Statutory Diligence GuideUpdated October 2026Follow on Google★

Free Subsidence Risk Checker by Postcode: How Soil & Foundation Audits Work

Statutory Source: BGS GeoSure & NHBC Standards Chapter 4.2

Quick Answer: Free Subsidence Risk Checker by Postcode: How Soil & Foundation Audits Work

Our free online Subsidence Risk Checker cross-references your postcode against BGS GeoSure soil plasticity indices, combines it with your property's construction era (estimating foundation depth from 450mm Victorian footings to 1.5m modern engineered piles), and factors in NHBC Chapter 4.2 tree root desiccation distances to generate an instant composite structural vulnerability rating. This provides homebuyers with instant conveyancing diligence before instructing a £600+ physical survey.

Want to check your exact property or address?Check Your Postcode Now

The Multi-Layer Diligence Engine Explained

Traditional environmental searches present isolated data points. Our algorithm synthesizes three interconnected risk factors:

1. Geological Subsoil Baseline: Retrieves BGS GeoSure ratings for shrink-swell, dissolution, and slope stability.

2. Structural Vulnerability Matrix: Modulates the soil risk based on when the house was built. A Victorian home on London Clay receives a 'High Risk' rating, whereas a 2015 home on identical soil receives a 'Low Risk' rating due to deep engineered foundations.

3. Environmental Accelerators: Considers nearby watercourses, flood plain proximity, and mature street tree canopies.

Follow Property Due Diligence on Google

Official Feed

Add our domain as a preferred source to receive priority property law guides, Land Registry data releases, and statutory alerts directly in your Google app & Discover feed.

Set as Preferred Source

100% Free Baseline Report • No Sign-Up or Password Required

Instant 3-Second Statutory Screening

Check Any Property Across 12 Official Statutory Registers

Conducting property due diligence requires cross-referencing multiple public registries. Run a free instant desktop screening across Environment Agency flood models, British Geological Survey subsidence data, UKHSA radon maps, HM Land Registry sold prices, and local planning constraints.

Evaluating an offer?Run an Instant UK Property Check on the Homepage

Environment Agency FloodingSurface water, rivers & sea risk bands

BGS Ground StabilityShrink-swell clay & subsidence risk

UKHSA Radon Gas PotentialOfficial radon class & protection rules

HM Land Registry PricesHistorical transactions & tenure type

EPC Energy & RdSAP SpecsOfficial construction era & wall fabric

Planning Applications BufferRecent nearby planning notices (500m)

✓ Zero payment details required✓ Instant automated browser report✓ Direct links to official statutory sources

Conveyancer or Surveyor? View Pro Practice Plans →

UK Statutory Due Diligence Silo

Official Primary Verification Registers

Cross-reference property diligence across verified UK government open registers under the Open Government Licence v3.0:

Category: Subsidence & Ground Stability

Property Age & RdSAP Era

Official construction age bands, wall specifications, and earliest conveyance dates.

MHCLG Energy ActOpen Tool

Council Tax & Precepts

Statutory Band A–H ratios, police/fire levies, and 1 April 1991 baseline thresholds.

Local Govt Finance Act 1992Open Tool

Public Rights of Way (PRoW)

Conclusive legal proof of footpaths, bridleways, and restricted byways on land.

Wildlife & Countryside Act 1981Open Tool

Planning & Consultations

Live planning applications, 21-day neighbor notices, and permitted development appeals.

Town & Country Planning Act 1990Open Tool

Flood Risk & Surface Water

Statutory Flood Zones 1, 2, 3, 30/100/1000-year pluvial models, and Flood Re rules.

Flood & Water Mgt Act 2010Open Tool

Land Registry Sold Prices

Verified historical completion prices, title deed values, and regional ONS house price indices.

Land Registration Act 2002Open Tool

Stamp Duty (SDLT)

Exact progressive residential thresholds, £300k FTB relief, and 5% additional home surcharges.

Finance Act Statutory ScheduleOpen Tool

Need all 7 statutory checks compiled for a specific property? Run a Free Baseline Due Diligence Report:

Run Combined Search

Topical Knowledge Cluster

Inspect Any UK Property on Our BGS Subsidence & Ground Stability Postcode Checker

Run an instant preliminary screening across official government databases including the MHCLG EPC register, HM Land Registry, and Environment Agency records.

Launch BGS Subsidence & Ground Stability Postcode Checker

Official Statutory Notice & Guidance:

This guide is compiled for informational due diligence referencing official statutory records from BGS GeoSure & NHBC Standards Chapter 4.2 under the Open Government Licence v3.0. Legal titles and physical structural condition should always be independently inspected by a qualified conveyancing solicitor and chartered RICS surveyor prior to legally binding property commitments.