What is the difference between a Reserve Study and Structural Integrity Reserve Study?

If your association is based in Florida, or you follow condominium news at all, you've likely heard the term Structural Integrity Reserve Study, or SIRS. It sounds a lot like a standard reserve study, and the two are closely related, but they are not the same thing. 

One is a financial planning tool used by associations nationwide; the other is a legally mandated safety-focused study for certain Florida buildings. 

Here's how they compare, and how to know which one your community needs.

What Is a Standard Reserve Study?

A standard reserve study is primarily a financial planning tool. It helps associations plan for the repair and replacement of major common elements over time, such as pavement, painting, roofing, clubhouse equipment, fencing, and pool areas. The study estimates the useful life and replacement cost of each component, then recommends annual contributions to the reserve fund so the money is there when projects come due.

While not required in every state, a traditional reserve study is considered best practice across the industry. It supports accurate budgeting, helps boards avoid special assessments, and demonstrates that the board is meeting its fiduciary obligations. Requirements vary by state, so it's worth checking our state law guide to see what applies to your community.

What Is a Structural Integrity Reserve Study (SIRS)?

A Structural Integrity Reserve Study is a specialized type of reserve study that focuses on the safety and structural soundness of key building components. It became a legal requirement in Florida in 2022 under Senate Bill 4-D, passed in the wake of the tragic Champlain Towers South collapse in Surfside.

The law has evolved since then. Senate Bill 154 (2023) refined the framework, and House Bill 913, effective July 1, 2025, made further significant changes. Under the current version of Florida Statute 718.112, a SIRS is mandatory for condominium and cooperative buildings that are three or more habitable stories in height, and it must be repeated at least every 10 years. The initial compliance deadline, originally set for the end of 2024, was extended to December 31, 2025.

A SIRS must be performed by a licensed engineer or architect and must evaluate a defined list of structural and life-safety components, including the roof, load-bearing walls and primary structural systems, fireproofing and fire protection systems, plumbing, electrical systems, waterproofing and exterior painting, windows and exterior doors, and any other item exceeding $25,000 in deferred maintenance or replacement cost that affects those systems.

Critically, unlike traditional reserves, SIRS reserves cannot be waived or reduced by a membership vote. Associations must fund the components identified in the study, though HB 913 introduced some flexibility, allowing boards to use loans, lines of credit, or special assessments to meet funding obligations with the appropriate approvals.

The Key Differences at a Glance

The most important distinction is scope and purpose. A SIRS focuses exclusively on critical structural components that could impact safety, while a standard reserve study includes a broader range of items that contribute to the community's appearance and function. Pool furniture, signage, or tennis court resurfacing might appear in a standard reserve study, but they would never appear in a SIRS.

Other key differences:

• Legal status. A SIRS is a statutory requirement for qualifying Florida buildings; a standard reserve study is best practice nationwide but only mandated in certain states.
• Who performs it. A SIRS must involve a licensed engineer or architect. Standard reserve studies are prepared by qualified reserve specialists.
• Waivability. SIRS reserve funding is non-waivable. Traditional reserve contributions can, in some states and circumstances, be waived or reduced by owner vote.
• Frequency. A SIRS is required at least every 10 years, while a standard reserve study is typically updated every 3–5 years as a matter of good practice.

Does Your Association Need One or Both?

For many Florida condominiums, the answer is both. A SIRS satisfies the legal requirement for structural components, but it does not cover everything an association is responsible for maintaining. A standard reserve study fills that gap, capturing the non-structural assets that keep a community attractive and functional. Running both ensures the association is meeting its legal obligations and its broader financial planning needs. You can read more about Florida-specific timing rules in our guide to how often a Florida HOA should do a reserve study.

Ultimately, both studies serve important but different purposes: one protects lives and buildings, the other protects budgets and property values. If your condominium association needs help determining which study applies, or wants both handled by one experienced team, request a proposal from Reserve Study Group and our Florida office will be happy to assist.

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