← SM4 area guide Side by side

SM4 or SW20?

Two neighbouring postcode districts compared on sold prices, energy, flood risk, crime and deprivation, all from the same official sources as every report on this site.

The short version
SM4
Merton
SW20
Merton
Median home sale nearby £420,000
from 77 sales
£730,000
from 158 sales
Average sold price £239,697 £237,836
Area price growth (YoY) +0.5% (Merton) +0.5% (Merton)
Dwelling type Mid-terrace house Top-floor flat
Floor area 100 m² 55 m²
Built 1900–1929 1930–1949
Energy rating C D
Heating cost (EPC est.) £775/yr £1239/yr
Flood zone Zone 1 (low probability) Zone 1 (low probability)
Crime nearby 274 recorded 190 recorded
Deprivation decile 6 of 10 6 of 10

Common questions

Is SM4 or SW20 cheaper?

SM4 is the cheaper of the two. Homes around SM4 sell for about £420,000 and around SW20 for about £730,000, from HM Land Registry records of what actually changed hands.

Which has less crime, SM4 or SW20?

SW20 recorded fewer crimes in the same period (274 in SM4 against 190 in SW20, Police.uk). Busier places record more, so read this alongside how built-up each area is rather than on its own.

Is SM4 or SW20 the more affluent area?

On the Index of Multiple Deprivation, SM4 sits in decile 6 of 10 and SW20 in decile 6, where 10 is the least deprived.

Should I buy in SM4 or SW20?

That depends on what you need, and no dataset answers it. What this page gives you is the evidence side by side: what homes actually sell for, the energy ratings, the flood zone, recorded crime and deprivation, each traced to the body that published it.

A quick side-by-side snapshot only. Open each property's full report for the complete picture.