TN21 9 postcode sector in the TN21 district

TN21 9 is a sector of the TN21 district: every postcode that starts TN21 9. It has 173 postcodes in use, one of them a large-user postcode. 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 TN21 9 sector, by flood risk

Map of every postcode in the TN21 9 sector, by flood risk Of the 173 postcodes in the TN21 9 sector that ONS places, 2 have a home or business at high risk, 5 are at low risk at worst and 166 are not on the Environment Agency's at-risk list. Places named: Heathfield. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. TN21 9AA: not on the flood risk listTN21 9AB: not on the flood risk listTN21 9AD: not on the flood risk listTN21 9AE: not on the flood risk listTN21 9AG: not on the flood risk listTN21 9AH: not on the flood risk listTN21 9AJ: not on the flood risk listTN21 9AL: not on the flood risk listTN21 9AN: not on the flood risk listTN21 9AS: not on the flood risk listTN21 9AT: not on the flood risk listTN21 9AU: not on the flood risk listTN21 9AX: not on the flood risk listTN21 9AY: not on the flood risk listTN21 9AZ: not on the flood risk listTN21 9BA: not on the flood risk listTN21 9BB: not on the flood risk listTN21 9BD: not on the flood risk listTN21 9BE: not on the flood risk listTN21 9BF: not on the flood risk listTN21 9BG: not on the flood risk listTN21 9BH: not on the flood risk listTN21 9BJ: not on the flood risk listTN21 9BL: not on the flood risk listTN21 9BN: not on the flood risk listTN21 9BP: not on the flood risk listTN21 9BS: not on the flood risk listTN21 9BT: not on the flood risk listTN21 9BU: not on the flood risk listTN21 9BX: not on the flood risk listTN21 9BY: not on the flood risk listTN21 9DA: not on the flood risk listTN21 9DB: not on the flood risk listTN21 9DD: not on the flood risk listTN21 9DE: not on the flood risk listTN21 9DF: not on the flood risk listTN21 9DG: not on the flood risk listTN21 9DH: not on the flood risk listTN21 9DJ: not on the flood risk listTN21 9DL: not on the flood risk listTN21 9DN: not on the flood risk listTN21 9DP: not on the flood risk listTN21 9DQ: not on the flood risk listTN21 9DR: not on the flood risk listTN21 9DS: not on the flood risk listTN21 9DT: not on the flood risk listTN21 9DU: not on the flood risk listTN21 9DZ: not on the flood risk listTN21 9EA: not on the flood risk listTN21 9EB: not on the flood risk listTN21 9EE: not on the flood risk listTN21 9EF: not on the flood risk listTN21 9EG: not on the flood risk listTN21 9EH: not on the flood risk listTN21 9EN: not on the flood risk listTN21 9EP: not on the flood risk listTN21 9EQ: not on the flood risk listTN21 9ER: not on the flood risk listTN21 9ES: not on the flood risk listTN21 9EU: not on the flood risk listTN21 9EW: not on the flood risk listTN21 9EX: not on the flood risk listTN21 9EY: not on the flood risk listTN21 9HA: not on the flood risk listTN21 9HD: not on the flood risk listTN21 9HE: not on the flood risk listTN21 9HF: not on the flood risk listTN21 9HG: not on the flood risk listTN21 9HH: not on the flood risk listTN21 9HJ: not on the flood risk listTN21 9HN: not on the flood risk listTN21 9HP: not on the flood risk listTN21 9HQ: not on the flood risk listTN21 9HT: not on the flood risk listTN21 9HU: not on the flood risk listTN21 9HX: not on the flood risk listTN21 9JA: not on the flood risk listTN21 9JB: not on the flood risk listTN21 9JD: not on the flood risk listTN21 9JE: not on the flood risk listTN21 9JH: not on the flood risk listTN21 9JL: not on the flood risk listTN21 9JN: not on the flood risk listTN21 9JP: not on the flood risk listTN21 9JR: not on the flood risk listTN21 9JS: not on the flood risk listTN21 9JU: not on the flood risk listTN21 9JX: not on the flood risk listTN21 9LA: not on the flood risk listTN21 9LB: not on the flood risk listTN21 9LD: not on the flood risk listTN21 9LE: not on the flood risk listTN21 9LF: not on the flood risk listTN21 9LG: not on the flood risk listTN21 9LH: not on the flood risk listTN21 9LJ: not on the flood risk listTN21 9LL: not on the flood risk listTN21 9LN: not on the flood risk listTN21 9LP: not on the flood risk listTN21 9LQ: not on the flood risk listTN21 9LR: not on the flood risk listTN21 9LS: not on the flood risk listTN21 9LT: not on the flood risk listTN21 9LX: not on the flood risk listTN21 9LY: not on the flood risk listTN21 9NA: not on the flood risk listTN21 9NB: not on the flood risk listTN21 9ND: not on the flood risk listTN21 9NE: not on the flood risk listTN21 9NG: not on the flood risk listTN21 9NH: not on the flood risk listTN21 9NJ: not on the flood risk listTN21 9NL: not on the flood risk listTN21 9NN: not on the flood risk listTN21 9NP: not on the flood risk listTN21 9NR: not on the flood risk listTN21 9NS: not on the flood risk listTN21 9NT: not on the flood risk listTN21 9NU: not on the flood risk listTN21 9NX: not on the flood risk listTN21 9PA: not on the flood risk listTN21 9PB: not on the flood risk listTN21 9PD: not on the flood risk listTN21 9PE: not on the flood risk listTN21 9PH: not on the flood risk listTN21 9PJ: not on the flood risk listTN21 9PL: not on the flood risk listTN21 9PN: not on the flood risk listTN21 9PP: not on the flood risk listTN21 9PQ: not on the flood risk listTN21 9PR: not on the flood risk listTN21 9PS: not on the flood risk listTN21 9PT: not on the flood risk listTN21 9PU: not on the flood risk listTN21 9QA: not on the flood risk listTN21 9QB: not on the flood risk listTN21 9QD: not on the flood risk listTN21 9QE: not on the flood risk listTN21 9QG: not on the flood risk listTN21 9QJ: not on the flood risk listTN21 9QL: not on the flood risk listTN21 9QN: not on the flood risk listTN21 9QP: not on the flood risk listTN21 9QR: not on the flood risk listTN21 9QS: not on the flood risk listTN21 9QT: not on the flood risk listTN21 9QU: not on the flood risk listTN21 9QW: not on the flood risk listTN21 9QX: not on the flood risk listTN21 9QY: not on the flood risk listTN21 9QZ: not on the flood risk listTN21 9RA: not on the flood risk listTN21 9RB: not on the flood risk listTN21 9RD: not on the flood risk listTN21 9RE: not on the flood risk listTN21 9RG: not on the flood risk listTN21 9RH: not on the flood risk listTN21 9ZF: not on the flood risk listTN21 9AP: low flood risk at worstTN21 9AR: low flood risk at worstTN21 9JG: low flood risk at worstTN21 9JJ: low flood risk at worstTN21 9PX: low flood risk at worstTN21 9ED: high flood riskTN21 9HB: high flood risk Heathfield Map of every postcode in the TN21 9 sector, by flood risk Of the 173 postcodes in the TN21 9 sector that ONS places, 2 have a home or business at high risk, 5 are at low risk at worst and 166 are not on the Environment Agency's at-risk list. Places named: Heathfield. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A265 Heathfield
  • A home or business at high risk: 2
  • At medium risk at worst: 0
  • At low risk at worst: 5
  • At very low risk only: 0
  • Not on the at-risk list: 166

Of the 173 postcodes in the TN21 9 sector that ONS places, 2 have a home or business at high risk, 5 are at low risk at worst and 166 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 high risk

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

TN21 9ED9 at high riskTN21 9HB3 at high risk

What do homes sell for in TN21 9?

Homes in TN21 9 sold for a typical £506,250 in the 12 months to August 2026, across 34 sales, up 13.1% on the 12 months before, HM Land Registry's figures show.

£506,250 typical price, the 12 months to August 2026
£447,500 12 months to August 2025
▲ up 13.1% on the 12 months before
  • Detached £607,000 21 sales
  • Semi-detached £470,000 8 sales
  • Terraced £283,000 5 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 TN21 9. 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 TN21 9

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.

TN21 9AATN21 9ABTN21 9ADTN21 9AETN21 9AGTN21 9AHTN21 9AJTN21 9ALTN21 9ANTN21 9APTN21 9AQTN21 9ARTN21 9ASTN21 9ATTN21 9AUTN21 9AXTN21 9AYTN21 9AZTN21 9BATN21 9BBTN21 9BDTN21 9BETN21 9BFTN21 9BGTN21 9BHTN21 9BJTN21 9BLTN21 9BNTN21 9BPTN21 9BSTN21 9BTTN21 9BUTN21 9BXTN21 9BYTN21 9DATN21 9DBTN21 9DDTN21 9DETN21 9DFTN21 9DGTN21 9DHTN21 9DJTN21 9DLTN21 9DNTN21 9DPTN21 9DQTN21 9DRTN21 9DSTN21 9DTTN21 9DUTN21 9DWTN21 9DZTN21 9EATN21 9EBTN21 9EDTN21 9EETN21 9EFTN21 9EGTN21 9EHTN21 9EJTN21 9ELTN21 9ENTN21 9EPTN21 9EQTN21 9ERTN21 9ESTN21 9ETTN21 9EUTN21 9EWTN21 9EXTN21 9EYTN21 9HATN21 9HBTN21 9HDTN21 9HETN21 9HFTN21 9HGTN21 9HHTN21 9HJTN21 9HNTN21 9HPTN21 9HQTN21 9HTTN21 9HUTN21 9HXTN21 9JATN21 9JBTN21 9JDTN21 9JETN21 9JGTN21 9JHTN21 9JJTN21 9JLTN21 9JNTN21 9JPTN21 9JRTN21 9JSTN21 9JUTN21 9JXTN21 9LATN21 9LBTN21 9LDTN21 9LETN21 9LFTN21 9LGTN21 9LHTN21 9LJTN21 9LLTN21 9LNTN21 9LPTN21 9LQTN21 9LRTN21 9LSTN21 9LTTN21 9LUTN21 9LWTN21 9LXTN21 9LYTN21 9NATN21 9NBTN21 9NDTN21 9NETN21 9NGTN21 9NHTN21 9NJTN21 9NLTN21 9NNTN21 9NPTN21 9NRTN21 9NSTN21 9NTTN21 9NUTN21 9NXTN21 9PATN21 9PBTN21 9PDTN21 9PETN21 9PHTN21 9PJTN21 9PLTN21 9PNTN21 9PPTN21 9PQTN21 9PRTN21 9PSTN21 9PTTN21 9PUTN21 9PXTN21 9QATN21 9QBTN21 9QDTN21 9QETN21 9QGTN21 9QHTN21 9QJTN21 9QLTN21 9QNTN21 9QPTN21 9QRTN21 9QSTN21 9QTTN21 9QUTN21 9QWTN21 9QXTN21 9QYTN21 9QZTN21 9RATN21 9RBTN21 9RDTN21 9RETN21 9RGTN21 9RHTN21 9ZF

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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