SN3 4 postcode sector in the SN3 district

SN3 4 is a sector of the SN3 district: every postcode that starts SN3 4. It has 332 postcodes in use, 7 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 SN3 4 sector, by gigabit broadband

No home or business can get gigabit: 13
Some can get gigabit: 18
Every home and business can get gigabit: 290
Ofcom gives no figure: 11

Of the 332 postcodes in the SN3 4 sector that ONS places, 13 have no home or business that can get gigabit, 18 have some that can, 290 can all get it and 11 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.

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

13 postcodes here have no gigabit. These are the 12 first in postcode order.

SN3 4BF SN3 4FX SN3 4RU SN3 4SJ SN3 4SS SN3 4ST SN3 4SX SN3 4SY SN3 4SZ SN3 4TA SN3 4TD SN3 4TT

2 further out, not drawn

These postcodes lie well apart from the rest, so the map is drawn without them to show the rest closer; they are in every count.

SN3 4FB SN3 4SX

What do homes sell for in SN3 4?

Homes in SN3 4 sold for a typical £305,000 in the 12 months to September 2026, across 190 sales, HM Land Registry's figures show. The 12 months before gave £295,000 from 251 sales: not a change larger than chance would explain, given which homes happened to sell.

£305,000 typical price, the 12 months to September 2026

£295,000 12 months to September 2025

Detached £427,500 34 sales
Semi-detached £311,250 90 sales
Terraced £281,000 44 sales
Flat or maisonette £142,750 22 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 SN3 4. 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.

Postcodes in SN3 4

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.

SN3 4AA SN3 4AB SN3 4AD SN3 4AE SN3 4AF SN3 4AG SN3 4AH SN3 4AJ SN3 4AL SN3 4AN SN3 4AP SN3 4AQ SN3 4AR SN3 4AS SN3 4AT SN3 4AU SN3 4AW SN3 4AX SN3 4AY SN3 4AZ SN3 4BA SN3 4BB SN3 4BD SN3 4BE SN3 4BF SN3 4BG SN3 4BH SN3 4BJ SN3 4BL SN3 4BN SN3 4BP SN3 4BQ SN3 4BS SN3 4BT SN3 4BU SN3 4BW SN3 4BX SN3 4BY SN3 4BZ SN3 4DA SN3 4DB SN3 4DD SN3 4DE SN3 4DF SN3 4DH SN3 4DJ SN3 4DL SN3 4DN SN3 4DP SN3 4DQ SN3 4DR SN3 4DS SN3 4DT SN3 4DU SN3 4DW SN3 4DX SN3 4DY SN3 4DZ SN3 4EA SN3 4EB SN3 4ED SN3 4EE SN3 4EF SN3 4EG SN3 4EH SN3 4EJ SN3 4EL SN3 4EN SN3 4EP SN3 4EQ SN3 4ER SN3 4ES SN3 4ET SN3 4EU SN3 4EW SN3 4EX SN3 4EY SN3 4EZ SN3 4FA SN3 4FB SN3 4FD SN3 4FE SN3 4FF SN3 4FG SN3 4FH SN3 4FJ SN3 4FL SN3 4FN SN3 4FQ SN3 4FR SN3 4FS SN3 4FW SN3 4FX SN3 4FY SN3 4GA SN3 4GD SN3 4GF SN3 4GG SN3 4GH SN3 4GJ SN3 4GL SN3 4GQ SN3 4GR SN3 4GU SN3 4HA SN3 4HB SN3 4HD SN3 4HE SN3 4HF SN3 4HG SN3 4HH SN3 4HJ SN3 4HL SN3 4HN SN3 4HP SN3 4HQ SN3 4HR SN3 4HS SN3 4HT SN3 4HU SN3 4HW SN3 4HX SN3 4HY SN3 4HZ SN3 4JA SN3 4JB SN3 4JD SN3 4JE SN3 4JG SN3 4JH SN3 4JJ SN3 4JL SN3 4JN SN3 4JP SN3 4JQ SN3 4JR SN3 4JS SN3 4JT SN3 4JU SN3 4JW SN3 4JX SN3 4JY SN3 4JZ SN3 4LA SN3 4LB SN3 4LD SN3 4LE SN3 4LF SN3 4LG SN3 4LH SN3 4LJ SN3 4LL SN3 4LN SN3 4LQ SN3 4LR SN3 4LS SN3 4LT SN3 4LU SN3 4LW SN3 4LX SN3 4LY SN3 4LZ SN3 4NA SN3 4NB SN3 4ND SN3 4NE SN3 4NF SN3 4NG SN3 4NH SN3 4NJ SN3 4NL SN3 4NN SN3 4NP SN3 4NQ SN3 4NR SN3 4NS SN3 4NT SN3 4NU SN3 4NW SN3 4NX SN3 4NY SN3 4NZ SN3 4PA SN3 4PB SN3 4PD SN3 4PE SN3 4PF SN3 4PG SN3 4PH SN3 4PJ SN3 4PL SN3 4PN SN3 4PP SN3 4PQ SN3 4PR SN3 4PS SN3 4PT SN3 4PU SN3 4PW SN3 4PY SN3 4PZ SN3 4QA SN3 4QB SN3 4QD SN3 4QF SN3 4QG SN3 4QH SN3 4QL SN3 4QN SN3 4QP SN3 4QQ SN3 4QR SN3 4QS SN3 4QT SN3 4QU SN3 4QW SN3 4QX SN3 4QY SN3 4QZ SN3 4RB SN3 4RG SN3 4RH SN3 4RJ SN3 4RL SN3 4RN SN3 4RP SN3 4RQ SN3 4RR SN3 4RS SN3 4RT SN3 4RU SN3 4RX SN3 4RY SN3 4RZ SN3 4SA SN3 4SB SN3 4SD SN3 4SE SN3 4SF SN3 4SG SN3 4SH SN3 4SJ SN3 4SL SN3 4SN SN3 4SP SN3 4SQ SN3 4SR SN3 4SS SN3 4ST SN3 4SU SN3 4SW SN3 4SX SN3 4SY SN3 4SZ SN3 4TA SN3 4TB SN3 4TD SN3 4TE SN3 4TF SN3 4TG SN3 4TH SN3 4TJ SN3 4TL SN3 4TN SN3 4TP SN3 4TQ SN3 4TR SN3 4TS SN3 4TT SN3 4TU SN3 4TW SN3 4TX SN3 4TY SN3 4UA SN3 4UB SN3 4UD SN3 4UE SN3 4UF SN3 4UG SN3 4UH SN3 4UJ SN3 4UL SN3 4UN SN3 4UP SN3 4UQ SN3 4UR SN3 4US SN3 4UT SN3 4UU SN3 4UW SN3 4UX SN3 4UY SN3 4UZ SN3 4WA SN3 4WB SN3 4WD SN3 4WE SN3 4WF SN3 4WH SN3 4WQ SN3 4WT SN3 4WZ SN3 4XA SN3 4XB SN3 4XD SN3 4XE SN3 4XF SN3 4XG SN3 4XH SN3 4XL SN3 4XN SN3 4XP SN3 4XQ SN3 4XR SN3 4XS SN3 4XT SN3 4XU SN3 4XW SN3 4XX SN3 4XY SN3 4XZ SN3 4YA SN3 4YB SN3 4YD SN3 4YE SN3 4YF SN3 4YH SN3 4YQ SN3 4ZN SN3 4ZX SN3 4ZY SN3 4ZZ

Source: ONS Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed.

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.

Other sectors in SN3

SN3 0 sector SN3 1 sector SN3 2 sector SN3 3 sector SN3 5 sector SN3 6 sector SN3 9 sector All of SN3 SN postcode area

Check a postcode

Where the facts on this page come from

Office for National Statistics: ONS Postcode Directory
Ofcom Connected Nations
HM Land Registry Price Paid Data

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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