Tenant Damage Before Closing: Selling an Occupied Rental

Tenant damage before closing is the single most underrated risk when you sell an occupied rental, and it concentrates in the exact deals you most need to get rid of — the ones bleeding cash every month with a long-term tenant who has nowhere to go. The tenant knows the sale ends their housing, and some of them act on that knowledge in the last 48 hours before closing.

Costas Themistocleous, a Long Island investor who built a multi-state portfolio out of wholesaling, lived through it twice on the same house: washcloths flushed to flood the basement, then concrete poured down the toilet the night before closing. He caught the second one because he drove over and checked the house himself instead of waiting for the buyer’s final walkthrough.

This article covers the economics that force these sales, what sabotage actually looks like, the two fail-safes that kept his deal alive, and how to underwrite so a surprise this size doesn’t take the whole year with it.

From the Real Estate Pros Show

This article draws on an interview with Costas Themistocleous of Xenia Group LLC on the Real Estate Pros Show, hosted by Issa Hanna.

The Economics That Force the Sale

Most occupied-rental disasters start with a property that should never have been held in the first place. Themistocleous took over his childhood home and discovered his mother had pulled a second mortgage against it to fund her dream home. The property collected just under $3,000 a month in rent. The mortgages came to $4,600 a month — before taxes and insurance.

That is a gap no rent increase closes. A $1,600+ monthly shortfall on a single-family in a mature neighborhood would require a rent jump of more than 50%, which the market will not give you and the tenant cannot pay. Refinancing out of it assumes equity that a second mortgage already consumed.

Compounding it: the house was old and had not been maintained. Themistocleous describes his parents’ approach to ownership as “very Slumlord-like.” Deferred maintenance is not a separate problem from the cash-flow problem — it is the same problem on a delay. Every year of skipped roof, plumbing, and mechanical work becomes a capital number that lands the moment you try to sell or refinance.

The practical read for anyone sitting on an inherited rental property with a second mortgage: pull the full debt picture before you decide anything. Total monthly debt service, taxes, insurance, actual collected rent, and a realistic deferred-maintenance figure. If the first number beats the second by a four-figure margin and the house needs work, selling is not a failure of nerve. It is the arithmetic. Themistocleous was, in his words, hemorrhaging money — and the longer he held, the more the tenant relationship mattered to an exit he already needed.

Why Tenants Sabotage a Sale in Progress

From the tenant’s side, a listed property is an eviction notice with a longer timeline. A long-term tenant in a below-market unit knows that whoever buys it either moves in or raises the rent. Either outcome ends their situation, and no amount of good landlord behavior changes that math for them.

Themistocleous is explicit that he was not a bad operator here: “I did everything right by those tenants.” It happened anyway. That is the part worth internalizing. Sabotage risk is not a referendum on how you managed the lease — it is a function of what the tenant stands to lose.

Host Issa Hanna framed the two motives that drive it, and they call for different responses:

• Killing the sale. The tenant damages the property so the buyer walks or the lender’s appraisal falls apart, hoping the status quo survives. This escalates as closing approaches.
• Spite. The tenant knows the sale is happening regardless and wants the exit to cost you. This usually lands in the final days, when there is nothing left to lose.

Treat any occupied sale where the tenant has been in place for years and is paying under market as elevated risk, and treat the gap between contract and closing as the exposed window. The tenant has keys, unsupervised access, and a clear timeline — they were given notice of the sale. Plan the last two weeks accordingly rather than assuming a clean lease history predicts a clean closing.

The night before closing, I went to go check the house to make sure everything was good before final walkthrough. They somehow got back into the house, poured concrete down the toilet, and the pipes bursted, and there was a flood on the first floor.

— Costas Themistocleous, Xenia Group

What Actually Happened Between Contract and Closing

Two separate incidents hit the same property during the sale process, and the escalation between them is the instructive part.

Incident one: the basement flood. The first-floor tenant flushed washcloths down the toilet, which backed the line up and flooded the entire basement. This is cheap to do and expensive to fix — a full basement water event with contents, drywall, and mechanical exposure.

Incident two: the night before closing. The tenants got back into the house and poured concrete down the toilet. The pipes burst. The heat was still on, and the first floor flooded.

Read the timing. The second event was deliberately staged for the window between the buyer’s expectations and the closing table — late enough that there was no time to remediate, early enough to be discovered at the final walkthrough and blow up the deal. Concrete in a drain line is not a repair; it is a replacement of the affected plumbing, plus the water damage on top of it.

The only reason it did not detonate the closing is that Themistocleous went to check the house himself the night before the final walkthrough. He found it before the buyer did. That distinction decides whether you are handling a problem or defending against a buyer who just discovered a flooded first floor hours before signing — and who now has leverage over price, credits, and whether they close at all.

Also worth noting: the tenants “somehow got back into the house.” Access control after a move-out or notice is not a formality.

The Fail-Safes That Saved the Deal

Two things saved this closing, and neither was luck.

First, he inspected the property himself the night before closing rather than letting the buyer’s final walkthrough be the first set of eyes on it. Second, he had an existing relationship with his local ServPro owner — a personal friend who owed him favors and turned the first flood around fast and cheap. A restoration contractor you already know answers the phone on a Tuesday night. One you found on Google that morning gives you a quote in three days.

Build the same two protections into every occupied sale:

• Inventory who has keys. Current tenants, former tenants, the previous property manager, contractors, family members. Assume at least one unaccounted-for copy exists.
• Re-key after move-out or after notice. If the unit is vacated before closing, change locks the same day. Themistocleous’s tenants got back in after the fact.
• Walk the property yourself 24 to 48 hours before closing. Not your agent. You, or someone whose only job is to find problems.
• Know who you call at 10 p.m. Water mitigation, a plumber, and a board-up service, with numbers in your phone before you need them.
• Leave room in your net. If you are selling an occupied, cash-negative property, do not spend the proceeds before they hit. Hold back a remediation reserve through closing.

One more: if the heat is on and the property is vacant or partially vacant in winter, that is a burst-pipe multiplier. It was in this case.

Underwriting for the Unexpected, Not Just the Worst Case

Themistocleous runs a three-pass underwrite, and the third pass is the one most investors skip. Best case. Worst case. Then: “what do we think unexpected could happen” — and build in as many fail-safes as possible against it.

Worst case is a number you can model: full vacancy, max repairs, longest hold. Unexpected is a different category — it is the concrete in the toilet, the tenant with a key you did not know about, the lease that exists on paper and nowhere else.

His second cautionary story is the cleanest example. He put a deal together on a DSCR loan, and the occupancy needed to qualify came from pre-leases. The deal closed. Then, in his words, “out of nowhere, all these pre-leases disappeared.” The deposits carried one month. After that it was out of pocket for five to six months until he evened it out — and it was a larger unit in a small, rural market, so there was no depth of tenant demand to re-lease quickly.

Two rules come out of that:

• Income you have not collected is not income. A signed pre-lease with no move-in and no first month’s rent is an intention. Underwrite the property as if those units are vacant, and treat the pre-leases as upside.
• Market thinness is a risk multiplier, not a footnote. The same vacancy that costs you three weeks in a metro costs five or six months in a rural submarket. Price your reserves off the recovery speed of the market you are actually in, and oversize the unit’s reserve if it is the biggest floor plan in town.

Where These Problems Push Operators Next

Both of those episodes pushed Themistocleous in the same direction: toward deal structures where he controls the monthly obligation instead of inheriting one. The question he says it raised was “how could we stop the bleeder?” The answer he pursued was creative acquisition — seller financing, subject-to, and takeover structures — and today most of what his company buys is seller-financed or on creative terms.

The logic is straightforward. When the payment is a term you negotiated, you set it against rent you have verified, with the amortization and balloon structured to match your hold period. When you inherit a payment — as he did with the second mortgage on his childhood home — the obligation is fixed and the rent has to clear a number somebody else chose. These structures carry real legal, lender, and disclosure considerations that vary by state and by note. Run any of them past your attorney and title company before you sign; do not copy a structure off a podcast.

The second shift is operational. Asked what single problem he would fix if he could, Themistocleous named property managers — a few who “could be better at what they do.” That is the gap most portfolios hit after the acquisition machine starts working. The person who tells you a tenant is going hostile, who re-keys after move-out, who walks the unit before you do — that is your property manager, and the quality of that person determines whether you find out about a problem in week one or at the closing table.

Frequently asked questions

Can I sell a rental with tenants still living in it, or should I get them out first?

You can sell occupied, and if the property is cash-flow negative you often have to — carrying an empty house while you wait for a clean sale adds to the bleed. The tradeoff is that an occupied sale exposes you to damage between contract and closing, particularly when the tenant is long-term, below market, and has nowhere comparable to go.

If you do sell occupied, assume the tenant knows the sale ends their situation and manage the final two weeks like a risk window: control access, inspect yourself before the buyer’s walkthrough, and hold a remediation reserve out of your expected proceeds.

How do I protect myself against tenant damage between contract and closing?

Three things do most of the work: know exactly who holds keys and re-key immediately if the unit is vacated, inspect the property yourself 24 to 48 hours before closing instead of relying on the buyer’s final walkthrough, and have a water-damage restoration contractor you already have a relationship with on speed dial.

Themistocleous’s deal survived on exactly those last two. He found concrete in the toilet and a flooded first floor himself, the night before closing, and his existing relationship with a local ServPro owner got the earlier basement flood remediated cheaply and fast.

What happens if the pre-leases I underwrote a DSCR loan on never convert?

You cover the shortfall out of pocket until you re-lease, and the deposits only buy you a short runway. Themistocleous closed a DSCR deal where the occupancy came from pre-leases that vanished right after closing; deposits covered roughly one month and it took five to six months to even out, because it was a larger unit in a thin rural market with few qualified tenants.

The protection is to underwrite the units as vacant and treat signed pre-leases as upside, with reserves sized to how long a re-lease actually takes in that specific submarket.

Should I keep an inherited rental that doesn’t cover its mortgage?

Run the full debt picture first, including any liens you did not know about. Themistocleous inherited his childhood home and found a second mortgage his mother had taken against it — total debt service of $4,600 a month before taxes and insurance, against just under $3,000 in rent.

A gap that size is not fixable with a rent increase or better management, especially on an old house with years of deferred maintenance behind it. If the shortfall is structural and there is no equity to refinance into, selling is usually the right answer, and the sooner you accept that the less you pay to learn it.

What should I check the night before closing on an occupied property?

Water, access, and mechanicals. Run every toilet and fixture, check the basement and lowest floor for standing water, confirm the locks have not been tampered with, and verify the heat and water main are in the state you expect them to be.

Burst pipes with the heat running caused the first-floor flood in Themistocleous’s case, and it was discovered only because he went out and looked. Do this walk yourself, with photos and timestamps, before the buyer’s agent schedules the final walkthrough.

The bottom line

If you have an occupied rental under contract right now, put one item on your calendar: a personal inspection of the property 24 to 48 hours before closing, with a restoration contractor’s number already in your phone. That single habit is the difference between a repair you manage quietly and a buyer walking away hours before signing.