SO17 3 postcode sector in the SO17 district

SO17 3 is a sector of the SO17 district: every postcode that starts SO17 3. It has 74 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 SO17 3 sector, by gigabit broadband

Map of every postcode in the SO17 3 sector, by gigabit broadband Of the 74 postcodes in the SO17 3 sector that ONS places, 1 have no home or business that can get gigabit, 3 have some that can, 68 can all get it and 2 have no Ofcom figure. One postcode lies beyond the edge and is listed under the map. Places named: Swaythling. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A335 SO17 3AX: no Ofcom figureSO17 3AA: gigabit for allSO17 3AB: gigabit for allSO17 3AD: gigabit for allSO17 3AE: gigabit for allSO17 3AF: gigabit for allSO17 3AG: gigabit for allSO17 3AH: gigabit for allSO17 3AJ: gigabit for allSO17 3AP: gigabit for allSO17 3AQ: gigabit for allSO17 3AR: gigabit for allSO17 3AS: gigabit for allSO17 3AU: gigabit for allSO17 3AW: gigabit for allSO17 3BD: gigabit for allSO17 3ES: gigabit for allSO17 3QY: gigabit for allSO17 3QZ: gigabit for allSO17 3RA: gigabit for allSO17 3RB: gigabit for allSO17 3RD: gigabit for allSO17 3RE: gigabit for allSO17 3RF: gigabit for allSO17 3RG: gigabit for allSO17 3RH: gigabit for allSO17 3RJ: gigabit for allSO17 3RL: gigabit for allSO17 3RN: gigabit for allSO17 3RP: gigabit for allSO17 3RQ: gigabit for allSO17 3RS: gigabit for allSO17 3RT: gigabit for allSO17 3RU: gigabit for allSO17 3RW: gigabit for allSO17 3RX: gigabit for allSO17 3RY: gigabit for allSO17 3RZ: gigabit for allSO17 3SA: gigabit for allSO17 3SB: gigabit for allSO17 3SD: gigabit for allSO17 3SE: gigabit for allSO17 3SF: gigabit for allSO17 3SG: gigabit for allSO17 3SH: gigabit for allSO17 3SJ: gigabit for allSO17 3SL: gigabit for allSO17 3SN: gigabit for allSO17 3SP: gigabit for allSO17 3SQ: gigabit for allSO17 3SS: gigabit for allSO17 3ST: gigabit for allSO17 3SU: gigabit for allSO17 3SW: gigabit for allSO17 3SX: gigabit for allSO17 3SY: gigabit for allSO17 3SZ: gigabit for allSO17 3TA: gigabit for allSO17 3TB: gigabit for allSO17 3TD: gigabit for allSO17 3TE: gigabit for allSO17 3TF: gigabit for allSO17 3TG: gigabit for allSO17 3TH: gigabit for allSO17 3TJ: gigabit for allSO17 3TL: gigabit for allSO17 3TN: gigabit for allSO17 3TW: gigabit for allSO17 3UA: gigabit for allSO17 3AN: some gigabitSO17 3AT: some gigabitSO17 3EA: some gigabitSO17 3ED: no gigabit Swaythling Map of every postcode in the SO17 3 sector, by gigabit broadband Of the 74 postcodes in the SO17 3 sector that ONS places, 1 have no home or business that can get gigabit, 3 have some that can, 68 can all get it and 2 have no Ofcom figure. One postcode lies beyond the edge and is listed under the map. Places named: Swaythling. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Swaythling
  • No home or business can get gigabit: 1
  • Some can get gigabit: 3
  • Every home and business can get gigabit: 68
  • Ofcom gives no figure: 2

Of the 74 postcodes in the SO17 3 sector that ONS places, 1 have no home or business that can get gigabit, 3 have some that can, 68 can all get it and 2 have no Ofcom figure.

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.

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; Ofcom Connected Nations, Connected Nations, Spring 2026; roads, rivers and built-up areas: Ordnance Survey open maps. 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.

Postcodes without gigabit

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

What do homes sell for in SO17 3?

Homes in SO17 3 sold for a typical £283,000 in the 12 months to September 2026, across 13 sales, HM Land Registry's figures show. The 12 months before gave £310,000 from 33 sales. With fewer than 30 sales a year, a change can come from which homes happened to sell, so we do not give one.

£283,000 typical price, the 12 months to September 2026
£310,000 12 months to September 2025
  • Semi-detached £300,000 9 sales
  • Terraced 2 sales, too few to price
  • Flat or maisonette 2 sales, too few to price

Standard sales of homes at market value at the postcodes that start SO17 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 October 2026.

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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Where the facts on this page come from

Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0.

Licence: Open Government Licence v3.0.

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