How many photos are needed for a cost segregation study?

A typical residential cost segregation study produces 80-150 photographs. A commercial study produces 200-500+ photographs. Each photo is tagged to a specific component in the asset register with a description, CSI code, and MACRS classification.

What are the most commonly missed components during a cost segregation inspection?

The most commonly missed components are site improvements: parking lots, landscaping, fencing, exterior lighting, storm drainage, and irrigation systems. These are all 15-year property and can represent 5-20% of a property's depreciable basis. If they are not photographed, they do not make it into the study.

Cost Segregation Site Inspection: What We Look For and Why It Matters

Q: Can I submit my own photos instead of having an engineer visit my property?

Yes. Many modern cost segregation providers accept owner-submitted photo and video tours supplemented by satellite imagery and public records. A 10-15 minute video walkthrough of a residential property captures more usable data than 50 individual photographs. This approach reduces cost and turnaround time while maintaining engineering quality.

The site inspection is the foundation of every engineering-based cost segregation study. It is where I identify components, verify conditions, and create the photographic evidence that supports every classification in the final report. A study without a thorough site inspection is a study without evidence, and evidence is what survives an IRS examination. After inspecting and photographing over 3,000 properties, I have developed a systematic approach that captures every reclassifiable component. This guide shows you exactly what I look for, why it matters, and how to document your own property if you are submitting photos for a remote study.

Why the IRS Cares About Your Inspection

The IRS Audit Techniques Guide for cost segregation specifically evaluates the quality of the site inspection and supporting documentation. An engineering-based study requires physical or photographic verification of every classified component. The ATG lists "a site visit or inspection" as one of the 13 principal elements of a quality study. When an auditor reviews your cost segregation report, they compare the asset register to the photographic evidence. Components without corresponding photographs are components without evidence.

Part 1: Exterior Building Documentation

The exterior inspection documents the building envelope. Most exterior building components are 27.5-year or 39-year property (structural), but several key items qualify for accelerated depreciation.

What to Capture	Why It Matters	Typical MACRS Life
Wide shots of each exterior wall section	Shows wall finishes, window count, mounted equipment	Reference
Building-mounted security cameras	Security equipment is personal property	5-year
Exterior decorative light fixtures	Decorative exterior fixtures may qualify as personal property	5-year
Building-mounted signage	Exterior signage is personal property	5-year
Awnings over windows/entries	Awnings are typically personal property	5-year
Roof-mounted equipment (if visible)	Satellite dishes, antennas may be 5-year	5-year

Stand far enough back to capture the entire wall section in one frame. I need to see the wall finish type (stucco, vinyl siding, brick veneer), count windows, and identify any mounted equipment. Take one wide shot per wall section — typically 4-8 shots for a residential property, 8-20 for commercial.

Part 2: Exterior Site Improvements

Site improvements are the highest-value category for 15-year land improvement classification, and they are where most property owners leave money on the table. Everything attached to the land but not the building is potentially 15-year property. A $500,000 property with a paved parking lot, landscaping, fencing, and exterior lighting can easily have $50,000-$80,000 in 15-year land improvements. But if you do not photograph them, they do not make it into the study.

Component	What to Capture	MACRS Life
Parking lot / driveway	Full extent of paved surfaces	15-year
Sidewalks and walkways	Concrete flatwork on site	15-year
Landscaping	Trees, shrubs, sod, planting beds	15-year
Fencing	All fence types, gates	15-year
Exterior site lighting	Pathway lights, pole lights, landscape uplighting	15-year
Storm drainage	Catch basins, drain structures	15-year
Irrigation system	Sprinkler heads, controllers	15-year
Retaining walls	Block, stone, or timber walls	15-year
Freestanding signage	Monument signs, directional signs	5-year

Start at one corner of the property and work your way around the perimeter. Take wide shots that show the full extent of paved areas, landscaping, and fencing. For parking lots, capture the overall area plus close-ups of striping, storm drains, and light poles. For landscaping, photograph major plantings so I can estimate quantities and RS Means costs.

Part 3: Interior Spaces

Interior documentation is where video becomes essential. A 10-15 minute video walkthrough of a residential property captures more usable data than 50 individual photographs. Walk slowly through every room, pausing to show flooring transitions, cabinetry, countertops, light fixtures, appliances, and any specialty features. I need to see every room, every closet, every bathroom, and every utility space.

Key Interior Components (5-Year Property)

Flooring: Carpet, vinyl plank, non-permanent tile, laminate — note transitions between rooms
Cabinetry: Kitchen cabinets, bathroom vanities, built-in shelving, closet systems
Countertops: Granite, quartz, laminate — photograph in each room where present
Appliances: Refrigerator, range, dishwasher, microwave, washer, dryer
Light fixtures: Decorative fixtures, recessed lighting, under-cabinet lights, ceiling fans
Window treatments: Blinds, shades, curtains, shutters
Specialty electrical: Dedicated circuits for equipment, USB outlets
Security systems: Keypads, motion sensors, cameras, smart locks

Part 4: MEP Systems (Mechanical, Electrical, Plumbing)

MEP systems are where the classification gets nuanced. General HVAC, electrical, and plumbing serving the building are 27.5/39-year structural. But specialty systems serving specific equipment or functions can be reclassified to 5-year property.

Photograph the electrical panel (shows the number of circuits and any dedicated circuits), water heater (standalone unit vs. building system), HVAC equipment (type, size, and whether it serves the entire building or specific areas), and any specialty plumbing or electrical serving specific equipment.

Video vs. Photography: My Recommendation

For interior spaces, I strongly prefer video. Walk through the entire property at a steady pace, narrating as you go. Point out recent renovations, specialty features, and any components you think might be relevant. Hold the camera at eye level and pan slowly across each room. A single continuous video is more valuable than dozens of individual snapshots because it provides spatial context that still photography cannot.

For exterior and site improvements, still photography works better. The engineer needs to zoom in on specific components and measure dimensions from the photographs. Take both wide establishing shots and close-ups of individual components.

For detailed guidance on site inspection photos and videos, see Overline's site inspection photo and video guide.