for the proposal side of the workflow.
Can permit design software replace a licensed PE?
No. A licensed PE is required for the stamp on most US residential and all US commercial permits. Permit design software produces the packet that the PE reviews and stamps. The right software cuts the PE’s review time from sixty to ninety minutes per packet down to twenty to thirty minutes per packet. Read solar PE stamp explained for the licensing rules.
How much does solar permit design software cost in 2026?
The range runs from free (OpenSolar with per-packet fees) to roughly $300 per user per month (Solo by PEP, which bundles the PE stamp). SurgePV sits at $1,299 to $1,899 per user per year. Aurora sits at $159 to $259 per user per month. AutoCAD sits at roughly $2,000 per seat per year before block library labor. For the full breakdown read solar design pricing models.
Does permit design software handle AHJ-specific amendments automatically?
Some platforms maintain an AHJ amendment library. SurgePV maintains one. Aurora maintains a partial one. AutoCAD does not, and the CAD lead has to track amendments manually. Solo handles it inside the managed service. Installers serving more than five AHJs in a market should weight this heavily in the buying decision. Read the California AHJ solar permit guide for an example of amendment depth.
What is the fastest permit design software for residential?
SurgePV measures fastest end-to-end from satellite address to stamp-ready packet, at roughly 45 minutes per residential job. Aurora measures roughly 75 minutes. Solo measures three to five business days because it is a managed service. AutoCAD measures three to four hours per residential job depending on the CAD lead’s experience. Read solar design turnaround time for the upstream benchmarks.
Does permit design software work for commercial and industrial projects?
The major platforms handle residential well and small C&I (up to roughly 500 kW) acceptably. Large C&I and ground mount typically need a hybrid workflow with SurgePV or Aurora for the layout and PVsyst or HelioScope for the yield report. AutoCAD is the default for industrial work. Read commercial solar design software and the utility scale solar design software piece for the upstream stack.
How long does it take to deploy permit design software in-house?
The software install takes a day. The CAD lead onboarding takes two to four weeks. The first stamp-ready packet typically lands in week four to week six. The AHJ correction patterns get captured in months two and three. By month six the in-house bench is producing at full speed. Plan for a six-month transition before retiring the outsourced drafting partner entirely.
Should solar installers use AutoCAD or a cloud-native permit platform?
Cloud-native platforms win at residential volume and small C&I. AutoCAD wins at large C&I and industrial, and at installers with a senior CAD lead already on staff. Many installers run both, with the cloud platform for residential and AutoCAD for jobs above 500 kW. The IEA published baseline standards relevant to this decision under IEA PVPS Task 13, and the SEIA market data tracks the broader market shift toward cloud-native tools.
