In one paragraph
ELB Consulting, Cost Segregation Services Inc. (CSSI), and Bedford Cost Segregation are three established mid-tier traditional cost-seg firms. All three use the same RSMeans 2024 cost data, MACRS classification per Rev. Proc. 87-56, and IRS ATG framework Cost Seg Smart uses. The mid-tier firms run on-site or hybrid engagement models with 3–6 week turnaround and residential cost-seg pricing in the $3,000–$8,000 range. Cost Seg Smart applies the same methodology to structured property data (county assessor records, satellite imagery, RentCast, OSM, RSMeans) and delivers in under 60 minutes at $495–$1,895. For owners who specifically want a small-firm relationship with on-site engineering, the mid-tier firms are a credible choice. For owners who want fast, defensible, and dramatically more affordable, Cost Seg Smart fits.
At a glance: residential $500K STR comparison
| Dimension | Cost Seg Smart | ELB / CSSI / Bedford |
|---|---|---|
| Price (residential $500K) | $795 | ~$3,000–$8,000 typical |
| Turnaround | Under 1 hour | 3–6 weeks typical |
| Site visit | No (remote observation) | Often yes (varies by firm) |
| Methodology | RSMeans 2024 + MACRS | RSMeans + MACRS |
| Engineer attestation | Yes | Yes |
| Audit defense | Free CPA response if examined | Included (varies by firm) |
| Form 3115 lookback | Included | Included |
| Best fit | Residential, STR, small MF, small commercial | Mid-market commercial, small-firm relationship |
Methodology overlap (all four)
The technical machinery is the same across Cost Seg Smart, ELB Consulting, CSSI, and Bedford. All four use:
- RSMeans 2024 construction cost data as the primary $/SF cost basis with regional cost multipliers.
- MACRS classification per Rev. Proc. 87-56 — asset class lives for 5-, 7-, 15-, 27.5-, or 39-year recovery periods. Rev. Proc. 87-56 is incorporated into IRS Pub. 946 Appendix B.
- IRS Cost Segregation Audit Techniques Guide (Pub 5653) — the 13-element quality framework defining what a defensible study contains.
- Form 3115 §481(a) lookback support for properties owned 2+ years without a prior cost-seg study.
- Licensed engineer attestation on every report.
Where they differ is the labor model. ELB Consulting, CSSI, and Bedford are smaller specialty engineering firms that retain a traditional engagement structure — discovery call, often an on-site engineer visit, manual report drafting, 3–6 week timeline. Cost Seg Smart standardizes that work using structured property data and applies engineer review to outliers via a 16-check QC gate. The deliverable from any of these firms is a 30–45 page CPA-ready PDF that addresses the same IRS quality framework.
Where Cost Seg Smart wins
- Price. $795 vs. $3,000–$8,000 for the same defensible report on a typical residential property. Even in the most favorable mid-tier pricing, the differential exceeds the Year-1 ROI on many properties under $400K.
- Speed. Under 60 minutes vs. 3–6 weeks. Materially affects the math when your CPA needs the schedule for a return that's already in extension.
- Residential fit. Most mid-tier firms are commercial-leaning even when they take residential — the engagement structure (discovery call, scheduled engineer visit) is built for $1M+ commercial properties. Our pricing tier and structured-data workflow are built specifically for residential and small-commercial.
- STR portfolio scaling. If you're running 5+ short-term rentals, ordering 5+ separate engagements at $3K–$8K each isn't economic. Each Cost Seg Smart order is independent, ~60 minutes, $795–$1,295.
- CPA-ready guarantee. If your CPA flags a format issue, we revise at no charge. If we can't resolve it, full refund. Mid-tier firm revision policies vary.
Where ELB / CSSI / Bedford win
- You want a small-firm engagement relationship. If you're a mid-market commercial owner who values having a named project manager and direct access to the licensed engineer who signed your report, the mid-tier firms deliver that white-glove experience.
- Properties with unusual non-public construction details. Recent custom builds, specialty MEP, ground-up commercial — on-site engineering captures details a remote pipeline can miss. The mid-tier firms run that engineering observation.
- Mid-market commercial $1M–$5M. Above $5M, the major firms (KBKG, Madison SPECS, ETS) are typical. Below $1M, automated providers like us are typical. The $1M–$5M commercial sweet spot is where mid-tier firms are most directly competitive.
- Long-standing CPA relationships. Some CPA firms have referral relationships with specific mid-tier cost-seg firms. If your CPA prefers ELB or CSSI for documentation-style reasons, that's a legitimate fit consideration.
- You value mid-tier brand recognition. ELB, CSSI, and Bedford have been in the cost-seg market for 15+ years and are well-known to the IRS examiners and CPA community. Brand recognition is sometimes a tiebreaker, even if the methodology is the same.
How to decide
Three questions to ask:
- Is the property mid-market commercial $1M–$5M with non-public construction details that benefit from on-site engineering? → ELB / CSSI / Bedford.
- Do you specifically value a small-firm engagement relationship with named project management? → ELB / CSSI / Bedford.
- Otherwise (residential, STR, small MF, small commercial under $1M, or you want fast and affordable on a typical property)? → Cost Seg Smart. Same methodology, dramatically lower study fee, faster turnaround.
If you want to see the math on a specific property, our free calculator gives a Year-1 estimate in 30 seconds. Full methodology details are at /methodology/, pricing tiers at /cheap-cost-segregation/.
For a broader provider review covering CSSI, Bedford, ELB, and other mid-tier firms, costsegregationreviews.com is the editorial reference — useful as a cross-check, not a funnel.
Last reviewed: May 2026. Maintained by the Cost Seg Smart Editorial Team. ELB Consulting, Cost Segregation Services Inc. (CSSI), and Bedford Cost Segregation are registered trademarks of their respective holders. No affiliation. This comparison is informational; all firms produce IRS ATG-aligned engineered cost segregation studies. Confirm pricing, scope, and current engagement terms directly with each vendor.