What Is a Permit Set? Everything You Need to Know

Someone tells you "you'll need a permit set before you can build," and you nod like you understood, and then you go home and Google it because you actually have no idea what that means. You're not alone. It's one of those phrases everyone in construction throws around like it's obvious, and nobody stops to explain it to the person hearing it for the first time.

Here's the plain-language answer: a permit set — also called construction documents, a CD set, or a construction drawing set — is the complete collection of technical drawings and supporting documents that your building department requires before they'll issue you a building permit. Think of it as the official instruction manual for your project: it tells a builder exactly what to build, how to build it, what materials to use, and what every dimension should be, in a format precise enough for a government reviewer to check it against code. This article walks through everything it contains, why it exists, who creates it, and what happens to it after you submit it.

What is a permit set?

A permit set is production-ready, fully dimensioned, code-compliant technical documentation — not a sketch, not a mood board, not a 3D rendering of what your addition might look like. It's the version of your project that's detailed enough for a plan checker to verify structural soundness, code compliance, and zoning conformity, and detailed enough for a contractor to actually build from without guessing.

It's created by a drafter, a building designer, or a licensed architect, depending on your project's complexity and what your specific jurisdiction requires. Once complete, it gets submitted to your local building department, where a plan checker reviews it against applicable codes. If everything checks out (or once corrections are addressed), the department issues a building permit — the legal authorization to start construction. From there, your contractor builds from that same set, and inspectors check the work against it at various stages.

Why a permit set exists

Building departments need detailed drawings before approving a project because they have to verify a long list of things: that the structure is sound and won't collapse, that it meets local building codes for safety, energy efficiency, and accessibility, that it complies with zoning rules like setbacks and height limits, that there's adequate emergency egress, that utilities are properly planned, and that the design doesn't create problems for neighboring properties.

A permit set packages all of that into a standardized format a plan checker can actually review efficiently, sheet by sheet. Without it, building departments would be approving or rejecting projects based on sketches and verbal descriptions — which creates real legal liability for the city and real inconsistency in what gets approved. The permit set becomes the official record: this is exactly what was reviewed, and this is exactly what was approved.

What's in a typical permit set

The exact sheet list varies by project type and jurisdiction, but most residential permit sets include the following.

Site plan (also called a plot plan). Shows your property, existing structures, the proposed new structure or addition, setbacks from the property lines, easements, utilities, and a north arrow. This is usually the first thing a plan checker reviews, and it's where most rejections start — an inaccurate or missing site plan is one of the most common reasons a set gets sent back.

Floor plans. Show room layout, every dimension, wall locations, door and window placement with sizes, room labels, and square footage. Plan checkers use these to verify minimum room sizes, confirm egress windows exist where required, and check that bathroom fixtures meet clearance requirements.

Exterior elevations. Show what the building looks like from each side — front, rear, left, right — with heights, window and door placement, roofline, and materials. Used to verify height limits and, in some areas, design review standards tied to neighborhood character.

Building sections. A vertical slice through the structure showing floor-to-ceiling heights, roof structure, insulation, foundation depth, and wall assembly. Used for structural review, insulation compliance, and ceiling height verification — most jurisdictions require a minimum ceiling height (commonly cited around 7'6") for habitable space.

Foundation plan. Shows footing dimensions and the slab, basement, or crawlspace layout — the structural elements below grade. Used for structural and soil-bearing review.

Roof plan. Shows roof shape, pitch, drainage direction, and materials. Used for structural review and drainage compliance.

Door and window schedule. A table listing every door and window with size, type, and — where required — energy performance ratings. Used for both energy code compliance and egress verification.

Details. Enlarged drawings of specific connections or assemblies — wall sections, beam connections, stair details — giving the plan checker and inspector the specifics a floor plan alone can't communicate.

Depending on your project, you may also need: an electrical plan (outlets, circuits, panel schedule), a plumbing plan (fixture locations, supply and drain routing), a mechanical plan (HVAC equipment and ductwork), structural calculations (prepared and stamped by an engineer where required), and an energy compliance report (California's Title 24 or your state's equivalent standard).

For the full project-type-specific checklist — what you need for an ADU versus a bathroom remodel versus a garage conversion — see What Drawings Do You Need for a Building Permit?

Permit set vs. other confusing terms

Permit set vs. building permit. A permit set is the drawings you submit. A building permit is the legal approval you get back from the city. You submit a permit set, the city reviews it, and if it's approved, they issue you a building permit. One is the input; the other is the outcome.

Permit set vs. construction documents. These are the same thing — "construction documents" is the more formal, industry term; "permit set" is the everyday version people actually say out loud. See Permit Set vs Construction Set: Are They Different? for the full explanation.

Permit set vs. architectural drawings. "Architectural drawings" is the broader category. A permit set is one specific type of architectural drawing — the final, code-verified, production-ready version. Earlier in a project, you might see preliminary sketches, design development drawings (an early, less-detailed version), or 3D renderings meant purely to visualize the look of a space. A permit set is what those earlier stages lead to once the design is locked and ready for legal review.

Permit set vs. as-built drawings. A permit set is created before construction and shows what you plan to build. As-built drawings are created after construction and document what was actually built — which sometimes differs from the plan due to field conditions or changes made along the way.

What a permit set is not

Worth being direct about, since a few misconceptions cause real confusion:

• It's not a sketch or an early concept drawing.
• It's not a 3D rendering or visualization.
• It's not a budget or cost estimate — a permit set doesn't include pricing.
• It's not a construction contract between you and your builder.
• It's not the building permit itself — it's what you submit in order to get one.
• It's not optional. You legally cannot build without one in nearly every jurisdiction.
• It's not standardized nationwide — requirements vary meaningfully by city and county, which is the single most important caveat in this entire article. What your neighbor's city required may not match what yours requires.

Who creates a permit set

Three types of professionals prepare permit sets, and which one you need depends on your project's complexity and what your jurisdiction specifically requires.

Drafter (draftsman). Technical training through a certificate program or years of on-the-job CAD experience. No state license, and can't stamp drawings. Commonly $50–$150 per hour or $2,000–$8,000 as a flat fee. Best suited to straightforward projects — room additions, bathroom remodels, decks.

Building designer. Training varies — some have design degrees, some don't. May carry a voluntary certification but isn't a licensed architect. Whether they can submit residential permit sets independently depends on your jurisdiction. Commonly $100–$200 per hour or $5,000–$12,000 flat fee. Fits mid-complexity residential projects where some design input is useful but a full architect isn't necessary.

Architect. Licensed after 7+ years of education, internship, and a multi-part licensing exam. Can legally stamp drawings, certifying code compliance and taking on professional liability for the design. Commonly $100–$250 per hour, or 5–15% of construction cost, or a flat fee ranging from $8,000 to $50,000+ depending on project scope. Best suited to complex projects, new homes, and anything requiring genuine design expertise or a legally required stamp.

For the full comparison of what each one actually does differently — and where a hybrid approach fits in — see Draftsman vs Architect: Which One Do You Actually Need? and Architect vs Drafting Service: The Truth About Cost and Quality

The timeline: how long does a permit set take?

From the first meeting to submission, a typical permit set takes roughly two to six weeks, though this swings widely with project complexity.

Week 1 usually covers the initial meeting, understanding your project goals, and jurisdiction research — confirming zoning, setbacks, and code requirements for your specific address before any drawing starts.

Weeks 2 through 4 are where the drawings actually get built — floor plans, elevations, sections, and coordination with any structural engineer or MEP consultant the project needs.

Weeks 5 and 6 cover refinements, a final internal quality-assurance pass, and preparation of the complete package for submission.

Simple projects — a deck, a straightforward bathroom remodel — can move through this in as little as one to two weeks. Complex projects — a new home, a full ADU, anything with significant structural engineering — can run six to twelve weeks. The real variables are how clear your design vision already is, how quickly you make decisions along the way, and how many revision rounds you ask for before you're ready to submit.

What happens after you submit a permit set

Submission is the midpoint of the story, not the end of it. Here's the sequence that follows.

Plan check review. A plan checker at your building department reviews every sheet against applicable code — setback compliance, structural soundness, energy compliance, safety requirements. This commonly takes two to four weeks, though it varies by jurisdiction and project complexity.

Corrections letter, if needed. If anything is missing, unclear, or non-compliant, you'll receive a corrections letter (sometimes called plan check comments) listing every issue that needs to be resolved. You revise the drawings and resubmit. For a full walkthrough of how to handle this efficiently, see Plan Check Corrections: How to Respond and Get Approved Faster

Approval and permit issuance. Once every correction is addressed, the building department approves the set and issues your building permit — the legal green light to begin construction.

Construction. Your contractor builds from the approved permit set, and inspectors visit at defined phases (foundation, framing, electrical rough-in, and so on) to verify the work matches what was approved.

Final inspection. After construction wraps up, an inspector reviews the finished work against the permit set to confirm it was built as designed.

Certificate of occupancy. Once the final inspection passes, you receive a certificate of occupancy — official proof that the building is complete and legally habitable.

Now that you know what a permit set is

The vocabulary makes a lot more sense once you see the whole picture: a permit set is the technical documentation your project needs before you can legally build, it exists so the building department can verify safety and code compliance, and it becomes the reference document your contractor and inspectors use throughout construction.

The next real question is who should create yours. That depends on your project's complexity and what your specific city requires — see Draftsman vs Architect: Which One Do You Actually Need? for that decision, or How Much Do Permit Drawings Really Cost? if budget is the more pressing question right now.

If you're ready to move forward, we prepare complete, building-department-ready permit sets for residential projects. Send us your project type and location, and we'll tell you exactly what your jurisdiction requires. Start with permit drawing services.