Cracks, movement and monitoring
What does a subsidence survey cost?
Most cracking in a house is not subsidence, and the fee depends on how far the investigation has to go. A structural engineer's visual inspection and written report is the usual first professional step, typically £300–£800 in 2026 quotes depending on region, property size and report depth. Full investigation, level monitoring, drainage and root work are priced separately, and if you hold buildings insurance the normal first move is to tell your insurer before commissioning anything. Tell us what you are seeing and local structural engineers will quote you directly.
What happens next
- Tell us what you are seeing, the property type and how long it has been going on. Two minutes, no account.
- We pass your details to structural engineers covering your postcode, and to no one else.
- They contact you directly with their fee for the work your property actually needs.
Subsidence Survey Cost is a free introduction service operated by Ellul Solutions Ltd; we pass your details to relevant local structural engineers who quote you directly. We may receive a fee from providers; you pay nothing and are under no obligation. We are not engineers, surveyors or insurance intermediaries, we are not affiliated with any body named on this site, and nothing here is structural, legal or insurance advice. The one price range quoted here is a typical 2026 quote range that varies by region, property size and report depth, not a fixed price.
What drives the cost of a subsidence investigation
Last updated
Subsidence work is not one purchase. It is a sequence, and each stage is quoted separately. This table sets out the factors that decide what you pay, why each one moves the price, and the question to put to the engineer before you accept a fee.
Compiled from the standard sequence of a UK domestic subsidence investigation: initial structural inspection, a monitoring period, then targeted investigation of drainage and vegetation before any repair scheme is designed. It is a cost-driver table rather than a price list, because the only stage with a reliably typical market price is the initial inspection and report; everything after it is scoped to the individual building. The one figure quoted on this site, £300–£800 for a domestic structural engineer's visual inspection and written report, is a typical 2026 quote range that varies by region, property size and report depth, not a fixed price. Get quotes for your own property through the form above.
| Factor | Why it moves the price | What to ask for |
|---|---|---|
| Inspection and report versus full investigation | A visual inspection with a written opinion is a few hours of an engineer's time. A full investigation adds trial pits, soil sampling and lab work, each of which is a separate site visit and a separate specialist. | A fixed fee for the inspection and report, stated in writing, with the investigation stages priced as options rather than assumed. |
| Monitoring duration | Movement is diagnosed by watching it. Level or crack monitoring is normally read repeatedly across a full seasonal cycle, so the cost is the number of visits multiplied by the visit rate, plus the interpretation at the end. | How many readings, at what interval, over what total period, and whether the closing interpretation report is included in the quoted figure. |
| Drainage investigation (CCTV survey) | Leaking drains are one of the common causes of localised ground movement, so a CCTV drainage survey is often commissioned early. Cost follows the length of run surveyed, access, and whether jetting is needed first to see anything. | Whether jetting is included or extra, and whether you get the raw footage and a coded report, not just a verbal summary. |
| Vegetation and root identification | Where clay shrinkage is suspected, roots recovered from trial pits are identified to species by a laboratory so the responsible tree can be established. That is a lab fee plus an arboricultural opinion on top of the engineer's time. | Whether root identification and any arboricultural report are inside the quote or billed separately. |
| Whether the insurance claim route covers it | Subsidence investigation and any resulting works are normally dealt with as a buildings insurance claim, with the insurer appointing and paying for the investigation subject to the policy excess. Commissioning work privately before speaking to the insurer can mean paying for it yourself. | Your own policy schedule: what the subsidence excess is and what the insurer requires before work starts. Ask the engineer whether they routinely work on insurer-appointed claims. |
| Access, property size and construction | A large detached house, a listed or non-standard building, restricted side access, or movement affecting several elevations all add inspection time and often extra trial pits. | A site visit or photographs before the fee is fixed, so the quote reflects the actual building rather than an assumed semi. |
| Repair scheme design and supervision | If a repair scheme is needed, designing it, specifying it and supervising the contractor are professional fees in their own right, separate from the diagnostic work that came before. | A separate line for design and supervision, so you can see what is diagnosis and what is delivery. |
- A domestic structural engineer's visual inspection and written report on cracking is typically quoted at £300–£800 in 2026, varying by region, property size and report depth.
- Level monitoring for suspected subsidence is normally read across a full seasonal cycle, so a diagnosis takes months rather than days.
- Subsidence investigation and any resulting works are normally handled as a buildings insurance claim subject to the policy excess, not as work the homeowner commissions blind.
Cite this page
“What drives the cost of a subsidence investigation”, Subsidence Survey Cost, https://subsidencesurveycost.co.uk/ (updated 2026-08-14). Compiled from the standard sequence of a UK domestic subsidence investigation: initial structural inspection, a monitoring period, then targeted investigation of drainage and vegetation before any repair scheme is designed. It is a cost-driver table rather than a price list, because the only stage with a reliably typical market price is the initial inspection and report; everything after it is scoped to the individual building. The one figure quoted on this site, £300–£800 for a domestic structural engineer's visual inspection and written report, is a typical 2026 quote range that varies by region, property size and report depth, not a fixed price. Get quotes for your own property through the form above.
Worth knowing
Every figure sourced and dated.
- Structural engineer report cost in the UK: what you are paying for
A domestic structural engineer's inspection and report is typically £300–£800 in 2026 quotes. What is in the fee, what is not, and how to compare two quotes properly.
- Is it subsidence, or just cracking? How the difference is established
Most cracks in a house are not subsidence. What thermal, shrinkage and settlement cracking look like, what raises genuine concern, and how an engineer tells them apart.
- Subsidence investigation and monitoring: the sequence and what it costs
Inspection, then monitoring across a seasonal cycle, then drainage and root investigation, then a repair scheme. What each stage involves and what drives its price.
- Subsidence risk by postcode: what actually determines it
There is no free official postcode checker for subsidence. What drives area risk, which searches and reports really cover it, and what a postcode cannot tell you.
Straight answers
How much does a subsidence survey cost?
There is no single price, because a subsidence survey is a sequence rather than one product. The first step, a structural engineer's visual inspection and written report, is typically quoted at £300–£800 in 2026 for a standard domestic property, varying by region, property size and report depth. Monitoring, drainage surveys, trial pits and soil testing are each quoted separately, and where a buildings insurance claim is open the insurer normally appoints and pays for the investigation subject to the policy excess.
Should I tell my insurer before getting a survey?
If you hold buildings insurance and you suspect ground movement, telling the insurer is normally the first step, because investigation and any resulting works are usually handled as a claim. Commissioning your own investigation first does not guarantee the insurer will rely on it. We do not give insurance advice and we do not recommend insurers; check your own policy schedule and speak to your insurer.
Is cracking in my house subsidence?
Usually not. Thermal movement, drying shrinkage in new plaster or render, settlement of new construction and localised defects such as failed lintels or wall ties account for most cracking in houses. Subsidence is suspected where cracking is progressive, tapered, visible on both faces of the wall, and accompanied by a plausible mechanism such as clay soil with a large tree nearby or a leaking drain.
How long does the whole process take?
Months. The inspection itself is one visit, but monitoring is normally read across a full seasonal cycle so that seasonal clay movement can be separated from progressive movement, and targeted investigation follows that. Anyone offering a diagnosis and a repair scheme within days has skipped the stage that establishes what is actually happening.
Will I need underpinning?
Often not. Many cases are resolved by managing or removing the vegetation drying the soil, or by repairing a leaking drain, then making good once movement has stopped. Underpinning is one remedy among several, it is expensive and disruptive, and it is normally considered only after investigation has identified the cause.
Is this quote service really free?
Yes, free to you, with no obligation to accept any quote. We pass your details only to relevant local structural engineers, who contact you directly; we may receive a fee from those providers, which is how the service is funded.