TS21 3 postcode sector in the TS21 district

TS21 3 is a sector of the TS21 district: every postcode that starts TS21 3. It has 150 postcodes in use, 3 of them large-user postcodes. A large-user postcode is one Royal Mail gives to a single address that gets a lot of mail.

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

Every postcode in the TS21 3 sector, by flood risk

Map of every postcode in the TS21 3 sector, by flood risk Of the 150 postcodes in the TS21 3 sector that ONS places, 1 are at medium risk at worst, 3 are at low risk at worst and 146 are not on the Environment Agency's at-risk list. Places named: Sedgefield, Wynyard. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A177 TS21 3AA: not on the flood risk listTS21 3AB: not on the flood risk listTS21 3AD: not on the flood risk listTS21 3AE: not on the flood risk listTS21 3AF: not on the flood risk listTS21 3AG: not on the flood risk listTS21 3AH: not on the flood risk listTS21 3AJ: not on the flood risk listTS21 3AL: not on the flood risk listTS21 3AN: not on the flood risk listTS21 3AP: not on the flood risk listTS21 3AQ: not on the flood risk listTS21 3AR: not on the flood risk listTS21 3AT: not on the flood risk listTS21 3AU: not on the flood risk listTS21 3AX: not on the flood risk listTS21 3AY: not on the flood risk listTS21 3AZ: not on the flood risk listTS21 3BD: not on the flood risk listTS21 3BE: not on the flood risk listTS21 3BF: not on the flood risk listTS21 3BG: not on the flood risk listTS21 3BH: not on the flood risk listTS21 3BJ: not on the flood risk listTS21 3BL: not on the flood risk listTS21 3BN: not on the flood risk listTS21 3BP: not on the flood risk listTS21 3BQ: not on the flood risk listTS21 3BS: not on the flood risk listTS21 3BT: not on the flood risk listTS21 3BU: not on the flood risk listTS21 3BX: not on the flood risk listTS21 3BY: not on the flood risk listTS21 3BZ: not on the flood risk listTS21 3DA: not on the flood risk listTS21 3DB: not on the flood risk listTS21 3DD: not on the flood risk listTS21 3DE: not on the flood risk listTS21 3DG: not on the flood risk listTS21 3DH: not on the flood risk listTS21 3DJ: not on the flood risk listTS21 3DL: not on the flood risk listTS21 3DQ: not on the flood risk listTS21 3DS: not on the flood risk listTS21 3DT: not on the flood risk listTS21 3DU: not on the flood risk listTS21 3DW: not on the flood risk listTS21 3DY: not on the flood risk listTS21 3DZ: not on the flood risk listTS21 3ED: not on the flood risk listTS21 3EE: not on the flood risk listTS21 3EF: not on the flood risk listTS21 3EG: not on the flood risk listTS21 3EL: not on the flood risk listTS21 3EN: not on the flood risk listTS21 3EP: not on the flood risk listTS21 3EQ: not on the flood risk listTS21 3ER: not on the flood risk listTS21 3ET: not on the flood risk listTS21 3EU: not on the flood risk listTS21 3EW: not on the flood risk listTS21 3EX: not on the flood risk listTS21 3FA: not on the flood risk listTS21 3FB: not on the flood risk listTS21 3FD: not on the flood risk listTS21 3FE: not on the flood risk listTS21 3FF: not on the flood risk listTS21 3FG: not on the flood risk listTS21 3FH: not on the flood risk listTS21 3FJ: not on the flood risk listTS21 3FL: not on the flood risk listTS21 3FN: not on the flood risk listTS21 3FP: not on the flood risk listTS21 3FQ: not on the flood risk listTS21 3FR: not on the flood risk listTS21 3HA: not on the flood risk listTS21 3HD: not on the flood risk listTS21 3HE: not on the flood risk listTS21 3HF: not on the flood risk listTS21 3HG: not on the flood risk listTS21 3HH: not on the flood risk listTS21 3HL: not on the flood risk listTS21 3HN: not on the flood risk listTS21 3HP: not on the flood risk listTS21 3HQ: not on the flood risk listTS21 3HS: not on the flood risk listTS21 3HT: not on the flood risk listTS21 3HW: not on the flood risk listTS21 3HX: not on the flood risk listTS21 3HY: not on the flood risk listTS21 3HZ: not on the flood risk listTS21 3JA: not on the flood risk listTS21 3JB: not on the flood risk listTS21 3JE: not on the flood risk listTS21 3JF: not on the flood risk listTS21 3JG: not on the flood risk listTS21 3JH: not on the flood risk listTS21 3JJ: not on the flood risk listTS21 3JL: not on the flood risk listTS21 3JN: not on the flood risk listTS21 3JP: not on the flood risk listTS21 3JQ: not on the flood risk listTS21 3JT: not on the flood risk listTS21 3JU: not on the flood risk listTS21 3JX: not on the flood risk listTS21 3JY: not on the flood risk listTS21 3LA: not on the flood risk listTS21 3LD: not on the flood risk listTS21 3LE: not on the flood risk listTS21 3LF: not on the flood risk listTS21 3LH: not on the flood risk listTS21 3LL: not on the flood risk listTS21 3LN: not on the flood risk listTS21 3LQ: not on the flood risk listTS21 3LR: not on the flood risk listTS21 3LS: not on the flood risk listTS21 3LT: not on the flood risk listTS21 3LU: not on the flood risk listTS21 3LX: not on the flood risk listTS21 3LY: not on the flood risk listTS21 3LZ: not on the flood risk listTS21 3NA: not on the flood risk listTS21 3NB: not on the flood risk listTS21 3NH: not on the flood risk listTS21 3NJ: not on the flood risk listTS21 3NL: not on the flood risk listTS21 3NN: not on the flood risk listTS21 3NP: not on the flood risk listTS21 3NR: not on the flood risk listTS21 3NS: not on the flood risk listTS21 3NT: not on the flood risk listTS21 3NU: not on the flood risk listTS21 3NX: not on the flood risk listTS21 3HR: low flood risk at worstTS21 3JR: low flood risk at worstTS21 3LJ: low flood risk at worstTS21 3LB: medium flood risk at worst SedgefieldWynyard Map of every postcode in the TS21 3 sector, by flood risk Of the 150 postcodes in the TS21 3 sector that ONS places, 1 are at medium risk at worst, 3 are at low risk at worst and 146 are not on the Environment Agency's at-risk list. Places named: Sedgefield, Wynyard. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. SedgefieldWynyard
  • A home or business at high risk: 0
  • At medium risk at worst: 1
  • At low risk at worst: 3
  • At very low risk only: 0
  • Not on the at-risk list: 146

Of the 150 postcodes in the TS21 3 sector that ONS places, 1 are at medium risk at worst, 3 are at low risk at worst and 146 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.

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 medium risk at worst

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

TS21 3LB3 at medium risk

What do homes sell for in TS21 3?

Homes in TS21 3 sold for a typical £203,050 in the 12 months to August 2026, across 60 sales, up 11% on the 12 months before, HM Land Registry's figures show.

£203,050 typical price, the 12 months to August 2026
£183,000 12 months to August 2025
▲ up 11% on the 12 months before
  • Detached £340,000 19 sales
  • Semi-detached £180,000 17 sales
  • Terraced £167,500 16 sales
  • Flat or maisonette £72,725 8 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 TS21 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 TS21 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.

TS21 3AATS21 3ABTS21 3ADTS21 3AETS21 3AFTS21 3AGTS21 3AHTS21 3AJTS21 3ALTS21 3ANTS21 3APTS21 3AQTS21 3ARTS21 3ASTS21 3ATTS21 3AUTS21 3AWTS21 3AXTS21 3AYTS21 3AZTS21 3BATS21 3BBTS21 3BDTS21 3BETS21 3BFTS21 3BGTS21 3BHTS21 3BJTS21 3BLTS21 3BNTS21 3BPTS21 3BQTS21 3BSTS21 3BTTS21 3BUTS21 3BWTS21 3BXTS21 3BYTS21 3BZTS21 3DATS21 3DBTS21 3DDTS21 3DETS21 3DFTS21 3DGTS21 3DHTS21 3DJTS21 3DLTS21 3DNTS21 3DQTS21 3DSTS21 3DTTS21 3DUTS21 3DWTS21 3DYTS21 3DZTS21 3EDTS21 3EETS21 3EFTS21 3EGTS21 3EHTS21 3ELTS21 3ENTS21 3EPTS21 3EQTS21 3ERTS21 3ETTS21 3EUTS21 3EWTS21 3EXTS21 3FATS21 3FBTS21 3FDTS21 3FETS21 3FFTS21 3FGTS21 3FHTS21 3FJTS21 3FLTS21 3FNTS21 3FPTS21 3FQTS21 3FRTS21 3HATS21 3HDTS21 3HETS21 3HFTS21 3HGTS21 3HHTS21 3HLTS21 3HNTS21 3HPTS21 3HQTS21 3HRTS21 3HSTS21 3HTTS21 3HWTS21 3HXTS21 3HYTS21 3HZTS21 3JATS21 3JBTS21 3JDTS21 3JETS21 3JFTS21 3JGTS21 3JHTS21 3JJTS21 3JLTS21 3JNTS21 3JPTS21 3JQTS21 3JRTS21 3JSTS21 3JTTS21 3JUTS21 3JWTS21 3JXTS21 3JYTS21 3JZTS21 3LATS21 3LBTS21 3LDTS21 3LETS21 3LFTS21 3LHTS21 3LJTS21 3LLTS21 3LNTS21 3LQTS21 3LRTS21 3LSTS21 3LTTS21 3LUTS21 3LXTS21 3LYTS21 3LZTS21 3NATS21 3NBTS21 3NHTS21 3NJTS21 3NLTS21 3NNTS21 3NPTS21 3NRTS21 3NSTS21 3NTTS21 3NUTS21 3NWTS21 3NX

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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