In one paragraph
Madison SPECS is an engineering-led cost segregation firm headquartered in Lakewood, NJ, serving commercial and multifamily property in all 50 states. Madison SPECS sends one of its in-house engineers on-site for every study, publishes a typical fixed fee of $4,000–$11,000 (per their FAQ), and targets investment property worth at least $1,000,000 or a renovation of at least $750,000, across hotel, industrial, multifamily, office, retail, senior-living and specialty property. It does not publish a turnaround time; its marketing describes a rapid one. Cost Seg Smart is built for residential and small-commercial property, SFR, STR, condo, multifamily 2–4 unit, and small office/retail, using MACRS classification applied to structured property data and industry-standard construction cost data instead of an on-site visit. Studies start at $495 and are usually delivered the next business day.
Disclosure: Cost Seg Smart operates this comparison and is one of the firms compared here. Statements about Madison SPECS are sourced to their own public site (madisonspecs.com) and were verified on 2026-09-22. See the methodology page for our standalone documentation.
Cost Seg Smart in brief
- Cost Seg Smart is an engineered cost segregation provider for residential, short-term-rental, multifamily and commercial property, with residential studies from $495 and commercial from $1,995.
- Cost Seg Smart delivers most residential studies the next business day, remotely, using remote observation together with industry-standard 2026 construction cost data.
- Cost Seg Smart classifies components under MACRS per Rev. Proc. 87-56 and documents every study against the 13 quality elements of the IRS Cost Segregation Audit Techniques Guide (Pub 5653), including Form 3115 §481(a) catch-up schedules for properties owned two or more years.
- Cost Seg Smart prices a sub-$300K residential study at $495 and delivers it usually by the next business day; Madison SPECS publishes a typical fixed fee of $4,000 to $11,000 (per their FAQ) for property worth at least $1,000,000 or a renovation of at least $750,000, and does not publish a turnaround time.
At a glance: residential $500K STR comparison
| Dimension | Cost Seg Smart | Madison SPECS |
|---|---|---|
| Price (residential $500K) | $895 | Below their published eligibility floor ($1M property value or $750K renovation) |
| Price (commercial $3M) | $4,995 | $4,000–$11,000 typical fixed fee, quoted per property (per their FAQ) |
| Turnaround | Usually the next business day | Not published (they market a “rapid turnaround”) |
| Site visit | No (remote observation) | Yes (engineer on-site) |
| Methodology | industry-standard 2026 construction cost data + MACRS | On-site engineer visit + FASB-guided asset classification (per their site) |
| Property focus | Residential, STR, small MF, small commercial | Commercial and multifamily: hotel, industrial, office, retail, senior living, specialty |
| Form 3115 lookback | Included | Included |
| Best fit | Under $5M, residential, STR, small MF | Commercial and multifamily worth $1M+ where you want an engineer on-site |
Methodology overlap (both firms)
Both firms classify a building's components into shorter recovery periods. Where they overlap:
- Cost basis. Cost Seg Smart uses industry-standard 2026 construction cost data calibrated by regional cost multipliers. Madison SPECS describes its process as engineers and accountants identifying and valuing assets following FASB guidelines; its site does not describe a cost-data library.
- MACRS classification per Rev. Proc. 87-56 for asset class lives (5-, 7-, 15-, 27.5-, or 39-year recovery).
- IRS Cost Segregation Audit Techniques Guide (Pub 5653): Cost Seg Smart documents every study against its 13 quality elements; Madison SPECS's FAQ advises choosing a qualified firm that follows the ATG.
- Form 3115 §481(a) lookback support for properties owned 2+ years without a prior cost-seg study.
- A reviewed deliverable — Madison SPECS's study follows an on-site tour by one of its in-house engineers; Cost Seg Smart includes internal technical review & QC on every report.
The difference is what feeds the methodology. Madison SPECS sends one of its engineers to the property to take measurements and photographs and observe the building first-hand. Cost Seg Smart uses structured property data, county assessor records, RentCast property API, OSM building classification, satellite imagery, and the industry-standard construction cost library applied algorithmically. For commercial properties with specialty assets that aren't well-represented in public data, the on-site approach captures details ours can't. For typical residential and small-commercial, the structured-data approach produces the same MACRS classification result.
Where Cost Seg Smart wins
- Residential rentals. Madison SPECS's published eligibility floor is a property worth at least $1,000,000 (or a $750,000 renovation), and its site lists no single-family or short-term-rental category, so a $400K SFR or $750K STR falls below it. We're built specifically for that segment; studies start at $495.
- Small multifamily and small commercial. Our commercial studies start at $1,995, against Madison SPECS's published typical range of $4,000–$11,000. For typical small commercial without specialty assets, structured-data analysis produces the same MACRS classification without scheduling a site visit.
- Portfolio investors with multiple residential properties. Each property is a fresh order, usually delivered the next business day, from $495. Most single-family rentals in a residential portfolio fall below Madison SPECS's published $1M eligibility floor.
- STR owners on event-driven properties. The high-FF&E-density properties (Pacific Beach, Old Town Scottsdale, East Austin, Joshua Tree) are exactly where engineering-grade cost-data classification matters. We score them the same way; pricing is residential-tier.
- Speed-sensitive filings. next-business-day turnaround in most cases; Madison SPECS does not publish a turnaround time, and its schedule includes an on-site visit. If your CPA needs the schedule for a return that's already in extension, we deliver in time.
Where Madison SPECS wins
- Commercial and multifamily property worth $1M+. Office, industrial with specialty MEP, hotels, senior living and specialty property, these benefit from on-site engineering judgment that captures custom assets and specialty construction not visible in public data.
- Ground-up commercial new construction. When the building was custom-built recently, engineering observation of the actual construction details (vs. relying on assessor records that may not reflect the new build) materially affects the schedule.
- Specialty industrial and manufacturing. Custom equipment, process plumbing, specialty electrical, these are exactly the cases where on-site engineering is genuinely necessary, not optional.
- Hospitality and resort properties. Food-and-beverage build-out, FF&E in guest rooms, specialty fixtures, the on-site engagement model captures details a remote analysis may not see.
- Properties where you specifically expect IRS examination. If the property is large enough that you want the firm whose engineer toured the building behind the study, Madison SPECS's site says that if a study is challenged, its team will back it up.
How to decide
Three questions to ask:
- Is it commercial or multifamily property worth $1M+ with specialty assets, hospitality, or ground-up commercial new construction? → Madison SPECS.
- Does the property have unusual MEP, custom finishes, or specialty industrial equipment that requires on-site engineering judgment? → Madison SPECS.
- Otherwise (residential, STR, small MF, typical small commercial)? → Cost Seg Smart. Remote analysis, a lower study fee, next-business-day turnaround in most cases.
If you want to see the math on a specific property before deciding, our free calculator gives a Year-1 estimate in 30 seconds. Full methodology details are at /methodology/, pricing tiers at /cheap-cost-segregation/.
costsegregationreviews.com, a review site we operate, tracks how major firms differ on methodology, Madison SPECS included.
Last reviewed: 2026-09-22. Maintained by the Cost Seg Smart Editorial Team. Madison SPECS is a trademark of its owner. No affiliation. This comparison is informational; facts about Madison SPECS are taken from madisonspecs.com as of 2026-09-22. Confirm pricing and scope directly with each vendor.