S21 3 postcode sector in the S21 district

S21 3 is a sector of the S21 district: every postcode that starts S21 3. It has 55 postcodes in use.

Not sure what a sector is? UK postcode format explained.

Every postcode in the S21 3 sector, by flood risk

Map of every postcode in the S21 3 sector, by flood risk Of the 55 postcodes in the S21 3 sector that ONS places, 5 have a home or business at high risk, 2 are at medium risk at worst, 1 are at low risk at worst and 47 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: Eckington South & Renishaw, Barlborough. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A6135 S21 3TE: not on the flood risk listS21 3TF: not on the flood risk listS21 3UA: not on the flood risk listS21 3UB: not on the flood risk listS21 3UD: not on the flood risk listS21 3UE: not on the flood risk listS21 3UF: not on the flood risk listS21 3UG: not on the flood risk listS21 3UH: not on the flood risk listS21 3UJ: not on the flood risk listS21 3UN: not on the flood risk listS21 3UP: not on the flood risk listS21 3UQ: not on the flood risk listS21 3UR: not on the flood risk listS21 3US: not on the flood risk listS21 3UT: not on the flood risk listS21 3UU: not on the flood risk listS21 3UW: not on the flood risk listS21 3UY: not on the flood risk listS21 3WA: not on the flood risk listS21 3WD: not on the flood risk listS21 3WE: not on the flood risk listS21 3WF: not on the flood risk listS21 3WG: not on the flood risk listS21 3WH: not on the flood risk listS21 3WJ: not on the flood risk listS21 3WL: not on the flood risk listS21 3WN: not on the flood risk listS21 3WP: not on the flood risk listS21 3WQ: not on the flood risk listS21 3WR: not on the flood risk listS21 3WS: not on the flood risk listS21 3WT: not on the flood risk listS21 3WU: not on the flood risk listS21 3WW: not on the flood risk listS21 3WX: not on the flood risk listS21 3WY: not on the flood risk listS21 3YA: not on the flood risk listS21 3YB: not on the flood risk listS21 3YD: not on the flood risk listS21 3YE: not on the flood risk listS21 3YF: not on the flood risk listS21 3YG: not on the flood risk listS21 3YH: not on the flood risk listS21 3YL: not on the flood risk listS21 3YN: not on the flood risk listS21 3YQ: not on the flood risk listS21 3TZ: low flood risk at worstS21 3TX: medium flood risk at worstS21 3UZ: medium flood risk at worstS21 3JS: high flood riskS21 3TY: high flood riskS21 3UL: high flood riskS21 3UX: high flood riskS21 3WB: high flood risk Eckington South & RenishawBarlborough 5 postcodes at high or medium risk, outlined: this goes to S21 3UL, the one with most homes and businesses at high risk5 postcodes at high or medium risk Map of every postcode in the S21 3 sector, by flood risk Of the 55 postcodes in the S21 3 sector that ONS places, 5 have a home or business at high risk, 2 are at medium risk at worst, 1 are at low risk at worst and 47 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: Eckington South & Renishaw, Barlborough. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Eckington South & RenishawBarlborough
  • A home or business at high risk: 5
  • At medium risk at worst: 2
  • At low risk at worst: 1
  • At very low risk only: 0
  • Not on the at-risk list: 47
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 55 postcodes in the S21 3 sector that ONS places, 5 have a home or business at high risk, 2 are at medium risk at worst, 1 are at low risk at worst and 47 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. A dashed outline shows where 5 or more lie within 210 metres of each other. It is not a boundary, and no boundary is drawn. Names in italics are council wards: we hold no town or village names here.

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

The postcodes at high risk

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

S21 3UL7 at high riskS21 3JS6 at high riskS21 3TY5 at high riskS21 3UX3 at high riskS21 3WB2 at high risk

Where the postcodes at high or medium risk lie together

  • 5 postcodes at high or medium risk, outlined on the map. S21 3UL, is the one with most homes and businesses at high risk.

What do homes sell for in S21 3?

Homes in S21 3 sold for a typical £160,000 in the 12 months to August 2026, across 37 sales, down 6.4% on the 12 months before, HM Land Registry's figures show.

£160,000 typical price, the 12 months to August 2026
£171,000 12 months to August 2025
▼ down 6.4% on the 12 months before
  • Detached £300,000 7 sales
  • Semi-detached £167,000 15 sales
  • Terraced £161,000 6 sales
  • Flat or maisonette £110,000 9 sales

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

Standard sales of homes at market value at the postcodes that start S21 3. A typical price is the median, the middle sale, given from 5 sales or more.

How we work this out: house prices by postcode

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 S21 3

Pick a postcode to see its council and MP, broadband, flood risk, what homes sell for, council tax, the nearest schools and stations, and crime around it.

S21 3JSS21 3TES21 3TFS21 3TXS21 3TYS21 3TZS21 3UAS21 3UBS21 3UDS21 3UES21 3UFS21 3UGS21 3UHS21 3UJS21 3ULS21 3UNS21 3UPS21 3UQS21 3URS21 3USS21 3UTS21 3UUS21 3UWS21 3UXS21 3UYS21 3UZS21 3WAS21 3WBS21 3WDS21 3WES21 3WFS21 3WGS21 3WHS21 3WJS21 3WLS21 3WNS21 3WPS21 3WQS21 3WRS21 3WSS21 3WTS21 3WUS21 3WWS21 3WXS21 3WYS21 3YAS21 3YBS21 3YDS21 3YES21 3YFS21 3YGS21 3YHS21 3YLS21 3YNS21 3YQ

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed. See all our data sources

What council am I in? The council, borough or local authority for a postcode, and the county council where there is one. What ward am I in? The ward for a postcode, with its council, constituency and parish.

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