Structural Engineer's Report When Selling

When you sell a property in England or Wales, the buyer will commission a survey. If the surveyor identifies any signs of structural movement, cracking, or defects, they will recommend that a structural engineer carries out a more detailed investigation. At that point, the transaction stalls while the buyer arranges the inspection, waits for the report, and decides how to proceed.

As a seller, you can take control of this process by commissioning your own structural engineer's report before you list. This guide explains when a report is needed, what it covers, how much it costs, and how it can protect your sale.

When should a seller commission a structural report?

Not every property sale requires a structural engineer's report. For most houses in reasonable condition, the buyer's standard survey will be sufficient. However, there are several situations where commissioning a report proactively is strongly advisable:

• Visible cracking. If your property has cracks wider than 1mm in the masonry, brickwork, or render, a structural report classifies the severity and identifies the cause. See our guide on selling a house with structural cracks for more detail on crack classification.
• History of subsidence. If your property has a subsidence claim on record or is situated on clay soil in a high-risk area, buyers and lenders will expect documentation. Our guide on subsidence when selling covers the disclosure requirements in full.
• Foundation concerns. If there are signs of foundation movement, previous underpinning, or uneven floors, a report provides the evidence buyers need. See selling a house with foundation issues for guidance on preparing your sale.
• Extensions or structural alterations. If your property has had walls removed, extensions built, or loft conversions completed, a structural report can confirm that the work was carried out to an adequate standard, even if the original building regulations paperwork is missing.
• Older properties. Victorian and Edwardian houses, properties with solid walls, and buildings with original timber lintels are more likely to have age-related structural quirks that a buyer's surveyor will flag.
• Pre-emptive reassurance. Even where no obvious problems exist, some sellers commission a structural report for peace of mind, particularly when selling a high-value property where any delay carries a significant financial cost.

What does a structural engineer's report cover?

A structural engineer's report is a formal professional document that assesses the structural condition of a building. It is more focused and more detailed than a general homebuyer survey, concentrating specifically on the load-bearing elements of the property and any defects that affect structural integrity.

A typical report includes the following sections:

Visual inspection

The engineer inspects the property internally and externally, examining walls, floors, ceilings, the roof structure, foundation level (where visible), and the surrounding ground conditions. They will note any signs of movement, cracking, distortion, damp, or deterioration.

Defect identification and classification

Any defects are documented and, where applicable, classified using the BRE Digest 251 system. This classification runs from Category 0 (hairline cracks, negligible) to Category 5 (very severe, over 25mm wide). The classification gives buyers, surveyors, and lenders a standardised way to understand the severity.

Cause analysis

The engineer provides a professional opinion on the likely cause of any defects. Common causes include subsidence (downward ground movement, often due to clay shrinkage), settlement (natural compression under the weight of the building), thermal movement, lintel failure, roof spread, or defective alterations. Identifying the cause is critical because it determines what remedial action is needed.

Recommendations

The report will set out recommended next steps. These may include monitoring (installing crack gauges over 12 months to determine whether movement is ongoing), further investigation (such as trial pits to inspect foundations), or specific repairs. The engineer will indicate the urgency of each recommendation.

Structural adequacy opinion

The report concludes with the engineer's professional opinion on whether the building is structurally adequate in its current condition. If the engineer is satisfied that the property is safe and stable, this statement carries significant weight with mortgage lenders and buyers' solicitors. In some cases, the engineer may issue a formal certificate of structural adequacy, which is a specific document recognised by lenders and the Institution of Structural Engineers.

How much does a structural report cost?

The cost of a structural engineer's report depends on the size of the property, the complexity of the issues, and the engineer's location and experience. The following table gives typical costs for residential properties in England and Wales as of 2025:

For a more detailed breakdown, see our guide on how much a structural survey costs.

How the report helps your sale

A structural engineer's report serves several practical purposes in the sale process:

1. Prevents surprises during the buyer's survey. If the buyer's surveyor identifies a structural concern, they will recommend a specialist investigation. This creates delay and anxiety. If you have already provided a structural report, the surveyor can review your report and may accept its conclusions without recommending further investigation.
2. Reassures mortgage lenders. Lenders are cautious about properties with structural issues. A report from a chartered engineer confirming the building is structurally adequate, or that recommended repairs have been completed, helps the lender approve the mortgage without imposing retentions or special conditions.
3. Reduces the risk of renegotiation. One of the most common triggers for renegotiation is the buyer's survey revealing a problem the buyer did not expect. If you disclose the issue upfront and provide a professional report, the buyer factors the information into their offer from the start. Our guide on how to respond to buyer survey findings explains how to handle the process if renegotiation does arise.
4. Demonstrates transparency. Buyers are more likely to proceed with confidence when they see that the seller has been upfront about the property's condition. A professional report signals that you have nothing to hide.
5. Speeds up conveyancing. The buyer's solicitor will raise enquiries about any structural issues mentioned on the TA6 form. Having a report already available means your solicitor can answer those enquiries immediately, rather than waiting weeks for a new inspection to be arranged.

Finding the right structural engineer

The credibility of your report depends on the qualifications and standing of the engineer who prepares it. Buyers' solicitors and mortgage lenders will scrutinise the author's credentials.

Look for an engineer who holds one of the following designations:

• MIStructE or FIStructE — Chartered Member or Fellow of the Institution of Structural Engineers
• MICE or FICE — Chartered Member or Fellow of the Institution of Civil Engineers
• CEng — Chartered Engineer registered with the Engineering Council

The IStructE maintains a Find a Structural Engineer directory on their website, and the ICE has a member directory at ice.org.uk. Your solicitor or estate agent may also be able to recommend a local engineer with experience in residential property assessments.

Always confirm that the engineer carries professional indemnity insurance. This is standard for chartered engineers but should be verified, as the buyer's lender may ask for evidence of it.

What to do with the report once you have it

Once you have your structural engineer's report in hand, there are several steps to follow depending on the findings:

If the report confirms the property is structurally adequate

This is the best outcome. Provide a copy to your solicitor so it can be included with the contract pack. When the buyer's solicitor raises enquiries about the TA6 (particularly Section 7.4, which covers structural damage and subsidence), your solicitor can refer them directly to the report. You may also wish to make the report available to potential buyers during viewings, as it can reinforce confidence and encourage stronger offers.

If the report recommends monitoring

If the engineer recommends crack monitoring before they can confirm structural stability, you have a decision to make. You can wait for the monitoring period (typically 12 months) to conclude and then sell with a final report confirming stability. Alternatively, you can list the property with the monitoring in progress, but be aware that most mortgage lenders will not proceed until monitoring is complete. This limits your buyer pool to cash purchasers, who will typically expect a discount.

If the report recommends remedial work

Where the report identifies repairs that are needed, consider whether completing the work before listing is feasible. Repairs such as crack stitching, lintel replacement, or localised repointing can often be completed within a few weeks and allow the engineer to issue an updated report or certificate confirming adequacy. For more extensive work such as underpinning, the cost and timeline may make it impractical to complete before selling. In that case, disclosing the report and adjusting your price accordingly is a viable alternative.

Structural reports and the TA6 form

The TA6 Property Information Form asks specific questions about structural damage and subsidence in Section 7.4. You are legally obliged to answer honestly. If you are aware of cracking, movement, or any structural concern, you must disclose it.

Having a structural engineer's report transforms the way this disclosure is received. Without a report, a disclosure of cracking on the TA6 creates uncertainty and alarm. With a report, the same disclosure is accompanied by a professional assessment that explains the cause, classifies the severity, and confirms what (if anything) needs to be done. The buyer's solicitor can review the report and move forward with confidence, rather than raising a lengthy series of additional enquiries.

This is one of the most effective ways to prevent conveyancing delays. The back-and-forth of enquiries between solicitors is one of the biggest time drains in a property transaction, and providing a clear, authoritative report upfront eliminates an entire round of correspondence.

Common scenarios where a report makes the difference

The following scenarios illustrate how a structural report changes the dynamics of a sale:

Costs of not having a report

The cost of a structural engineer's report — typically £400 to £1,000 — is modest compared to the potential financial consequences of not having one:

• Renegotiation. Buyers who discover structural issues during their survey routinely negotiate the price down by significantly more than the cost of the repairs, because they are pricing in uncertainty as well as the repair itself.
• Collapsed sale. If the buyer's lender declines the property due to unresolved structural concerns, the sale falls through. The seller loses their legal fees (typically £1,000 to £2,000) and must start the marketing process again.
• Extended time on market. A property that has had a sale fall through carries a stigma. Future buyers will ask why the previous sale failed, and the property may sell for less as a result.
• Chain collapse. If you are buying another property at the same time, a delay or failure in your sale can cause the entire chain to collapse, affecting multiple parties.

Spending £400 to £1,000 upfront to prevent a £10,000 to £30,000 loss on renegotiation or a total sale collapse is a straightforward return on investment.

Sources

• Institution of Structural Engineers (IStructE) — Guidance on certificates of structural adequacy and Find a Structural Engineer directory: istructe.org
• Institution of Civil Engineers (ICE) — Member directory and guidance on structural assessments: ice.org.uk
• Building Research Establishment (BRE) — BRE Digest 251: Assessment of damage in low-rise buildings with particular reference to progressive foundation movement
• Royal Institution of Chartered Surveyors (RICS) — Home Survey Standard (4th edition), guidance on reporting structural defects: rics.org
• Law Society — TA6 Property Information Form, Section 7.4 (Structural Damage): lawsociety.org.uk
• Association of British Insurers (ABI) — Domestic subsidence claims data and guidance: abi.org.uk
• Engineering Council — Register of Chartered Engineers and competence standards: engc.org.uk

Frequently asked questions