A structural inspection is most valuable when the engineer arrives with a clear question to answer and the information needed to answer it. This guide explains what a targeted structural inspection is, how it differs from a building survey, what to gather beforehand, what happens on the day, and what outcomes to expect afterwards.
What a targeted structural inspection is
A targeted structural inspection is a visit by a structural engineer to examine specific structural concerns and to give an opinion on them. It is defined by its scope: a particular crack, a deflecting floor, a suspect beam, a proposed alteration, or the condition of an identified element.
The inspection is usually visual and non-intrusive, supported by measurement, photography and, where useful, simple instruments. The engineer forms a view based on what can be seen, what the building's construction implies, and what the available records show.
What it is not
- It is not a full building survey, and does not cover finishes, services, damp, roofing condition or valuation
- It is not a homebuyer's report, although it is frequently commissioned because one recommended further structural advice
- It is not an intrusive investigation — opening up, trial holes and material testing are separate exercises
- It is not a structural design; if remedial or alteration design is needed, that follows as a further stage
- It cannot report on what is concealed behind finishes, under floors or below ground unless access is provided
Drawings and previous reports worth providing
- Any existing architectural or structural drawings, however old or incomplete
- Previous structural reports, calculations or specialist investigations
- Homebuyer or building survey reports that prompted the enquiry
- Records of previous alterations, extensions, underpinning or repairs
- Insurance correspondence where a claim has been made or considered
- Drainage plans, ground investigation reports or tree surveys, where available
Photographs that help
Photographs sent in advance often shape the inspection itself, allowing the engineer to arrive with a working hypothesis and the right equipment. Wide shots establish context; close shots with a scale establish detail. Both are useful, and neither replaces the other.
- Each elevation of the building, taken from far enough back to show the whole facade
- Every area of concern, photographed wide and then close with a scale
- Both sides of any affected wall, floor or ceiling
- Roof space, cellar and any accessible voids
- Ground conditions around the building, including drainage, vegetation and paving
Defect history
The history of a defect is often more revealing than its current appearance. When it was first noticed, whether it has changed, whether it varies seasonally, whether anything happened around the time it appeared — building work, a leak, a nearby excavation, a period of drought — all narrow the range of plausible explanations.
A short written chronology, even a few lines, is one of the most useful things a client can prepare.
Access
Access frequently determines how much value an inspection delivers. If the roof space is inaccessible, the cellar locked, or the affected wall behind fitted furniture, the engineer's conclusions will necessarily be more qualified.
It is worth confirming in advance what can be reached safely, whether ladders or keys are needed, whether a tenant or neighbour must be notified, and whether any area presents a hazard. Where working at height or confined space access is required, that must be arranged as a separate, properly controlled activity.
Previous alterations and repairs
Alterations change load paths, and previous repairs indicate that something was once considered a problem. Both are directly relevant. Knowing that a chimney breast was removed, that an opening was formed, that the roof was re-covered with a heavier material, or that a section of wall was rebuilt provides context that is otherwise difficult to establish on a single visit.
Where the work was carried out under building control, the associated approvals and completion certificates are worth retrieving.
Monitoring information
If any monitoring has already been undertaken — dated photographs, tell-tale readings, level surveys — it should be provided in full, including the periods when nothing changed. Partial data can be actively misleading, and a record showing stability is as valuable as one showing movement.
What happens during an inspection
- A discussion of the concern, its history and any events associated with it
- A walk around the exterior, looking at elevations, ground conditions, drainage and vegetation
- Internal inspection of the affected areas and of the structure above and below them
- Measurement of crack widths, spans, member sizes and levels where relevant
- Inspection of roof space, cellar or voids where safely accessible
- Systematic photography for the record
- An initial verbal view on the day, where it is responsible to give one
Potential further investigations
- Opening up of finishes to expose structure at specific locations
- Trial holes to establish foundation type, depth and ground conditions
- Drainage testing where water ingress or leakage is suspected
- Monitoring over a defined period, typically spanning a seasonal cycle
- Material testing or specialist survey — for example concrete cover, timber decay or metal identification
- Ground investigation where ground-related movement is a genuine candidate
Possible outcomes
An inspection can reasonably conclude in several ways: that no structural action is required; that the matter is not structural but relates to finishes, damp or services; that monitoring is the proportionate next step; that further investigation is needed before a conclusion can be reached; or that specific remedial or strengthening work should be designed.
A conclusion that no structural work is required is a legitimate and frequently useful outcome, particularly during a property transaction, and does not represent a wasted appointment.
Key considerations
- A targeted inspection answers defined structural questions; it is not a general building survey.
- Access largely determines how definite the engineer's conclusions can be.
- Defect history and dated photographs are often the most valuable information a client can supply.
- Non-intrusive inspection has limits; further investigation is sometimes the correct recommendation.
- 'No structural action required' is a valid and useful outcome.
Related BES tools and services
Related guidance
Arranging an inspection?
General guidance only goes so far. Describe your building and what you are planning, and you will receive project-specific advice from a Chartered Structural Engineer.
Important limitations
This publication provides general information only and does not constitute structural engineering advice, design or assessment. Project-specific engineering requirements should be established by an appropriately qualified structural engineer.
BES-TG-004 · Version 1.0 · Reviewed August 2026 · Next scheduled review August 2027