Standard scope, plus the additions the finish makes necessary
A renovated or flipped house gets the ordinary home inspection — same standard of practice, same scope, same report. It also gets two specific additions that this occasion, and few others, genuinely requires: a sewer scope wherever drain lines were disturbed, and an evaluation by a licensed electrician or plumber wherever the permit record shows work was done without a permit.
The reason is counterintuitive. A flipped house is among the hardest properties to inspect precisely because the finish is new. An inspection is a visual examination that reads symptoms: a stain on a ceiling, a sag in a floor, a corroded fitting, scorch marks at a receptacle. A renovation removes the symptoms without necessarily removing the causes.
None of that makes a flip a bad purchase. It makes it one where the inspection must be scoped deliberately rather than ordered as a default, and where a clean report means less than on a house nobody has touched in thirty years.
Why new finishes reduce what an inspector can observe
Every standard of practice in this field says the same thing in slightly different words: the inspection is visual, it is not exhaustive, and concealed conditions are outside it.
Arizona's Board of Technical Registration, which licenses that state's inspectors, puts it at 3.1A: inspections are “visual, not technically exhaustive and will not identify concealed conditions or latent defects.” ASHI's standard says inspections under it are not required to identify or report “concealed conditions, latent defects, consequential damages” or cosmetic imperfections. Texas rule 22 TAC §535.227 says the inspector is not required to report on “anything buried, hidden, latent, or concealed.”
On an ordinary resale that is a mild limitation, because most of what matters has had years to announce itself. On a flip it is the central fact. Fresh drywall and paint remove staining, efflorescence and patching — the record of every past leak. New flooring removes the subfloor's history and the evidence of settlement or moisture. New tile conceals whatever was done to the shower pan beneath it, and inspectors are not required to test shower pans for leakage. New attic insulation covers the top plates and junction boxes, and the inspector is not required to “move, touch or disturb insulation.”
None of that is the inspector declining to work. It is the scope of the engagement, written down in advance, and the conclusion is that on a flip the inspection covers a smaller fraction of what you are buying than on any other house.
The permit record is the second report
Because the physical evidence has been covered up, documentary evidence carries more weight here than on any other purchase, and the most useful document is the jurisdiction's permit history for the address — what was applied for, issued, inspected and finaled. A sibling reference covers what a city permit inspection actually covered and what it did not, and that is the right place to read about how municipal inspection works; this page stops at the use you make of the record.
Get it early: permit records are requested from the building department or county, they are not instant, and this is the step buyers run out of time on. And read an absence correctly — a missing permit is a question, not a verdict. It may mean the work was done without one, that none was required in that jurisdiction, or that the record is incomplete. What it reliably tells you is where to point a licensed trade.
Which trades most often get done without permits
Permit requirements vary by jurisdiction, and this research located no institutional source measuring how often renovation work proceeds without one, so treat the following as the pattern inspectors describe, not as a statistic. It clusters in five places.
Electrical. Panel replacements, new circuits for a kitchen island or bathroom, recessed lighting pushed through existing ceilings, receptacles added to a room that lacked them. The most direct safety consequence, and the place the inspector's hands are most tied.
Plumbing. Drain and supply lines moved to relocate a kitchen, laundry or bathroom; a bathroom added where there was not one; a water heater replaced or relocated. Moving a drain is the act that puts the sewer lateral in question.
HVAC. A replaced condenser or furnace, relocated returns, and duct added to serve newly conditioned space such as a finished attic.
Structural. Walls removed to open a kitchen into a living room — the defining move of the modern flip — where the question is whether the wall carried load, and whether what replaced it was engineered.
Converted space. Garage conversions, finished basements and attic bedrooms, which combine all four and add questions about egress, ceiling height, heating and smoke alarms.
These are exactly the items the buyer is paying a premium for: the open kitchen, the extra bathroom and the new panel are why the house is priced where it is.
The additions, named
A sewer scope, where drain lines were disturbed. A camera is run from a cleanout through the building drain and the lateral to the main — the only way to see a line that is underground or under slab. Order it whenever a kitchen or bathroom was moved or added, and on any older house whose lateral is undocumented. The standard inspection will not substitute: under the InterNACHI Residential Standards of Practice, the inspector is not required to inspect wastewater systems, to determine “exact flow rate, volume, pressure, temperature,” or to operate any valve. A collapsed or offset lateral under a slab is among the most expensive things a buyer can inherit, and it is invisible from inside the house.
A licensed electrician, where the panel or branch wiring was worked on without a permit. The same standards keep the inspector out of exactly where a flip's electrical risk lives: the inspector is not required to insert “any tool, probe or device” into the panel, to operate over-current protection devices, to “measure or determine the amperage or voltage,” or to “verify the service ground.” An inspector can tell you a double-tap is visible or that a receptacle reads open ground. Whether the circuits added for the new kitchen are correctly sized, terminated and bonded is an electrician's determination, not an inspector's.
A licensed plumber, where supply or drain work was unpermitted. Relocated supply lines inside walls, a bathroom added over a crawlspace, a water heater moved — work whose quality is concealed by the time you see it. The sewer scope handles what is underground; the plumber handles what is behind the new tile.
And if the roof was replaced, ask for paperwork. The standards do not require the inspector to walk any roof surface, to perform a water test, or to “warrant or certify the roof.” On a newly re-roofed flip, the permit, the installer's invoice and a transferable manufacturer warranty tell you more than an observation from a ladder.
Resist ordering every available ancillary, though. Each follows from something specific the renovation did; three trades ordered reflexively because the house is new inside spends the inspection budget without aiming it.
An inspector may not determine code compliance, and here is where that is written
This is the sentence buyers of flipped houses most often get wrong, and it is written in rule rather than left to discretion.
Texas rule 22 TAC §§535.227–535.233 provides that the inspector is not required to “determine code compliance, utility sources, or regulatory requirements except as specifically required” by the standards, and TREC's own guidance states that it “does not require inspectors to inspect to any of the various building codes.” The Arizona board's standard, at 3.2A, lists “compliance or non-compliance with applicable codes or regulatory requirements” among the things an inspector need not report. InterNACHI excludes determining “compliance with codes or regulations,” “the cause of any condition,” and “the adequacy of any system or component.” ASHI excludes determining “compliance of systems and components with past and present requirements.”
Four bodies, two of them state regulators, drawing the same line. Your inspector can report that a handrail is missing or that a water heater has no pan, but cannot tell you whether the renovation met the code in force when it was performed, and is not being negligent in declining to. That determination belongs to the building department that issued — or did not issue — the permit.
Nor can an inspector tell you whether the work was sound in the engineering sense. The standards exclude providing “any engineering or architectural service,” determining foundation adequacy, or calculating “the strength, adequacy, or efficiency of any system.” Where a wall was removed to open a kitchen and no permit exists, what carries the load above is a structural engineer's question — a real cost, and one the flip created.
The common mistake: reading a clean report as a clean renovation
A flip frequently produces a short report, and buyers read that as reassurance. It is better read as a measurement of how much was observable. Everything is new, so nothing has failed yet; nothing has failed, so there are no symptoms; and an inspection working to a standard that excludes concealed conditions has less to report. A short report on a flip and one on a well-maintained forty-year-old house are not the same evidence.
That is why this page recommends spending on additions rather than on reassurance. The defects most likely to surface in a flip are the sewer lateral, the electrical service, the structural alteration and the concealed water path — the four most expensive categories in residential repair, and they surface after closing, once the option period or due-diligence window has expired and the remedy that would have let you renegotiate or walk is gone.
And a seller who will not produce permits, invoices or a contractor's name is telling you something. Missing documentation on a house whose whole value proposition is recent work is itself a finding you should price.
What to do, and in what order
Request the permit record first, on the day you go under contract: it has the longest lead time and it determines what else you need to order. Book the standard inspection early in the window rather than at the end, because on a flip you are more likely than usual to need a second appointment with a specialist. Order the sewer scope at the same time, not after — if a kitchen or bath was moved you already know you need it, and sequencing it as a follow-up wastes days you will need for the follow-ups that actually depend on findings.
Match the permit record against the work you can see, and where they do not line up, send the right licensed trade: an electrician for the panel and branch circuits, a plumber for relocated supply and drain work, a structural engineer for a removed wall. Do not ask the inspector to resolve it — the rules above are why they cannot.
Budget the calendar, not just the fee. The constraint is almost never money; it is the number of days you negotiated before the window closes. Read how to read the report before it arrives, and see the buyer's inspection page for the baseline this one adds to.
Frequently Asked Questions
Is inspecting a flipped house different from a normal home inspection?
The inspection itself is the same standard product. What differs is that it should be paired with specific additions — a sewer scope where drain lines were moved, and a licensed electrician or plumber where the permit record shows work was done without a permit — because new finishes conceal the work that a visual inspection would otherwise read from symptoms.
Can a home inspector tell if work was done without a permit?
Not reliably, and it is not their determination to make. An inspector may notice workmanship inconsistent with permitted work and will often say so, but whether a permit was issued is answered by the jurisdiction's permit record for the address, which you request from the building department or county. Request it the day you go under contract.
Will the inspector tell me if the renovation meets code?
No. Texas rule 22 TAC §535.227 provides that an inspector is not required to determine code compliance except as the standards specifically require, and TREC's guidance states it does not require inspectors to inspect to any building code. The Arizona board's standard and the ASHI and InterNACHI standards exclude code-compliance determinations in the same terms. Code compliance is the building department's determination, recorded in the permit file.
Do I need a sewer scope on a renovated house?
Yes, if a kitchen, bathroom or laundry was moved or added, or if a bathroom appears where there was not one — those are the renovations that disturb drain lines. A standard inspection does not substitute: the InterNACHI standard does not require the inspector to inspect wastewater systems or to determine flow, volume or pressure. A compromised lateral under a slab is one of the most expensive defects a buyer can inherit and it is invisible from inside the house.
What should I do if the permit record shows unpermitted work?
Treat it as a question to be answered by the trade that does that work, not by the inspector. Have a licensed electrician evaluate unpermitted panel or circuit work, a licensed plumber evaluate relocated supply or drain lines, and a structural engineer evaluate a wall that was removed. Then find out from the jurisdiction what it would take to permit the work retroactively, because that cost usually lands on the owner at the next sale — which may be you.
Is a flipped house a bad buy?
No, and treating it that way is as unhelpful as the opposite assumption. A renovation done by a competent operator who pulled permits and kept invoices is a good thing to buy, and the documentation makes it verifiable. The problem is not flipping, it is that the finish quality a buyer responds to carries no information about the work behind it, so the purchase has to be evaluated on documents and specialists rather than on how the kitchen looks.