Seneca Cost Segregation delivers engineering-based cost segregation studies that reclassify your property assets into shorter depreciation schedules, legally accelerating deductions and putting real cash back in your hands. With over 10,200 studies completed nationwide and an average first-year deduction of $171,243, our veteran-owned team helps real estate investors across all 50 states maximize returns and grow their portfolios faster.
Comprehensive engineering-based studies and support services designed to maximize your real estate tax deductions and accelerate your cash flow.
A full engineering-based analysis that reclassifies your property assets into 5, 7, or 15-year depreciation schedules, unlocking accelerated deductions with an average first-year savings of $171,243. Includes audit defense and CPA support.
Claim missed depreciation on properties placed in service up to 15 years ago, without amending prior returns. Seneca uses IRS Form 3115 to capture all missed deductions in a single year.
Convenient 30–45 minute video-call inspections that eliminate travel costs and speed up study delivery to just 2–3 weeks, without disrupting your schedule or operations.
Every study comes backed by Seneca's AuditDefense guarantee, full IRS audit support at no additional charge for the entire duration of your property ownership, including a potential study cost refund.
Post-study support ensuring your CPA can seamlessly implement depreciation schedules into current or prior-year tax returns, included at no extra cost with every completed study.
Need your study fast? Expedited delivery in as little as one week is available for clients with urgent tax deadlines or time-sensitive requirements, with transparent rush pricing.
We start with a no-obligation consultation to assess your property's eligibility, deliver a preliminary savings estimate, and provide a transparent breakdown of study costs and projected ROI. Whether you own a single-family rental or a large commercial complex, we'll show you exactly what to expect before you commit.
See how real estate investors across the country have unlocked six-figure tax savings with Seneca Cost Segregation.
"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 expertise, and a client-first approach to deliver results that stand up to IRS scrutiny and put real money back in your portfolio.
Over 10,200 studies completed nationwide with a 95% client referral rate and average first-year savings of $171,243.
Every study is built on licensed engineering analysis and proprietary compliance-tested technology not estimates or shortcuts.
Deployed across all 50 states with virtual and on-site inspection options, so investors anywhere in the U.S. can access the same high-caliber service.
Our iron-clad AuditDefense guarantee covers you for the life of your property ownership backed by a potential study cost refund if a material issue arises.
Real estate investors and engineers who've walked in your shoes.
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 services involve an engineering-based analysis of your real estate property to reclassify building components into shorter depreciation categories — 5, 7, or 15 years, instead of the standard 27.5 or 39 years. This accelerates your depreciation deductions, significantly reducing your taxable income and increasing your cash flow in the near term.
Speak with a certified cost segregation specialist for a free, no-obligation consultation.
Seneca Cost Segregation serves real estate investors and property owners across every state in the nation, with virtual and on-site options available.
All 50 States
Service Area
10,200+
Studies Completed
95%
Client Referral Rate
We serve real estate investors in all 50 states virtually or on-site. Reach out to confirm availability in your area.
Certified Cost Segregation Professional — the industry's gold standard credential.
Perfect client satisfaction rating from verified reviews nationwide.
Proudly founded and operated by a United States Marine Corps veteran.
Tell us about your property and we'll deliver a no-obligation preliminary savings analysis most clients discover six-figure deduction opportunities they didn't know they had. Our team typically responds 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.