Permit Drawings and Shop Drawings: Who Draws What, When
By Martha Huk, Principal Designer and Project Lead - Last updated August 2026
Two families of drawings decide whether a project moves or stalls. Permit drawings get you legally onto the site. Shop drawings get the built work to match the design. Neither one ever appears in a glossy portfolio, yet between them they control most of the schedule risk a builder actually feels.
The cost of getting them wrong is measurable. A study of 1,362 projects found an average of 9.9 requests for information for every $1 million of construction cost, and pegged the combined review effort at about $1,080 per RFI (Navigant Construction Forum, 2013). Most RFIs are documentation questions in disguise. This guide covers what each set does, who produces it, and how a clean handoff between the two keeps crews building instead of waiting.
Key Takeaways
- Permit drawings prove code compliance to a plan reviewer. Shop drawings prove fabrication intent to the people making the parts. They answer different questions and they fail in different ways.
- Documentation gaps are expensive: projects average 9.9 RFIs per $1 million of construction, at roughly $1,080 in review and response effort each (Navigant Construction Forum, 2013).
- Permit review now runs on statutory clocks in some states. California requires plan-check comments back within 30 business days for housing projects of 25 units or fewer (California Building Officials, 2023).
- Millwork shop drawings carry more design intent per sheet than any other submittal, which is why a national standard, ANSI/AWI 0641, governs architectural casework quality (Architectural Woodwork Institute, 2020).
What Are Permit Drawings?
Permit drawings are the portion of the construction documents a building department reviews before issuing a permit. Their job is proving code compliance: structure, egress, fire separation, energy performance, and site placement. Virginia’s statewide code states the requirement plainly: construction documents “shall be submitted with the application for a permit” (Virginia Administrative Code 13VAC5-63-90).
Think of the permit set as a legal argument made in line weights. The reviewer isn’t judging the design. They’re verifying that the stair geometry, the structural spans, the glazing areas, and the mechanical loads all land inside the adopted code. Virginia’s rule, typical of US jurisdictions, also calls for a site plan drawn to scale showing the size and location of all proposed construction whenever the building official determines one is necessary.
A permit set isn’t the whole story, though. It’s a subset of the full documentation package, which we break down in our guide to what construction drawings actually are. The permit set answers the county. The full set answers the crew. Our design-to-build process treats them as two milestones of one documentation effort, not two separate products.
One boundary worth stating clearly: where a jurisdiction requires sealed sheets, that seal comes from a licensed professional. We prepare construction-ready documentation and work alongside your licensed professionals, so the set they review and the set the county reviews are complete the first time through.
What Belongs in a Residential Permit Set?
A typical US residential permit set includes a site plan, dimensioned floor plans, exterior elevations, building sections, structural framing plans and details, and energy code compliance documentation. Larger scopes add grading, drainage, and mechanical layouts. The exact list varies by jurisdiction, which is why the first drafting task is reading the local submittal checklist, not opening a template.
What does an incomplete set cost you? A correction letter, a resubmittal, and another trip through the queue. Review timelines now have real teeth in some states. Under California’s AB 2234, in effect since 2023, jurisdictions must return plan-check comments within 30 business days for projects of 25 homes or fewer, and within 60 business days above that (California Building Officials, 2023). A clock like that only helps if your application is complete enough to start it.
The permit set matters just as much on remodels and additions, where drawings must document existing conditions alongside new work. We cover that documentation problem in our guides to home additions that look original and running a luxury renovation in the right order.
What Are Shop Drawings, and Who Produces Them?
Shop drawings are fabrication-level documents produced by the trade that will actually make the work: the millwork shop, the steel fabricator, the window manufacturer, the stone supplier. They translate design intent into exact dimensions, materials, joinery, hardware, and tolerances, and the design team reviews them before anything gets cut.
Why does a second set of drawings exist at all? Because no design office knows a fabricator’s equipment, stock sizes, and shop practices better than the fabricator does. The construction documents say what the result must be. The shop drawings say how this particular shop will produce it, down to the fastener.
The review loop is the point. The fabricator drafts, the design team checks the drawing against design intent, and it goes back approved, approved as noted, or revise and resubmit. On a luxury home, expect shop drawings for custom millwork, steel and glass stairs, specialty doors and windows, stone tops, and the equipment racks behind a dedicated theater.
Permit Set vs Shop Drawings at a Glance
| Permit drawings | Shop drawings | |
|---|---|---|
| Primary audience | Plan reviewer and inspector | Fabricator, installer, site crew |
| Author | The design team | The trade or fabricator, reviewed by the design team |
| Question answered | Is this legal to build here? | Exactly how is this piece made and installed? |
| Level of detail | Code compliance and life safety | Fabrication tolerances, joinery, hardware |
| When produced | End of design, before application | After trade award, before fabrication |
| Typical failure mode | Correction letters and resubmittals | RFIs, remakes, field rework |
Keep this table in mind when a schedule slips. Permit problems cost you at the front of the job, before mobilization. Shop drawing problems cost you in the middle, when trades are stacked and every delayed answer idles someone expensive.
Why Do Millwork Shop Drawings Deserve Special Attention?
Millwork shop drawings carry more design intent per sheet than any other submittal on a luxury home. Dressing rooms, wine walls, paneled studies, and integrated vanities are defined almost entirely by casework, so the room’s success is decided during shop drawing review, months before installation. That’s why millwork earns its own standard and its own review discipline.
The industry treats this seriously enough to write it down. ANSI/AWI 0641, effective June 1, 2020, replaced Section 10 of the 2014 Architectural Woodwork Standards as the governing quality standard for architectural wood casework (Architectural Woodwork Institute, 2020). Specifying a grade from a national standard gives the shop, the builder, and the designer one shared definition of acceptable.
What should a complete millwork package show? Every elevation with plans and sections, species and finish callouts, hardware schedules, and clear flags where field dimensions are still pending. The rooms that depend on this most are the ones we detail in our guides to luxury closet design and wine room design, where a quarter inch of misread reveal is visible from the doorway.
A permit set answers the inspector’s questions. A shop drawing answers the fabricator’s. Confuse the two and you pay for the same information twice.
- Martha Huk, Principal Designer and Project Lead
How Does Shop Drawing Review Prevent RFIs?
Disciplined shop drawing review converts questions into answers before fabrication, which is exactly when answers are cheap. The alternative is the RFI stream. The same 2013 study found that projects between $5 million and $50 million averaged 17.2 RFIs per $1 million of construction cost, the highest rate of any size band studied (Navigant Construction Forum, 2013).
Sit with that number for a moment. Custom residential work lives in that band’s behavior: small teams, bespoke details, and compressed documentation budgets. The study put the median reply time to an RFI at 9.7 days. Ten days is a poured footing, a framed floor, or a millwork shop quietly moving your job behind someone else’s.
Prevention is procedural, not heroic. Keep one submittal log. Review for design intent within a stated turnaround. Route every answer back through the documents so the drawing of record stays true. That’s the discipline our construction management service runs on, and it’s the same standard we unpack in construction documentation services that prevent RFIs.
Who owns the loop matters as much as the loop itself. When design and construction sit inside one accountable team, review turnarounds stop being negotiations between strangers. We’ve written about that structural difference in design-build vs general contractor.
How Should a Builder Brief a Design Partner on Both Sets?
Name the deliverables before the contract is signed. A useful brief states which sheets the permit set includes, which trades owe shop drawings, who maintains the submittal log, and the review turnaround in business days. Vague documentation scopes produce vague documents, and vague documents produce RFIs.
What should you ask a prospective design partner? Ask to see a past permit set and a marked-up shop drawing review, not just renderings. Ask how they handle field dimensions on millwork. Ask what their documentation looks like at each phase, which we walk through in the custom home design process and our overview of architectural drafting services.
The answers tell you whether you’re buying drawings or buying documentation discipline. The first is a commodity. The second is what protects your schedule.
Frequently Asked Questions
Do permit drawings need to be sealed by a licensed professional?
That depends on the jurisdiction and the scope. Many US jurisdictions require sealed structural sheets on custom homes, while some exempt conventional light-frame construction. Where a seal is required, it comes from your licensed professionals. A design partner’s job is delivering documentation complete enough that their review is fast and clean.
How long does residential permit review take?
It varies by jurisdiction and by the completeness of your application. California now sets a statutory ceiling: plan-check comments within 30 business days for projects of 25 homes or fewer, and 60 business days above that (California Building Officials, 2023). Elsewhere, published targets range widely, and an incomplete submittal restarts the queue.
What’s the difference between construction drawings and shop drawings?
Construction drawings define design intent and code compliance for the entire project, and they’re what the permit application and the construction contract are built on. Shop drawings translate one trade’s scope into fabrication-ready detail after award. One is the project’s legal and technical baseline. The other is a specialist’s answer to it.
Who is responsible for dimensions on shop drawings?
The fabricator, as a matter of standard industry practice. The design team’s review checks conformance with design intent, while the shop verifies field dimensions and its own tolerances. That split is why a careful review response says reviewed for design intent rather than approved without qualification. Clear roles here prevent expensive remakes.
How many RFIs are normal on a custom residential project?
The broadest published benchmark found 9.9 RFIs per $1 million of construction across 1,362 projects, rising to 17.2 per $1 million on projects between $5 million and $50 million (Navigant Construction Forum, 2013). Documentation quality is the biggest lever a builder actually controls.
See the Documentation Behind the Rooms
The fastest way to judge a design partner’s documentation is to look at what it produces. Browse our portfolio of twelve projects documented in 146 renderings, filterable by room, and study the millwork-heavy spaces with shop drawings in mind. Every reveal you see had to be drawn before it could be built.
We’ve been designing and building since 2015. If you’re a builder or developer weighing a documentation partner, start a conversation and tell us what your last set of drawings failed to answer.
The Sets That Keep Projects Moving
Permit drawings and shop drawings are the two moments a project’s information gets tested by outsiders: first by the plan reviewer, then by the fabricator. Pass both tests on paper and the site stays quiet. Fail either one and the cost arrives as weeks, not just dollars.
The next step is simple to name and hard to fake: insist on a documentation process with owners, logs, and turnarounds, not a stack of sheets. See how we run permit sets, submittals, and shop drawing review as one accountable service on our construction management page.
Martha Huk is the Principal Designer and Project Lead at Hedgeford & Berkley, a design-build practice she founded in 2015. She worked as a design engineer at General Dynamics Land Systems specializing in thermal and fluid dynamics, and renovated homes for over a decade before combining the two. That engineering background is why the firm’s documentation reads like it was drawn by people who intend to build it.
