Arizona's booming real estate market means significant tax opportunities for property owners — but only if you know how to claim them. Seneca Cost Segregation delivers IRS-compliant, engineering-based studies that reclassify your property assets for accelerated depreciation, turning 20–40% of your property costs into immediate tax savings. With an average first-year deduction of $171,243 and a 10:1+ ROI, the math speaks for itself.
Comprehensive engineering-based cost segregation solutions for Arizona real estate investors and property owners of every asset class.
Full engineering-based analysis that reclassifies property assets into 5-, 7-, or 15-year depreciation schedules, delivering substantial first-year tax deductions with a comprehensive report, depreciation schedules, and full audit defense included.
Recapture missed depreciation on properties placed in service up to 15 years ago using IRS Form 3115, no amended returns required. Ideal for Arizona investors who haven't yet leveraged cost segregation.
Every study includes Seneca's AuditDefense guarantee at no extra charge. If the IRS audits your cost segregation study, our specialists handle all communications and documentation for as long as you own the property.
Convenient 30–45 minute video-based property inspections that eliminate travel costs and cut turnaround time to 2–3 weeks which is ideal for Arizona investors managing multiple properties across the state.
Post-study implementation support ensuring your CPA can seamlessly integrate the depreciation schedules and fixed asset reports into your tax filings, including guidance on Form 3115 for lookback studies.
Need your study before an Arizona tax deadline? Our expedited service delivers completed engineering studies in as little as one week, prioritizing your property without sacrificing accuracy or compliance.
We assess your Arizona property's eligibility, run a preliminary savings analysis, and provide a transparent breakdown of projected tax benefits and ROI at no cost or obligation. Most Arizona property owners are surprised by how much they've been leaving on the table.
See how Arizona property owners are saving hundreds of thousands in taxes 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 investor expertise, and proprietary technology to deliver maximum tax savings on time, every time.
Over 10,200 studies completed nationwide and an average first-year deduction of $171,243, Arizona investors trust our results.
Our ASCSP-certified engineers use proprietary technology for IRS-compliant, audit-ready studies built to withstand scrutiny.
From Phoenix and Scottsdale to Tucson and Flagstaff, we serve Arizona property owners remotely or on-site with fast 2–4 week turnarounds.
Founded by a Marine veteran and real estate investor, we understand what's at stake and we deliver 95% client referral rates to prove it.
Real estate investors and engineers who have 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.
A cost segregation study in Arizona is an IRS-approved engineering analysis that reclassifies components of your real property, such as flooring, lighting, landscaping, and specialized equipment from 27.5 or 39 year depreciation into shorter 5, 7, or 15 year schedules. This accelerates your depreciation deductions, reducing your federal tax liability significantly in the early years of ownership. Arizona property owners, particularly in high-growth markets like Phoenix and Scottsdale, commonly use it to boost cash flow and fund new acquisitions faster.
Talk to a Seneca specialist for a free consultation and no-obligation savings estimate.
From Phoenix and Scottsdale to Tucson, Flagstaff, and beyond, Seneca serves real estate investors across all of Arizona.
All 50 States
States Covered
10,200+
Studies Completed
95%
Client Referral Rate
We serve property owners throughout Arizona, reach out to confirm your location and get a free estimate.
Proud member of the American Society of Cost Segregation Professionals.
Team holds the Certified Cost Segregation Professional credential.
Perfect five-star average rating from satisfied clients nationwide.
Fill out the form below and a Seneca specialist will reach out within one business day with a no-obligation preliminary savings analysis for your Arizona property.
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.