Buying a multifamily property well is less about finding the one magic question and more about asking the right questions in every area and then verifying each answer against records. The questions worth asking fall into four buckets: the financials, the physical condition, the legal and title picture, and the local market. Miss a bucket and you buy a blind spot.
This is general education for prospective and current owners, not investment, legal, or tax advice — run your specific deal past your own attorney, accountant, and lender. What follows is a walkthrough of the questions in each of the four areas, framed so you can take them into a real deal and verify the answers against actual records rather than the seller’s narrative.
Financial questions: rebuild the numbers from records
The financial questions exist to let you rebuild the building’s income and expenses from the ground up, rather than accept a polished summary. Ask for the current rent roll, the trailing income and expense statements, every lease, the deposit ledger, and the schedule of any concessions or rent specials in place. Those documents are the raw material; the seller’s pro forma is a story told about them.
With the records in hand, ask the questions that test them. How do the in-place rents compare to what units actually command in the submarket today? Which expenses did the seller pay directly, and which were passed through to tenants? Are any expenses suspiciously low — a maintenance line that looks too thin, or an insurance figure carried at a stale rate? The goal is to rebuild effective gross income and operating expenses from verified line items, because every downstream judgment about the deal rests on those inputs being real. The full mechanics of turning the rent roll into a cash-flow figure are in how to calculate cash flow on an apartment deal.
Physical-condition questions: find the deferred work
The physical questions are about what you are actually buying and what it will cost to keep running. Ask the age and condition of the roof, the major mechanical systems, the electrical service, the plumbing, and the building envelope. Ask what capital work has been done and when, what is deferred, and whether there is any history of water intrusion, mold, or pest problems.
Pair every answer with an independent professional inspection, because the seller’s account of condition and the building’s actual condition are not always the same thing. Deferred maintenance does not disappear when ownership changes — it becomes your capital budget. The condition picture also drives how the building is underwritten for insurance, since roof and system age, construction type, and loss history are exactly the inputs a carrier prices on. A building with an aging roof and a string of water claims is both a bigger capital project and a harder risk to place.
Legal and title questions: confirm clean ownership
The legal questions confirm you are buying clean ownership and not inheriting someone else’s problem. Ask for the title commitment, any existing survey, the list of recorded easements and liens, and the identity of the entity that holds the property. Ask about open building permits, outstanding code violations, pending or threatened litigation, and whether every unit is legally permitted at its current use.
These answers are best confirmed through your attorney and the title work rather than the seller’s summary, because the consequences of a missed lien or an unpermitted unit land on the buyer after closing. The rules around entity ownership, recording, and permitting vary by state — check your state’s requirements with local counsel rather than assuming the process matches a deal you did elsewhere. An owner buying across Indiana and Texas, for example, works under two different sets of local procedures.
Real-World Scenario: A buyer is comfortable with a building’s financials and condition and is ready to close. During the title review, the attorney flags an open permit from a years-old renovation that was never closed out, and a quick check shows two units were converted without the proper approvals. None of it appeared in the seller’s package. The buyer pauses, has the seller resolve the permit and address the unpermitted units before closing rather than after, and avoids inheriting a code problem that would have surfaced the first time an inspector or a carrier looked closely. The financials never changed — a legal question that almost went unasked is what protected the deal.
Market questions: read the context around the building
The market questions place the building in its surroundings, because the same property performs differently depending on where it sits. Ask about vacancy trends and rent growth in the submarket, how much new supply is coming online nearby, the tenant profile the building draws, and the local cost drivers — property taxes, utility costs, and weather exposure — that shape the expense side.
The market context tells you whether the in-place numbers are durable or fragile. A building fully leased today in a submarket about to absorb a wave of new construction is a different risk than the same building in a supply-constrained market. For how lenders and investors frame multifamily market performance, the Mortgage Bankers Association’s commercial and multifamily research is a useful primary reference, though your read should always come back to the specific submarket the building sits in.
Where insurance enters the diligence questions
Insurance is not a separate fifth area so much as a thread that runs through the other four, which is why it belongs in the question set rather than as an afterthought at closing. The condition answers — roof age, system age, claims history — are the inputs a carrier prices on. The legal answers — entity, permitting, open violations — affect how cleanly the risk can be placed. And the financial answers depend on carrying a real insurance figure in the operating expenses rather than the seller’s stale number.
The practical move is to pull a current quote on the building during due diligence, while you still have leverage to renegotiate if the number comes back higher than the seller’s books suggested. That replaces a guessed operating-expense line with a verified one and surfaces any condition issue that would make the property hard to insure before you are committed. Start with the property insurance and general liability overviews to understand the lines, and see what insurance to line up before you close for the timing. The Insurance Information Institute is a useful primary reference on how habitational premiums are built.
Turn the questions into a verified picture
The four areas are simple to name; the discipline is in refusing to take any answer on faith. Collect the records, ask the questions that test them, and confirm each answer against the document, the inspection, the title work, or a current quote. A confident answer that does not match the paperwork is not a dead end — it is the most valuable thing diligence produces, because it is the problem you can still price or walk away from.
When you reach the insurance thread, get a real figure rather than a placeholder. The apartment building insurance overview lays out the lines, and the cost varies by location, which is why the conversation differs across Indiana, Florida, and Ohio. When you have a property under contract, start a quote or reach the agency so your diligence carries an accurate insurance number. The wider purchase walkthrough is in how to buy your first apartment building, and the closing-stage list lives in the due-diligence checklist before closing.