Partner Engineering and Science vs AEI Consultants
Side by Side
| Attribute | Partner Engineering and Science | AEI Consultants |
|---|---|---|
| What It Is | A national environmental and engineering consultancy whose Phase I Environmental Site Assessments are a fixture of lender closing checklists. Reports follow the current ASTM E1527-21 standard, the firm participated in creating and updating that standard, and its own page says it supports approximately one in five commercial real estate transactions nationwide, from a single site to a portfolio. | An environmental and building sciences consultancy performing Phase I Environmental Site Assessments to the current ASTM E1527-21 standard, customizable to lender requirements. The firm cites over thirty years of experience and a nationwide team, and it publishes a Phase I checklist and full sample reports, including an agency-lender sample, so a first-time buyer can read exactly what the product contains before ordering one. |
| Category | Closing Vendors | Closing Vendors |
| Pricing Model | Custom Pricing | Custom Pricing |
| What It Costs | No published pricing; engagements are scoped and quoted. The firm's Phase I page (read Aug 2026) describes the product and the standard but carries no rate card, which is normal for this vendor class. | No published pricing; scoped and quoted per engagement (site read Aug 2026). The checklist and sample-report pages are open, but the engagement still starts with a quote. |
| Best For | The Phase I your lender orders on any acquisition that includes real property, especially where a fueled, industrial, or dry-cleaning past use makes currency with the ASTM standard matter. If the deal is a leased-premises asset purchase, ask the lender whether a cheaper records search satisfies them first. | A buyer who wants to understand the Phase I before paying for one: the published checklist and sample reports make this the most readable vendor in the class, and the agency-lender work means the reports satisfy institutional reviewers. |
| Where It Fits | Diligence & Close the Deal | Diligence & Close the Deal |
| Our Verdict | The default national name for the Phase I on a lender's checklist; confirm who orders it before you hire them yourself. | Read their sample report before you order anyone's Phase I; hire them if your lender has not already chosen. |
| Pros |
|
|
| Cons |
|
|
Both rows were read at source: Partner Engineering and Science ↗ and AEI Consultants ↗.
Our take
Choose Partner when the lender is driving: its Phase I practice is a fixture of lender closing checklists, and reports follow the current ASTM E1527-21 standard. On many deals the bank will simply order from Partner's panel seat, which makes hiring your own copy a duplicated spend rather than a second opinion. That panel orientation is also the limit to hold. The firm is built for commercial real estate lenders, publishes no pricing or turnaround, and everything starts with a scoped quote, so on a small deal ask the lender first whether Partner is already in the file.
Choose AEI when you want to understand the Phase I before paying for one: it works to the same E1527-21 standard and customizes to lender requirements. It is the readable side of this pair, publishing the checklist and sample reports that show a first-time buyer what the engagement actually produces. Two limits decide it: the open checklist is content marketing, with pricing and turnaround still arriving only by quote, and its center of gravity is commercial real estate and agency lenders, so a small asset deal is its smallest work rather than its specialty.