Accelerate Your Depreciation
for Your Mixed-Use Property

Properties under $1M: $995. Properties $15M+: $2,995 (includes free site visit consultation).
Use code TAXDAY2026 at checkout for 10% off. Offer ends April 15th.

What Is Cost Segregation for a Mixed-Use Property?

Cost segregation for mixed-use buildings reclassifies components of your property from their default depreciation schedules into shorter MACRS recovery periods of 5, 7, and 15 years. What makes mixed-use properties distinct is the dual-schedule structure: the residential portion (apartments, condos above) depreciates over 27.5 years, while the commercial portion (retail storefronts, office space, restaurants on the ground floor) depreciates over 39 years. A cost segregation study works across both schedules simultaneously.

Mixed-use buildings are among the most complex property types for depreciation -- and among the most rewarding for cost segregation. The combination of commercial storefront systems, residential interior finishes, shared building infrastructure (elevators, fire suppression, common lobbies), and extensive site improvements (parking, signage, landscaping) creates a larger pool of reclassifiable components than most single-use buildings. Studies typically reclassify 30--45% of the depreciable basis into shorter-life categories.

With 100% bonus depreciation permanently restored under the One Big Beautiful Bill Act, every dollar reclassified into 5, 7, or 15-year property can be deducted in Year 1. On a $3M mixed-use building, that can mean $300,000--$500,000+ in first-year deductions. For a deeper look at how this applies across commercial property types, read our commercial cost segregation guide or our dedicated mixed-use cost segregation guide.

Mixed-Use Components That Qualify for Accelerated Depreciation

Mixed-use buildings contain a wide range of reclassifiable components from both the commercial and residential portions, plus shared systems that must be allocated proportionally:

5-Year Property (Commercial): Storefront glazing and aluminum framing, commercial-grade HVAC systems dedicated to retail or office tenants, grease traps and commercial kitchen exhaust hoods, tenant improvement allowances (flooring, partitions, specialty lighting), point-of-sale wiring and data infrastructure, security and surveillance systems, and separate electrical panels or metering for commercial units.

5-Year Property (Residential): Kitchen appliances (refrigerator, range, dishwasher, microwave), carpeting and vinyl plank flooring, cabinetry and countertops, bathroom vanities and mirrors, interior light fixtures, ceiling fans, window treatments, and in-unit laundry equipment. In furnished units, all furniture, mattresses, linens, and kitchenware also qualify.

7-Year Property: Elevators and conveying systems (allocated between residential and commercial), fire suppression systems, building management and automation systems, intercom and access control systems, and common-area artwork or removable decorative elements.

15-Year Property: Parking structures and paved surface lots, exterior signage (building-mounted and freestanding), landscaping and irrigation, sidewalks and pedestrian areas, exterior lighting (pole-mounted and wall-mounted), retaining walls, fencing, and storm drainage systems. For mixed-use properties with ground-floor retail, the storefront canopy and awning structures often qualify as 15-year property as well.

The overall reclassification rate for mixed-use buildings depends heavily on the commercial/residential split, the age and condition of the building, and the extent of site improvements. Buildings with ground-floor restaurants or medical offices tend toward the higher end of the range because of their specialized mechanical and plumbing systems.

Why Mixed-Use Property Owners Order Cost Segregation Studies

Dual schedules create a larger pool of reclassifiable components. Because your property spans two depreciation schedules (27.5yr and 39yr), there are more components eligible for shorter-life reclassification than in a single-use building. The commercial storefronts, residential interiors, shared infrastructure, and site improvements each contribute their own set of accelerated deductions. A cost segregation study identifies and schedules every one.

Shared systems are often depreciated incorrectly without a study. Elevators, fire suppression, common-area lobbies, and building-wide mechanical systems must be allocated between the residential and commercial portions. Without a cost segregation study, these shared systems are typically lumped into a single depreciation schedule and depreciated at the longest applicable life. The study ensures proper allocation and reclassification of the shorter-life components within each shared system.

Ground-floor commercial tenants add high-value components. Retail storefronts, restaurant build-outs, and office tenant improvements all contain significant 5-year personal property -- specialty lighting, commercial HVAC, grease traps, data cabling, and flooring. These components are frequently worth $50,000--$150,000+ in accelerated deductions on a mid-sized mixed-use building, and are often missed when the property is depreciated using only the standard schedule.

Studies delivered in under one hour. Traditional cost segregation firms quote $10,000--$25,000 for mixed-use properties and take 4--8 weeks. Our engineering-based methodology uses RSMeans cost data, county assessor records, and satellite imagery to deliver a CPA-ready PDF report in under one hour, starting at $995 for properties under $1M. See our $2M commercial example or $3M commercial example for full component breakdowns.