Deck Ledger
The structural board that attaches a deck to a building and transfers deck loads into the supporting structure.
Applies to
Decks · Patios · Exterior work
Project example
A deck attached to a house needs ledger fasteners, flashing, and clearances that match the approved plans and local code.
Also called
Where this term shows up in permit work and how it affects the project
Ledger details are a common inspection focus and can separate an attached deck permit from a freestanding platform path.
If this term appears in a form, plan comment, or local ordinance, start with the building permit guide, compare it against the zoning permit guide, then use the permit guide directory to find the right local path.
Why deck ledger matters in a permit file
A deck ledger transfers loads from an attached deck into the existing building. Its safety depends on the house framing, sheathing, veneer, flashing, fastener type, spacing, edge distance, lateral connections, and water management; bolting a board to whatever is visible is not an approved design.
Where it appears in the permit process
Existing-building investigation
The designer verifies rim or band joist, floor framing, foundation, sheathing, siding or veneer, utilities, and whether the building can receive an attached ledger.
Attachment design
Ledger size, flashing, fasteners, spacing, stagger, clearance, lateral-load connections, joist hangers, and prohibited conditions are documented.
Plan review
The attachment is checked against prescriptive tables, product listings, or engineering and coordinated with the overall deck load path.
Framing inspection
Ledger, flashing, fasteners, hangers, lateral connections, bearing, and existing conditions remain visible for verification.
What you may need
- Deck framing plan and section at the house
- Existing rim, framing direction, veneer, siding, and foundation information
- Ledger, fastener, spacing, flashing, hanger, and lateral-connection details
- Connector and fastener manufacturer data
- Engineered design or freestanding alternative when prescriptive attachment is unavailable
Where to get it or verify it
- Use the adopted residential or building code and the AHJ's deck guide.
- Use connector, screw, and flashing manufacturer instructions for the exact materials and substrate.
- Use a structural professional when attaching to masonry veneer, cantilevers, open-web members, damaged framing, or other nonprescriptive conditions.
Common mistakes that create comments or delays
- Attaching a ledger through brick veneer without an approved system
- Using deck screws or unspecified fasteners
- Omitting flashing or creating a path for water into the house
- Covering the ledger and lateral connections before inspection
What to do next
- Expose or verify the existing attachment condition before final design.
- Choose a prescriptive, engineered, or freestanding support approach.
- Coordinate ledger, flashing, connectors, and the complete load path.
- Keep all critical attachment work visible for framing inspection.