Thornton building inspections

Applies to: Accessory Dwelling Unit (ADU) Permit

1. 1

   Foundation

   Footings and foundation before concrete pour, below the 36-inch amended frost line

2. 2

   Framing

   Structural framing, egress windows, fire separation (if attached)

3. 3

   MEP Rough-In

   Mechanical, electrical, plumbing rough-ins before walls closed

4. 4

   Final

   All work complete, ready for Certificate of Occupancy

Applies to: Commercial Tenant Improvement Permit

1. 1

   Framing / Structural

   After framing complete, before walls covered

2. 2

   MEP Rough-In

   Mechanical, electrical, plumbing rough-in before walls closed

3. 3

   Fire Inspection

   Fire alarm, sprinkler, and suppression system inspections coordinated with the Fire Department

4. 4

   Final / Certificate of Occupancy

   All work complete, life safety systems functional

Applies to: Residential Addition / Remodel Permit

1. 1

   Foundation (if new footings)

   Before concrete pour, below the 36-inch amended frost line

2. 2

   Framing

   After framing complete, before insulation or wall cover

3. 3

   MEP Rough-In

   Electrical, plumbing, mechanical rough-in before walls closed

4. 4

   Final

   All work complete per approved plans

Applies to: Deck / Covered Patio Permit

1. 1

   Footing

   Before concrete pour for structural post footings, below the 36-inch amended frost line

2. 2

   Framing

   Structural framing before decking/roof cover installed

3. 3

   Final

   Structure complete per approved plans

Applies to: Fire Sprinkler / Fire Alarm System Permit

1. 1

   Underground Piping Acceptance Test (sprinkler systems)

   Flushing and acceptance testing of underground mains, lead-in connections, and hydrants before connection to the fire protection system piping, per NFPA 13 §6.11

2. 2

   Sprinkler System & Fire Service Main Acceptance Test

   Hydrostatic test of all piping at 200 psi for two hours, plus waterflow-switch and main-drain testing, per NFPA 13 §29

3. 3

   Fire Alarm Acceptance Test

   Visual inspection and testing of all applicable components per NFPA 72 Chapter 14; schedule at least 4 working days in advance

Applies to: Plumbing Permit

1. 1

   Underground / Under-slab

   Before concrete pour — verify pipe slope, materials, cleanouts

2. 2

   Rough-In

   After pipes installed, before walls closed

3. 3

   Final

   All fixtures connected, no leaks, proper venting verified

Applies to: Roofing Permit (Reroof)

1. 1

   Sheathing Inspection

   All roof sheathing installations inspected prior to covering

2. 2

   Mid-Roof Inspection

   Photo submittal via text: old roof covering removed, drip edge/valley flashing installed, 75-100% felt underlayment, 40-75% shingles installed

3. 3

   Final Inspection

   Done virtually (FaceTime/Google Meet); shingles self-sealed, all flashing complete

Applies to: Change of Use (Business Change of Certificate of Occupancy)

1. 1

   Building Inspection (Change of Occupancy)

   Checks exit/bathroom signage, emergency lighting, exit doors, corridor/hallway obstructions, and mechanical/electrical/plumbing code issues; food service businesses must submit a Tri-County Health Inspection Report prior to final inspection

2. 2

   Fire Prevention Inspection (Change of Occupancy)

   Checks Knox Box access, occupant load posting, fire lane/hydrant clearance, means of egress, and fire extinguisher service; businesses with an existing Fire Alarm, Sprinkler, or Hood System must show proof of testing/inspection within the past 12 months

Applies to: Demolition Permit

1. 1

   Pre-Demolition Utilities Verification

   Verification that gas, electric, water, and sewer are disconnected before demolition begins

2. 2

   Final

   Site cleared per approved permit scope

Applies to: Electric Vehicle (EV) Charging Station Permit

1. 1

   Rough-In

   Wiring and conduit installed before walls closed, per the same framework documented in the Electrical Permit entry.

2. 2

   Final

   Charger installed, panel labeled, system energized and operational.

Applies to: Electrical Permit

1. 1

   Rough-In

   Wiring and conduit installed before walls closed

2. 2

   Final

   All devices installed, panel labeled, system energized

Applies to: Mechanical / HVAC Permit

1. 1

   Rough-In / Equipment

   Equipment installation and gas piping before walls closed or concealed

2. 2

   Final

   Equipment operational, combustion air and venting verified

Applies to: Solar PV Permit

1. 1

   Rough Electrical

   Conduit runs, wire sizing, disconnect placement before cover

2. 2

   Final (Virtual)

   Conducted virtually between 8:00-10:00 a.m. following installation completion; onsite technician contact required