HA3 5 postcode sector in the HA3 district

HA3 5 is a sector of the HA3 district: every postcode that starts HA3 5. It has 171 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 HA3 5 sector, by flood risk

Map of every postcode in the HA3 5 sector, by flood risk Of the 171 postcodes in the HA3 5 sector that ONS places, 171 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. HA3 5AA: not on the flood risk listHA3 5AB: not on the flood risk listHA3 5AE: not on the flood risk listHA3 5AH: not on the flood risk listHA3 5AN: not on the flood risk listHA3 5AP: not on the flood risk listHA3 5AR: not on the flood risk listHA3 5AS: not on the flood risk listHA3 5AT: not on the flood risk listHA3 5AU: not on the flood risk listHA3 5AX: not on the flood risk listHA3 5AY: not on the flood risk listHA3 5AZ: not on the flood risk listHA3 5BA: not on the flood risk listHA3 5BB: not on the flood risk listHA3 5BD: not on the flood risk listHA3 5BJ: not on the flood risk listHA3 5BS: not on the flood risk listHA3 5BU: not on the flood risk listHA3 5BY: not on the flood risk listHA3 5DB: not on the flood risk listHA3 5DF: not on the flood risk listHA3 5DL: not on the flood risk listHA3 5DQ: not on the flood risk listHA3 5DS: not on the flood risk listHA3 5DT: not on the flood risk listHA3 5DU: not on the flood risk listHA3 5DX: not on the flood risk listHA3 5DY: not on the flood risk listHA3 5DZ: not on the flood risk listHA3 5EA: not on the flood risk listHA3 5EB: not on the flood risk listHA3 5EE: not on the flood risk listHA3 5EG: not on the flood risk listHA3 5EL: not on the flood risk listHA3 5EQ: not on the flood risk listHA3 5ES: not on the flood risk listHA3 5EU: not on the flood risk listHA3 5EX: not on the flood risk listHA3 5EY: not on the flood risk listHA3 5EZ: not on the flood risk listHA3 5FB: not on the flood risk listHA3 5FD: not on the flood risk listHA3 5FF: not on the flood risk listHA3 5FH: not on the flood risk listHA3 5GA: not on the flood risk listHA3 5HA: not on the flood risk listHA3 5HB: not on the flood risk listHA3 5HD: not on the flood risk listHA3 5HE: not on the flood risk listHA3 5HF: not on the flood risk listHA3 5HG: not on the flood risk listHA3 5HH: not on the flood risk listHA3 5HJ: not on the flood risk listHA3 5HN: not on the flood risk listHA3 5HP: not on the flood risk listHA3 5HQ: not on the flood risk listHA3 5HR: not on the flood risk listHA3 5HS: not on the flood risk listHA3 5HT: not on the flood risk listHA3 5HU: not on the flood risk listHA3 5HW: not on the flood risk listHA3 5HX: not on the flood risk listHA3 5HY: not on the flood risk listHA3 5HZ: not on the flood risk listHA3 5JA: not on the flood risk listHA3 5JD: not on the flood risk listHA3 5JF: not on the flood risk listHA3 5JH: not on the flood risk listHA3 5JJ: not on the flood risk listHA3 5JL: not on the flood risk listHA3 5JN: not on the flood risk listHA3 5JP: not on the flood risk listHA3 5JQ: not on the flood risk listHA3 5JR: not on the flood risk listHA3 5JS: not on the flood risk listHA3 5JT: not on the flood risk listHA3 5JU: not on the flood risk listHA3 5JW: not on the flood risk listHA3 5JX: not on the flood risk listHA3 5JY: not on the flood risk listHA3 5JZ: not on the flood risk listHA3 5LA: not on the flood risk listHA3 5LB: not on the flood risk listHA3 5LD: not on the flood risk listHA3 5LE: not on the flood risk listHA3 5LF: not on the flood risk listHA3 5LG: not on the flood risk listHA3 5LP: not on the flood risk listHA3 5LR: not on the flood risk listHA3 5LS: not on the flood risk listHA3 5LT: not on the flood risk listHA3 5LU: not on the flood risk listHA3 5LX: not on the flood risk listHA3 5LY: not on the flood risk listHA3 5LZ: not on the flood risk listHA3 5NA: not on the flood risk listHA3 5NB: not on the flood risk listHA3 5ND: not on the flood risk listHA3 5NE: not on the flood risk listHA3 5NF: not on the flood risk listHA3 5NG: not on the flood risk listHA3 5NH: not on the flood risk listHA3 5NJ: not on the flood risk listHA3 5NL: not on the flood risk listHA3 5NN: not on the flood risk listHA3 5NP: not on the flood risk listHA3 5NQ: not on the flood risk listHA3 5NR: not on the flood risk listHA3 5NS: not on the flood risk listHA3 5NT: not on the flood risk listHA3 5NU: not on the flood risk listHA3 5NW: not on the flood risk listHA3 5NX: not on the flood risk listHA3 5NY: not on the flood risk listHA3 5NZ: not on the flood risk listHA3 5PA: not on the flood risk listHA3 5PB: not on the flood risk listHA3 5PE: not on the flood risk listHA3 5PH: not on the flood risk listHA3 5PJ: not on the flood risk listHA3 5PL: not on the flood risk listHA3 5PN: not on the flood risk listHA3 5PP: not on the flood risk listHA3 5PQ: not on the flood risk listHA3 5PR: not on the flood risk listHA3 5PS: not on the flood risk listHA3 5PT: not on the flood risk listHA3 5PU: not on the flood risk listHA3 5PW: not on the flood risk listHA3 5PX: not on the flood risk listHA3 5PY: not on the flood risk listHA3 5PZ: not on the flood risk listHA3 5QA: not on the flood risk listHA3 5QB: not on the flood risk listHA3 5QH: not on the flood risk listHA3 5QL: not on the flood risk listHA3 5QU: not on the flood risk listHA3 5QX: not on the flood risk listHA3 5QY: not on the flood risk listHA3 5QZ: not on the flood risk listHA3 5RA: not on the flood risk listHA3 5RB: not on the flood risk listHA3 5RE: not on the flood risk listHA3 5RF: not on the flood risk listHA3 5RG: not on the flood risk listHA3 5RJ: not on the flood risk listHA3 5RL: not on the flood risk listHA3 5RN: not on the flood risk listHA3 5RP: not on the flood risk listHA3 5RQ: not on the flood risk listHA3 5RS: not on the flood risk listHA3 5RT: not on the flood risk listHA3 5RU: not on the flood risk listHA3 5RX: not on the flood risk listHA3 5RY: not on the flood risk listHA3 5RZ: not on the flood risk listHA3 5SA: not on the flood risk listHA3 5SB: not on the flood risk listHA3 5SD: not on the flood risk listHA3 5SE: not on the flood risk listHA3 5SH: not on the flood risk listHA3 5TE: not on the flood risk listHA3 5TJ: not on the flood risk listHA3 5UB: not on the flood risk listHA3 5WD: not on the flood risk list Harrow Map of every postcode in the HA3 5 sector, by flood risk Of the 171 postcodes in the HA3 5 sector that ONS places, 171 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 500 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: 171

Of the 171 postcodes in the HA3 5 sector that ONS places, 171 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 HA3 5?

Homes in HA3 5 sold for a typical £470,000 in the 12 months to August 2026, across 37 sales, up 9.7% on the 12 months before, HM Land Registry's figures show.

£470,000 typical price, the 12 months to August 2026
£428,500 12 months to August 2025
▲ up 9.7% on the 12 months before
  • Detached 1 sale, too few to price
  • Semi-detached £535,000 11 sales
  • Terraced £515,000 9 sales
  • Flat or maisonette £292,500 16 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 HA3 5. 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 HA3 5

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.

HA3 5AAHA3 5ABHA3 5AEHA3 5AHHA3 5ANHA3 5APHA3 5ARHA3 5ASHA3 5ATHA3 5AUHA3 5AXHA3 5AYHA3 5AZHA3 5BAHA3 5BBHA3 5BDHA3 5BJHA3 5BSHA3 5BUHA3 5BYHA3 5DBHA3 5DFHA3 5DLHA3 5DQHA3 5DSHA3 5DTHA3 5DUHA3 5DXHA3 5DYHA3 5DZHA3 5EAHA3 5EBHA3 5EEHA3 5EGHA3 5ELHA3 5EQHA3 5ESHA3 5EUHA3 5EXHA3 5EYHA3 5EZHA3 5FBHA3 5FDHA3 5FEHA3 5FFHA3 5FHHA3 5FJHA3 5GAHA3 5HAHA3 5HBHA3 5HDHA3 5HEHA3 5HFHA3 5HGHA3 5HHHA3 5HJHA3 5HNHA3 5HPHA3 5HQHA3 5HRHA3 5HSHA3 5HTHA3 5HUHA3 5HWHA3 5HXHA3 5HYHA3 5HZHA3 5JAHA3 5JDHA3 5JFHA3 5JHHA3 5JJHA3 5JLHA3 5JNHA3 5JPHA3 5JQHA3 5JRHA3 5JSHA3 5JTHA3 5JUHA3 5JWHA3 5JXHA3 5JYHA3 5JZHA3 5LAHA3 5LBHA3 5LDHA3 5LEHA3 5LFHA3 5LGHA3 5LPHA3 5LRHA3 5LSHA3 5LTHA3 5LUHA3 5LXHA3 5LYHA3 5LZHA3 5NAHA3 5NBHA3 5NDHA3 5NEHA3 5NFHA3 5NGHA3 5NHHA3 5NJHA3 5NLHA3 5NNHA3 5NPHA3 5NQHA3 5NRHA3 5NSHA3 5NTHA3 5NUHA3 5NWHA3 5NXHA3 5NYHA3 5NZHA3 5PAHA3 5PBHA3 5PEHA3 5PHHA3 5PJHA3 5PLHA3 5PNHA3 5PPHA3 5PQHA3 5PRHA3 5PSHA3 5PTHA3 5PUHA3 5PWHA3 5PXHA3 5PYHA3 5PZHA3 5QAHA3 5QBHA3 5QHHA3 5QJHA3 5QLHA3 5QUHA3 5QXHA3 5QYHA3 5QZHA3 5RAHA3 5RBHA3 5REHA3 5RFHA3 5RGHA3 5RJHA3 5RLHA3 5RNHA3 5RPHA3 5RQHA3 5RSHA3 5RTHA3 5RUHA3 5RXHA3 5RYHA3 5RZHA3 5SAHA3 5SBHA3 5SDHA3 5SEHA3 5SHHA3 5TEHA3 5TJHA3 5UBHA3 5WDHA3 5XHHA3 5XL

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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