Cost segregation for mixed-use buildings
A mixed-use building is really two or three properties stacked on one parcel, and the reclassification blends by area. A short-life-rich retail or restaurant ground floor pulls the number up; conservative upper-floor residential finishes pull it down. That is why the modeled range is wide — 5–32%, centering around 12% — and why the discipline is in weighting each use by gross building area rather than reaching for a single figure.
| Modeled reclass range | 5–32% (central ~12%) |
|---|---|
| Typical study fee (Cost Seg Smart) | From $1,995 |
| Recovery periods captured | 5-, 7- and 15-year vs the 39-year shell |
| Delivery | Engineering-based; virtual or on-site depending on the provider |
1What reclassifies in a mixed-use buildings
In a mixed-use, cost segregation typically reclassifies 5–32% of depreciable basis out of the 39-year building shell into 5-, 7- and 15-year property (modeled central tendency near ~12%). The components that recur:
| Component | Recovery period | Authority carried (with caveat) |
|---|---|---|
| Ground-floor retail/restaurant build-out — storefronts, dedicated kitchen equipment, feature finishes | 5- or 15-year | Commercial fit-out and business equipment may qualify depending on whether items are tenant-specific and removable rather than building structure. |
| Upper-floor residential finishes — unit flooring, cabinetry, appliances | 5-year | Residential unit finishes may qualify depending on how they are installed; the split is applied conservatively and depends on the facts of attachment. |
| Shared parking & podium — structured or grade parking serving both uses | 15- or 39-year | Parking classification depends on whether it is a surface land improvement versus structural podium integral to the building. |
| Common-area finishes — lobby, corridor and amenity flooring, décor lighting | 5- or 15-year | Common-area décor finishes and non-general lighting may qualify depending on function and permanence. |
| Site improvements — plaza paving, landscaping, exterior lighting, signage | 15-year | Site elements are generally land improvements depending on their separation from the building and permanence. |
| Supplemental & tenant HVAC — restaurant make-up air, retail dedicated units | 5-year | Conditioning dedicated to a specific commercial tenant load may qualify depending on whether it serves equipment or the building. |
2Typical results and what drives the spread
Across standardized mixed-use configurations, the engine models an accelerated share of roughly 5–32% (central tendency near ~12%). Where a building lands in the 5–32% modeled range (central tendency near 12%) depends on the mix: more commercial and restaurant area moves it up, more residential area moves it down. These are modeled ranges, not a promise for any specific building — see by the numbers.
3By the numbers (original data)
4What a study costs for this type
Study fees track building size, documentation quality and whether an on-site inspection is performed. Cost Seg Smart's own fee for this type starts at From $1,995 (published, pulled from its pricing system). See the pricing guide for current market bands; competitor fees are sourced there, not quoted in prose here.
5Provider comparison — the Top 5 for this asset class
Every provider below is scored on the same fixed rubric, weighting relevant mixed-use evidence most heavily. Facts are drawn from each provider's public materials and dated.
| Provider | Score* | Relevant mixed-use evidence | Profile | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RE Cost Seg Engineering-first · National (Houston, TX) Best published pricing Best for virtual delivery Most transparent turnaround | 7.9How this score is built (sub-score ÷ 5 × weight):
| Generic coverage only source · as of Jul 2026 | Profile → | ||||||||||||||||||||||||||||||||
| Cost Seg Smart site owner Engineering-first Best published pricing Best for virtual delivery | 7.8How this score is built (sub-score ÷ 5 × weight):
| Generic coverage only source · as of Jul 2026 | Profile → | ||||||||||||||||||||||||||||||||
| Baker Tilly National accounting/advisory · National (Chicago, IL) Best for national on-site coverage Most transparent turnaround | 7.6How this score is built (sub-score ÷ 5 × weight):
| Generic coverage only source · as of Jul 2026 | Profile → | ||||||||||||||||||||||||||||||||
| Source Advisors Engineering-first · National (Fort Worth, TX) Best for national on-site coverage | 7.3How this score is built (sub-score ÷ 5 × weight):
| Generic coverage only source · as of Jul 2026 | Profile → | ||||||||||||||||||||||||||||||||
| Cherry Bekaert Engineering-first · National (Richmond, VA; #1 Southeast) Best for national on-site coverage | 7.2How this score is built (sub-score ÷ 5 × weight):
| Generic coverage only source · as of Jul 2026 | Profile → |
Top 5 of 22 firms scored for mixed-use. See every firm's full profile and per-type standing in the provider directory.
*Score is this site's published rubric output (0–10) for mixed-use, weighting relevant property-type evidence most heavily (see how we compare) — click any score for its build-up. It is not a customer rating and no reviews are used. Cost Seg Smart is the site owner and is scored on the same rubric.
6Is it worth it — break-even
Because the commercial floors can be short-life-rich, the benefit generally clears a study fee once combined basis is in the low seven figures, sooner for restaurant-heavy ground floors and where bonus depreciation still applies to the eligible basis.
7Frequently asked questions
Why is the range for mixed-use so wide?
Because each use classifies differently and the building is a blend. A restaurant or retail ground floor is short-life-rich, while residential upper floors are treated conservatively. The final percentage depends entirely on how much of the gross building area falls into each use.
Can the residential and commercial parts even be studied together?
Yes, but they are analyzed separately and then blended by area. Each use has its own classification logic — commercial fit-out versus residential finishes — and combining them without segregating first would produce a number that is neither defensible nor accurate.
Does a restaurant ground floor really change the outcome that much?
It can. Restaurant build-outs carry dedicated kitchen equipment, make-up air, grease systems, and heavy finishes — a lot of short-life property in a small footprint. A restaurant-anchored ground floor tends to pull the whole building's blended percentage upward.
Why keep the residential split conservative?
Residential finishes classify on their own facts, and overstating that split is exactly where a study loses defensibility. Keeping the residential portion disciplined protects the whole blended result, so the commercial gains are not undermined by an aggressive residential claim.
The building has one parking structure for everyone — how is that handled?
Shared parking is allocated across the uses it serves, and its classification depends on whether it is a surface land improvement or a structural podium integral to the building. A study apportions it rather than assigning it to one use.
Sources and authority consulted
- Rev. Proc. 87-56 (MACRS asset classes)
- IRS Cost Segregation Audit Techniques Guide (Pub 5653)
- Cost Seg Smart per-vertical component engine (modeled ranges + component authorities).
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