How to Design a Permit-Ready Deck Plan in ArchiMaster 3D

A building inspector will reject a beautiful 3D render faster than a hand-drawn sketch if it lacks beam size callouts, footing depths, and guardrail dimensions. The fastest way to design a permit-ready deck plan in 2026 is to model the real framing in ArchiMaster 3D, set joist spacing and post heights, then export a dimensioned plan view and a side elevation with height callouts for the permit counter. You do not need a separate CAD program: the deck you model becomes the plan set. This guide walks through that workflow in the Landscape & Deck edition, from code constants to the two sheets inspectors actually read, then links the board-layout and takeoff steps that finish the submission.

• A permit-ready deck plan is a framing drawing first: joist size and spacing, beam span, post support, footing depth, and ledger attachment must be dimensioned before any deck board selection.
• ArchiMaster 3D's deck objects are real framing members. A joist spacing setting of 12, 16, or 24 inches on center carries into the plan and elevation views you export.
• Set local code values before modeling. Live load, frost depth, guardrail height, and local span tables control most dimensions on the permit set.
• Two sheets carry most residential deck permit reviews: a dimensioned plan view and a side elevation with height callouts.
• The same model can generate a board layout and lumber takeoff so the material list agrees line for line with the plan.

Why Most Deck Designs Fail Permit Review

Most residential deck plan rejections in 2026 come down to the same handful of omissions: no framing plan, missing ledger attachment details, underspecified footings, and guardrail height not called out. A render showing composite boards and a pergola does not tell a plan reviewer whether the deck is attached to the house with structural screws, whether the beam is a doubled 2x10, or whether the footing reaches below frost depth. The International Residential Code's prescriptive deck provisions require the plan to state joist size and spacing, beam span, post support, and connection hardware. A permit-ready plan is therefore a dimensioned framing drawing first and a design presentation second. When the plan answers those structural questions in the same view, the review moves faster and the builder gets fewer correction notes.

Start With the Deck Frame, Not the Deck Boards

The 3D home design workflow in ArchiMaster 3D reverses the common mistake of designing the deck surface before the support system. Open the Landscape & Deck edition, set the deck perimeter, then assign the structural ingredients: ledger board against the house, beam lines, post spacing, and joist direction. Think of the deck as a floor system, not a patio. The joists carry the deck boards; the beams carry the joists; the posts carry the beams; the footings carry the posts. If any one layer is skipped in the model, the plan set will be incomplete. A permit reviewer reads the drawing from the ground up, so model from the ground up too.

Set Code Constants Before You Draw

Before placing any deck object, record four numbers that control nearly every dimension on the sheet. First, the live load: the IRC prescriptive deck tables use 40 psf live load and 10 psf dead load, but some local jurisdictions require snow loads of 60 psf or more. Second, frost depth: footings must bear below it, which can be 12 inches in a warm coastal county or 48 inches in a northern climate. Third, guardrail height: 36 inches above the deck surface for residential decks under the IRC, with riser and opening limits that reject a 4-inch sphere. Fourth, joist and beam span tables from the local building code, not a generic internet chart. Enter these as project settings and text callouts in ArchiMaster 3D so every view carries the same assumptions.

Model Footings, Posts, Beams, and Ledger Correctly

A deck plan is a load path drawing. In ArchiMaster 3D, place the ledger at the correct elevation, then set post locations and assign footing diameters from the code table. The post does not sit on a slab; it sits on a concrete pier that extends below frost depth. The beam either sits in a notched post or on a post cap connector, and the plan must say which. The ledger attaches with 1/2-inch lag screws or through-bolts in a staggered pattern, commonly 16 inches on center, through the band joist or solid blocking. Never call out a ledger attached to brick veneer or a cantilevered floor overhang; the IRC forbids both. Model the connection hardware as named objects rather than decorative caps, and dimension each connection in the plan view.

• Joist size and spacing, with span and wood species
• Beam size, ply count, and post-to-beam connector
• Post size and spacing with footing diameter and depth
• Ledger attachment type, fastener diameter, spacing, and blocking detail
• Guardrail height of 36 inches minimum and stair rise and run

Generate the Two Permit Sheets Inspectors Actually Read

A permit submission for a residential deck does not have to be a 12-sheet architectural set. In most jurisdictions, two ArchiMaster 3D exports carry the job: a dimensioned plan view and a side elevation with height callouts. The 3D render is supplemental; the 2D views are the contract. ArchiMaster 3D's print-to-scale tools let you export the same model as a top-down plan with measurements, then switch to a front or side orthographic elevation and add vertical dimensions to the ledger, beam, guardrail, and stair landing. Keep the render on a cover page, not the plan sheet.

Dimensioned Plan View

The plan view shows the deck perimeter, house wall, ledger location, joist direction with arrows, joist spacing, beam lines, post centers, and footing circles. Dimension from the house to the first beam, between beams, and from the outside joist to the post centerline. A note block should list the ledger attachment, joist hangers, beam connectors, and footing schedule. If the deck has stairs, the plan marks the stair stringer attachment and landing size. The dimension string is what an inspector checks against the span table, so set ArchiMaster 3D to display exact distances, not the rounded interior dimensions.

Side Elevation With Height Callouts

The elevation gets the deck through the height and guardrail review. Set the elevation to show the footing below grade with a dashed frost-depth line, concrete pier height, post height, beam depth, joist depth, deck board thickness, and guardrail height above the deck surface. Call out the stair riser maximum of 7 3/4 inches and tread minimum of 10 inches as a note. For sloped yards, use the slope deck workflow to set stepped footings and beam heights, then lock those heights into the elevation before printing.

“Inspectors do not approve renders; they approve dimensions, connections, and clearances.”, ArchiMaster 3D Journal

From Permit Plan to Board Layout and Lumber Takeoff

Once the framing plan and elevation are clean, the same model produces the two documents a contractor needs on site: a board layout and a lumber takeoff. ArchiMaster 3D's board layout tool spaces deck boards with the manufacturer's gap, staggers the joints, and flags offcuts under the threshold you set. The takeoff counts joists, beams, posts, rim boards, decking, railing, and hardware. See the full method in Plan Deck Boards and Lumber Takeoff in ArchiMaster 3D. The permit plan and the material list then agree line for line, which reduces the change-order surprises that happen when a pretty render meets a lumber yard.

Deck Permit Questions, Answered