Cost Segregation Services for Office Buildings

Cost segregation of commercial buildings is an IRS-approved engineering study that identifies and reclassifies building components such as interior finishes, electrical systems, parking lots, and landscaping into shorter depreciation categories of 5, 7, or 15 years instead of the standard 39-year schedule. This accelerates depreciation deductions, significantly reducing your federal tax liability in the early years of ownership.

Every Seneca cost segregation study includes a comprehensive engineering report, detailed depreciation schedules, cost reconciliation workpapers, Form 3115 preparation if needed, CPA coordination and implementation support, and the Seneca AuditDefense guarantee all at no additional charge. There are no hidden fees. A free preliminary analysis is also provided upfront to confirm the study is financially worthwhile before any commitment. Contact Seneca for a no-obligation savings estimate and transparent cost breakdown for your specific office building.

Savings depend on your property's size and depreciable basis. Entry-level office properties ($300K–$1M) typically yield $30,000–$75,000 in first-year savings. Medium properties ($1M–$3M) can save $75,000–$200,000, and large office buildings ($3M–$10M) often achieve $200,000–$400,000 in year-one deductions. Seneca's average client achieves a first-year deduction of $171,243, with ROI ratios typically ranging from 10:1 to 25:1.

Most income-producing office buildings with a depreciable basis of $300,000 or more qualify for a cost segregation study. This includes standard office buildings, office condos, office/warehouse flex spaces, and medical office buildings. The property must be used for income-producing purposes. Seneca offers a free preliminary analysis to confirm eligibility and estimate your potential tax savings before you commit.

Yes. Through a Lookback Cost Segregation Study, you can claim all missed depreciation on office buildings purchased, constructed, or renovated up to 15 years ago without amending prior tax returns. Seneca uses IRS Form 3115 to apply the change in accounting method, allowing you to capture all unclaimed deductions in a single tax year. Lookback studies cost approximately the same as current-year studies.

Seneca completes most office building cost segregation studies within 2–4 weeks, significantly faster than the industry standard of 4–8 weeks. If you opt for a virtual property inspection instead of an on-site visit, turnaround is typically 2–3 weeks. Rush service is available for clients with urgent tax deadlines, delivering completed studies in as little as one week.

Seneca Cost Segregation serves office building owners across all 50 states, including standard office buildings, office condos, office/warehouse flex spaces, and medical office buildings. Studies can be conducted via a convenient 30–45 minute virtual video-call inspection or an on-site visit, making nationwide service both accessible and fast regardless of your location.

Cost segregation studies have a low audit risk profile when conducted with proper engineering methodology and IRS-compliant documentation. Seneca's studies are built on engineering-based analysis and strict adherence to IRS guidelines, making them highly defensible. Additionally, every study includes the Seneca AuditDefense guarantee at no extra cost if your office building study is ever audited, Seneca defends it fully for as long as you own the property.

Illustrative only, with assumed numbers. An investor buys an office building for $4,000,000 with $800,000 allocated to land, leaving $3,200,000 of building basis. Assume a study reclassifies $384,000 to 5- and 7-year property, such as removable carpet, decorative lighting and millwork, and dedicated electrical for equipment, and $192,000 to 15-year land improvements, such as parking, sidewalks and landscaping. Placed in service in July with 100% bonus depreciation, first-year depreciation is about $606,884: $576,000 of bonus plus $30,884 on the remaining $2,624,000 over 39 years. Without a study it would be about $37,664.

There are four to weigh. Recapture: when you sell, gain on 5- and 7-year property is taxed as ordinary income under section 1245, and unrecaptured section 1250 gain is taxed at up to 25%. Usability: for many investors the losses are passive and wait until there is passive income or a sale. State taxes: some states, including California, do not follow federal bonus depreciation, so separate state schedules may be needed. Cost: the study fee is paid up front, so a small building or a short hold may not justify it. A 1031 exchange or holding until death can reduce the recapture issue.

It is the de minimis safe harbor election in Treas. Reg. 1.263(a)-1(f). If you make the election each year on a timely filed return, you can deduct items of tangible property costing up to $2,500 per invoice or item, or $5,000 if you have an applicable financial statement, instead of capitalizing them. For office owners it often covers smaller purchases such as lobby furniture or break-room appliances. Larger projects, such as an HVAC replacement or a suite build-out, are tested under the improvement rules and, if capitalized, can still benefit from cost segregation or qualified improvement property treatment.

Interior improvements to an office building made after the building was first placed in service are generally qualified improvement property, which is 15-year property eligible for bonus depreciation. Work that enlarges the building, elevators and escalators, and the internal structural framework are excluded and stay at 39 years. Only the owner of an improvement depreciates it, so check the lease to see whether the landlord or the tenant paid for and owns the build-out. If a landlord-funded build-out is abandoned when the tenant leaves, the landlord can generally write off the remaining basis under section 168(i)(8)(B).