A cost segregation study is only as accurate as the information behind it. Before an engineering team can identify which building components qualify for accelerated depreciation, they need a clear picture of the property: what it cost, when it was placed in service, how it was built or renovated, and how it’s used today. Gathering that documentation upfront is one of the simplest ways a property owner can help the process move efficiently and keep the final study well supported.
The good news is that most of what’s needed already exists somewhere in a property’s records, whether that’s with the owner, the accounting team, a lender, or a general contractor. Below is a rundown of what’s typically requested, organized by category, along with what to do if something isn’t readily available.
Property Acquisition Documents
For a purchased property, the closing or settlement statement is one of the most important documents in the entire study. It establishes the total purchase price and the allocation between land and building, both of which anchor the depreciable basis the study will work from. Alongside the settlement statement, the purchase agreement itself can help clarify any negotiated allocations or included personal property.
If the property was newly constructed rather than purchased, this category is replaced by construction cost records, covered below.
Prior Depreciation Records
For any property that’s already in service, CSSI will typically request the current depreciation schedule, often referred to as Form 4562 or the fixed asset ledger maintained by the accounting team. This shows how the property has been depreciated to date and is essential for calculating the catch up adjustment when a lookback study is performed. It also helps confirm the placed in service date, which determines the bonus depreciation rate available for reclassified components.
Construction and Renovation Costs
For new construction, ground up development, or a significant renovation, the study relies heavily on itemized construction costs rather than a single purchase price. Useful documents here include the AIA G702/G703 pay applications or contractor draw schedules, detailed contractor and subcontractor invoices, change orders, and architectural or engineering blueprints. The more granular the cost breakdown, the more precisely components like specialty electrical, plumbing, or site improvements can be identified and classified.
Site and Property Details
A site plan or plot survey helps the engineering team understand land improvements such as parking lots, landscaping, fencing, and drainage systems, all of which may qualify for shorter depreciation lives. A recent property appraisal, if one exists, can also support the land to building value allocation. Property tax records and any available floor plans round out the picture of the physical asset.
Lease and Use Information
Because how a space is used affects how certain components are classified, information about current leases and the nature of the business operations within the building is often requested. This is particularly relevant for properties with specialized use, such as manufacturing facilities, medical offices, restaurants, or self storage facilities, where equipment and infrastructure tied to the operation may be treated differently than general building components.
Entity and Tax Information
Basic entity details, such as the ownership structure, EIN, and prior year tax returns, help ensure the study’s findings integrate correctly with existing filings. For properties held in a partnership or LLC, K-1s may also be relevant to how the benefit flows through to individual owners.
Photographs and Site Access
While not a document in the traditional sense, photographs of the interior and exterior (or, when possible, an on-site visit) allow the engineering team to verify conditions, confirm component types, and catch details that paperwork alone might miss. This step supports the defensibility of the final study if it’s ever reviewed by the IRS.
Previous Cost Segregation Studies
If a cost segregation study was performed previously on the property, whether by CSSI or another provider, that report should be shared as well. It helps avoid duplicating work already completed and ensures any new analysis, such as one prompted by a renovation, accounts for what has already been reclassified.
What If Some Documents Aren’t Available?
It’s common for property owners to be missing a document or two, particularly for older buildings or properties that have changed hands more than once. In most cases, this doesn’t stop a study from moving forward. CSSI’s engineering team is experienced in working with incomplete records, filling gaps through property inspections, cost estimating techniques, and publicly available data where appropriate. The goal at every step is a study that’s both thorough and defensible, so if something is missing, it’s worth raising early rather than assuming it will be a barrier.
Frequently Asked Questions
Do I need every document on this list before starting a cost segregation study?
No. These are the documents most commonly used, but a study can typically begin with whatever is readily available. CSSI will identify any additional information needed as the analysis progresses.
What if I don’t have the original closing statement for a property I’ve owned for years?
This is common for older acquisitions. In many cases, the depreciation schedule, county property records, or an original appraisal can help reconstruct the necessary cost basis information.
Is a site visit always required?
Not always, but it’s often recommended, especially for larger or more complex properties. A site visit allows the engineering team to verify conditions directly and strengthens the documentation supporting the study.
Who typically gathers these documents, the property owner or CSSI?
It’s a collaborative process. CSSI will provide a clear list of what’s needed and guide the owner or their accounting team through gathering it, rather than leaving them to guess what’s relevant.
Does new construction require different documentation than an existing property purchase?
Yes. New construction relies primarily on itemized construction costs, such as contractor invoices and pay applications, while an existing property purchase relies more heavily on the closing statement and prior depreciation records.
Talk to a Specialist
Every property’s documentation is a little different, and CSSI’s team can help identify exactly what’s needed for yours. Request a free analysis to get started and see what a cost segregation study could mean for your property.
