The pre purchase home inspection in Texas, and where an engineer fits

A pre purchase home inspection in Texas is a visual survey of a one to four family house by an inspector licensed by the Texas Real Estate Commission, made to minimum standards set by rule and reported on a form the commission promulgates. It is the right first step for almost every buyer, and because its limits are written into the same rules, a buyer who knows them can tell within a day of the report whether a structural item needs an engineer before the option period ends.

Where it does, the scope 254 Engineering describes for a foundation evaluation is on the foundation inspection page, and for a roof on the roof certification page.

The contract sets the clock

Rule 537.28 makes TREC form 20-18 the contract for residential resale. Paragraph 7A lets the buyer have the property inspected by inspectors the buyer selects, licensed by TREC or otherwise permitted by law to make inspections, and requires the seller to turn on existing utilities at the seller's expense. The paragraph says the buyer may have inspections made, which means the form allows them rather than requiring them.

The termination option is what gives the inspection its force. It grants the buyer an unrestricted right to terminate by notice within the time the contract sets, and the option fee is not refunded. Everything in this post has to fit inside that window, including any engineer who is called in after the first report arrives.

What the inspector must look at

Rule 535.227(a)(2) sets the minimum requirements for inspecting a substantially completed one to four family unit, and subsection (a)(3) describes the inspection as a limited visual survey and basic performance evaluation, not a comprehensive investigation or exploratory probe. The report form, REI 7-6, lists the structural items in order under its first heading:

• Foundations, and grading and drainage.
• Roof covering materials, and roof structures and attics.
• Walls, ceilings and floors, doors and windows.
• Stairways, fireplaces and chimneys, and porches, balconies, decks and carports.

For the foundation, rule 535.228(a) requires a written opinion on its performance, the type of foundation, and the vantage point from which any crawl space was inspected, and it asks the inspector to report visible indications of adverse performance such as binding, out of square or non latching doors. TREC's own guidance on that rule says the opinion rests on visual inspection only.

What the inspector is not required to do

The rules are just as specific about the limits, and the limits are what decide whether an engineer is needed. Under rule 535.227 a TREC inspector is not required to:

• use specialized equipment, which the rule lists as including elevation tools, drain cameras, drones and ladders reaching above one story;
• perform elevation measurement, calculations, or destructive testing;
• determine the cause or source of a condition, or the cause or effect of a deficiency;
• determine compliance with codes, or insurability;
• inspect anything buried, hidden, latent or concealed;
• recommend or provide engineering, architectural or appraisal services.

Rule 535.228(a) adds access limits. The inspector need not enter a crawl space with less than 18 inches of headroom or an access opening smaller than 24 by 18 inches.

REI 7-6 puts the consequence on the buyer in plain words: it is the client's responsibility to obtain further evaluations or cost estimates from qualified service professionals for items reported as deficient. How a home inspection differs from a structural inspection on the day itself is described on the structural inspection page.

When the report should send you to an engineer

• The foundation section reports adverse performance, or lists indications such as doors that bind across a whole side of the house.
• The roof structure section reports roof surface deflection tied to framing or decking, or the attic was not entered because of access limits.
• Walls or floors are marked deficient for structural reasons rather than finishes.
• The seller's disclosure notice marks previous structural repair or soil movement.
• The lender's appraisal notes settlement. Fannie Mae's Selling Guide then requires evidence of correction or a professionally prepared report, based on an inspection, that the condition does not pose any threat of structural damage.

Where a crack is the item in question, a crack in the foundation sets out how to read it. For the measured evaluation itself, the scope 254 Engineering describes is on the foundation inspection page.

The roof before closing

A roof inspection before buying a house is two different things depending on who makes it, and the difference is the structure under the covering.

What the home inspector checks

Rule 535.228(c) requires the inspector to inspect the roof covering from the roof surface and to report the covering type, the vantage point, evidence of water penetration and evidence of previous repairs. TREC's rule notice for an amendment adopted on August 10, 2026 describes the requirement as walking the surface where that is safe and will not damage the covering. The rule does not require the inspector to determine remaining life or the number of layers, or to identify latent hail damage.

Rule 535.228(d) covers roof structures and attics. The inspector reports the vantage point and insulation depth, and reports as deficient roof surface deflections tied to framing or decking problems and defects in framing and decking. The inspector need not enter an attic whose opening is smaller than 22 by 30 inches or where headroom is under 30 inches.

What an engineer's structural roof assessment covers

An engineer's roof assessment narrows the question to the roof as a structure: the framing, the decking where it can be observed from below, deflection along ridges and rafters, and evidence of prior storm damage or repair to the load bearing members. On this firm's roof line the result is a sealed letter stating the observed condition on the date of inspection. It does not estimate remaining service life, and it says so.

That last point matters to buyers because a lender or carrier sometimes asks for a remaining life figure. The roof certification page explains what the sealed letter does and does not state, so the question can be settled with the lender before anyone climbs a ladder.

When a buyer should commission one before closing

• The home inspector reports deflection tied to framing or decking, or could not enter the attic.
• The lender or the insurance carrier has asked in writing for an engineer's roof certification.
• The house is inside the Texas windstorm catastrophe area and the roof's certificate status is unclear, which is the subject of windstorm inspection for coastal buyers and of roof certification versus WPI-8.
• A significant storm has passed since the inspection. What to look for is set out in the hurricane damage structural checklist.

Read the seller's disclosure before the inspection

Section 5.008 of the Property Code requires a seller of a single dwelling unit to give the buyer a written notice of the property's condition, completed to the best of the seller's belief and knowledge. The statutory form asks about defects in the foundation and slabs, and asks whether the seller is aware of previous structural or roof repair and of landfill, settling, soil movement or fault lines.

A buyer who reads those answers before the inspection can point the inspector at them. The section does not apply to every transfer: subsection (e) exempts, among others, foreclosure sales, transfers by a fiduciary administering an estate, and new homes not previously occupied.

A sequence that fits inside an option period

• Read the seller's disclosure notice the day the contract is signed.
• Book the TREC inspection for the first days of the option period.
• Read the foundation, roof structure and walls sections first, and list every item marked deficient for structural reasons.
• If any item is on the list, call an engineer the same day with the report in hand and the written question it raises.
• Ask the lender, early, whether its appraisal or its own rules call for an engineer's report, and get the wording in writing.

An engineer brought in early, with a defined question and the inspector's report, has the best chance of answering inside the window that remains. The foundation inspection page sets out what that evaluation measures, and the published price list states each fee before the visit.