L17 3 postcode sector in the L17 district

L17 3 is a sector of the L17 district: every postcode that starts L17 3. It has 35 postcodes in use, 2 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 L17 3 sector, by flood risk

Map of every postcode in the L17 3 sector, by flood risk Of the 35 postcodes in the L17 3 sector that ONS places, 35 are not on the Environment Agency's at-risk list. Places named: Arundel, Sefton Park. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A5089 L17 3AA: not on the flood risk listL17 3AD: not on the flood risk listL17 3AF: not on the flood risk listL17 3AG: not on the flood risk listL17 3AH: not on the flood risk listL17 3AL: not on the flood risk listL17 3AN: not on the flood risk listL17 3AR: not on the flood risk listL17 3AS: not on the flood risk listL17 3AT: not on the flood risk listL17 3AU: not on the flood risk listL17 3AW: not on the flood risk listL17 3AX: not on the flood risk listL17 3AY: not on the flood risk listL17 3AZ: not on the flood risk listL17 3BA: not on the flood risk listL17 3BB: not on the flood risk listL17 3BD: not on the flood risk listL17 3BE: not on the flood risk listL17 3BG: not on the flood risk listL17 3BH: not on the flood risk listL17 3BL: not on the flood risk listL17 3BP: not on the flood risk listL17 3BQ: not on the flood risk listL17 3BT: not on the flood risk listL17 3BU: not on the flood risk listL17 3BX: not on the flood risk listL17 3BY: not on the flood risk listL17 3DA: not on the flood risk listL17 3DB: not on the flood risk listL17 3DQ: not on the flood risk listL17 3WU: not on the flood risk list ArundelSefton Park Map of every postcode in the L17 3 sector, by flood risk Of the 35 postcodes in the L17 3 sector that ONS places, 35 are not on the Environment Agency's at-risk list. Places named: Arundel, Sefton Park. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A5089 ArundelSefton Park
  • 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: 35

Of the 35 postcodes in the L17 3 sector that ONS places, 35 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. 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

What do homes sell for in L17 3?

Homes in L17 3 sold for a typical £192,375 in the 12 months to August 2026, across 18 sales, up 2.2% on the 12 months before, HM Land Registry's figures show.

£192,375 typical price, the 12 months to August 2026
£188,250 12 months to August 2025
▲ up 2.2% on the 12 months before
  • Semi-detached 2 sales, too few to price
  • Terraced 2 sales, too few to price
  • Flat or maisonette £172,000 14 sales

Standard sales of homes at market value at the postcodes that start L17 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 L17 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.

L17 3AAL17 3ADL17 3AFL17 3AGL17 3AHL17 3AJL17 3ALL17 3ANL17 3AQL17 3ARL17 3ASL17 3ATL17 3AUL17 3AWL17 3AXL17 3AYL17 3AZL17 3BAL17 3BBL17 3BDL17 3BEL17 3BGL17 3BHL17 3BLL17 3BPL17 3BQL17 3BTL17 3BUL17 3BXL17 3BYL17 3DAL17 3DBL17 3DQL17 3WUL17 3WZ

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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