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Freshly framed ADU with exposed studs and golden-hour light raking through parallel shadows on the subfloor, main house visible beyond

ADU Pre-Inspection · California

Every Stud,
Every Setback,
Before the City Arrives.

One inspector. Laser setbacks, joist hangers, Title 24 — checked before your correction notice becomes a stop-work order.

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340+ADUs inspected
97%Pass first city review
48hReport turnaround
IRC · Title 24Code authority

Finding 01

Fire Blocking & Joist Hangers

The most-cited framing violation in California ADU inspections — invisible once sheathing goes on.

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Exposed wood framing of ADU wall showing missing fire blocking between floor and ceiling intersection, raw lumber without proper fire-stopping material
Before · Deficiency
IRC R302.11Fire blocking gap — 14-inch opening between floor and ceiling
Corrected ADU framing with fire blocking properly installed at floor-ceiling intersection, code-compliant lumber placement visible
After · Code Compliant
IRC R502.6Joist hanger installed — nail schedule confirmed
Flagged

Fire blocking absent at floor-ceiling intersection, north wall bay 3. IRC R302.11 requires horizontal blocking at max 10-ft intervals in combustible construction.

Resolved

2×6 flat blocking installed between studs at floor line. Joist hanger nail schedule verified — 10d nails at 3-in o.c. per manufacturer spec.

Finding 02

Beam Sizing & Shear Walls

Structural findings that a city inspector may approve on paper — until the PE review catches the span table error.

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Interior ADU framing showing undersized ridge beam spanning 14 feet without adequate support, exposed rafters and structural members visible
Before · Deficiency
IRC R802.4Undersized ridge beam — 9¼ depth insufficient for 14-ft span
Corrected structural framing with properly sized LVL beam installed, engineered lumber visible with manufacturer stamps, adequate bearing points on each end
After · Code Compliant
IRC R802.4LVL 3½×11¼ confirmed — PE stamp on file
Flagged

LVL ridge beam 3½×9¼ insufficient for 14-ft clear span under 30 PSF snow load. IRC Table R802.4.1 requires minimum 3½×11¼ or PE-stamped alternative.

Resolved

Beam upsized to 3½×11¼ LVL. PE letter on file confirming span and load path. Bearing plates added at each end per structural drawings.

Finding 03

Title 24 Ventilation & Insulation

Energy code violations that sail through framing inspection — and fail final. Caught here, they cost $400. Caught at final, they cost a month.

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ADU attic framing showing undersized eave vents with insufficient net free area, compressed insulation batts not in contact with roof sheathing
Before · Deficiency
Title 24 §150.0(o)Vent ratio 1:375 — 40% below minimum required
Corrected ADU attic with properly sized continuous soffit vents installed, insulation batts properly placed in contact with sheathing meeting Title 24 requirements
After · Code Compliant
Title 24 §150.1(c)Continuous vent strip — ratio now 1:140, compliant
Flagged

Eave vent net free area measures 1:375 ratio — 40% below Title 24 §150.0(o) requirement of 1:150. Insulation R-15 batts compressed to R-11 effective at eave.

Resolved

Continuous soffit vent strip added, achieving 1:140 ratio. Insulation baffles installed — R-15 batts now in full contact with sheathing at eave line.

Inspection Report · Sample

What you receive
within 48 hours.

PDF · Typed · Timestamped

Permit Inspection Services

Pre-Inspection Report · ADU Framing & Energy

RPT-2026-0847

February 24, 2026

Property

2847 Mesquite Canyon Dr, Riverside, CA 92503

Stage

Framing — Pre-Sheathing

Inspector

M. Callahan · CA HVI #24-0193

Findings Summary

F-01North wall, bay 3Missing fire blocking at floor-ceiling intersection per IRC R302.11
FlaggedIRC R302.11
F-02Ridge beam, center spanLVL beam undersized for 14-ft clear span — requires PE letter or upsized to 3½×11¼
FlaggedIRC R802.4
F-03South wall, window rough openingKing stud trimmer count insufficient for 4-ft opening width
FlaggedIRC R602.7
F-04Attic, eave ventsNet free area 40% below Title 24 ventilation ratio requirement
FlaggedTitle 24 §150.0(o)
F-05Bathroom, exterior wallR-15 batts compressed to R-11 effective — insulation not in contact with sheathing
AdvisoryTitle 24 §150.1(c)
F-06Subfloor, perimeterJoist hangers installed — nail schedule complete, bearing confirmed
PassIRC R502.6
F-07Foundation sillAnchor bolt spacing 6-ft on center — complies with seismic zone D
PassIRC R403.1.6
4 Flagged
1 Advisory
2 Pass

Reinspection required before sheathing

Sample report — identifying details changed · Format identical to delivered document

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ADU Inspection Checklist

47-point pre-inspection guide covering framing, energy, and structural code items. Used by contractors across the Inland Empire.

Why Permit

Catches what city inspectors miss

340+ ADU inspections. 97% of clients pass their first city review after a Permit pre-inspection.

48-hour report turnaround

Typed, timestamped, code-cited PDF. Contractor-ready for your subcontractor correction list.

IRC · Title 24 · IECC authority

Every finding cites the specific section. No vague notes — exact code language your permit tech expects.

One inspector, every time

Not a franchise. One set of eyes, trained on California ADU code, who knows your project by the time framing starts.

"Got a correction notice on a Friday. Marcus was on-site Monday, report in hand Wednesday. We pulled sheathing, fixed five items, and passed city framing the following Tuesday."

Derek Santamaria

Project Manager · Inland Valley Build Co., Fontana CA