Detroit multifamily investors aren’t just underwriting cap rates anymore—they’re underwriting tax strategy. In an environment where deal economics have become more constrained, depreciation has become one of the most actively used tools to improve after-tax cash flow and preserve deal viability.
Cost segregation is a tax strategy that accelerates depreciation by breaking a property into components (flooring, electrical, land improvements, etc.) and reclassifying portions of the purchase price into shorter recovery periods, often 5, 7, or 15 years instead of 27.5. The result is larger front-loaded deductions in the early years of ownership, improving cash flow when it matters most.
For investors buying duplexes, fourplexes, small apartment buildings, or mixed-use properties across Michigan, the decision isn’t just whether to do cost segregation; it’s who can produce a study that is defensible, accurate, and optimized for allowable deductions based on a proper engineering and tax framework.
The list below breaks down the top cost segregation firms for small multifamily investors in Detroit and Michigan, evaluated across the key factors that matter most (cost, turnaround time, technical depth, etc) to help you identify the right fit for your tax strategy.
1. SMF Cost Segregation Advisors
SMF Cost Segregation Advisors is a strong choice for small residential and “smaller-scale” multifamily investors, including short-term rentals, single-family rentals, duplexes, triplexes, fourplexes, and 1–10 unit properties.
The firm is designed specifically for owners who need a defensible, CPA-ready cost segregation study without the cost, complexity, or extended timelines often associated with large national engineering firms. Reports are typically turned around in less than 3 days, making SMF one of the fastest options in the space while still maintaining a structured, engineering-based methodology.
In addition, SMF has meaningful experience working with investors in the Detroit and broader Michigan real estate markets, where smaller multifamily assets and single-family rental portfolios are especially common. This regional familiarity helps ensure studies are aligned with local property profiles and investor needs.
SMF’s value proposition is centered on accessibility and efficiency, offering competitive pricing, rapid turnaround, and a streamlined process built specifically for smaller residential real estate portfolios that need clarity and speed without sacrificing defensibility.
2. KBKG
KBKG is a very well-established national firm in specialty tax consulting and cost segregation. Its cost segregation process is built around engineering-based analysis
In addition to cost segregation, KBKG provides related tax services such as repair versus capitalization studies, fixed asset reviews, and energy-related incentive work, including 45L and 179D. The firm also offers educational resources and calculators that help investors estimate potential tax savings across different property types.
For small multifamily investors, the primary appeal is the level of documentation and technical rigor. KBKG’s process typically incorporates site inspections, review of cost records, interviews, and structured reporting designed to support CPA review and audit readiness. For investors evaluating cost segregation providers in markets like Michigan, KBKG is often a stronger fit when the property has sufficient basis to justify a more formal engineering study and when a CPA prioritizes highly detailed, defensible documentation.
3. CORE Solutions Group
Core Solutions Group has a strong Michigan presence and is based in Bingham Farms, serving real estate investors, CPAs, and commercial property owners across the state and the broader Midwest. The firm operates in the specialty tax and cost recovery space, with services that include cost segregation studies, depreciation optimization, property tax analysis, energy-related incentives, and broader business incentive programs.
For Detroit and Southeast Michigan investors, that local footprint can be a practical advantage, particularly when working with CPAs or owners who prefer a regional firm with in-market familiarity. Core Solutions Group positions its work around identifying and documenting tax savings opportunities across multiple layers of a property, not just depreciation, but also incentives tied to improvements, utilities, and energy efficiency initiatives
For small multifamily owners who are renovating, upgrading systems, or actively managing operating expenses, Core’s broader approach can be appealing because it looks beyond a standalone cost segregation study and toward a more holistic view of property-level tax and savings opportunities.
4. Rehmann
Rehmann is a Michigan-based professional services and advisory firm offering tax, audit, consulting, client accounting, technology, and wealth management services. While cost segregation is not positioned as a standalone or branded specialty service, the firm has the tax and advisory infrastructure typically used to support depreciation strategy and fixed asset planning within a broader CPA-led engagement.
Rehmann may represent the regional advisory model many investors still prefer – where property decisions, tax strategy, and compliance are managed within a familiar, locally grounded CPA environment rather than through a specialized national engineering firm.
5. Source Advisors
Source Advisors operates as a national specialty tax advisory firm rather than a standalone cost segregation shop. It works with real estate owners, CPA partners, and multi-state businesses that require support across a broader range of tax incentives and fixed asset strategies. Cost segregation is one component of its service offering, alongside real estate tax incentives, fixed asset consulting, property tax studies, energy-related incentives, and R&D tax credits.
This broader scope can be valuable for investors with more complex assets or portfolios—for example, properties that include mixed-use components, significant renovations, energy-efficient improvements, or more advanced disposition and planning considerations. In these cases, cost segregation is often most effective when integrated into a wider tax strategy rather than treated as an isolated exercise.
Source Advisors is best suited for investors who want a more technical, advisory-driven partner that connects depreciation strategy with broader tax planning, fixed asset management, and long-term portfolio optimization.
6. R.E. Cost Seg
RE Cost Seg is generally positioned as a mid-market, cost-segregation-focused provider. Unlike broad tax advisory firms (like KBKG or Source Advisors), they are more narrowly focused on real estate cost segregation studies. The firm states it has completed work on thousands of properties across all 50 states and emphasizes a streamlined workflow that includes virtual site reviews, engineering-based analysis, fixed asset schedules, and audit-ready reporting. Its service offerings span a range of property types, including residential rentals and apartment complexes.
For small and mid-sized investors in markets like Michigan, RE Cost Seg can serve as a middle-ground option between lower-cost, software-driven providers and larger national advisory firms.
7. Seneca Cost Segregation
Seneca Cost Segregation is a dedicated cost segregation provider focused exclusively on engineering-based studies, rather than offering a broader suite of tax consulting services. The firm emphasizes a structured process that typically includes property review (virtual or onsite as appropriate), asset classification, IRS-aligned reporting, post-study CPA coordination, and audit support. It also serves clients across all 50 states
For smaller and mid-sized real estate investors, Seneca’s stated eligibility guidelines can be a useful screening tool. The firm indicates that properties generally around $450,000 in value, or with approximately $500,000 in improvements, may be appropriate candidates for a study, particularly for owners planning to hold the asset for more than a few years. For investors in markets like Detroit and broader Michigan, this type of threshold-based guidance can help determine whether a cost segregation study is likely to be economically justified before committing to the engagement.
8. OverlineIQ
Overline IQ is a software-enabled cost segregation platform designed to streamline depreciation studies through a more standardized, technology-driven process. Rather than relying exclusively on traditional engineering workflows, the firm emphasizes digital data intake, remote property analysis, and fast report generation aimed at improving efficiency and reducing cost.
For investors, the primary advantage is accessibility. Overline IQ can be appealing to smaller landlords or price-sensitive owners who want a quicker, low-friction way to obtain a cost segregation study without engaging in a more complex, engineering-heavy process.
However, that efficiency-oriented approach comes with tradeoffs. Compared to traditional engineering-based firms, software-driven studies may offer less depth in on-site inspection and granular asset-level classification. Investors with more complex properties, higher purchase prices, significant renovations, or heightened audit sensitivity may prefer firms that rely more heavily on detailed field engineering and customized analysis.
In short, Overline IQ fits best as a modern, tech-forward option within the cost segregation landscape—well-suited for straightforward properties and cost-conscious investors, but less aligned with those prioritizing highly detailed engineering studies and maximum documentation depth.
9. Cost Seg Smart
Cost Seg Smart is best understood as a software-enabled, lower-cost entrant in the cost segregation space, positioned primarily around speed and accessibility rather than high-touch engineering depth.
The firm fits well within a broader spectrum of providers, from premium engineering-heavy firms to mid-tier specialty providers and finally to more streamlined, technology-driven options. In that context, Cost Seg Smart is typically most relevant for smaller landlords and price-sensitive investors who are prioritizing affordability and faster execution over highly customized advisory engagement
Because of its more software-forward and standardized approach, it may be a practical option for straightforward properties or investors looking for a simplified entry point into cost segregation. However, it may be less aligned with investors who prioritize deeper field engineering work, in-person site inspection rigor, and highly granular asset classification typically associated with more traditional engineering-based studies.
Takeaway
Ultimately, cost segregation is less about finding the “best” firm and more about matching the right level of service to the right property. In Michigan multifamily investing, providers generally differ by approach. Some focus on speed and accessibility, others on engineering depth and documentation, and others on broader tax and incentive planning.
Smaller, straightforward rentals may only require a streamlined study to unlock meaningful tax benefits, while higher-value or more complex assets often justify deeper engineering work and stronger audit support. For some investors, the greatest value comes from a broader advisory relationship that integrates cost segregation into overall tax strategy.
In a market where after-tax cash flow drives performance, the right choice is the one that best aligns with property complexity, CPA expectations, and investor goals.
