Office building owners are leaving significant tax savings on the table every year. Seneca Cost Segregation delivers engineering-based cost segregation studies that reclassify your office property's components into shorter depreciation schedules, unlocking front-loaded deductions, boosting cash flow, and reducing your federal tax burden. With over 10,200 studies completed nationwide, we deliver results in 2–4 weeks.
Comprehensive cost segregation solutions designed to maximize tax savings for office building owners and investors.
A full engineering-based analysis of your office building that reclassifies assets into 5, 7, or 15-year depreciation schedules instead of the standard 39 years generating substantial first-year tax deductions and improved cash flow.
Claim missed depreciation on office buildings purchased or renovated up to 15 years ago. Using IRS Form 3115, we recover all unclaimed deductions in a single tax year, no amended returns required.
A convenient 30–45 minute video-call inspection of your office building that eliminates costly on-site travel. Results in faster study turnaround of 2–3 weeks and lower overall study costs for office property owners.
Every office building cost segregation study includes our Seneca AuditDefense guarantee at no extra charge. We defend your report with the IRS for the entire duration of your property ownership backed by a money-back guarantee.
Seamless post-study coordination with your CPA or tax professional to ensure cost segregation findings are correctly implemented into your office building's tax returns, including Form 3115 support for lookback studies.
Need your office building cost segregation study completed before a tax deadline? Our expedited rush service delivers completed studies in as little as one week to meet your most urgent filing requirements.
We begin with a no-cost consultation to assess your office building's eligibility, provide a preliminary savings estimate, and give you a transparent breakdown of expected costs and ROI. Office properties with a depreciable basis of $300,000 or more typically qualify for significant benefits.
See how office building owners across the country have unlocked six-figure tax savings with Seneca.
"We contacted Seneca for a Cost Seg Study and they went above and beyond. Their eagerness to help and province of info will blow you away."
"I couldn't be more pleased with the results. Their team was incredibly professional, prompt, and easy to work with. I achieved a highly favorable tax situation and recommend Seneca to anyone looking to maximize their tax benefits."
"Dylan and his team at Seneca Cost Segregation are extremely knowledgeable. When I explored their website, it was clear they knew their stuff. It offered a very professional approach to cost segregation, backed by years of experience."
"We contacted Dylan for a cost seg study and he went above and beyond Not only will their pricing be the best price you will find, his eagerness to help and province info will blow you away"
"The tax savings achieved with Seneca Cost Segregation made a major impact on my bottom line. I wasn't aware it was a possibility until they brought the opportunity to me. Their insight and expertise are invaluable."
"Their team was incredibly professional, prompt, and easy to work with."
"Seamless experience with great results. Highly recommend!"
"I've referred multiple clients to Seneca, and each time they uncovered significant tax savings. Their team is fast, professional, and easy to work with. They've become a trusted extension of our tax strategy."
"Extremely professional and efficient in their cost set analysis. Great communication and transparency. Will be using them going forward on all my properties."
"We contacted Seneca for a Cost Seg Study and they went above and beyond. Their eagerness to help and province of info will blow you away."
"I couldn't be more pleased with the results. Their team was incredibly professional, prompt, and easy to work with. I achieved a highly favorable tax situation and recommend Seneca to anyone looking to maximize their tax benefits."
"Dylan and his team at Seneca Cost Segregation are extremely knowledgeable. When I explored their website, it was clear they knew their stuff. It offered a very professional approach to cost segregation, backed by years of experience."
"We contacted Dylan for a cost seg study and he went above and beyond Not only will their pricing be the best price you will find, his eagerness to help and province info will blow you away"
"The tax savings achieved with Seneca Cost Segregation made a major impact on my bottom line. I wasn't aware it was a possibility until they brought the opportunity to me. Their insight and expertise are invaluable."
"Their team was incredibly professional, prompt, and easy to work with."
"Seamless experience with great results. Highly recommend!"
"I've referred multiple clients to Seneca, and each time they uncovered significant tax savings. Their team is fast, professional, and easy to work with. They've become a trusted extension of our tax strategy."
"Extremely professional and efficient in their cost set analysis. Great communication and transparency. Will be using them going forward on all my properties."
"We contacted Seneca for a Cost Seg Study and they went above and beyond. Their eagerness to help and province of info will blow you away."
"I couldn't be more pleased with the results. Their team was incredibly professional, prompt, and easy to work with. I achieved a highly favorable tax situation and recommend Seneca to anyone looking to maximize their tax benefits."
"Dylan and his team at Seneca Cost Segregation are extremely knowledgeable. When I explored their website, it was clear they knew their stuff. It offered a very professional approach to cost segregation, backed by years of experience."
"We contacted Dylan for a cost seg study and he went above and beyond Not only will their pricing be the best price you will find, his eagerness to help and province info will blow you away"
"The tax savings achieved with Seneca Cost Segregation made a major impact on my bottom line. I wasn't aware it was a possibility until they brought the opportunity to me. Their insight and expertise are invaluable."
"Their team was incredibly professional, prompt, and easy to work with."
"Seamless experience with great results. Highly recommend!"
"I've referred multiple clients to Seneca, and each time they uncovered significant tax savings. Their team is fast, professional, and easy to work with. They've become a trusted extension of our tax strategy."
"Extremely professional and efficient in their cost set analysis. Great communication and transparency. Will be using them going forward on all my properties."
Over 10,200+ engineered cost segregation studies completed across the United States. Average first-year tax deduction: $171,243
Studies Completed
Avg Tax Savings
Partners
"I've referred multiple clients to Seneca, and each time they uncovered significant tax savings. Their team is fast, professional, and easy to work with. They've become a trusted extension of our tax strategy."
Eliot Varnum CPA, Varnum, Finch & Co. "Every client we send their way whether it's their first cost segregation study or their seventh is treated like their most important client. Their team's attention to detail, responsiveness, and genuine commitment to adding value set them apart."
Matt Bontrager CEO, Truebooks CPA We combine engineering precision, real estate investor experience, and a client-first approach to deliver maximum tax savings for office building owners.
Over 10,200 cost segregation studies completed nationwide with an average first-year deduction of $171,243.
Every study is built on IRS-compliant engineering analysis delivering accurate, defensible results that hold up under scrutiny.
Our Seneca AuditDefense guarantee covers your office building study for as long as you own the property, at no additional cost.
Deployed across all 50 states with studies completed in 2–4 weeks, significantly faster than the industry standard of 4–8 weeks.
Founded by real estate investors who understand your tax challenges firsthand.
Co-Founder and CEO
Dylan Scandalios is an active investor in multi-family properties in the Pacific Northwest and a recognized Cost Segregation Expert. Before founding Seneca Cost Segregation, Dylan closed millions of dollars in business for both public and private companies along the West Coast, developing deep expertise in real estate finance and tax strategy. As CEO, Dylan has helped thousands of real estate investors including office building owners save millions on their federal taxes through engineering-based cost segregation studies. His hands-on investment background means he approaches every client engagement with the perspective of an investor, not just a service provider. Under his leadership, Seneca has completed over 10,200 studies nationwide and achieved a 95% client referral rate.
Co-Founder
Paul Spies is a Marine Corps Sergeant who brings over 8 years of hands-on expertise in real estate construction to Seneca Cost Segregation. As a Principal Broker and Licensed Contractor, Paul successfully flipped over 150 homes in just four years and led ground-up multi-family development projects across the country. Having leveraged cost segregation personally since 2018 to maximize returns on his own office and residential properties, Paul co-founded Seneca to make the same powerful tax strategy accessible to investors nationwide at an affordable price point and delivered on time. His construction background gives Seneca a unique engineering advantage when analyzing complex office building components and systems.
Chairman
Howard Hirsch serves as Chairman of Seneca Cost Segregation, providing executive leadership and strategic oversight to the firm's continued national expansion. With deep experience in financial services and real estate advisory, Howard helps guide Seneca's direction as it scales its engineering-based cost segregation services to property owners across all 50 states, including California's dynamic real estate market. His leadership ensures the company maintains its commitment to technical excellence, client satisfaction, and IRS-compliant study delivery that protects clients through every phase of property ownership.
President/Treasurer
Harry Papp serves as President and Treasurer of Seneca Cost Segregation, overseeing the company's operational and financial integrity. His dual role ensures that client investments in cost segregation studies generate maximum ROI through rigorous financial management and disciplined operational processes. Harry's leadership directly supports Seneca's ability to deliver studies on time and within budget a standard that has helped the firm achieve a 95% client referral rate and an average first-year deduction of $171,243 for property owners across California and the rest of the nation.
Merle Rosskam
CEO
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.
Seneca Cost Segregation serves office building owners across all 50 states with virtual and on-site study options.
All 50 States
Service Area
10,200+
Studies Completed
Virtual or On-Site
Availability
We serve office building owners in all 50 states, reach out to confirm availability in your market.
Member of the American Society of Cost Segregation Professionals.
Certified Cost Segregation Professional designation from ASCSP.
Perfect five-star rating from satisfied clients nationwide.
Complete the form below and a Seneca specialist will provide a no-obligation savings estimate and ROI analysis for your office building, typically within one business day.
For immediate assistance, feel free to give us a direct call at +1 530-797-6539. You can also send us a quick email at info@senecacostseg.com.
For immediate assistance, feel free to give us a direct call at +1 530-797-6539. You can also send us a quick email at info@senecacostseg.com.