What Deck Inspectors Look For in Monroe County, NY

Monroe County deck inspectors conduct two inspections: a footing inspection before concrete is poured (checking hole depth at 48 inches and soil conditions) and a final inspection after the build is complete (checking ledger attachment, railing height and baluster spacing, stair geometry, and structural connections). A failed inspection requires correction before occupancy — plan for inspection windows in your project schedule.

Key Facts

• Monroe County requires three deck inspections: footing inspection (before concrete pour, confirming 48" depth), framing inspection (before decking is installed), and final inspection (completed deck with railings and stairs)
• Footing inspection: inspector measures depth to confirm footings reach Monroe County's 48" frost line per IRC R403.1.4.1; shallow footings require excavation correction before any concrete is poured
• Framing inspection: inspector checks ledger flashing per IRC R507.2.4, joist hanger installation, hardware corrosion resistance, beam-to-post connections, and span compliance per DCA 6 span tables
• Final inspection: inspector verifies guard height (36" minimum per R312), baluster spacing (4-inch sphere test per R312.1.3), stair rise/run dimensions (R311.7), and handrail compliance
• Missing or improper ledger flashing is the most common framing inspection failure in Monroe County — inspectors look for continuous corrosion-resistant flashing at the full ledger width
• An un-permitted deck that has never been inspected can be flagged during a home sale inspection and may require remediation to obtain a retroactive permit
• Inspectors do not check material brands or aesthetics — their scope is structural and code compliance only

Monroe County building inspections are not bureaucratic checkboxes. The footing and final inspections for deck permits are the two moments when an independent engineer-trained official verifies that your structure will not collapse, heave, or become a liability. Here is exactly what they check at each phase.

Footing Inspection (Before Concrete Pour)

The footing inspection must happen before concrete is poured. Call Monroe County Building Department to schedule at least 48 hours in advance. The inspector typically arrives within 24–72 hours of the scheduled window.

What the inspector checks:

Hole depth: Every footing hole must extend to or below 48 inches — Monroe County's frost line. The inspector uses a depth probe or drops a measuring tape. Holes at 42–46 inches are common from contractors trying to shortcut. They fail.

Hole diameter: Minimum 10 inches for standard residential post loads. Larger decks with longer spans may require 12-inch or larger footings. The approved drawings specify the diameter — the inspector verifies it matches.

Soil conditions: The inspector visually assesses soil type. Soft clay soils (common in Greece and Irondequoit) may require larger diameter footings or a sonotube with a belled bottom to distribute load. Standing water in the hole requires pumping out and assessment of drainage before pour.

Number and placement: The inspector compares footing locations to the approved site plan. Footings in the wrong position fail even if the hole is the right depth.

What fails this inspection:

• Holes not at 48-inch depth
• Wrong diameter
• Soil conditions that do not match the assumed bearing capacity in the approved drawings
• Missing footings (contractor planned to add after inspection — inspectors are experienced with this)

Framing Inspection (Optional in Some Municipalities)

Some Monroe County municipalities conduct an intermediate framing inspection after the structure is framed but before decking is installed. This is your contractor's opportunity to show ledger attachment and structural connections. If your municipality requires it, do not install decking before this inspection.

What the framing inspector checks:

• Ledger attachment: Bolt diameter (minimum 1/2 inch), bolt pattern (IRC Table R507.2.3), stagger, and flashing installation. This is the most important structural check.
• Ledger flashing: Z-flashing or membrane flashing must be continuous, correctly lapped behind siding above, and extend over the ledger face. Inspectors probe at corners where flashing is cut.
• Joist hanger installation: Every joist hanger must be face-nailed with the correct nail count and size (joist hangers specify the nail type on the product label — inspectors know to look for the right nail diameter, not just any nail).
• Beam-to-post connection: Post caps or hardware must match the load requirements. Toenailing alone (a nail driven at an angle) is not permitted for beam-to-post connections in Monroe County.
• Blocking at beams: Blocking between joists at the beam prevents joist rotation under load — especially important for cantilevers.

Final Inspection

The final inspection occurs after all work is complete: decking installed, stairs built, railings up, all hardware in place.

What the final inspector checks:

Railing height: 36 inches above deck surface for decks up to 30 inches above grade; 42 inches for decks higher. Measured from deck surface to top of railing cap. Common failure: deck surface measurement taken wrong (from the joist, not from the decking surface).

Baluster spacing (sphere test): Every opening in railing balusters must be smaller than 4 inches (a 4-inch sphere cannot pass through). Inspectors carry a 4-inch ball. Openings that pass the ball fail the inspection. This includes the space between the bottom baluster and the deck surface.

Stair geometry: Rise and run measurements (4–7.75 inch rise, 10-inch minimum run), 3/8-inch maximum variance stair to stair. Handrail height 34–38 inches. Graspable handrail profile.

Post-to-deck connection: Railing posts that are surface-mounted (lag-bolted to the deck face or through the decking to the joist below) must meet IRC torque and spacing requirements. Post-to-deck connections are a frequent inspection failure because undersized hardware is common.

All work matching approved drawings: If you added a feature mid-build (extended the deck, added a stair, moved a railing opening for gate access), that change needs to be submitted for a drawing revision. Inspectors compare the finished structure to the approved plan.

Scheduling Inspections

Monroe County inspection scheduling: most municipalities use an online portal or phone scheduling system. Schedule at least 48 hours in advance for footing inspection (before pour) and 24–48 hours for final (after all work is complete). Inspectors do not wait — if your contractor is not ready, the window is forfeited and you reschedule.

Build inspection windows into your project timeline. Footing inspection typically adds 2–3 days to the start of framing. Final inspection must occur before the permit closes, which has a time limit (varies by municipality, typically 6–18 months from permit issuance).

Find Rochester deck contractors who manage permits and inspections →

Related Guides

• Deck Permit Monroe County Requirements →
• Ledger Board Failure: Why It Happens →
• How Deep Should Deck Footings Be in Western NY? →
• Why Deck Collapses Happen and How to Prevent Them →

Common questions this answers

• What do deck inspectors look for in Monroe County NY?
• What are the three deck inspection stages in Rochester?
• What fails a deck footing inspection in Monroe County?
• What does a deck framing inspector check in New York State?
• What does a final deck inspection check for in Monroe County?
• Can I sell my house with an un-permitted deck in Monroe County?
• What is the most common reason a deck fails inspection in Rochester?

Inspection checkpoints cited from the 2020 New York State Residential Code §R507 (decks), §R311.7 (stairs), §R312 (guards) and IRC 2021 corresponding sections. Footing depth from IRC §R403.1.4.1. Best-practice references: NADRA technical resources and American Wood Council DCA 6.