SE23 postcode area guide — Lewisham

Where is SE23?

Broadband & internet speeds in SE23

Excellent coverage

Broadband availability in the SE23 postcode district (Lewisham) is Excellent — gigabit-capable full fibre is widely available. Across the 606 postcodes Ofcom measures in SE23, superfast broadband (30 Mbit/s or faster) reaches 95.8% of premises and gigabit-capable lines are available to 86.3%.

Around 0% of premises in SE23 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 SE23

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

Mobile signal around Lewisham

Ofcom's coverage model for the wider Lewisham district (142,468 premises):

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

Crime in SE23

Police recorded 485 incidents within about a mile of the centre of SE23 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 SE23

Based on 328 sales registered with HM Land Registry in the last 12 months, the median sold price in SE23 is £500,000, up 4.2% on the previous year (£480,006).

Latest recorded sales in SE23

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

Who lives here? Lewisham demographics

Census 2021 figures for the wider Lewisham district (300,554 residents, 122,393 households):

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

Schools in and around SE23

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 SE23

199 rated food businesses operate in SE23. 98 hold the top rating of 5, 50 are rated 4, and 5 are rated 2 or below.

Among the 5-rated: Ama Sushi, Aspects - Food By Design, Aster House, Babur Brasserie Indian Restaurant, Babur Restaurant.

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

Energy performance (EPC) in SE23

From a sample of 265 Energy Performance Certificates across 12 SE23 postcodes, the most common rating is band D (average band D). 36% 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 Lewisham

Landlines around SE23 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 SE23?

Postcodes in SE23

Neighbouring districts

All South East London (SE) 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.