Cost Segregation Study
A full engineering-based analysis that reclassifies your California property's assets into 5, 7, or 15-year depreciation schedules, generating substantial first-year tax deductions and improving cash flow.
California property owners are leaving significant tax money on the table. Seneca Cost Segregation's engineering-based studies reclassify your building assets into shorter depreciation schedules, turning 20–40% of your property's cost into immediate tax savings. With California's high property values, the ROI potential is exceptional our average client saves $171,243 in their first year alone.
Comprehensive cost segregation solutions for California property owners, from first-time studies to lookback analyses and rush delivery.
A full engineering-based analysis that reclassifies your California property's assets into 5, 7, or 15-year depreciation schedules, generating substantial first-year tax deductions and improving cash flow.
Claim missed depreciation on California properties placed in service up to 15 years ago without amending prior returns. We file IRS Form 3115 to unlock all accumulated savings in a single tax year.
Every study comes with our Seneca AuditDefense guarantee that we handle all IRS inquiries at no extra charge for as long as you own the property, including a potential full study-cost refund if a material issue arises.
A convenient 30–45 minute video call inspection that eliminates costly on-site travel across California's sprawling metros, delivering faster 2–3 week turnarounds without disrupting your schedule.
Post-study support included at no charge, our team works directly with your California CPA or tax advisor to implement depreciation schedules and Form 3115 filings seamlessly into your tax returns.
Need your California cost segregation study completed before a tax deadline? Our expedited service delivers a complete, IRS-compliant engineering report in as little as one week.
We assess your California property's eligibility, model your preliminary tax savings and ROI, and provide a transparent breakdown of study costs versus expected deductions at no charge and with no obligation to proceed.
See how California property owners are saving six figures 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, veteran-founded integrity, and real real estate investor experience to deliver tax savings that are IRS-compliant and built to last.
Over 10,200 studies completed nationwide with a 95% client referral rate and an average first-year deduction of $171,243.
Serving investors across California's major markets such as Los Angeles, the Bay Area, San Diego, and Sacramento with full knowledge of California's high-value commercial and residential property landscape.
Our AuditDefense guarantee covers you for the entire duration of property ownership at no extra charge backed by a money-back refund promise.
Proprietary engineering technology enables studies completed in 2–4 weeks, half the industry standard keeping your California tax strategy on schedule.
Founded by real estate investors 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.
Study costs for California properties range from $3,000–$12,000 for entry-level properties ($300K–$1M) up to $30,000–$60,000+ for properties valued over $10M. Given California's high property values, ROI ratios typically range from 10:1 to 25:1. Seneca provides a free preliminary savings estimate so you can verify the study is financially worthwhile before committing.
Seneca Cost Segregation serves real estate investors across every California market, from Los Angeles to San Francisco and beyond.
All 50 States
Service Coverage
10,200+
Studies Completed
95%
Client Referral Rate
We serve property owners across all California cities and counties contact us to confirm coverage for your area.
American Society of Cost Segregation Professionals member in good standing.
Certified Cost Segregation Professional designation from ASCSP.
Perfect five-star rating from satisfied clients across the nation.
Fill out the form below and a Seneca cost segregation specialist will prepare a no-obligation preliminary savings analysis for your California property 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.