HA1 1 postcode sector in the HA1 district

HA1 1 is a sector of the HA1 district: every postcode that starts HA1 1. It has 174 postcodes in use, 6 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 HA1 1 sector, by flood risk

Map of every postcode in the HA1 1 sector, by flood risk Of the 174 postcodes in the HA1 1 sector that ONS places, 174 are not on the Environment Agency's at-risk list. Places named: Harrow. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A404 HA1 1AA: not on the flood risk listHA1 1AF: not on the flood risk listHA1 1AR: not on the flood risk listHA1 1AS: not on the flood risk listHA1 1AT: not on the flood risk listHA1 1AY: not on the flood risk listHA1 1BA: not on the flood risk listHA1 1BB: not on the flood risk listHA1 1BD: not on the flood risk listHA1 1BE: not on the flood risk listHA1 1BH: not on the flood risk listHA1 1BQ: not on the flood risk listHA1 1BW: not on the flood risk listHA1 1DR: not on the flood risk listHA1 1DZ: not on the flood risk listHA1 1EH: not on the flood risk listHA1 1EP: not on the flood risk listHA1 1EQ: not on the flood risk listHA1 1ER: not on the flood risk listHA1 1FD: not on the flood risk listHA1 1GN: not on the flood risk listHA1 1GS: not on the flood risk listHA1 1GU: not on the flood risk listHA1 1GW: not on the flood risk listHA1 1GX: not on the flood risk listHA1 1GY: not on the flood risk listHA1 1GZ: not on the flood risk listHA1 1HE: not on the flood risk listHA1 1HL: not on the flood risk listHA1 1HN: not on the flood risk listHA1 1HP: not on the flood risk listHA1 1HQ: not on the flood risk listHA1 1HS: not on the flood risk listHA1 1JN: not on the flood risk listHA1 1JP: not on the flood risk listHA1 1JR: not on the flood risk listHA1 1JS: not on the flood risk listHA1 1JU: not on the flood risk listHA1 1JX: not on the flood risk listHA1 1JY: not on the flood risk listHA1 1JZ: not on the flood risk listHA1 1LA: not on the flood risk listHA1 1LD: not on the flood risk listHA1 1LE: not on the flood risk listHA1 1LF: not on the flood risk listHA1 1LG: not on the flood risk listHA1 1LH: not on the flood risk listHA1 1LN: not on the flood risk listHA1 1LQ: not on the flood risk listHA1 1NB: not on the flood risk listHA1 1ND: not on the flood risk listHA1 1NL: not on the flood risk listHA1 1NP: not on the flood risk listHA1 1NR: not on the flood risk listHA1 1NS: not on the flood risk listHA1 1NT: not on the flood risk listHA1 1NU: not on the flood risk listHA1 1NX: not on the flood risk listHA1 1NY: not on the flood risk listHA1 1NZ: not on the flood risk listHA1 1PA: not on the flood risk listHA1 1PB: not on the flood risk listHA1 1PD: not on the flood risk listHA1 1PE: not on the flood risk listHA1 1PF: not on the flood risk listHA1 1PG: not on the flood risk listHA1 1PQ: not on the flood risk listHA1 1PS: not on the flood risk listHA1 1PT: not on the flood risk listHA1 1PY: not on the flood risk listHA1 1QA: not on the flood risk listHA1 1QB: not on the flood risk listHA1 1QD: not on the flood risk listHA1 1QF: not on the flood risk listHA1 1QJ: not on the flood risk listHA1 1QL: not on the flood risk listHA1 1QN: not on the flood risk listHA1 1QP: not on the flood risk listHA1 1QQ: not on the flood risk listHA1 1QR: not on the flood risk listHA1 1QS: not on the flood risk listHA1 1QT: not on the flood risk listHA1 1QU: not on the flood risk listHA1 1QW: not on the flood risk listHA1 1RB: not on the flood risk listHA1 1RD: not on the flood risk listHA1 1RE: not on the flood risk listHA1 1RF: not on the flood risk listHA1 1RG: not on the flood risk listHA1 1RH: not on the flood risk listHA1 1RJ: not on the flood risk listHA1 1RN: not on the flood risk listHA1 1RP: not on the flood risk listHA1 1RQ: not on the flood risk listHA1 1RR: not on the flood risk listHA1 1RS: not on the flood risk listHA1 1RT: not on the flood risk listHA1 1RU: not on the flood risk listHA1 1RW: not on the flood risk listHA1 1RX: not on the flood risk listHA1 1RY: not on the flood risk listHA1 1RZ: not on the flood risk listHA1 1SA: not on the flood risk listHA1 1SB: not on the flood risk listHA1 1SD: not on the flood risk listHA1 1SE: not on the flood risk listHA1 1SF: not on the flood risk listHA1 1SG: not on the flood risk listHA1 1SH: not on the flood risk listHA1 1SJ: not on the flood risk listHA1 1SL: not on the flood risk listHA1 1SP: not on the flood risk listHA1 1SQ: not on the flood risk listHA1 1SR: not on the flood risk listHA1 1SS: not on the flood risk listHA1 1SU: not on the flood risk listHA1 1SX: not on the flood risk listHA1 1SY: not on the flood risk listHA1 1SZ: not on the flood risk listHA1 1TA: not on the flood risk listHA1 1TB: not on the flood risk listHA1 1TD: not on the flood risk listHA1 1TE: not on the flood risk listHA1 1TG: not on the flood risk listHA1 1TH: not on the flood risk listHA1 1TJ: not on the flood risk listHA1 1TL: not on the flood risk listHA1 1TN: not on the flood risk listHA1 1TQ: not on the flood risk listHA1 1TX: not on the flood risk listHA1 1TY: not on the flood risk listHA1 1TZ: not on the flood risk listHA1 1UA: not on the flood risk listHA1 1UB: not on the flood risk listHA1 1UD: not on the flood risk listHA1 1UE: not on the flood risk listHA1 1UF: not on the flood risk listHA1 1UG: not on the flood risk listHA1 1UH: not on the flood risk listHA1 1UJ: not on the flood risk listHA1 1UL: not on the flood risk listHA1 1UN: not on the flood risk listHA1 1UP: not on the flood risk listHA1 1UQ: not on the flood risk listHA1 1UR: not on the flood risk listHA1 1UT: not on the flood risk listHA1 1UU: not on the flood risk listHA1 1UW: not on the flood risk listHA1 1UX: not on the flood risk listHA1 1XD: not on the flood risk listHA1 1XE: not on the flood risk listHA1 1XF: not on the flood risk listHA1 1XH: not on the flood risk listHA1 1XJ: not on the flood risk listHA1 1XL: not on the flood risk listHA1 1XN: not on the flood risk listHA1 1XP: not on the flood risk listHA1 1XR: not on the flood risk listHA1 1XS: not on the flood risk listHA1 1XT: not on the flood risk listHA1 1XU: not on the flood risk listHA1 1XW: not on the flood risk listHA1 1XX: not on the flood risk listHA1 1XY: not on the flood risk listHA1 1XZ: not on the flood risk listHA1 1YB: not on the flood risk list Harrow Map of every postcode in the HA1 1 sector, by flood risk Of the 174 postcodes in the HA1 1 sector that ONS places, 174 are not on the Environment Agency's at-risk list. Places named: Harrow. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Harrow
  • 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: 174

Of the 174 postcodes in the HA1 1 sector that ONS places, 174 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

What do homes sell for in HA1 1?

Homes in HA1 1 sold for a typical £395,250 in the 12 months to August 2026, across 40 sales, up 7.1% on the 12 months before, HM Land Registry's figures show.

£395,250 typical price, the 12 months to August 2026
£369,125 12 months to August 2025
▲ up 7.1% on the 12 months before
  • Detached 1 sale, too few to price
  • Semi-detached £642,000 7 sales
  • Terraced £590,000 5 sales
  • Flat or maisonette £340,000 27 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 HA1 1. 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 HA1 1

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.

HA1 1AAHA1 1AFHA1 1ARHA1 1ASHA1 1ATHA1 1AYHA1 1BAHA1 1BBHA1 1BDHA1 1BEHA1 1BHHA1 1BQHA1 1BWHA1 1DRHA1 1DZHA1 1EHHA1 1ELHA1 1EPHA1 1EQHA1 1ERHA1 1FDHA1 1GNHA1 1GPHA1 1GSHA1 1GUHA1 1GWHA1 1GXHA1 1GYHA1 1GZHA1 1HEHA1 1HLHA1 1HNHA1 1HPHA1 1HQHA1 1HSHA1 1HUHA1 1JNHA1 1JPHA1 1JRHA1 1JSHA1 1JTHA1 1JUHA1 1JXHA1 1JYHA1 1JZHA1 1LAHA1 1LDHA1 1LEHA1 1LFHA1 1LGHA1 1LHHA1 1LJHA1 1LNHA1 1LQHA1 1NAHA1 1NBHA1 1NDHA1 1NLHA1 1NPHA1 1NRHA1 1NSHA1 1NTHA1 1NUHA1 1NXHA1 1NYHA1 1NZHA1 1PAHA1 1PBHA1 1PDHA1 1PEHA1 1PFHA1 1PGHA1 1PQHA1 1PSHA1 1PTHA1 1PYHA1 1QAHA1 1QBHA1 1QDHA1 1QFHA1 1QJHA1 1QLHA1 1QNHA1 1QPHA1 1QQHA1 1QRHA1 1QSHA1 1QTHA1 1QUHA1 1QWHA1 1RAHA1 1RBHA1 1RDHA1 1REHA1 1RFHA1 1RGHA1 1RHHA1 1RJHA1 1RNHA1 1RPHA1 1RQHA1 1RRHA1 1RSHA1 1RTHA1 1RUHA1 1RWHA1 1RXHA1 1RYHA1 1RZHA1 1SAHA1 1SBHA1 1SDHA1 1SEHA1 1SFHA1 1SGHA1 1SHHA1 1SJHA1 1SLHA1 1SPHA1 1SQHA1 1SRHA1 1SSHA1 1SUHA1 1SXHA1 1SYHA1 1SZHA1 1TAHA1 1TBHA1 1TDHA1 1TEHA1 1TGHA1 1THHA1 1TJHA1 1TLHA1 1TNHA1 1TQHA1 1TXHA1 1TYHA1 1TZHA1 1UAHA1 1UBHA1 1UDHA1 1UEHA1 1UFHA1 1UGHA1 1UHHA1 1UJHA1 1ULHA1 1UNHA1 1UPHA1 1UQHA1 1URHA1 1UTHA1 1UUHA1 1UWHA1 1UXHA1 1XDHA1 1XEHA1 1XFHA1 1XHHA1 1XJHA1 1XLHA1 1XNHA1 1XPHA1 1XRHA1 1XSHA1 1XTHA1 1XUHA1 1XWHA1 1XXHA1 1XYHA1 1XZHA1 1YBHA1 1YJ

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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