What does a Texas home inspection not cover?

A Texas home inspection is a limited visual survey and a basic performance check, defined by TREC's Standards of Practice. The inspector does not run a hydrostatic test on the drain lines (only a licensed plumber may), does not camera the sewer line, does not issue the termite report (that takes a Texas Department of Agriculture license), does not measure the foundation with a level, is not required to identify latent hail damage on the roof, and is not required to inspect pools, sprinklers, septic systems, wells, or outbuildings at all unless you ask and the inspector agrees. In Flower Mound, where clay soil, slab foundations, hail, pools, and west-side septic lots are common, that is exactly the list that matters, and fitting the right specialists inside a 7 to 10 day option period is the whole game.

The option period started Saturday, the inspector came Tuesday, and the 40-page report lands that night with a lot of photos and a lot of "recommend further evaluation by a licensed professional."

Here's the part nobody explains until you're standing in it: the general inspection is the beginning of your due diligence, not the end of it. It tells you where to look. It does not look there for you.

What a TREC inspection is, and where it stops

Every licensed Texas inspector works to the same rulebook: TREC's Standards of Practice, sections 535.227 through 535.233 of Title 22 of the Texas Administrative Code.

Under 535.227, an inspection is "a limited visual survey and basic performance evaluation" of the home's systems. It is "not intended to be a comprehensive investigation" into the cause of anything, and the inspector is not required to use specialized equipment or do anything destructive.

That one paragraph explains most of the "recommend further evaluation" lines in your report. The inspector is doing the job as the state defines it, and the state defines it narrowly on purpose. The same section lists what the inspector is not required to do. The parts that matter on a resale home here:

• Anything inaccessible. If it takes moving furniture, taking something apart, or risking damage to see it, it is not inspected. Attics with small openings and crawl spaces under 18 inches of headroom are out.
• Remaining life or age of anything. The report will say the water heater works today. It will not say it has two years left.
• Code compliance. The inspector is not checking the house against the Town of Flower Mound's building code.
• Environmental hazards. Asbestos, lead paint, mold, and "any other environmental hazard" are specifically excluded.
• Engineering. The rule says the inspector is not required to provide engineering or other specialist services, and most will say so in the report.
• Cosmetic conditions.

Then there is a whole second section, 535.233, titled "Optional Systems." Its first line is the one every buyer should read: "An inspector is not required to inspect the components or systems described under this section." Those systems are landscape irrigation (sprinklers), swimming pools and spas, outbuildings, private water wells, private sewage disposal (septic), and built-in appliances not already covered. If you want them inspected, you ask, you usually pay an add-on, and the inspector has to agree to take them on.

So on a Flower Mound home with a pool, a sprinkler system, and a workshop out back, the standard inspection can legally skip all three.

The specialists that matter on a Flower Mound home

The hydrostatic test (licensed plumber only)

This is the one that catches the expensive problem. A plumber plugs the drain system at the cleanout, fills it with water to slab level, and watches the level for 15 to 30 minutes. If it holds, the drain lines under your slab are sound. If it drops, there is a break somewhere under the house.

Your inspector cannot do this. TREC's own guidance is one sentence: "only a licensed plumber may perform a hydrostatic test on a system within a home."

It also needs the seller's written permission under Paragraph 7A of the TREC contract, and the state publishes a form for it: the Addendum for Authorizing Hydrostatic Testing (TREC No. 48-1). It records that you are paying for the test and lets you and the seller agree on who is responsible if the test itself causes damage. Get it signed before the plumber is scheduled, not the morning of.

When it matters here: any slab home built before the late 1990s, where the drain lines under the slab may be cast iron. Flower Mound's older east-side subdivisions are full of exactly that era. Our guide to buying an older Flower Mound home covers what a failed test leads to and what a repipe costs.

The sewer scope

Different test, different question. A camera goes through the main sewer line toward the street and finds root intrusion, bellies, offset joints, and collapsed sections in the yard, which a hydrostatic test on the lines under the slab will not show you. The TREC rules do not require it, and the standard inspection stops where the main line leaves the foundation. Some DFW inspectors offer the scope as an add-on at the same visit, which is the cheapest way to get it.

When it matters here: older homes, large established trees near the line, and any disclosure that mentions a past backup. Sewer line replacement in a yard runs into five figures.

The foundation engineer

Your inspector is required to give a written opinion on how the foundation is performing, and to report the visible signs when it isn't: doors that bind, sloping floors, cracks in walls and ceilings. What the inspector is not required to do is tell you why, or measure anything.

A licensed structural engineer does the measuring. An elevation survey maps how far the slab has moved from flat, in inches, across the whole footprint, and the engineer's report tells you whether the movement is historic and stable, active, or something that needs piers. It is the document a foundation company will work from if you negotiate repairs.

When it matters here: this is Flower Mound. The whole town sits on expansive clay, and our post on what Flower Mound's clay soil means for your foundation explains why most homes here show some movement. Any time the inspection report flags foundation performance, any time there is a history of foundation repair on the disclosure (ask for the warranty and the pier map), and on most homes more than 20 years old, I want an engineer's letter in the file before the option period ends.

The termite report (WDI)

Your home inspector will note wood-destroying-insect evidence if they see it. What they cannot do is issue the Texas Official Wood Destroying Insect Report. That report is regulated by the Texas Department of Agriculture's Structural Pest Control Service, and only a licensed certified applicator or technician in the termite category can inspect for it and sign it. A TREC inspector license alone does not qualify.

The WDI inspection covers the visible, accessible areas and comes with a diagram of the house marking active infestation, previous infestation, prior treatment, and the conditions that invite termites, such as wood-to-ground contact, formboards left in place, and slab cracks.

When it matters here: always on a VA loan, where the lender requires it. On everything else, it is inexpensive and North Texas has real termite pressure. If you are selling to a VA buyer, our post on selling to a VA or FHA buyer covers the Texas rule on who pays.

The roofer (because of hail)

The inspector walks the roof when it is safe to. What the rule specifically does not require is identifying "latent hail damage," and it does not require an opinion on remaining life.

In Denton County that is a meaningful gap. A roof that passed inspection can still carry hail bruising that a future adjuster will call pre-existing. A roofing contractor's inspection, with photos, tells you the roof's actual condition and age, which also feeds your insurance quote. Our post on how rising insurance costs affect your Flower Mound budget explains why the roof is now the first thing the insurer asks about.

Many roofers inspect at no charge hoping to get the work. That is fine, as long as you treat the findings as a bid and not as a neutral report.

HVAC, pool, sprinkler, septic, and well

HVAC. The inspector runs the system and reports what it does, not refrigerant pressures, efficiency, or whether the unit is sized to the house. On a system past ten years, a licensed HVAC technician's service call is the only way to know whether you are buying two more summers or ten.

Pool and spa. Optional under 535.233, and even when the inspector takes it on the scope is visual. A pool company's inspection pressure-tests the underground lines for leaks, which is the expensive failure. Our guide to Flower Mound homes with a pool goes through the full list.

Sprinklers. Optional, and cheap to add. A leaking main under the lawn shows up as a water bill, not a visible problem.

Septic and well. Optional, and on a west-side Flower Mound lot they are the systems with the biggest replacement cost. The Town, not Denton County, is the permitting authority inside town limits, and it keeps the records. Our post on buying a Flower Mound home on well and septic covers the inspection, the maintenance contract rule, and the permit file.

New construction. Different list entirely, covered in should you inspect new construction in Flower Mound.

What it all costs, and how to fit it inside the option period

Here are the ranges quoted in DFW. Treat them as planning numbers, confirm the real quote when you book, and expect the top of each range on larger homes and anything hard to reach.

• General TREC inspection: roughly $375 to $550 for a typical single-family home, $500 to $750 as you move past 2,500 square feet, more on estate-sized homes.
• Hydrostatic drain test: $200 to $500 as a plumber's standalone call. One Dallas plumber publishes a flat $477 against what it calls a $625 regional average. Adding the water supply pressure test pushes the combined visit to $400 to $800.
• Sewer scope: $150 to $350 when bundled with the general inspection, $250 to $400 as a separate plumber visit.
• Structural engineer's report: $350 to $900 in the Dallas area for a written report on the home.
• WDI (termite) report: generally well under $300, often closer to $100 to $150.
• Pool and spa add-on: about $100 to $250 through the inspector; a pool company's leak test is priced separately.
• Sprinkler check: often under $150 as an add-on.
• Roofing inspection: frequently free from a roofer, or a modest fee from an independent inspector.
• Septic inspection: varies with the system type.

A worked example. Say you are buying a 1998 slab home in one of Flower Mound's established subdivisions, with a pool and mature trees. A reasonable due-diligence stack looks like this:

• General inspection on a 3,200 square foot home: $600
• Sewer scope bundled at the same visit: $300
• Hydrostatic drain test, licensed plumber: $450
• Pool add-on through the inspector: $200
• WDI report: $150
• Structural engineer's report: $650

That is $2,350 in inspections, spent to find out whether you are about to inherit an under-slab repipe, a pier job, or a cracked pool line. Every one of those is a repair negotiation you want to have inside the option period, not a surprise in year two. Our post on how to negotiate repairs after a Flower Mound inspection picks up from here.

The schedule is the hard part. A 7 to 10 day option period in Texas is short when you are coordinating four or five trades, and the clock does not stop for a plumber who cannot come until Thursday. The way I run it:

• Day 1 or 2: general inspection, with the sewer scope and pool and sprinkler add-ons booked onto the same visit. Get the hydrostatic addendum (48-1) signed the same day.
• Day 3 or 4: the plumber for the hydrostatic test and the engineer, both booked before the general report comes back, because you already know from the age of the house that you want them. Cancel if the report gives you a reason to.
• Day 5 or 6: roofer, HVAC, and anything the general report added to the list.
• Day 7: every report in hand, repair request drafted, decision made with time to spare.

If a specialist cannot get there in time, your agent can ask the seller for an extension in writing before the period expires. Sellers usually say yes to a day or two. They never say yes after the deadline has passed. The mechanics of the window itself are in our guide to how the option period works in Flower Mound.

How to decide which ones you actually need

You do not order everything on every house. The house tells you what to order.

• Built before 2000 on a slab: hydrostatic test and sewer scope, no debate. Engineer if the report flags anything or the disclosure shows prior repair.
• HVAC more than ten years old: the technician's service call.
• Pool: pool add-on at minimum, pool company leak test if the equipment or decking shows age.
• Roof more than ten years old, or any mention of hail: roofer, with photos, before you get your insurance quote.
• Septic or well: both specialists plus the Town's permit file, every time.
• Outbuilding, workshop, or detached suite: ask the inspector to add it, because it is optional and gets skipped otherwise.
• Everything else: general inspection, WDI, and sewer scope is a sensible floor on most resale homes here.

Your specific list depends on the house, the disclosure, and what you can live with. That is exactly the conversation I have with every buyer before the option period starts, so the inspections are booked before the clock is running instead of after the report scares us.

Frequently Asked Questions

Does a home inspection in Texas include a hydrostatic test?

No. TREC's guidance states that only a licensed plumber may perform a hydrostatic test on a home's plumbing system, so a home inspector cannot do it. It also requires the seller's written authorization under Paragraph 7A of the TREC contract, usually on TREC's Addendum for Authorizing Hydrostatic Testing (No. 48-1), which also settles who is responsible if the test causes damage.

Does a Texas home inspection cover termites?

Not the official report. A home inspector may note signs of wood-destroying insects, but the Texas Official Wood Destroying Insect Report can only be issued by a certified applicator or technician licensed in the termite category by the Texas Department of Agriculture. VA loans require that report; on other loans it is optional but inexpensive.

Are pools and sprinklers part of a standard Texas home inspection?

No. Under TREC rule 535.233, landscape irrigation, swimming pools and spas, outbuildings, private water wells, and septic systems are optional. The inspector is not required to inspect them, and will only do so if you ask and the inspector agrees, usually for an add-on fee.

How much do specialty inspections cost in the Flower Mound area?

Planning ranges quoted in DFW: a hydrostatic drain test $200 to $500, a sewer scope $150 to $400, a structural engineer's report $350 to $900, a WDI report typically under $300, a pool add-on $100 to $250, and a sprinkler check often under $150. A full stack on an older home with a pool commonly lands between $2,000 and $2,500 including the general inspection.

Can you get all of these done inside a 7 to 10 day option period?

Yes, if you book the specialists before the general report comes back rather than after. Schedule the general inspection with add-ons on day one or two, the plumber and engineer by day three or four, and the roofer and HVAC technician by day six. If a specialist cannot get there in time, ask the seller in writing for a short extension before the option period expires.

Book the specialists before the clock is running

A Texas home inspection is a limited visual survey by the state's own definition. It will tell you where to look, and on a Flower Mound home the places to look are the drain lines under the slab, the sewer line to the street, the foundation, the roof, and whatever is optional under the rules, which includes the pool, the sprinklers, and the septic system. The specialists who actually answer those questions cost a couple of thousand dollars combined, and they only help if they are inside the option period.

If you're planning a purchase in the next few months and want the inspection plan built before you write the offer, schedule a free Move-Up Strategy Call ... thirty minutes, no pitch, just a clear-headed look at where you are and what your best next move looks like.

This article is general information, not legal, insurance, or lending advice. Inspection standards, contract forms, and prices change; verify your specific situation with your agent, your inspector, your lender, and where appropriate a licensed Texas attorney.

About Brian White

Brian White helps families in Northwest DFW make their move-up cleanly, selling and buying in one synchronized step. He built BlueFuse Group on a simple standard: other-first service, proactive at every turn, faith and excellence in equal measure. Brian has been married to Tisha for 27 years and is dad to three adult sons. When he's not protecting a family's equity or untangling a tight closing timeline, you'll find him chasing a round of golf or at Valley Creek Church.

Schedule a Move-Up Strategy Call ... no pitch, just a clear-headed look at your next move.