An apartment listing may present its unit count as a simple fact. A buyer divides the price by that number, compares the result with other properties, and begins building an underwriting model.
But what does the number actually count?
It could describe legally established dwelling units, apartments shown on a rent roll, separately rented rooms, student beds, or a mixture of buildings and configurations. A property can have several valid counts that answer different questions. It can also have inconsistent counts that conceal a material problem.
At Draymoor Ventures, we would resolve that distinction before using price per door to form an investment view. A rent roll tells us how ownership is presenting the rental operation. It does not, by itself, establish what the property is legally permitted to operate or how every space can be used.
Four numbers that should remain separate
A dwelling-unit count describes the apartments or homes that make up the property. Whether each is legally established and authorized for its existing use requires additional evidence.
A bedroom count describes the physical configuration inside those units. It can inform household suitability and leasing strategy, but a room's appearance does not establish that it is an approved bedroom for the proposed use.
A rentable-bed count describes capacity under a particular leasing model. Student housing may be marketed by beds because income is generated through separate bed leases. A conventional apartment rented to one household ordinarily has a different economic denominator.
A lease count describes the contracts in force. One apartment may have one lease covering several residents, several individual leases, or no active lease while it remains on a rent roll as an available unit.
These numbers can all be useful. They become misleading when combined without explanation. A buyer should know which number supports the asking price per unit, which supports projected revenue, and which is recognized by the relevant approvals and loan documents.
The wrong denominator changes the apparent basis
Consider a hypothetical property with 12 apartments, each containing three bedrooms. It has 36 bedrooms. Depending on its approved use and operating model, it might also have 36 separately rentable beds.
At a $1.8 million purchase price, the price is $150,000 per apartment and $50,000 per bedroom. Those calculations describe the same acquisition. Neither should be compared directly with the other.
If another property contains 20 conventional apartments at a $2 million asking price, its $100,000 price per apartment may appear less expensive. Whether it actually offers better value depends on unit size, rents, expenses, physical condition, demand, and the capital required. Comparing its price per apartment with the first property's price per bed would create a distorted conclusion before the analysis even begins.
The same problem appears in revenue projections. A three-bedroom apartment leased to a household for $1,500 per month is a different operating model from three separately leased beds at $600 each. The second arrangement produces $1,800 in scheduled monthly rent when every bed is leased, but may require different utilities, furnishings, management, leasing, turnover, and approvals.
The higher gross rent is a starting point for investigation. It does not establish the higher net return.
Start with a physical inventory
We would create a property inventory that identifies every building and rental space. Each apartment should have a unique identifier, its configuration, current use, physical condition, and position on the rent roll.
That inventory should be checked against a site visit and available plans. Otherwise, an apparent financial discrepancy may simply reflect inconsistent labels. An apartment called Unit 3 in one file may appear as 3A in another, while a converted storage area may be described as a rentable studio without clear supporting documentation.
The objective is one consistent map of the asset. We want to be able to connect a physical space to the relevant lease, income record, expense allocation, and evidence of its authorized use.
Units that are vacant, under renovation, held for staff, used for storage, or unavailable for another reason should remain visible. Removing them from one denominator while leaving their projected income in another can make a property appear stronger than it is.
Verify the permitted use through appropriate records
The legal and regulatory review should be conducted with qualified local counsel and the relevant authorities. Applicable requirements depend on the jurisdiction, building, and intended operation.
Potential evidence includes zoning and use approvals, certificates of occupancy where applicable, permits, approved plans, inspection records, rental registrations, and documentation supporting prior conversions. Assessor records can be useful context, but they should not automatically resolve a conflict with other records.
The important question is whether the existing spaces and intended leasing model are supported. A building with a long history of rent collection may still require clarification about a conversion, an added unit, or a proposed change in use.
If the evidence is incomplete, the buyer should establish what remains uncertain, who can resolve it, what the resolution may cost, and whether timing affects the transaction. An unresolved apartment should not silently become verified income in the acquisition model.
Connect each space to the actual contracts
Once the physical inventory is established, we would reconcile it with executed leases and collection records.
For conventional multifamily, that means understanding which apartments are leased, what each contract requires, who is responsible for utilities, and whether recorded collections support the rent roll. For a bed-based operation, the review also needs to connect each bed to its contract and identify vacant beds inside otherwise occupied apartments.
An apartment with one resident in a three-bedroom student configuration may be physically occupied while producing only a fraction of its intended rental income. That matters here because the unit, bed, and lease counts need to describe the same operation. An overall occupancy percentage cannot resolve an inconsistent inventory.
We would also examine whether the leases permit the operating arrangements presented in marketing. Separately leasing rooms, accommodating roommates under one contract, and renting an entire apartment are commercially different structures. The buyer needs a coherent understanding of the obligations being acquired.
Test whether the building can support another renter profile
A specialized configuration can perform well when its intended customers want it. It can be less flexible when demand changes.
For student-oriented housing, we would ask how the apartments might work for nonstudent households. Bedrooms of similar size, multiple bathrooms, shared kitchens, and limited living space may suit one leasing model better than another. The practical alternative should be assessed through the building itself and local demand, rather than assumed from the fact that it contains kitchens and bedrooms.
This does not mean every property needs to serve every renter. It means the buyer should understand how much of the income depends on a particular configuration and leasing structure. If adaptation would require capital work, new approvals, or a lower rent, those costs belong in the downside case.
Build the model only after the counts reconcile
When counts disagree, we would avoid choosing whichever number makes the acquisition appear most attractive. We would document the discrepancy and request supporting evidence.
The resolved inventory should then flow consistently through price per apartment, scheduled income, unit-turn costs, replacement reserves, management assumptions, and lender discussions. Bed-level metrics can remain useful for a bed-based operation, provided they are labeled clearly and compared with similar properties.
This work can feel administrative beside a discussion of cap rates or rental growth. It establishes what the buyer is actually evaluating. A valuation model cannot repair an inaccurate description of the asset.
For DV, the useful question is not simply how many doors appear in an advertisement. It is how many supported rental units exist, how those spaces generate income, and whether the intended operation can continue on a basis the buyer can verify.
A clear answer gives the rest of the underwriting a sound starting point. Without it, the apparent precision of price per door can conceal uncertainty about the property itself.