Live satellite measurements for the whole UK

See the ground move.

Radar satellites measure the height of almost every building in the UK every few days, to the millimetre. Check any postcode, free.

Try

Two views, one measurement.

1
A satellite pings your street with radar.
Every few days, a Sentinel-1 satellite passes 693 km overhead and times the echo from every rooftop and road.
2
Another orbit sees it from a different angle.
Satellites pass on rising and falling tracks. Two viewpoints separate up-and-down movement from sideways, the same trick astronomers use to measure the stars.
3
The echoes reveal millimetres.
Comparing hundreds of passes since 2020 shows changes smaller than a grain of rice, street by street.
4
Your home is compared with the ground around it.
Whole regions drift slowly together. We remove that shared movement, so what's left is what's happening to your home.

This is a real result.

S60 5ND, Rotherham. Since 2020 the ground here has risen about 3.1 mm a year relative to the area around it, more than 97% of the ground within 3 km.

Rising ground is a pattern seen across former coalfields, where water slowly returns to old mine workings. Your report shows the measurements and leaves the diagnosis to a surveyor.

Monthly measurements: 60
Street block: +3.4 mm/yr
Regional drift removed: −0.9 mm/yr

Worth checkingS60 5ND

Rising faster than the ground around it

+3.1mm/yr ± 1.0

Copernicus Sentinel-1 via EGMS 2020-2024. Each square is 100 m.

Most homes are steady.

We picked one random postcode in each of 20 very different parts of the UK, from London clay to Fenland peat, from former coalfields to Belfast. Every one was steady to within a millimetre a year.

NW3 6NRCamden
−0.1 ± 1.0
Steady
N1 3DJIslington
−0.2 ± 1.0
Steady
SE10 0JFGreenwich
−0.6 ± 1.0
Steady
W5 9SREaling
+0.1 ± 1.0
Steady
CO1 9ZEColchester
+0.3 ± 1.0
Steady
CB1 8PSCambridge
−0.3 ± 1.0
Steady
PE15 8PXFenland
+0.6 ± 1.0
Steady
NR30 3BUGreat Yarmouth
+0.4 ± 1.0
Steady
HU9 3SQKingston upon Hull, City of
−0.4 ± 1.0
Steady
DH3 1LJGateshead
−0.2 ± 1.0
Steady
S70 4REBarnsley
−0.8 ± 1.0
Steady
NG16 3RBBroxtowe
−0.2 ± 1.0
Steady
LS1 9GALeeds
+0.0 ± 1.0
Steady
M1 3WSManchester
+0.1 ± 1.0
Steady
B1 3JABirmingham
−0.1 ± 1.0
Steady
BS1 3JXBristol, City of
+0.1 ± 1.0
Steady
CF10 4PDCardiff
+0.0 ± 1.0
Steady
EH1 3SBCity of Edinburgh
+0.1 ± 1.0
Steady
G1 5EZGlasgow City
+0.1 ± 1.0
Steady
BT1 5HBBelfast
−0.2 ± 1.0
Steady

Some are not.

Our scan of these areas also found clusters moving faster than the ground around them. These are the cases a report exists for: worth knowing about, and worth a surveyor’s eye.

NG18 5NYMansfield
−35.4 ± 2.8
Worth checking
NG16 1ATBroxtowe
−6.8 ± 1.1
Worth checking
E16 1AFNewham
−1.8 ± 1.6
Slow movement
S60 5NDRotherham
+3.1 ± 1.0
Worth checking
WS11 5JTCannock Chase
+1.9 ± 1.0
Slow movement
NG2 1PLNottingham
+1.3 ± 1.0
Slow movement

Movement relative to ground 1–3 km around each postcode, Jan 2020 – Dec 2024, with 95% ranges. Copernicus Sentinel-1 via EGMS.

Know where you stand.

Prices at launch. Join the waitlist to be first in, with the full report at £19 for early members.

Check

Free

Steady, slow movement or worth checking, for any UK postcode
Every 100 m square around the postcode
A page you can share

Full report

£29 one-off

Five years of measurements, every six days
Neighbourhood map, seasonal swelling and coal mining records
Questions to ask, and a PDF for your surveyor

Professional

Pilot free for now

Check up to 200 postcodes at once
Reports with your firm's name on them
For surveyors, agents, conveyancers and insurers

See a sample report · Parallax for professionals

Questions, answered.

Is this a survey?

No. Parallax shows measured ground movement from satellites. It can't see cracks, drains or the condition of a building. A movement result is a reason to ask a surveyor, not a diagnosis.

How accurate is it?

Each result comes with a 95% range, usually about ±1 mm a year. We publish our full method and its limits, including what the satellites can't measure.

Is this my house?

Not exactly. We measure 100 m squares, and a postcode covers a handful of homes. So we show the square at your postcode's centre and every square within about 200 m, and tell you whether they agree. Your home is probably in one of them. Movement that changes over short distances matters more for buildings than a whole area moving together.

How is this different from a conveyancing ground search?

Conveyancing searches report what's on record, such as mining, geology and past claims. Parallax measures what the ground has actually done, every few days for five years. They work best together: we include coal mining records in the full report and suggest the questions to ask your conveyancer.

Where is the ground moving most?

Mostly over old coalfields, where ground still settles or rises as mine water returns, and on soft ground such as peat and some clays. See the national map and the fastest-moving places on Moving Britain.

How up to date is it?

Results cover January 2020 to December 2024, from the latest European Ground Motion Service release. New releases arrive about once a year.

What if there's no result for my postcode?

Radar needs stable surfaces like buildings and roads. Fields, woodland and water often have no reliable measurement, and we say so rather than guess. 99% of UK postcodes we tested had a result.

Who is behind Parallax?

An independent UK company using open data from the EU's Copernicus programme. We're not endorsed by the EU or any government body.

Be first to see your ground move.

Join the waitlist and we’ll email you when Parallax opens for your postcode, with the full report at the early price.

Is your ground moving?

Find out in a second. Free, for any UK postcode.