Expert Cost Seg (O'Connor) Review (2026)
Expert Cost Seg (O'Connor) is a Boutique cost segregation firm offering IRS-compliant cost segregation studies. Every credible study — Expert Cost Seg (O'Connor)'s included — must classify components into MACRS 5, 7, 15, 27.5, and 39-year recovery periods under Rev. Proc. 87-56 and follow the engineering-based approach set out in the IRS Cost Segregation Audit Techniques Guide (Pub 5653), distinguishing §1245 personal property from §1250 real property before §168(k) bonus depreciation and Form 3115 (§481(a) catch-up) come into play. Published turnaround is preliminary analysis within one business day by email, and pricing is not published on the firm's site. What differs across providers is price, site-visit requirement, and audit-defense scope — not the underlying framework.
Editorial note: Cost Segregation Reviews is operated by Cost Seg Smart, which appears as one of the providers evaluated on this site. Public-facing data only — pricing, methodology, and credentials reflect what each provider publishes. Facts on this page verified September 6, 2026.
| Category | Boutique cost segregation firm |
|---|---|
| Pricing | not published on this page — seed's "From $500" not found; site offers a firm cost quote after a free preliminary analysis |
| Turnaround | Preliminary analysis within one business day by email |
| Methodology | Engineering-based approach, stated as "the IRS preferred methodology" |
| Site visit | Yes — "An appraiser inspects the property to identify eligible items" |
| Audit support | "Should IRS questions arise, we will defend our studies at no additional charge"; studies "warrantied for the duration of your ownership of the asset studied" |
| Guarantee | Audit defense at no additional charge; study warrantied for duration of ownership (not a money-back guarantee) |
| Property types | Apartments, hotels/motels, office, retail, medical, restaurants, auto dealerships, warehouses, storage, assisted living, manufacturing, banks, private schools, REITs, green buildings |
| Headquarters | TX |
| Offices | Serving all 50 states plus international clients; specific addresses not published |
| Founded | not published |
Pricing detail
not published on this page — seed's "From $500" not found; site offers a firm cost quote after a free preliminary analysis
Pricing reflects what Expert Cost Seg (O'Connor) publishes as of September 6, 2026; a specific quote may differ by property. Cost Seg Smart prices residential cost segregation studies starting at $495 for properties under $300,000, published at costsegsmart.com/pricing. For context on typical rates, see our guide to how much a cost segregation study should cost.
Methodology and process
Expert Cost Seg (O'Connor) describes its methodology as follows: Engineering-based approach, stated as "the IRS preferred methodology" All US cost segregation studies — including this one — must follow the engineering-based methodology described in the IRS Cost Segregation Audit Techniques Guide and apply MACRS classification per Rev. Proc. 87-56. The framework is set by federal law; what varies across providers is execution depth, documentation, and audit defense scope.
Property-type fit
Expert Cost Seg (O'Connor) publishes coverage for: Apartments, hotels/motels, office, retail, medical, restaurants, auto dealerships, warehouses, storage, assisted living, manufacturing, banks, private schools, REITs, green buildings. For investors comparing providers by property type, see our commercial providers and warehouse and industrial providers rankings.
Audit defense
Audit support: "Should IRS questions arise, we will defend our studies at no additional charge"; studies "warrantied for the duration of your ownership of the asset studied". Guarantee: Audit defense at no additional charge; study warrantied for duration of ownership (not a money-back guarantee). Audit defense scope varies materially across providers, ranging from explicit IRS representation to no defense beyond report delivery — see the scoring methodology for how we evaluate this dimension.
Pros
- States a guarantee: Audit defense at no additional charge; study warrantied for duration of ownership (not a money-back guarantee)
- Describes an engineering-based or IRS-aligned methodology on its site
- Publishes property types served: Apartments, hotels/motels, office, retail, medical, restaurants, auto dealerships...
Cons
- Pricing is not published; requires a direct quote request
- Limited public information beyond the firm's own marketing pages
- No independent, verifiable review or ratings data found
Verdict — who this is for
Expert Cost Seg (O'Connor) is best suited to owners of the property types it publishes — Apartments, hotels/motels, office, retail, medical, restaurants, auto dealerships, warehouses, storage, assisted living, manufacturing, banks, private schools, REITs, green buildings — who are comfortable requesting a direct quote rather than seeing pricing published online, and who want an engineering-based study consistent with IRS Pub 5653. For investors comparing alternatives, the full provider comparison table is on the homepage.
FAQ
How much does Expert Cost Seg (O'Connor) charge?
not published on this page — seed's "From $500" not found; site offers a firm cost quote after a free preliminary analysis
How long does a Expert Cost Seg (O'Connor) cost segregation study take?
Preliminary analysis within one business day by email
Does Expert Cost Seg (O'Connor) require an on-site visit?
Yes — "An appraiser inspects the property to identify eligible items" The IRS Cost Segregation Audit Techniques Guide (Pub 5653) does not require an on-site visit; it requires engineering-based methodology with documented support.
Sources
- https://expertcostseg.com — accessed September 6, 2026
- IRS Cost Segregation Audit Techniques Guide (Pub 5653)
- Rev. Proc. 87-56
All provider facts on this page were verified against Expert Cost Seg (O'Connor)'s own published pages as of September 6, 2026; fields not published by the provider are marked “not published” rather than estimated.
Expert Cost Seg (O'Connor) is one option among the providers we track. For other situations:
Pricing and operational details reflect public information as of September 6, 2026. Provider corrections welcome via the submission form. This review is not legal, tax, or financial advice — confirm cost segregation suitability with your CPA before ordering a study.