SM4 postcode area guide — Merton

Where is SM4?

Broadband & internet speeds in SM4

Excellent coverage

Broadband availability in the SM4 postcode district (Merton) is Excellent — gigabit-capable full fibre is widely available. Across the 552 postcodes Ofcom measures in SM4, superfast broadband (30 Mbit/s or faster) reaches 99.4% of premises and gigabit-capable lines are available to 94.7%.

Around 0% of premises in SM4 fall below the Universal Service Obligation (a minimum of 10 Mbit/s download and 1 Mbit/s upload), so the overwhelming majority of homes and businesses here can already order a decent fixed line. For a business that depends on its connection, the figures that matter most are gigabit and full-fibre availability — the symmetric, low-contention services we quote leased lines and FTTP against.

Sample postcodes in SM4

Run a speed test to see what you're actually getting, or check your exact postcode.

Mobile signal around Merton

Ofcom's coverage model for the wider Merton district (92,149 premises):

Signal varies street by street — use the mobile coverage checker to compare EE, O2, Three and Vodafone at an exact postcode.

Crime in SM4

Police recorded 264 incidents within about a mile of the centre of SM4 in May 2026 (latest published street-level data). The breakdown:

Raw counts favour busy town centres — a high street with shops and nightlife records more incidents than a residential cul-de-sac. Source: police.uk open data (point sample around the district centroid).

House prices in SM4

Based on 238 sales registered with HM Land Registry in the last 12 months, the median sold price in SM4 is £475,000, down 5.9% on the previous year (£505,000).

Latest recorded sales in SM4

Contains HM Land Registry data © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.

Who lives here? Merton demographics

Census 2021 figures for the wider Merton district (215,186 residents, 81,726 households):

Source: ONS Census 2021 (district level — the finest openly licensed cut we republish). © Crown copyright, OGL v3.0.

Schools in and around SM4

Source: DfE Get Information about Schools (England & Wales). Check Ofsted report cards for inspection detail — headline one-word grades were retired in 2024.

Food hygiene ratings in SM4

183 rated food businesses operate in SM4. 124 hold the top rating of 5, 26 are rated 4, and 2 are rated 2 or below.

Among the 5-rated: 40 Cakes, Abbey House Residential Home, Achieve Together, Annex Abbey House, Asilia Limited.

Source: Food Standards Agency, food hygiene ratings (FHRS) open data.

Energy performance (EPC) in SM4

From a sample of 274 Energy Performance Certificates across 10 SM4 postcodes, the most common rating is band D (average band D). 35% of sampled homes are rated C or better.

Source: MHCLG Energy Performance of Buildings Data (England & Wales), sampled at postcode level and refreshed monthly. Individual certificates are on each postcode’s page.

Phone area codes for Merton

Landlines around SM4 typically use:

Had a call from an unknown number? Use our free UK phone number checker to see who called.

What's it like living in SM4?

Postcodes in SM4

Neighbouring districts

All Sutton (SM) postcode districts ›

Frequently asked questions

Sources: HM Land Registry Price Paid Data, police.uk street-level crime, Ofcom Connected Nations, ONS Census 2021, DfE Get Information about Schools, Food Standards Agency FHRS — all © Crown copyright, licensed under the Open Government Licence v3.0. Figures are area aggregates; individual addresses vary. Energy performance (EPC) data will be added when our Open Data Communities registration is approved.