MotionCRE Editorial
Written by the MotionCRE team.
Published July 1, 2026
A buy box is the written set of criteria a real estate investor uses to decide which deals to pursue, covering asset class, target markets, deal size, physical profile, and minimum return thresholds. In commercial real estate acquisitions it works as the screening filter: a deal that fits the box moves to underwriting, and a deal outside it gets declined in minutes. Firms also share the buy box with brokers so incoming deal flow arrives pre-filtered.
The dimensions of a buy box
A buy box turns an investment strategy into numbers a deal either hits or misses. Seven dimensions cover nearly every CRE version:
- Asset class and subtype: not "multifamily" but "garden and mid-rise multifamily," not "industrial" but "shallow-bay infill under 150K SF"
- Markets: specific metros or submarkets, with the reasoning written down so the list can be defended and revised
- Deal size: total capitalization or purchase price range, usually set by equity check size and lender appetite
- Physical profile: vintage, unit count or square footage, construction type, site characteristics
- Return thresholds: minimum going-in cap rate, target IRR, equity multiple, stabilized cash-on-cash
- Risk parameters: maximum vacancy, tenant concentration limits, lease-up or entitlement exposure
- Exclusions: the explicit "never" list, such as flood zones, ground leases, or unstabilized lease-ups
The exclusions earn their place. Most screening time dies on deals that are close but wrong, and a written "no high-rise, no pre-1980, no deals under $15M" ends those conversations in one sentence instead of one meeting.
An example buy box: value-add multifamily fund
Here is what a complete buy box looks like for a hypothetical value-add multifamily fund buying in Texas Sun Belt metros in mid-2026, with the criteria anchored to real market data.
| Dimension | Criteria |
|---|---|
| Asset class | Garden or mid-rise multifamily, 150 to 300 units |
| Vintage | 1985 to 2015 |
| Markets | Dallas-Fort Worth, San Antonio, Houston suburban submarkets |
| Deal size | $25M to $60M total capitalization |
| Price basis | At or below $175K per unit |
| Going-in cap rate | 5.5 percent or better on in-place NOI |
| Rent assumption | Year-one rent growth underwritten at 0 percent |
| Returns | 15 percent deal-level IRR, 1.7x equity multiple, 6 percent cash-on-cash by year 3 |
| Risk limits | Physical occupancy 85 percent or better; no lease-ups; no flood zone |
Every number encodes a market view. The $175K per unit ceiling sits just under the DFW median sale price of $175,300 per unit that Northmarq reported for Q1 2026, so the fund is deliberately buying at or below the middle of the market. The 5.5 percent cap floor is set between the two published reads on the same market, Northmarq's transaction average of roughly 5.25 percent and Matthews' 5.8 percent, which forces the fund to buy above the cheaper survey's average yield. The flat year-one rent assumption reflects Yardi Matrix data showing national advertised rents grew just 0.2 percent in Q1 2026, the weakest March since 2012, with supply-heavy Sun Belt metros still negative. And the 85 percent occupancy floor is a real constraint in a metro where Matthews pegs overall vacancy at 12.2 percent with concessions widespread.
That is the test of a real buy box: each criterion traces to either the fund's capital structure or a current market fact, so when the data moves, the box moves with it.
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Why explicit buy boxes change screening
Screening without a buy box is re-deriving strategy on every deal. Each OM triggers the same debate about whether the firm buys this kind of thing, and the debate consumes the people whose time is most expensive. Screening with a buy box is a checklist: five to ten criteria, each answerable from the OM's summary pages in a few minutes.
The arithmetic compounds. A team seeing 15 deals a month spends 8 to 20 hours a month screening if each first pass takes 30 to 80 minutes of ad hoc discussion. The same 15 deals against a written box take 10 to 15 minutes each, roughly 3 hours, and the decisions are consistent regardless of who runs them. That consistency is the underrated half: a buy box means the answer to a borderline deal does not depend on which partner opened the email, and it gives the screening workflow a definition of done.
The box also sharpens what "no" means. A pass recorded as "outside buy box: sub-150 units" is a data point; twenty of them in a quarter tells you brokers have the wrong idea of what you buy, or that the box no longer matches the market's actual supply of deals.
How brokers use your buy box
A buy box is a sourcing tool the moment it leaves the building. Brokers maintain buyer lists and match listings against what they know each buyer wants, so a firm with a specific, memorable buy box gets matched accurately, and a firm that "looks at everything" gets everything, which is the same as being matched by nobody.
The practical move is a one-sentence version brokers can repeat: "150 to 300 unit garden multifamily, 1985 or newer, DFW and San Antonio, $25M to $60M, value-add." That sentence pre-filters deal flow before it reaches your inbox, which is the cheapest screening there is. It also improves the deals you do see, because a broker who trusts your criteria will flag the near-misses honestly instead of packaging everything as a fit.
The cost of sharing is discipline. A firm that publishes a box and then chases deals outside it teaches brokers the box is decoration, and the filtering benefit evaporates.
Buy box vs investment criteria vs mandate
The three terms describe the same idea at different altitudes, and mixing them up causes real friction between principals, analysts, and capital partners.
The mandate is the formal authorization: what the fund documents, separate account agreement, or investment committee permit the team to buy. It is binding, changes rarely, and is usually broad ("multifamily and mixed-use in the southern U.S., $20M to $100M").
Investment criteria is the strategy statement, the language of the pitch deck: value-add multifamily in high-growth Sun Belt metros, targeting mid-teens returns.
The buy box is the operational reduction: the strategy converted into screenable numbers. It changes as markets move, always inside the mandate's boundaries. The hierarchy matters because a deal can satisfy the mandate, sound like the strategy, and still fail the box, and that deal should die in screening. Teams that let "it fits the mandate" override "it misses the box" have quietly deleted their screening layer. For the process of building one from scratch, see how to create a buy box for CRE acquisitions.
Where the buy box lives day to day
A buy box only works if it sits where screening happens, and at most firms it lives in a partner's head, which means screening waits on that partner. Writing it down is step one. Step two is putting it in the system that holds the deals, so applying it is part of logging a deal rather than a separate ritual.
In MotionCRE, each incoming offering memorandum becomes a deal in the screening stage, and the pipeline board filters by asset class, deal size, and assignee, with custom fields carrying box criteria like price per unit and going-in cap rate on the deal record. A deal that fails gets moved to dead with the criterion it missed as the reason, which is how the box accumulates evidence about itself. Over a year, the dead-deal log becomes the honest record of whether your buy box matches the market you actually operate in.
Browse more playbooks, templates, and definitions in the MotionCRE resource library.