Buying an Older Home in Houston: What to Look For in the Inspection Report — A Real Estate Broker’s Option-Period Game Plan

A 1965 house inspected to 2026 standards will come back with pages of findings. When you’re buying an older home in Houston, the job during the option period is to find the five or six that matter: foundation movement, the original drain and supply lines, the electrical panel and wiring, the roof’s age for insurance purposes, and any sign of water where it shouldn’t be. The option period exists so you can get the two or three specialist opinions a general home inspector isn’t required to give, and usually won’t. Here is how I read the report with my buyers, item by item, and how we decide what is normal for the age, what to negotiate, and what would make us walk.

Rules and forms as of October 2026: inspector scope from the TREC Standards of Practice (22 TAC §§535.227–535.233) and the Property Inspection Report form REI 7-6 (8/9/21); contract references to TREC form 20-19 (effective July 1, 2026). This post is refreshed when TREC revises either one.

This post picks up after you’re under contract: the option period is running and a report is in hand or on the way. For how the option period starts, how the days are counted, and what the fee buys, read the Texas option period explained; everything below starts inside that window.

First, what a Texas home inspection is (and isn’t)

Texas home inspectors are licensed by the Texas Real Estate Commission and work to a published rulebook, the Standards of Practice. The rules describe the inspection as “a limited visual survey and basic performance evaluation of the systems and components of a building,” and say plainly that it “is not intended to be a comprehensive investigation or exploratory probe.” Your inspector looks at what is accessible, from near proximity, and operates what is meant to be operated. The TREC consumer page on property inspections is a good five-minute read before you open the report.

The rules are just as clear about what an inspector does not have to do. Under the Standards (§535.227) the inspector is not required to inspect anything “buried, hidden, latent, or concealed,” to move furniture or stored items, to use “cameras or other tools used to inspect the interior of a drain or sewer line,” to determine the presence of asbestos, lead-based paint, or mold, to judge “compliance with any code,” or to estimate “life expectancy or age.” The walls stay closed throughout. A hydrostatic test of the drain lines can only be run by a licensed plumber, and the contract requires the seller’s separate written permission for it. In other words, the general inspection tells you where to look harder. It does not finish the job on an older house, and it was never meant to.

The report itself follows a required form, REI 7-6, with four boxes on every line: I (Inspected), NI (Not Inspected), NP (Not Present), and D (Deficient). Those boxes decide how a first-time buyer reads a 40-page report. First, “Deficient” is a flag, not a verdict. The rules define a deficiency as a condition that, in the inspector’s judgment, “adversely and materially affects the performance of a system, or component” or “constitutes a hazard to life, limb, or property.” A dripping hose bib and a cracked heat exchanger both get the same D. Second, “Not Inspected” does not mean fine. The form says it in capital letters: “ONLY those items specifically noted as being inspected on the report were inspected,” and it puts the next step on you, the client, to “obtain further evaluations and/or cost estimates” from qualified professionals on anything marked Deficient. The form also acknowledges that older homes may have conditions that “did not violate building codes or common practices in effect” when they were built and “may not be required to be updated to meet current code requirements.” That sentence is the right frame for a 1965 house.

What to look for when buying an older home in Houston: the short list

Most of the 1950s–1980s houses my first-time buyers can afford sit in a handful of places: close-in neighborhoods such as Oak Forest, Garden Oaks, Meyerland, Westbury, and Sharpstown; along the Spring Branch and early Memorial corridors; and in the 1970s–80s suburbs such as Copperfield, Bear Creek, Clear Lake, Kingwood, and Alief. The houses differ, but the report lines repeat. When I’m helping a client on a 1960s or 1970s house, this is the list I work from, with the report language you’ll see, why it matters in Houston specifically, where it usually lands, and who gives the second opinion.

Item	What the report line usually says	Why it’s a Houston issue	Where it usually lands	Who to call
Foundation movement	“Evidence of differential movement”: diagonal cracks at corners of openings, doors out of square, brick-veneer stair-step cracks, slope noted	Expansive clay swells wet and shrinks dry; slabs from this era move with it	Normal to see some; negotiate when active; walk when an engineer finds it unresolved and the cure exceeds your budget	Licensed structural engineer
Under-slab drain lines	“Cast iron drain piping observed,” “slow drain,” “recommend sewer camera / hydrostatic test”	Original cast iron under the slab, and an Orangeburg yard line on some older houses, are near or past their service life, and slab movement stresses joints	Negotiate on a failed scope; walk if the lines have failed and you can’t fund a reroute	Licensed plumber with a camera; hydrostatic test needs the seller’s written OK
Supply lines	“Galvanized steel supply piping,” “polybutylene supply lines observed,” low flow at fixtures	Galvanized corrodes shut from the inside; polybutylene (late 1970s–mid 1990s) is a known failure material some insurers ask about	Budget item on galvanized; negotiate on polybutylene	Licensed plumber for a repipe bid
Electrical panel and wiring	“Aluminum branch circuit conductors,” “Federal Pacific” or “Zinsco” panel, double-tapped breakers, missing GFCI	1960s–70s aluminum branch wiring and these two panel brands are the life-safety items on an older Houston house	Always on the list; negotiate the repair or the credit	Licensed electrician
Roof age and condition	“Covering at or near end of service life,” hail bruising, lifted shingles, flashing deficiencies	Texas carriers quote on roof age and may limit coverage on an older roof	Negotiate; the insurance quote tells you how hard	Roofer for a bid; your insurance carrier for quotes
Drainage and grading	“Negative grade at foundation,” downspouts discharging at the slab, staining at the slab line	Water at the slab is the foundation problem in slow motion, and Houston gets a lot of water	Normal to fix; walk only with evidence of repeated water intrusion the seller didn’t disclose	Drainage contractor; the seller’s disclosure and FEMA map
HVAC and ductwork	System age, “R-22 refrigerant,” attic ducts with damaged insulation, furnace past 20 years	Nine months of cooling a year; R-22 is no longer produced or imported	Budget item when it runs; negotiate when it doesn’t or is unsafe	Licensed HVAC contractor (heat-exchanger check on an old furnace)
Water heater	Age, “no drain pan,” “temperature-and-pressure-relief (TPR) discharge line improper or missing”	Attic and closet installs are common here; a tank that fails without a pan ends up in the ceiling below	Normal; negotiate the safety items	Licensed plumber
Windows and paint	“Original single-pane windows,” failed seals, deteriorated paint on a pre-1978 house	Energy cost and comfort; lead paint comes to you as a federal disclosure with the contract, and the TREC inspection does not test for it	Normal for the age; budget	Window contractor; EPA-certified lead inspector if you want testing
Wood-destroying insects	A separate wood-destroying insect (WDI) report: active termites, prior treatment, conducive conditions	Subterranean termites are a fact of life on the Gulf Coast; lenders may require treatment	Negotiate treatment and any damage repair	Licensed pest-control company

The rows above describe patterns. Where a figure matters, the only number worth relying on is a bid you get during the option period.

Foundation movement on Houston clay

If you’re buying an older home in Houston, you’re buying a house that sits on clay. Most of the houses built here between 1950 and 1985 are slab-on-grade, poured over clay that swells when it is wet and shrinks when it is dry; the 1940s and 1950s pier-and-beam houses in Oak Forest, Garden Oaks, and parts of Spring Branch move on the same clay, through the piers and sills instead of a slab. A report line about differential movement, with hairline cracks at the corners of windows and a door that catches, is close to the expected condition for the age. What the inspector cannot tell you, and the rules don’t ask them to, is whether the movement is historic and stable or active and ongoing. That is a structural engineer’s call, and only an engineer’s.

Most foundation arguments come down to a prior repair and an engineer’s letter. Has the house been piered before, and is there a transferable warranty and a repair map? The seller’s disclosure asks about previous structural repair, and a prior repair with paperwork usually settles the question rather than raising it. And what does a licensed structural engineer say after a level survey of the slab? In my experience an engineer’s written letter ends more foundation disputes than any second opinion from a repair company, because the engineer is not bidding the repair. A foundation company’s no-cost evaluation is a sales call, however friendly. The letter is also what a lender or an appraiser wants to see if the question comes up later. More on how foundation findings derail Houston sales, and how to keep yours together, in a post coming soon.

On a pier-and-beam house the inspector goes under the floor as far as access allows and reports on what the crawlspace shows: rotted sills and joists, standing moisture, deteriorated piers or shims, and whether the crawlspace can be entered at all. A crawlspace the inspector could not get into is an NI box, and on an older house it is one worth paying a foundation contractor or engineer to open up.

Under-slab drain lines: cast iron and Orangeburg

Houses built here before the mid-1970s usually drain through cast iron pipe under the slab, and on some older houses the yard line out to the street is Orangeburg, a tar-impregnated fiber pipe. Both materials are at or past the end of their service lives, and slab movement on clay works on every joint. The inspector will note the material where it is visible and may note slow drains, but the rules specifically exclude sewer cameras, and a hydrostatic test is a licensed plumber’s job rather than the inspector’s. This is the single most expensive surprise in an older Houston house, and the general inspection cannot see it.

Buyers mix up the two tests. A sewer scope is a camera run through the cleanout to look at the inside of the drain line: cracks, offsets, channel rot along the bottom of cast iron, root intrusion. You can order it on your own. A hydrostatic test plugs the main drain and fills the system with water to see whether it holds; it is the test that confirms a leak under the slab. Under Paragraph 7A of the contract, “any hydrostatic testing must be separately authorized by Seller in writing,” which is why TREC publishes a separate Addendum for Authorizing Hydrostatic Testing (form 48-1). That addendum exists because the test can damage an already-failing line, and the form makes the parties choose who carries that risk. I ask for the scope first; if the camera shows trouble, we ask for the addendum and the hydrostatic test, and we bring a licensed plumber’s bid to the negotiation. The full story of under-slab cast iron in Houston gets its own post next in this series.

Supply lines: galvanized steel and polybutylene

The water coming in matters as much as the water going out. Galvanized steel supply pipe, standard through the 1960s, corrodes from the inside until pressure drops and water runs rusty after a vacation. It is a budget item, and a repipe bid is easy to get. Polybutylene, the grey plastic used from the late 1970s into the mid-1990s, is the one to take seriously: it is a documented failure material, and some insurers ask about it on the application. The report will usually name the material at the water heater or under a sink. If it says polybutylene, the repipe goes into the negotiation.

Electrical: aluminum branch wiring, Federal Pacific and Zinsco panels, GFCI and egress

This is the section where my own rule for sorting a report is simplest. When I prepare a deficiency list for a seller, I leave off pure code-update items, the things that were legal when the house was built and have simply been superseded. Life-safety items never come off that list, whatever their age. Four findings on an older Houston house are always life-safety; three are electrical and the fourth is the bedroom window.

• Aluminum branch wiring. Many houses built in the mid-1960s through the early 1970s were wired with aluminum at the outlets and switches. The Consumer Product Safety Commission’s publication on repairing aluminum wiring reports that homes built before 1972 and wired with aluminum are 55 times more likely to have outlet connections reach fire-hazard conditions than copper-wired homes. The TREC rules require the inspector to report the absence of approved copper/aluminum connection devices when aluminum branch conductors are found in the panel. The permanent repairs are a copper rewire or an approved pigtail connector at every connection, installed by an electrician.
• Federal Pacific Electric and Zinsco panels. Both brands were common in Houston through the 1970s and both have widely reported histories of breakers that fail to trip. An inspector will usually name the brand and recommend evaluation. I ask for a panel replacement bid every time; it is a defined job with a defined bid, and an easy thing to put in front of a seller.
• GFCI protection. A ground-fault circuit interrupter trips in milliseconds when current leaks to ground; it is what prevents electrocution when a powered appliance meets water. The rules require the inspector to report its absence at bathroom, kitchen countertop, garage, and outdoor receptacles, among others. A 1972 house was not built with them. It stays on my list anyway, because the hazard it prevents is the same in a 1972 house as in a new one.
• Bedroom egress. The rules require reporting “the absence of performing emergency escape and rescue openings in all sleeping rooms,” which in an older house usually means a painted-shut window or one with a sill too high to climb out of in a fire. It started as a code update, and it stays on the list because what it protects is the way out of a bedroom in a fire.

Roof age and the insurance conversation

On an older house the roof is an insurance question before it is a repair question. The inspector will describe the covering’s condition and may note hail bruising, lifted shingles, or flashing deficiencies, but the rules specifically exclude the remaining life of the roof covering from the inspection. Your insurance carrier, on the other hand, cares about the roof more than almost anything else on the report. In my experience Texas carriers quote on roof age and condition, and on an older or storm-marked roof they may decline to bind coverage until it is repaired, require a higher separate wind-and-hail deductible, exclude cosmetic damage, or write the roof on an actual-cash-value basis instead of replacement cost. Any one of those changes the cost of owning the house, and your lender will require a bound policy before closing.

So the advice I give every buyer with a short option period is the same: call for insurance quotes Monday morning, well ahead of the week of closing. Send the inspector’s roof photos to the carrier and ask for a written quote on this specific house. If the quote comes back conditioned on a new roof, that is a negotiating item with a number attached. For the broader picture of what a Houston policy covers and why flood is a separate policy, read why you need homeowners insurance in Houston. And if a storm hits between contract and closing, the rules change; I covered that in what happens when a hurricane hits before closing.

Water: drainage, grading, and prior-flood tells

Water is the quiet item on the list. The report lines are undramatic, “negative grade at the foundation,” “downspout discharges at slab,” “staining observed at base of wall,” and most are inexpensive to correct. Correct them anyway, because water held against a clay slab is how the foundation section above gets written. The tells of past water inside the house are different: a water line on the garage wall or the water heater, newer drywall stopping at a uniform height, replaced baseboards in one room, a musty smell in a closet on an exterior wall, and freshly painted lower walls in an otherwise dated house.

Read those tells against two documents. The seller’s disclosure asks directly about previous water penetration from a flood event, flood-insurance claims, and federal flood assistance, and it asks the seller to place the property relative to the 100-year and 500-year floodplains, the floodway, and any reservoir flood pool; I mapped those questions out in Houston’s flood disclosure questions. Then check the address yourself on the FEMA Flood Map Service Center. A house that shows water tells and a disclosure that says none is a conversation to have before the option period ends, calmly and in writing. If the answers don’t line up, that is a reason to walk.

The quieter age items

None of these will decide the purchase on their own when you’re buying an older home in Houston, and all of them belong in your budget.

• Original single-pane windows. Expected on a pre-1980 house. They cost you in comfort and in cooling bills, and replacing them is a project for your own budget after closing.
• Pre-1978 lead-based paint. The lead-paint item reaches you as a federal disclosure, and the inspector does not test for it. Paragraph 7C of the contract says the seller’s disclosure of lead-based paint and hazards “is required by Federal law for a residential dwelling constructed prior to 1978,” and the EPA’s disclosure rule gives you the pamphlet, any known records, and a 10-day window to arrange your own lead inspection or risk assessment if you want one.
• HVAC, ducts, and R-22. A system older than about 15 years that still runs on R-22 is living on borrowed refrigerant; production and import of R-22 ended in 2020, and a major repair on an R-22 system often becomes a replacement. Attic ducts with crushed or missing insulation are a comfort and efficiency item. A furnace past 20 years should have its heat exchanger evaluated before you rely on it, since a cracked exchanger is a carbon monoxide risk.
• Water heater. The report will give the age and flag a missing drain pan or an improper temperature-and-pressure-relief discharge line. The age is budget; the pan and the TPR line are safety items I ask for.
• Unpermitted additions and garage conversions. Houston has no zoning, and a converted garage or a bolted-on sunroom is common in Alief, Sharpstown, and Spring Branch. The inspector reports what it looks like and may note it; whether it was permitted is a records question. Section 9 of the seller’s disclosure asks about additions or alterations made without permits, and a quick comparison of the appraisal district’s sketch against what you walked through tells you whether the square footage was ever recorded.
• Asbestos. In a house of this age it hides in 9-by-9 floor tile, popcorn ceilings, and old duct wrap. The inspector does not test for it, and Paragraph 7G of the contract leaves environmental matters to a separate addendum if you want one. Left undisturbed it is a non-issue; test before any remodel that would cut into it.
• A residential service contract. When the HVAC and the water heater are old but running, a seller-paid home warranty for the first year is an inexpensive ask. Paragraph 7H of the contract has a line for it, and a seller who won’t budge on price will often agree to this.
• The WDI report. The termite report is a separate document from a separate license, and buyers forget to read it. Active infestation, prior treatment, and conducive conditions such as wood-to-soil contact all show up there. If you are financing, your lender may require the treatment before closing, and under Paragraph 7E of the contract neither party is obligated to pay for lender-required treatment unless you agree in writing, so it belongs in the negotiation.

Normal, negotiate, or walk: how I sort the report

A 1965 house will have deficiencies, and anyone buying an older home in Houston should expect that going in. The length of the list is not the verdict; what matters is which tier each item falls into. I sort every report into three.

1. Tier 1, safety and active hazards. Panel hazards, aluminum-wiring connections, gas leaks, missing GFCI, blocked egress, a furnace with a suspect heat exchanger, an active leak. These are asked for every time, as a repair by a licensed trade or as a credit sized by a bid.
2. Tier 2, negotiating items. Engineer-confirmed active foundation movement with a repair bid, a roof the insurer won’t write as-is, a failed sewer scope, polybutylene, a non-functioning HVAC system, water-penetration repairs, termite treatment. These are the items where bids decide the ask.
3. Tier 3, note it and budget for it. Historic, stable foundation movement covered by an engineer’s letter, original windows, a working-but-old water heater, cosmetic items, and pure code-update items that carry no safety consequence. These belong in your ownership budget.

On an older house I usually prefer a price reduction or a seller credit over seller-performed repairs. The seller has every incentive to fix things as cheaply as possible, and you cannot supervise work on a house you don’t own yet. A credit lets you choose the contractor and the scope after closing. The paperwork for any of this is an Amendment to the contract, and the 2026 form changes that affect what a seller can contribute are covered in what Houston buyers should know about the 2026 Texas contract changes. When an agreed repair cannot finish before closing, the title company can hold money back; see how an escrow holdback works in a Texas sale.

One more distinction, because buyers ask: the appraiser is not your inspector. The appraisal is the lender’s valuation; the appraiser confirms the house is sound enough to secure the loan and leaves the outlets, the drains, and the panel to your inspector. I explained the difference in what appraisers look for, and sellers can see the other side in my home appraisal checklist. A clean appraisal tells you nothing about the drain lines.

The option-period game plan, day by day

Buying an older home in Houston on a short option period is a scheduling problem more than anything else. This is the order I run it in.

1. Day 0: book the inspector the day the contract is executed, so the inspection happens in the first two days of the window, and ask for the WDI report with it. Under Paragraph 7A the seller must keep the utilities on, so there is no reason to wait.
2. The day the report lands: read it the same day. Go straight to the D boxes, then to every NI box, and ask why each one was not inspected.
3. The next morning: book the specialists. A structural engineer if there is any foundation note, a plumber with a camera for any pre-1975 house, an electrician for aluminum wiring or a named panel brand, a roofer if the roof is older or storm-marked. Ask for written bids.
4. Early in the week: call insurance carriers. Quotes on this house, with the roof photos attached.
5. Same week: read the seller’s disclosure against the report. Every D item that the disclosure should have mentioned, and didn’t, is a question for the listing side. The form explains what the seller is required to tell you in the Texas seller’s disclosure explained, and if the notice arrived late or never, you may have a separate right to terminate.
6. Two days before the deadline: bring the bids to the negotiation. The ask goes to the listing side with the deficiency list and a response date that leaves you time to walk if the answer is no.
7. Before 5:00 p.m. on the last day: decide. Paragraph 5B is strict about the time; the option period post above explains why.

How I work the inspection with my buyers

Reading the report is the part of the option period where a real estate agent earns the fee you agreed to in your written buyer representation agreement, so here is what that work looks like when you hire me. The day the report arrives I write a plain-English summary of the major items by category, with the inspector’s page references, so you know which of the 40 pages matter and why each item matters in this house. From that summary I build the deficiency list that goes to the real estate listing agent: categorized, page-referenced, with pure code-update items removed and the life-safety items kept. We get the specialist opinions and the insurance quotes in the first days of the window, and the negotiation is anchored to a specific ask, a specific deadline, and the option period’s own clock. If the answer leaves the house outside your budget, we send the termination notice with the signed release of earnest money inside the window, and your deposit comes back.

Any real estate agent you consider when buying an older home in Houston should be able to answer four questions without hesitating: which items on this report are normal for the age, which ones need a specialist and which specialist, what the insurance market is doing with roofs like this one, and whether a credit or a repair serves you better here. If the answers are vague, keep interviewing; how to choose a Realtor walks through the rest of that interview, and the Houston home-buying process page shows where the inspection sits in the whole timeline. First-time buyers will find the full sequence in the first-time home buyer’s roadmap for Houston.

Older-home inspection questions, answered

What does a home inspector check in Texas?

A TREC-licensed inspector follows the Standards of Practice, which set minimum requirements for the structure, electrical, heating and cooling, plumbing, appliances, and optional systems such as pools and sprinklers, and reports on the REI 7-6 form. The inspection is a visual, non-invasive survey of accessible systems. It does not include opening walls, moving stored items, sewer cameras, hydrostatic tests, or testing for mold, asbestos, or lead-based paint.

Is a long Deficient list normal on an older house?

Yes. A 1960s or 1970s Houston house inspected to current standards will carry dozens of D marks, many of them conditions that were acceptable when the house was built. The number of items tells you little. Sort them into safety items, negotiating items, and budget items, and judge the house on the first two tiers.

What is the difference between a sewer scope and a hydrostatic test?

A sewer scope is a camera inspection of the drain line from the cleanout; you can order it directly and you should get the video or still shots to forward to the listing side. A hydrostatic test is a pressure test of the drain system that confirms whether it holds water. Only a licensed plumber may perform it, and the Texas contract requires the seller’s separate written authorization, usually on TREC form 48-1, because the test itself can damage a failing line.

Should I get a structural engineer if the inspector notes foundation movement?

Yes, if the note goes beyond hairline cosmetic cracking or the inspector recommends evaluation. A licensed structural engineer is not bidding the repair, so the opinion is independent, and the engineer can say whether movement is historic or active, which the general inspector cannot. Ask for the level-survey readings along with the letter; the letter carries more weight with a seller, a lender, and an appraiser than a repair company’s estimate.

Can the seller refuse repairs?

Yes. Under the Texas contract you accept the property as is, and any repair or credit has to be agreed in a signed amendment. The seller can say no to every request. Your protection is the option period: if the answer leaves the house outside your budget, you can terminate before the deadline and your earnest money is refunded.

Does the seller have to give me a prior inspection report?

The Texas REALTORS® version of the seller’s disclosure asks whether the seller has received written inspection reports in the past four years and tells them to attach copies, while cautioning that an old report does not describe the current condition. If the seller used that form and has one, ask for it, and read it as history rather than as a current inspection.

Is the appraisal an inspection?

No. The appraisal is the lender’s valuation, and the appraiser’s condition check is limited to what the loan program requires, which is why an FHA or VA appraisal can call for a repair that a conventional one would not. Nobody tests the outlets, runs a camera through the drains, or opens the panel during an appraisal. The inspection protects you; the appraisal protects the lender.

Do I need a real estate agent who knows older Houston homes?

You need one who can read the report with you and tell you which items are normal for the age and which need a specialist. Compensation for that work is set out in a written buyer representation agreement before showings begin, and in my own practice it has always been handled within the transaction. Before you sign with anyone, ask how they handle an inspection report on a 1970s house and listen for specifics.

Last updated: October 2026 · Inspector scope quoted from the TREC Standards of Practice (22 TAC §§535.227–535.233) and the Property Inspection Report form REI 7-6 (8/9/21); contract language from TREC form 20-19 (effective July 1, 2026) and form 48-1; aluminum-wiring figures from CPSC Publication 516 (June 2011); lead-paint rule from the EPA, all as of October 2026. Insurance practices described are my own experience with Texas carriers and vary by company. General information, not legal, engineering, or insurance advice; rely on your own licensed inspector, engineer, and contractors for a specific house.

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