Cracks are among the most common defects in London buildings, and among the most misunderstood. A structural crack assessment is a focused inspection by an RICS-qualified chartered surveyor to establish what a crack actually means: whether it is cosmetic shrinkage, normal seasonal movement, or a symptom of something more serious such as subsidence or structural overload. We examine the cracking, diagnose the likely cause, and give you clear written advice on what, if anything, needs to be done about it.
Most cracking in plaster and masonry is minor, but certain warning signs justify a professional assessment:
An early assessment is inexpensive reassurance; leaving progressive movement unexamined can affect insurance, saleability and, ultimately, the safety of the building.
We inspect the affected areas inside and out, measuring crack widths, mapping their pattern and direction, and examining related evidence such as floor slopes, external ground levels, drainage runs and nearby vegetation. Cracks are categorised using the widely accepted BRE Digest 251 scale, which classifies damage from Category 0, hairline, to Category 5, severe structural damage, based on width and ease of repair. This structured approach separates observation from opinion and gives you a diagnosis you can act on with confidence.
Your written report records each significant crack with its location, width, pattern and BRE Digest 251 category, supported by photographs. It explains the most likely cause, whether thermal movement, shrinkage, settlement, subsidence, lintel failure or alteration-related overload, and states clearly whether the damage appears progressive or historic where the evidence allows. It then sets out recommendations: simple redecoration, specific repairs, a period of crack monitoring, or further investigation such as drainage surveys or trial pits where that is genuinely warranted.
The cost of a crack assessment depends on the size and type of the property, the number of affected areas, how easily they can be reached, and whether you need a short letter report or a fuller document suitable for insurers or solicitors. Follow-up monitoring visits, where recommended, are priced separately. We will always explain the appropriate level of service for your situation before you commit, so you do not pay for more investigation than the cracking actually justifies.
A builder may offer to fill cracks; a chartered surveyor tells you why they appeared and whether they will return. Our RICS-regulated surveyors give independent advice with no interest in selling repair work, apply recognised methodology, and carry professional indemnity insurance. Where cracking becomes the subject of an insurance claim or a legal dispute, our reports can be prepared to the standard required of expert evidence under CPR Part 35, so the same firm can support you from first inspection through to resolution.
Sometimes a single inspection cannot say whether movement is live, and the honest answer is to measure. We install discreet monitoring studs or gauges across representative cracks and revisit at agreed intervals to record any change with precision. Over several months this builds objective evidence of whether cracking is progressive, seasonal or historic, which is often exactly what insurers require before authorising subsidence investigations or underpinning. Monitoring frequently proves that feared movement has in fact stopped, saving unnecessary and disruptive remedial works.
If cracking in your home or investment property is worrying you, do not wait for it to worsen. Contact Notting Hill Surveyors to arrange a structural crack assessment with one of our chartered surveyors.