Washington real estate investors face some of the highest property values in the nation—meaning greater tax burdens and greater opportunity. Seneca Cost Segregation's engineering-based studies reclassify your property assets to unlock accelerated depreciation, turning 20–40% of your property costs into immediate tax savings. With over 10,200 studies completed and an average first-year deduction of $171,243, we deliver results in weeks, not months.
Comprehensive engineering-based cost segregation solutions for Washington real estate investors seeking maximum, IRS-compliant tax savings.
A full engineering-based analysis that reclassifies your property assets into shorter depreciation schedules—5, 7, or 15 years—unlocking accelerated deductions and first-year savings averaging $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. Using IRS Form 3115, all overlooked deductions are captured in a single tax year—no time wasted.
A convenient 30–45 minute video call inspection that eliminates travel costs and accelerates turnaround to 2–3 weeks. Full engineering-grade component identification and classification is completed in real time.
Every study includes Seneca AuditDefense at no extra charge. If the IRS ever questions your cost segregation, our specialists handle all inquiries and documentation for the entire duration of property ownership.
Post-study implementation support ensures your CPA can seamlessly integrate depreciation schedules into your tax returns. Includes Form 3115 guidance for lookback studies and direct coordination with your tax professional.
Need your study fast? Seneca delivers completed cost segregation reports in as little as one week to meet tax deadlines or urgent filing requirements—without sacrificing engineering accuracy or IRS compliance.
Washington's booming real estate market—from Seattle's high-rise multifamily developments to Spokane's growing commercial corridors—means significant depreciable property value sitting underutilized. Seneca Cost Segregation's engineers systematically reclassify your building components into 5-, 7-, and 15-year depreciation schedules, legally front-loading deductions that slash your federal tax bill. With proprietary compliance technology, a 95% client referral rate, and an average ROI of 10–25:1, our studies are designed to pay for themselves many times over in your very first year.
See how Washington real estate investors are unlocking six-figure tax savings with Seneca Cost Segregation.
"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."
"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."
"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."
"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."
"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"
"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."
"Their team was incredibly professional, prompt, and easy to work with."
"Seamless experience with great results. Highly recommend!"
"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."
"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."
"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."
"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."
"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"
"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."
"Their team was incredibly professional, prompt, and easy to work with."
"Seamless experience with great results. Highly recommend!"
"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."
"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."
"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."
"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."
"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"
"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."
"Their team was incredibly professional, prompt, and easy to work with."
"Seamless experience with great results. Highly recommend!"
Washington property owners trust Seneca for one reason: we consistently deliver maximum, defensible tax savings with unmatched speed and transparency.
Over 10,200 studies completed nationwide, with an average first-year deduction of $171,243 and a 95% client referral rate.
Deployed across all 50 states, our engineers understand Washington's high-value property landscape and local market nuances from Seattle to the Tri-Cities.
Every study includes lifetime IRS Audit Defense at no extra charge, backed by an iron-clad money-back guarantee for complete peace of mind.
Founded by a Marine Corps veteran and a PNW real estate investor, Seneca brings real-world investing experience and 12+ years of cost segregation expertise to every client.
Industry experts and real estate veterans dedicated to maximizing your tax savings.
Co-Founder and CEO
Dylan Scandalios is an active investor in multi-family properties across the Pacific Northwest, giving him firsthand insight into the tax challenges Washington real estate investors face. Before founding Seneca Cost Segregation, Dylan closed millions of dollars in business for both public and private companies along the West Coast. As Co-Founder and CEO, he has channeled that commercial expertise into building one of the most trusted cost segregation firms in the country. Dylan's deep understanding of real estate investment strategy and tax optimization has helped countless Washington and nationwide investors unlock six-figure savings and dramatically improve their cash flow. Under his leadership, Seneca has completed over 10,200 studies and achieved a 95% client referral rate.
Co-Founder
Paul Spies brings a rare combination of military discipline, construction expertise, and real estate investment acumen to Seneca Cost Segregation. A Marine Corps Sergeant, Paul accumulated over 8 years of hands-on real estate construction experience, successfully flipping more than 150 homes in 4 years and leading ground-up multi-family projects throughout the Pacific Northwest. As a Principal Broker and Licensed Contractor, Paul personally used cost segregation since 2018 to gain a competitive edge in his own portfolio. Recognizing that most investors lacked access to affordable, high-quality studies, he co-founded Seneca Cost Segregation to deliver the same strategic advantage to real estate investors across Washington and the entire country—on time and at a fair price.
Chairman
Howard Hirsch serves as Chairman of Seneca Cost Segregation, providing strategic oversight and governance to ensure the firm maintains its commitment to engineering excellence, IRS compliance, and client-first service. With a leadership background spanning real estate and financial services, Howard plays a pivotal role in guiding Seneca's growth and upholding the high standards that have earned the company a 5.0 average client rating. His vision and counsel have been instrumental in expanding Seneca's reach to all 50 states while preserving the personalized, responsive service that sets the firm apart from larger competitors in the cost segregation industry.
Cost segregation in Washington state is an IRS-approved tax strategy where a licensed engineering team analyzes your investment property and reclassifies building components—such as flooring, lighting, landscaping, and specialty systems—from 27.5- or 39-year depreciation schedules into shorter 5-, 7-, or 15-year schedules. This accelerates your depreciation deductions, generating significant front-loaded tax savings. Given Washington's high property values, particularly in the Seattle metro area, the savings potential is often substantial.
Speak with a Seneca expert for a free, no-obligation consultation and savings estimate.
Seneca Cost Segregation serves real estate investors across all of Washington state and nationwide, delivering engineering-based studies wherever your properties are located.
All 50 States
Service Coverage
10,200+
Studies Completed
95%
Client Referral Rate
We serve all Washington state locations—contact us to confirm and get your free savings estimate.
Member of the American Society of Cost Segregation Professionals
Certified Cost Segregation Professional designation holder
Perfect five-star rating from satisfied clients nationwide
Complete the form below and a Seneca Cost Segregation specialist will provide a no-obligation preliminary savings analysis for your Washington 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