A rental property under contract stalls for a strange reason more often than buyers expect: the staircase. Not a foundation crack, not a roof issue, not knob-and-tube wiring. A set of interior stairs that has been climbed safely for thirty years without anyone thinking twice about it, until an inspector's level catches a riser height a few tenths of an inch out of range, or a handrail that doesn't meet the graspability requirement. On paper it looks like a minor fix. On a deal timeline, it can be the difference between closing on schedule and losing a buyer.
A Fairly Typical Example
A duplex conversion in an older neighborhood, originally a single-family home split into two units sometime in the 1980s, is a common setup for exactly this problem. The staircase to the upper unit was likely built to whatever code, if any, was locally enforced decades ago, and it has probably never been touched since. It looks completely normal to a buyer walking through. It reads very differently on an inspection report once someone puts a level on it.
This kind of property isn't rare. Multi-unit conversions from single-family stock are common in a lot of older urban and suburban markets, and the staircases in them are disproportionately likely to predate current code by a meaningful margin. Knowing this going into a deal, rather than discovering it at inspection, changes how an investor prices the acquisition from the start.
Why Stairs Show Up So Often on Inspection Reports
Older rental properties, especially multi-unit buildings converted from single-family homes, tend to have staircases built to whatever code existed decades ago, if any code was meaningfully enforced in that jurisdiction at the time the conversion happened. A basement or attic conversion adding a unit almost always adds a staircase, and that staircase gets scrutinized under current code even if the rest of the structure is grandfathered.
Inspectors flag stairs disproportionately for a simple reason: riser height, tread depth, and headroom are objectively measurable, unlike more subjective condition items. A home inspector with a tape measure and a level can document a stair code violation in under two minutes, and buyers' lenders increasingly require those items resolved before closing on financed deals.
The Direct Repair Cost Is Usually Small
Fixing a single non-compliant flight, rebuilding stringers to correct riser height, adjusting a handrail, adding a missing guardrail, typically runs a few thousand dollars for a standard residential staircase. That's a manageable line item against most acquisition budgets. The real cost isn't the repair itself; it's what happens to the deal timeline while it gets sorted out.
Multi-unit properties can compound this quickly if more than one staircase is affected. A triplex or fourplex conversion often has two or three interior stairways built at different points as the property was subdivided over the years, and it's common for only some of them to have been updated to current code along the way. An inspector who flags one non-compliant flight will usually check the others too, which turns a single-item repair estimate into a multi-flight project scope.
The Indirect Cost Is Almost Always Bigger
A failed inspection item that requires a permit and a re-inspection adds weeks to a closing, and financed buyers on a rate lock have a real dollar cost attached to every week of delay. Sellers who negotiated a credit instead of doing the repair themselves often underestimate what the buyer's contractor will actually charge, especially if the fix requires a permit pull and inspection scheduling in a jurisdiction with a backlog.
For an investor evaluating a deal, this is exactly the kind of soft cost that belongs in a return calculation before an offer goes in, not after an inspection report comes back with a surprise. Running a rough repair estimate, plus a delay buffer, against your expected returns changes the math on a marginal deal more than people expect going in.
A two-week delay on a rate-locked purchase loan can cost real money in extension fees or a re-lock at a worse rate, on top of whatever the contractor charges for the staircase itself. Add in the soft cost of a nervous buyer or seller reconsidering the deal during an extended timeline, and a small code item starts to justify a line item in underwriting rather than a footnote. Lock extension fees vary by lender but are rarely trivial, and a re-lock at a materially higher rate on a large loan amount can dwarf the cost of the staircase repair that caused the delay in the first place.
How This Plays Out Differently on a Cash Deal Versus a Financed One
The consequences of a failed stair inspection depend heavily on how the deal is being funded. A cash buyer with no lender in the loop can decide to close on schedule and handle the repair afterward on their own timeline, treating it as a straightforward line item in the rehab budget. A financed buyer often doesn't have that flexibility, because many lenders require code violations identified in an inspection to be resolved, or credited in a way the lender specifically approves, before funding.
This matters for sellers too. An investor selling a property with a known stair issue to a buyer pool that's mostly financed should expect the repair conversation to come up almost every time, rather than treating it as a one-off surprise. Pricing the fix into the listing, or completing it before marketing the property, often moves faster than negotiating it deal by deal with each new financed buyer.
Running the Numbers Before You Bid
The Investment Property Analyzer lets you model cap rate, cash-on-cash return, and total return scenarios with a repair budget line built in, so a known issue like a non-compliant staircase can be priced into your offer instead of discovered as a surprise credit negotiation after inspection. EvvyTools hosts that calculator alongside a broader set of free real estate math tools worth bookmarking for the next deal.
If you're the one scoping the repair rather than negotiating around it, there's a detailed guide to the actual rise, run, and headroom numbers inspectors check on a staircase, which is useful for estimating repair scope before you get a contractor's quote.
Where to Check the Numbers That Matter
The National Association of Realtors publishes practical guidance on inspection contingencies and repair negotiations that's aimed at exactly this kind of situation. HUD maintains background on minimum property standards for FHA-financed deals, which are often stricter than a conventional loan's requirements and worth checking if your buyer pool includes FHA borrowers. For general background on how investors evaluate acquisition risk, the Wikipedia article on real estate investing is a reasonable starting reference.
The Takeaway for Underwriting
Stair code compliance is easy to overlook in underwriting because it rarely shows up as a line item anyone budgets for separately; it gets lumped into a vague "repairs and updates" bucket if it's considered at all. Treating it as its own checked item, particularly on older multi-unit conversions, closes a gap that otherwise tends to surface at the worst possible point in a deal timeline: after the buyer's inspector has already found it and the clock on the closing date is already running.
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