Pre-Purchase Structural Survey
An independent structural assessment before you buy, so you understand the true condition and can negotiate or plan with confidence.
Structural Survey Services in London
Overview
What Is a Structural Survey?
A structural survey is a detailed engineering inspection carried out by a qualified structural engineer. Unlike a general property or building survey, it focuses specifically on the safety, stability and engineering performance of a building’s structure, its foundations, load-bearing walls, beams, floors and roof.
Whether you are buying a property, have noticed cracks or movement, or are planning renovations, our surveys give you accurate technical insight backed by professional engineering knowledge. Our reports explain clearly what the issue is, why it is happening, whether it is serious, and what repairs or actions are required, in plain English.
Because Lenio is led by chartered engineers (ICE and CABE), a Lenio structural survey is the focused engineer’s report that a general RICS building survey often recommends when a structural concern is flagged. We provide this service to clients throughout Croydon, Sutton and the wider capital.
Book a Structural Survey
Do You Need One?
When You Need a Structural Survey
A structural survey is worth arranging whenever you have a specific concern about the strength or stability of a building, rather than its general condition.
Buying a property
Especially older, larger, extended or unusually built homes in Croydon, Sutton and London, where hidden structural issues can be costly.
Cracks or movement
You have spotted cracking, bulging walls, sloping floors or other signs the structure may be moving.
Suspected subsidence
Signs of subsidence, heave or settlement, common in Croydon and Sutton’s clay soils and near trees, that need diagnosing.
Before major works
Planning an extension, loft or basement, or removing a wall or chimney breast, and want the structure checked first.
A mortgage retention
Your lender or their surveyor has flagged a structural concern and asked for a structural engineer’s report.
An insurance claim
You need an independent engineering assessment of damage, movement or subsidence to support a claim.
What We Offer
Our Structural Survey Services in Croydon, Sutton & London
Subsidence & Movement Investigation
Diagnosis of subsidence, heave, settlement and structural movement, with the cause identified and a clear remedy set out.
Crack & Defect Diagnosis
A focused specific-defect report on a single crack, damp-related issue or defect, explaining the cause, risk and recommended action.
Structural Report for Lenders
An engineer’s report and repair guidance where a mortgage valuation or homebuyer survey has raised a structural concern.
Commercial Structural Survey
Structural assessments of commercial and mixed-use buildings for owners, occupiers, buyers and investors across Croydon, Sutton and London.
Post-Works & Renovation Advice
Where a survey finds an issue, we can provide the design, calculations and strengthening advice to put it right.
The Inspection
What We Check in a Structural Survey
Our structural engineers assess the key elements that determine the safety and stability of your building.
Foundations & Settlement
Checking for movement caused by soil conditions, water, tree roots or poor original construction.
Cracks in Walls & Ceilings
Assessing whether cracks are cosmetic, thermal or structurally significant, and why they are occurring.
Load-Bearing Walls
Confirming the stability of the walls that carry the building’s loads, including past alterations.
Roof Structure
Inspecting rafters, trusses, purlins and connections for condition, spread and support.
Beams & Columns
Reviewing how key elements transfer loads through the building and whether they are adequate.
Floors & Distress Signs
Checking floors for deflection and looking for bulging, bowing or separation between elements.
Know the Difference
Which Survey Do You Need?
“Full structural survey” is often confused with a RICS building survey. Here is how they compare, and where a Lenio structural survey fits.
| Survey | Best for | Carried out by | Focus |
|---|---|---|---|
| RICS Level 2 Homebuyer Report | Conventional homes in reasonable condition | RICS Chartered Surveyor | Overall condition with traffic-light ratings |
| RICS Level 3 Building Survey | Older, larger or altered properties | RICS Chartered Surveyor | In-depth condition of all accessible elements |
| Structural Survey (engineer’s report) | A known or suspected structural problem | Chartered Structural Engineer – Lenio | Cause, risk and remedy for cracking, movement or subsidence |
| Specific Defect Report | One isolated issue, such as a single crack | Structural Engineer – Lenio | A detailed look at one defect and its cause |
Not sure which you need? Call Lenio and we will point you to the right report for your property, with no obligation.
Your Report
What You Receive
A clear, professional structural report you can act on, and share with your solicitor, lender or builder.
Full Structural Assessment
A complete evaluation of the building’s structural condition based on our on-site inspection.
Description of Defects
The type, location and visible symptoms of any issues found, with photographs.
Engineering Analysis of Causes
Why each issue is happening, from ground movement to overloading or material deterioration.
Risk Level Evaluation
Each issue categorised as minor, moderate or serious, so you know what matters.
Repair Recommendations
Practical repair or strengthening solutions, in clear, easy-to-understand language.
Next-Step Guidance
Where required, we can provide the design and calculations to carry out the remedial works.
How It Works
Our Structural Survey Process
A clear, straightforward process from first call to final report.
1
Initial consultation
We discuss your concerns and confirm the type of survey you need, then provide a fixed, no-obligation quote based on the property.
2
On-site inspection
A qualified structural engineer inspects the foundations, walls, beams, floors, roof and any cracks or movement, typically over a few hours.
3
Analysis & assessment
We establish the root cause and severity of any issues, using sound engineering judgement and UK standards.
4
Your engineering report
You receive a clear report, usually within a few working days, setting out findings, causes, risk levels and recommendations.
5
Ongoing support
If repairs or strengthening are needed, we can provide the design and calculations to help you move forward.
Why It Matters
Why Structural Surveys Are Important in Croydon, Sutton & London
Many serious structural issues are not visible during a standard viewing, so cracks, movement or hidden defects can go unnoticed and later lead to expensive repairs or safety risks. A structural survey helps buyers and owners make informed, confident decisions.
In Croydon and Sutton, many properties sit on London clay, and mature trees are common across both boroughs. This combination makes subsidence, settlement and structural movement a frequent concern. Period terraces, converted flats and extended homes across the capital add further complexity. A chartered engineer can tell you whether what you are seeing is cosmetic or serious.
A survey lets you understand the true structural condition, avoid unexpected repair costs, buy with confidence, plan works safely, and satisfy a lender or insurer where a structural concern has been raised. Where a shared wall or boundary is involved, our sister practice Lenio Party Wall Surveyors can help too.
Speak to a Structural Engineer in Croydon
Transparent Fees
What Shapes Your Survey Fee
Every structural survey is scoped and quoted individually, based on the property and the nature of your concern. A focused single-defect report is more straightforward than a full assessment of a larger or complex building. We always provide a fixed quote up front, with no obligation, so you know exactly what is included before we begin.
Building Characteristics
Property size, age, and construction form are key considerations when determining the extent of the structural assessment.
Extent of Structural Concern
The nature, scale, and potential causes of structural defects influence the level of investigation and reporting required.
Engineering Challenges
Access restrictions, complex structural layouts, and special construction requirements may increase inspection and design complexity.
Accreditation
The Institution of Civil Engineers (ICE)
The Chartered Association of Building Engineers (CABE)
Chartered, ICE & CABE Members
The Institution of Civil Engineers (ICE)The Chartered Association of Building Engineers (CABE)
Client Reviews
What Our Clients Say
Trusted by homeowners, buyers and property professionals across Croydon, Sutton and London.
Good to Know
Structural Survey FAQs
What is a structural survey?
A structural survey is a detailed engineering inspection of a building carried out by a qualified structural engineer. It focuses on the strength, stability and condition of the structure, including the foundations, walls, beams, floors and roof. Unlike a basic property inspection, it examines how the building is performing structurally and identifies any defects, movement or risks, explained in a clear report with practical recommendations.
How much does a structural survey cost in Croydon and Sutton?
The cost depends on the size, age and condition of the property and the nature of your concern. A focused single-defect report is at the lower end, while a full assessment of a larger or complex property costs more. We always provide a fixed, transparent quote before any work begins, so there are no surprises. Send us your details and we will quote quickly, with no obligation.
Do I need a structural survey before buying a house in Croydon, Sutton or London?
It is highly recommended when a property is older, larger, altered, unusually built, or shows visible cracks or movement. It reveals hidden structural problems that could lead to costly repairs, so you can proceed with confidence, plan any works, or renegotiate the price if issues are found. If your concern is the general condition rather than the structure, a RICS building survey may be the better fit.
What is the difference between a structural survey and a RICS building survey?
A RICS Level 2 or Level 3 building survey is a broad assessment of a property’s overall condition, carried out by a chartered surveyor. A structural survey is narrower and more technical, carried out by a structural engineer, focusing specifically on structural safety and the cause of any cracking, movement or subsidence, with an engineering-based remedy. For a specific structural concern, the engineer’s structural survey is usually the right choice.
Will my mortgage lender accept a structural engineer’s report?
Yes. Where a mortgage valuation or homebuyer survey flags a structural concern, lenders commonly ask for a structural engineer’s report, sometimes with an estimate of repair costs, before they will lend. Our chartered engineers provide exactly this kind of independent report, which can help release a mortgage retention or support your purchase.
Are cracks in my wall serious?
Some cracks are cosmetic and some indicate structural movement, subsidence or foundation problems. Width, location, direction and whether the crack is growing all matter. A structural survey lets an engineer establish the cause and tell you clearly whether it is minor, moderate or serious, and what to do about it. We can often give initial guidance from photos before arranging a visit.
Is a structural survey invasive?
No. A structural survey is a non-invasive visual inspection. The engineer assesses everything that is visible and accessible but does not lift floorboards or open up walls. If a concern is found in an area that cannot be accessed, the report will recommend a specific follow-up, such as a drainage (CCTV) survey or opening up in a targeted location.
How long does a structural survey take?
The on-site inspection usually takes a few hours, depending on the size and condition of the property. The written report typically follows within a few working days. It sets out the findings, explains the likely causes, categorises the severity and provides clear, professional recommendations.
Who carries out your structural surveys?
Our structural surveys are carried out by qualified, chartered structural engineers who are members of the Institution of Civil Engineers (ICE) and the Chartered Association of Building Engineers (CABE). This means you receive accurate, reliable and practical recommendations based on UK engineering standards and genuine structural expertise.
Which areas do you cover from Croydon?
Lenio Consultants is based in Croydon and carries out structural surveys across Croydon, Sutton, the whole of London including North, South, East, West and Central London and every borough, as well as the wider South East and UK. Wherever the property is, you receive the same chartered-standard inspection and clear reporting.
Book a Structural Survey in Croydon or Sutton
Tell us about the property and your concern, and our chartered structural engineers in Croydon and Sutton will arrange a survey and provide a clear, actionable report, with a fixed, no-obligation quote.