Plan set vs. permit set: the same document, and how it differs from a proposal

If you have started a solar project, you have probably heard "plan set," "permit set," "permit package," and "PV plan set" used almost at random. It is confusing because they all describe the same thing. This guide clears up the terminology, walks through the sheets that document contains, and separates it cleanly from a sales proposal and from as-built drawings, which are genuinely different documents.

The names are all the same document

Let us settle it first: plan set, permit set, permit package, PV plan set, and construction drawings are interchangeable terms for one deliverable. It is the technical drawing package an installer submits to the Authority Having Jurisdiction (AHJ) to obtain a building permit for a solar installation. Different companies and regions favor different names, but a reviewer treats them identically. When someone asks for your "permit set" and someone else asks for your "plan set," they want the same PDF.

The only meaningful distinction is context. "Permit set" emphasizes the purpose (getting the permit); "plan set" emphasizes the format (a set of plans). The content does not change.

What sheets a permit set contains

A residential permit set is organized as a sequence of sheets, each answering a specific question a plan reviewer will ask. A typical set includes:

For a sheet-by-sheet walkthrough, see what is in a solar permit set, or explore the interactive permit-set anatomy that lets you inspect a real set page by page.

How it differs from a sales proposal

The document most often confused with a permit set is the sales proposal, and the two serve opposite audiences. A proposal is built to sell: it shows estimated annual production, financing options, monthly savings, panel counts, and a rendering of the array. It persuades a homeowner. It is not code-compliant, it is not stamped, and no building department will accept it as a permit application.

The permit set exists to satisfy a plan reviewer. It contains no pricing, no savings math, and no marketing. It contains code citations, dimensions, electrical calculations, and structural details. A proposal often becomes the starting point for a permit set, since it establishes the intended layout, but the permit set adds all the engineering and compliance a reviewer requires. If you want to understand the sales document side, read reading a solar proposal.

The practical takeaway: never submit a proposal for a permit, and never assume a proposal proves the system is code-compliant.

How it differs from as-built drawings

The other document people confuse with a permit set is the as-built. The difference is timing. The permit set is the design before construction: it is what the AHJ approves so work can begin. As-builts are updated drawings produced after installation, reflecting what was actually built if the field crew deviated from the approved plans.

Some AHJs require as-builts at final inspection, especially when the installation differs from the permitted design. They are a record of reality, not a request for approval. Our guide to solar as-built drawings covers when they are needed and how to produce them.

Who prepares and stamps it

Permit sets are prepared by the installer's design team or a specialized design service. The critical question is whether a licensed professional engineer (PE) stamp is required. That depends entirely on the AHJ and the project. Many residential systems qualify for a prescriptive path where standard details are accepted and no stamp is needed. Others, because of roof type, system size, or local policy, require a wet-stamped structural sheet, and sometimes a stamped electrical sheet as well.

Because requirements vary so much, a permit set that sails through one jurisdiction can be rejected in another for a missing stamp or detail. Understanding why solar permits get rejected helps you build a set that clears review the first time.

Build a compliant set

Whatever you call it, the goal is one code-correct, complete package a reviewer approves without corrections. To scope a project fast, run the free instant estimate; to assemble the actual sheets, use the app; and to see exactly what a finished set looks like, walk through the permit-set anatomy. Naming aside, a clean permit set is the document that turns a signed contract into an approved, installable project.

Educational reference, reviewed 2026-07. A design aid, not a substitute for a licensed electrician or PE. Confirm the enforced NEC edition and local amendments with your AHJ.