BGS & Mining Remediation Authority — area-level, Great Britain

Subsidence risk in N4: Finsbury Park, London

BGS rates the area around N4 as clay-rich ground where shrink-swell (clay shrinkage) subsidence is a probable driver of ground movement as climate warms.

BGS rates the area around N4 as clay-rich ground where shrink-swell (clay shrinkage) subsidence is a probable driver of ground movement as climate warms. This is AREA-LEVEL British Geological Survey screening around the N4 representative point — generalised for national overview, on ~50 m to hex-scale grids — so it describes the neighbourhood, never a single property. Subsidence risk turns on the exact plot, foundations, trees and drainage, so a specific-address check and, if flagged, a survey are essential before you offer.

The three ground-movement drivers around N4

Clay shrink-swell (climate)

Probable

BGS GeoClimate UKCP18 rates the clay shrink-swell subsidence class here as Probable (2030 average scenario). Clay soils shrink in dry summers and swell when wet — the UK's commonest subsidence cause, expected to worsen with hotter, drier summers.

Coal & mining

Off-coalfield

Not in a coal-mining risk area — the property sits outside the recorded coalfield.

Recorded landslides

no data

Landslide records were unavailable for this area on the last refresh.

Indicative, area-level ground-stability screening — not a site investigation. Ratings are generalised for national overview uses and do not replace a Coal Mining Risk Assessment or site-specific geotechnical survey. These bands describe the ground around the N4 area on BGS national-overview grids — they are never a property-specific rating, and carry no distance-to-mine-shaft claim. Whether a specific home is at risk depends on its plot, foundations, trees and drainage.

Check a specific N4 address

This page is the area picture. The £24.99 Complete report runs the clay, coal and landslide ground screen against one exact address, alongside flood, radon and the other checks — the full ground-and-risk picture before you offer.

Get My Full Property Report — £24.99Ground-stability tool

Frequently asked questions

Is N4 at risk of subsidence?

BGS rates the area around N4 as clay-rich ground where shrink-swell (clay shrinkage) subsidence is a probable driver of ground movement as climate warms. These are area-level indicators from the British Geological Survey and Mining Remediation Authority — they describe the ground around N4, not any single home. Whether a specific property is affected depends on its plot, foundations, nearby trees and drainage, so check the exact address and, if flagged, commission a survey.

What causes subsidence in this area?

The three area-level drivers we screen are: clay shrink-swell (clay soils shrinking in dry summers and swelling when wet — the commonest UK cause, worsening with climate change), past coal or other mining (ground disturbance from historic workings), and recorded landslides (slope instability). Trees, leaking drains and made ground are property-level factors a survey assesses.

Does a subsidence flag stop me getting a mortgage or insurance?

Not automatically. Area-level ground risk can raise buildings-insurance premiums or prompt a lender to ask for a survey, especially if a property has a history of movement. A tribunal- or survey-confirmed subsidence claim is more material than an area screening. Always get a buildings-insurance quote on the specific address before you commit.

How do I check subsidence risk for a specific N4 address?

Ground stability is assessed at the property, not the outcode. The HouseCheckup Complete report runs the clay, coal and landslide screen against one exact address and pairs it with the flood, radon and other ground checks — the full picture before you offer.

Sources

Contains Mining Remediation Authority data © Mining Remediation Authority, licensed under the Open Government Licence v3.0. Contains British Geological Survey materials © UKRI 2026 (GeoClimate UKCP18 Open).