Specific Defect Survey
A targeted investigation into a single, specific defect or issue you have identified in a property. Rather than a full building survey, the surveyor focuses exclusively on the reported problem — diagnosing the cause, assessing the seriousness and recommending remedial action.
Whether you have noticed a crack in a wall, a damp patch, a sagging ceiling, a leaking roof or any other isolated concern, a specific defect survey gives you a thorough, focused diagnosis without the cost and time commitment of a full building survey.
Specific Defect Survey
Our Home Surveyor & Property Valuer Accreditation & Professional Membership
Our Specific Defect Surveys are carried out by qualified surveyors who belong to the professional bodies that set UK property standards. Every report is prepared to recognised guidance and is completely independent, so you can rely on the findings when you buy, sell or value a home.
What Is a Specific Defect Survey?
A specific defect survey — also called a focused defect investigation or single-issue survey — is a targeted, in-depth inspection of one particular defect or concern you have identified in a property. Rather than inspecting the entire building, the surveyor concentrates solely on the reported problem, using specialist knowledge and equipment to diagnose the root cause, assess the seriousness and specify the remedial work required. It is a cost-effective alternative to a full building survey when you have a single, isolated issue you need answered.
What It Covers
- A thorough inspection of the specific defect you have reported
- Root cause analysis — identifying why the defect has occurred
- Assessment of the seriousness of the defect and whether it is likely to worsen
- Clear, actionable recommendations for the remedial work required
- Indicative cost guidance for the recommended works
- A written report with photographs and findings
What It Does Not Cover
- A general inspection of the rest of the property
- Identification of other defects beyond the scope of the reported issue
- A market valuation of the property
- Testing of gas, electrical or drainage installations
- Carrying out the actual remedial works — we diagnose and specify only
When Should You Commission a Specific Defect Survey?
A specific defect survey is the right choice in particular situations. Here is how to tell if it suits your circumstances.
Suitable For
- A single, known defect you want investigated
- Cracks, damp patches, leaks or other isolated issues
- Following up on a concern flagged in a previous survey
- Before commissioning repair work — to ensure the diagnosis is correct
Not Suitable For
- Multiple defects or general condition concerns (use a Building Survey)
- Pre-purchase surveys (use Level 2 or Level 3)
Not sure whether you need a specific defect survey or a full building survey? Speak to a surveyor for free, no-obligation advice.
What Is Included in a Specific Defect Survey
Every specific defect survey we produce includes the following as standard.
Focused Investigation
The surveyor concentrates solely on the reported defect, providing a thorough diagnosis. No time is spent inspecting unrelated areas of the property — the entire survey is dedicated to understanding your specific concern.
Cause Analysis
Root cause identification — not just what the defect is but why it has occurred. We look beyond the visible symptoms to understand the underlying mechanism, whether it is structural movement, water ingress, material failure, thermal expansion, poor workmanship or something else entirely.
Seriousness Assessment
Clear assessment of how serious the defect is and whether it is likely to worsen. We categorise the severity and give you an honest, independent view of the risk — so you know whether the issue needs urgent attention or can be monitored over time.
Remedial Specification
Specific recommendations for the repair or remedial work required. Our specification is detailed enough for you to obtain comparable quotes from at least three competent local contractors, giving you confidence that the work proposed is necessary and proportionate.
Cost Guidance
Indicative cost guidance for the recommended works to help you budget. While the final price will depend on the contractor you choose and market conditions at the time, our guidance gives you a realistic range to expect, so you are not surprised when quotes come in.
Written Report
A clear, plain-English report documenting the defect, its cause, the severity assessment, the remedial specification and cost guidance, supported by photographs taken during the inspection. Delivered within 5 working days of the site visit.
How the Specific Defect Survey Process Works
From enquiry to report — straightforward and transparent.
Get a Quote
Contact us with the property details and a description of the defect you have identified. Include photographs if possible. We respond within 24 hours with a fixed-price quote, tailored to the specific defect and the time needed on site.
Book the Inspection
Choose a convenient date. We typically schedule within 5–10 working days of your instruction, subject to access and availability. We confirm all details in writing before the appointment.
Surveyor Inspects
The surveyor attends the property and carries out a thorough investigation of the reported defect, using specialist equipment where appropriate. The inspection typically takes 1–2 hours, depending on the nature and complexity of the defect.
Receive Your Report
Your detailed specific defect report — including findings, photographs, root cause analysis, severity assessment, remedial specification and cost guidance — is delivered within 5 working days of the inspection.
Types of Defect We Commonly Investigate
We have experience diagnosing a wide range of specific defects in residential properties. Here are some of the most common issues we are asked to investigate.
Cracks in Walls
Cracking is one of the most common defects reported by homeowners and buyers. Cracks can range from harmless hairline shrinkage cracks in plaster to serious structural fractures indicating foundation movement. Our surveyor will assess the location, width, pattern and direction of the cracking, determine whether it is active or historic, and advise whether it is cosmetic, a maintenance issue or a structural concern requiring further action.
Common causes: thermal expansion and contraction, settlement, subsidence, lintel failure, corroded wall ties, shrinking timber, sulphate attack on mortar.
Damp & Moisture Issues
A damp patch appearing on a wall or ceiling is a common cause for concern — and it often signals a wider issue that needs to be understood before repairs are commissioned. Our surveyor can diagnose whether the damp is rising damp, penetrating damp or condensation, identify the source of moisture ingress or build-up, and specify the appropriate remedial treatment. We use moisture meters and thermal imaging to provide objective evidence.
Common causes: leaking pipes, failed damp-proof course, defective pointing, blocked gutters, inadequate ventilation, bridged cavity walls.
Roof Defects & Leaks
A leaking roof or a sagging roofline is a serious concern that often requires urgent attention. Our surveyor can inspect the roof structure from within the loft space and externally where accessible, identify the source of water ingress or structural weakness, and specify the repairs required. We can also assess whether a roof is approaching the end of its service life and advise on replacement or overlay options.
Common causes: slipped or broken tiles, failed flashing, blocked valleys, rotten fascias, condensation in the roof void, structural sagging of purlins or rafters.
Specific Defect Survey Questions
When should I commission a specific defect survey instead of a full building survey?
A specific defect survey is the right choice when you have identified a single, isolated issue and do not require a full building survey. For example: you have noticed a crack in one wall, a damp patch in one corner or a leak in one area. Commissioning a full building survey for a single defect would be disproportionate. However, if you have multiple concerns or are buying the property for the first time, a full Level 2 or Level 3 survey is more appropriate.
Can the surveyor investigate hidden defects?
The surveyor can only inspect visible and accessible areas without causing damage. If the defect is not visible — for example, a leak behind a wall or a structural issue concealed by plasterboard — the survey may need to be combined with more invasive investigation. We will advise you if this is the case before we attend, so you can arrange access if needed. In some situations we may recommend monitoring the defect over time if it is not possible to diagnose it definitively in a single visit.
How much does a specific defect survey cost?
A specific defect survey costs from approximately £250 plus VAT, depending on the nature of the defect, the property location and the time required on site. We provide a fixed-price quote within 24 hours. Because the scope is focused, it is typically less expensive than a full building survey.
How long does a specific defect survey take on site?
A specific defect survey typically takes between 1 and 2 hours on site, depending on the nature and complexity of the defect. A straightforward issue such as a single crack in an accessible wall may take less than an hour to investigate and document. A more complex problem — such as a leak with an unclear source or a structural defect requiring inspection from multiple vantage points — may take up to two hours. The surveyor will give you an estimated duration when they provide your quote, based on the information you have supplied about the defect.
What should I do to prepare for the surveyor's visit?
Before the surveyor arrives, ensure that the area around the defect is accessible and clear of furniture, stored items or obstructions. If the defect is in a loft space, make sure the loft hatch is accessible and the area is safely lit. If the defect is external — such as a crack in an external wall or a roof issue — ensure the surveyor can access the relevant area safely from ground level. You do not need to be present during the inspection, although it is often helpful if you are available to point out the defect and describe any history or changes you have observed over time.
Do you cover my area for a specific defect survey?
We provide specific defect surveys across all seven of our counties: Bedfordshire, Buckinghamshire, Cambridgeshire, Hertfordshire, Northamptonshire, Greater London and Oxfordshire. Every surveyor who works with us is based locally and understands the local geology, building types, common defects and construction methods in their area. There are no travel surcharges for any location within our coverage area — the price we quote is the price you pay, regardless of where you are within our seven counties.
Get a Fixed-Price Specific Defect Survey Quote
Free, no-obligation quote within 24 hours. Independent, impartial advice with no ties to building contractors — we diagnose and specify only.