SE21 postcode district: Southwark and around

SE21 is a postcode district in England, with 296 postcodes in use in 3 sectors. It has postcodes in Southwark and Lambeth. It is split between 2 councils: Southwark (181 postcodes) and Lambeth (115).

Postcodes in use
296
Sectors
3
Councils
2 councils
Places
2 places

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in SE21, by flood risk

Map of every postcode in SE21, by flood risk Of the 296 postcodes in SE21 that ONS places, 296 are not on the Environment Agency's at-risk list. Places named: Dulwich Wood, West Dulwich. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A205 SE21 7AA: not on the flood risk listSE21 7AB: not on the flood risk listSE21 7AD: not on the flood risk listSE21 7AE: not on the flood risk listSE21 7AF: not on the flood risk listSE21 7AG: not on the flood risk listSE21 7AJ: not on the flood risk listSE21 7AL: not on the flood risk listSE21 7AN: not on the flood risk listSE21 7AP: not on the flood risk listSE21 7AQ: not on the flood risk listSE21 7AR: not on the flood risk listSE21 7AS: not on the flood risk listSE21 7AU: not on the flood risk listSE21 7AW: not on the flood risk listSE21 7BA: not on the flood risk listSE21 7BB: not on the flood risk listSE21 7BD: not on the flood risk listSE21 7BE: not on the flood risk listSE21 7BG: not on the flood risk listSE21 7BH: not on the flood risk listSE21 7BJ: not on the flood risk listSE21 7BN: not on the flood risk listSE21 7BP: not on the flood risk listSE21 7BQ: not on the flood risk listSE21 7BS: not on the flood risk listSE21 7BT: not on the flood risk listSE21 7BU: not on the flood risk listSE21 7BX: not on the flood risk listSE21 7DE: not on the flood risk listSE21 7DF: not on the flood risk listSE21 7DG: not on the flood risk listSE21 7DH: not on the flood risk listSE21 7DJ: not on the flood risk listSE21 7DL: not on the flood risk listSE21 7DN: not on the flood risk listSE21 7DP: not on the flood risk listSE21 7DQ: not on the flood risk listSE21 7DR: not on the flood risk listSE21 7DW: not on the flood risk listSE21 7DZ: not on the flood risk listSE21 7EA: not on the flood risk listSE21 7EB: not on the flood risk listSE21 7ED: not on the flood risk listSE21 7EE: not on the flood risk listSE21 7EF: not on the flood risk listSE21 7EG: not on the flood risk listSE21 7EP: not on the flood risk listSE21 7ER: not on the flood risk listSE21 7ES: not on the flood risk listSE21 7ET: not on the flood risk listSE21 7EU: not on the flood risk listSE21 7EW: not on the flood risk listSE21 7EX: not on the flood risk listSE21 7EY: not on the flood risk listSE21 7EZ: not on the flood risk listSE21 7HA: not on the flood risk listSE21 7HH: not on the flood risk listSE21 7HJ: not on the flood risk listSE21 7HL: not on the flood risk listSE21 7HN: not on the flood risk listSE21 7HP: not on the flood risk listSE21 7HR: not on the flood risk listSE21 7HW: not on the flood risk listSE21 7JA: not on the flood risk listSE21 7JB: not on the flood risk listSE21 7JH: not on the flood risk listSE21 7JJ: not on the flood risk listSE21 7JL: not on the flood risk listSE21 7JN: not on the flood risk listSE21 7JP: not on the flood risk listSE21 7JR: not on the flood risk listSE21 7JS: not on the flood risk listSE21 7JT: not on the flood risk listSE21 7JU: not on the flood risk listSE21 7JW: not on the flood risk listSE21 7JZ: not on the flood risk listSE21 7LD: not on the flood risk listSE21 7LE: not on the flood risk listSE21 7LF: not on the flood risk listSE21 7LG: not on the flood risk listSE21 7LH: not on the flood risk listSE21 7LJ: not on the flood risk listSE21 7LS: not on the flood risk listSE21 7LT: not on the flood risk listSE21 7LU: not on the flood risk listSE21 7LX: not on the flood risk listSE21 7LY: not on the flood risk listSE21 7LZ: not on the flood risk listSE21 7NA: not on the flood risk listSE21 7NB: not on the flood risk listSE21 7ND: not on the flood risk listSE21 8AA: not on the flood risk listSE21 8AB: not on the flood risk listSE21 8AD: not on the flood risk listSE21 8AE: not on the flood risk listSE21 8AF: not on the flood risk listSE21 8AG: not on the flood risk listSE21 8AH: not on the flood risk listSE21 8AL: not on the flood risk listSE21 8AQ: not on the flood risk listSE21 8AR: not on the flood risk listSE21 8AS: not on the flood risk listSE21 8AT: not on the flood risk listSE21 8AU: not on the flood risk listSE21 8AX: not on the flood risk listSE21 8AY: not on the flood risk listSE21 8AZ: not on the flood risk listSE21 8BA: not on the flood risk listSE21 8BB: not on the flood risk listSE21 8BD: not on the flood risk listSE21 8BE: not on the flood risk listSE21 8BG: not on the flood risk listSE21 8BJ: not on the flood risk listSE21 8BN: not on the flood risk listSE21 8BP: not on the flood risk listSE21 8BS: not on the flood risk listSE21 8BT: not on the flood risk listSE21 8BU: not on the flood risk listSE21 8BW: not on the flood risk listSE21 8BX: not on the flood risk listSE21 8BY: not on the flood risk listSE21 8BZ: not on the flood risk listSE21 8DA: not on the flood risk listSE21 8DB: not on the flood risk listSE21 8DE: not on the flood risk listSE21 8DF: not on the flood risk listSE21 8DG: not on the flood risk listSE21 8DJ: not on the flood risk listSE21 8DP: not on the flood risk listSE21 8DR: not on the flood risk listSE21 8DS: not on the flood risk listSE21 8DT: not on the flood risk listSE21 8DU: not on the flood risk listSE21 8DW: not on the flood risk listSE21 8DX: not on the flood risk listSE21 8DY: not on the flood risk listSE21 8DZ: not on the flood risk listSE21 8EA: not on the flood risk listSE21 8EB: not on the flood risk listSE21 8ED: not on the flood risk listSE21 8EE: not on the flood risk listSE21 8EG: not on the flood risk listSE21 8EH: not on the flood risk listSE21 8EN: not on the flood risk listSE21 8EQ: not on the flood risk listSE21 8ER: not on the flood risk listSE21 8ES: not on the flood risk listSE21 8EU: not on the flood risk listSE21 8EX: not on the flood risk listSE21 8EZ: not on the flood risk listSE21 8GA: not on the flood risk listSE21 8HA: not on the flood risk listSE21 8HB: not on the flood risk listSE21 8HD: not on the flood risk listSE21 8HE: not on the flood risk listSE21 8HG: not on the flood risk listSE21 8HJ: not on the flood risk listSE21 8HN: not on the flood risk listSE21 8HP: not on the flood risk listSE21 8HS: not on the flood risk listSE21 8HT: not on the flood risk listSE21 8HU: not on the flood risk listSE21 8HW: not on the flood risk listSE21 8HX: not on the flood risk listSE21 8HY: not on the flood risk listSE21 8HZ: not on the flood risk listSE21 8JA: not on the flood risk listSE21 8JB: not on the flood risk listSE21 8JD: not on the flood risk listSE21 8JF: not on the flood risk listSE21 8JH: not on the flood risk listSE21 8JJ: not on the flood risk listSE21 8JL: not on the flood risk listSE21 8JN: not on the flood risk listSE21 8JP: not on the flood risk listSE21 8JR: not on the flood risk listSE21 8JS: not on the flood risk listSE21 8JU: not on the flood risk listSE21 8JW: not on the flood risk listSE21 8JX: not on the flood risk listSE21 8JY: not on the flood risk listSE21 8JZ: not on the flood risk listSE21 8LA: not on the flood risk listSE21 8LB: not on the flood risk listSE21 8LD: not on the flood risk listSE21 8LE: not on the flood risk listSE21 8LF: not on the flood risk listSE21 8LG: not on the flood risk listSE21 8LH: not on the flood risk listSE21 8LJ: not on the flood risk listSE21 8LL: not on the flood risk listSE21 8LN: not on the flood risk listSE21 8LP: not on the flood risk listSE21 8LQ: not on the flood risk listSE21 8LR: not on the flood risk listSE21 8LS: not on the flood risk listSE21 8LT: not on the flood risk listSE21 8LU: not on the flood risk listSE21 8LW: not on the flood risk listSE21 8LX: not on the flood risk listSE21 8LY: not on the flood risk listSE21 8LZ: not on the flood risk listSE21 8NA: not on the flood risk listSE21 8NF: not on the flood risk listSE21 8NG: not on the flood risk listSE21 8NH: not on the flood risk listSE21 8NJ: not on the flood risk listSE21 8NL: not on the flood risk listSE21 8NN: not on the flood risk listSE21 8NP: not on the flood risk listSE21 8NQ: not on the flood risk listSE21 8NR: not on the flood risk listSE21 8NS: not on the flood risk listSE21 8NT: not on the flood risk listSE21 8NU: not on the flood risk listSE21 8NW: not on the flood risk listSE21 8NX: not on the flood risk listSE21 8NY: not on the flood risk listSE21 8NZ: not on the flood risk listSE21 8PA: not on the flood risk listSE21 8PB: not on the flood risk listSE21 8PD: not on the flood risk listSE21 8PE: not on the flood risk listSE21 8PF: not on the flood risk listSE21 8PG: not on the flood risk listSE21 8PH: not on the flood risk listSE21 8PJ: not on the flood risk listSE21 8PL: not on the flood risk listSE21 8PN: not on the flood risk listSE21 8PQ: not on the flood risk listSE21 8PU: not on the flood risk listSE21 8PX: not on the flood risk listSE21 8PY: not on the flood risk listSE21 8PZ: not on the flood risk listSE21 8QA: not on the flood risk listSE21 8QB: not on the flood risk listSE21 8QD: not on the flood risk listSE21 8QE: not on the flood risk listSE21 8QF: not on the flood risk listSE21 8QG: not on the flood risk listSE21 8QJ: not on the flood risk listSE21 8QL: not on the flood risk listSE21 8QN: not on the flood risk listSE21 8QP: not on the flood risk listSE21 8QQ: not on the flood risk listSE21 8QR: not on the flood risk listSE21 8QS: not on the flood risk listSE21 8QW: not on the flood risk listSE21 8RA: not on the flood risk listSE21 8RB: not on the flood risk listSE21 8RD: not on the flood risk listSE21 8RE: not on the flood risk listSE21 8RF: not on the flood risk listSE21 8RG: not on the flood risk listSE21 8RH: not on the flood risk listSE21 8RJ: not on the flood risk listSE21 8RL: not on the flood risk listSE21 8RN: not on the flood risk listSE21 8RP: not on the flood risk listSE21 8RQ: not on the flood risk listSE21 8RR: not on the flood risk listSE21 8RS: not on the flood risk listSE21 8RW: not on the flood risk listSE21 8SB: not on the flood risk listSE21 8SD: not on the flood risk listSE21 8SE: not on the flood risk listSE21 8SF: not on the flood risk listSE21 8SG: not on the flood risk listSE21 8SL: not on the flood risk listSE21 8SN: not on the flood risk listSE21 8SQ: not on the flood risk listSE21 8SR: not on the flood risk listSE21 8SS: not on the flood risk listSE21 8SW: not on the flood risk listSE21 8SX: not on the flood risk listSE21 8SY: not on the flood risk listSE21 8SZ: not on the flood risk list Dulwich WoodWest Dulwich Map of every postcode in SE21, by flood risk Of the 296 postcodes in SE21 that ONS places, 296 are not on the Environment Agency's at-risk list. Places named: Dulwich Wood, West Dulwich. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A2216 Dulwich WoodWest Dulwich
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 296

Of the 296 postcodes in SE21 that ONS places, 296 are not on the Environment Agency's at-risk list.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode. Names in italics are council wards: we hold no town or village names here.

The middle of its postcodes: latitude 51.4390, longitude -0.0887. Open this area on OpenStreetMap

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

What broadband can you get in SE21?

Ofcom reports on 281 of the 296 postcodes in SE21. At 207 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit207 of 281
Postcodes where every home can get superfast264 of 281

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

Is SE21 at risk of flooding?

None of the 296 postcodes in SE21 is on the Environment Agency's list of postcodes with a home or business in an area at risk of flooding from rivers or the sea.

Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.

Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it

What do homes sell for in SE21?

Homes in SE21 sold for a typical £730,000 in the 12 months to August 2026, across 128 sales, down 0.7% on the 12 months before, HM Land Registry's figures show.

£730,000 typical price, the 12 months to August 2026
£735,000 12 months to August 2025
▼ down 0.7% on the 12 months before
  • Detached £2,150,000 5 sales
  • Semi-detached £1,375,000 30 sales
  • Terraced £902,500 36 sales
  • Flat or maisonette £405,000 57 sales

Each bar is that kind's typical price, against the most expensive kind here.

Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.

Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it

Postcodes in SE21

Pick a sector, then a postcode. A sector is the district plus the next digit.

SE21 792 postcodesSE21 8191 postcodesSE21 913 postcodes
UK postcode format explained

Places in SE21

Towns and villages with postcodes in SE21, and how many each has here.

Southwark postcodes,182Lambeth postcodes,112

Who covers SE21

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • Dulwich and West Norwood296

Police force areas

  • Metropolitan Police296

Next to SE21

SE20 postcode district SE22 postcode district All SE districts Southwark postcodes

"Next to" is by number: the districts before and after SE21 in the SE area.

Check a postcode

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