5-year5year property
Personal property
Carpet, lighting, millwork and cabling.
Eligible for bonus depreciationEngineered cost segregation for commercial real estate
Lower taxes and more cash flow, from a study our engineers build to the IRS audit guide.
- Built to the IRS CSATG
- Lifetime audit defense
- Proposal in 24 to 48 hours
- 10,200+ studies completed
- All 50 states
- Head of Engineering sign-off
- $1B+ cost basis analyzed
- 425+ CPAs and advisors
What a study finds in your building
The parts of your building you can write off faster.
5-year
7-year7year property
Furniture and equipment
Furnishings and equipment.
Eligible for bonus depreciation
15-year15year property
Land improvements
Paving, landscaping and site lighting.
Eligible for bonus depreciation
39-year39year property
The structure
The shell and core systems.
Not eligible for bonus depreciationBonus depreciation is back and permanent.
100% first-year bonus for qualifying property acquired after January 19, 2025.
What it means for your propertyBonus covers 20 years or less
5
7
15
27.5
39
We specialize in commercial real estate
Every property type, from hotels to lumber mills.
Multifamily 5+
Hospitality
Office
Medical & Care Facilities
Industrial & Flex
Manufacturing & Production
Retail & Restaurants
Automotive
Self-Storage
Mobile Home & RV Parks
Recreation
Agriculture & Rural
Mixed-Use
SpecialtyData Centers
SpecialtyLaboratories
SpecialtyGyms & Fitness Centers
SpecialtyDental & Surgery Centers
SpecialtyIndependent Living Facilities
1 to 4 units or a short-term rental? Senecacostseg.com
We follow the IRS audit guide to the line
Every study is built to the IRS Cost Segregation Audit Techniques Guide (CSATG).
Estimates by Engineering
Not a sales quote.
Head of Engineering sign-off
On every study.
Lifetime audit defense
For as long as you own it.
QPP studies
One of the few firms that can do them.
We build the business case with you
See the ROI before you commit, with your CPA in the loop.
- 1Engineering estimates your propertyNot a sales quote
- 2You get a fixed-fee proposalIn 24 to 48 hours
- 3You decide with your CPAWith the ROI in front of you
Our Process
3 to 5 weeks, start to finish.
Engineering-prepared estimate
Proposal in 24 to 48 hoursInfo collection
Secure upload, NDAs availableSite tour
Virtual or onsiteReport and deliverable
Head of Engineering sign-off
Offer cost segregation to your clients
We do the engineering and prepare Form 3115. You sign and file.
Partner with us
Common questions
Still have a question? Ask Engineering.
What is a cost segregation study?
An engineering study that breaks a commercial building into its components and puts each one in the recovery period the law gives it. Carpet, millwork, site work and similar items move out of the 39-year building and into 5, 7 or 15-year lives, which speeds up depreciation.
Do your studies follow the IRS audit guide?
Yes. Every study follows the IRS Cost Segregation Audit Techniques Guide (CSATG) to the line, and every study is signed off by our Head of Engineering before it is delivered.
Will you help us decide if a study is worth it?
Yes. We work with you and your CPA to build the business case and ROI first. Engineering prepares the estimate, and you get a written, fixed-fee proposal within 24 to 48 hours.
What properties do you study?
All commercial property and multifamily with 5 or more units, in all 50 states.
Get a Commercial Savings Estimate
Fixed-fee proposal in 24 to 48 hours.
- Prepared by Engineering
- Lifetime audit defense
- NDAs available
info@senecacostseg.com
1210 Jackson St SE, Suite 2, Albany, OR 97322
Request your estimate
Estimates are prepared by our Engineering team.
Request received
Engineering will review the property and send your written estimate and proposal within 24 to 48 hours.
Preview site: this form is not yet connected, so nothing was sent.