SN4 postcode district: Royal Wootton Bassett and around

SN4 is a postcode district in England, with 916 postcodes in use in 5 sectors. It has postcodes in Royal Wootton Bassett, Wroughton, Chiseldon and 2 more places. It is split between 2 councils: Wiltshire (528 postcodes) and Swindon (388).

Postcodes in use
916
Sectors
5
Councils
2 councils
Places
5 places

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in SN4, by flood risk

Map of every postcode in SN4, by flood risk Of the 916 postcodes in SN4 that ONS places, 7 have a home or business at high risk, 8 are at medium risk at worst, 11 are at low risk at worst and 890 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: Royal Wootton Bassett, Swindon, Wroughton, Chiseldon, Wanborough. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A4361A346A419 SN4 0AA: not on the flood risk listSN4 0AD: not on the flood risk listSN4 0AF: not on the flood risk listSN4 0AG: not on the flood risk listSN4 0AJ: not on the flood risk listSN4 0AN: not on the flood risk listSN4 0AP: not on the flood risk listSN4 0AS: not on the flood risk listSN4 0AT: not on the flood risk listSN4 0AW: not on the flood risk listSN4 0AX: not on the flood risk listSN4 0AY: not on the flood risk listSN4 0BE: not on the flood risk listSN4 0BF: not on the flood risk listSN4 0BG: not on the flood risk listSN4 0BP: not on the flood risk listSN4 0BZ: not on the flood risk listSN4 0DA: not on the flood risk listSN4 0DB: not on the flood risk listSN4 0DH: not on the flood risk listSN4 0DJ: not on the flood risk listSN4 0DL: not on the flood risk listSN4 0DP: not on the flood risk listSN4 0DQ: not on the flood risk listSN4 0DR: not on the flood risk listSN4 0DS: not on the flood risk listSN4 0DT: not on the flood risk listSN4 0DU: not on the flood risk listSN4 0DX: not on the flood risk listSN4 0DZ: not on the flood risk listSN4 0EB: not on the flood risk listSN4 0EF: not on the flood risk listSN4 0EP: not on the flood risk listSN4 0ER: not on the flood risk listSN4 0ES: not on the flood risk listSN4 0ET: not on the flood risk listSN4 0EU: not on the flood risk listSN4 0EX: not on the flood risk listSN4 0EY: not on the flood risk listSN4 0EZ: not on the flood risk listSN4 0FF: not on the flood risk listSN4 0FG: not on the flood risk listSN4 0FH: not on the flood risk listSN4 0FJ: not on the flood risk listSN4 0FL: not on the flood risk listSN4 0FN: not on the flood risk listSN4 0FP: not on the flood risk listSN4 0FR: not on the flood risk listSN4 0FS: not on the flood risk listSN4 0FU: not on the flood risk listSN4 0FX: not on the flood risk listSN4 0FY: not on the flood risk listSN4 0GD: not on the flood risk listSN4 0GE: not on the flood risk listSN4 0GG: not on the flood risk listSN4 0GN: not on the flood risk listSN4 0GQ: not on the flood risk listSN4 0GR: not on the flood risk listSN4 0HA: not on the flood risk listSN4 0HB: not on the flood risk listSN4 0HD: not on the flood risk listSN4 0HE: not on the flood risk listSN4 0HG: not on the flood risk listSN4 0HH: not on the flood risk listSN4 0HJ: not on the flood risk listSN4 0HN: not on the flood risk listSN4 0HR: not on the flood risk listSN4 0HS: not on the flood risk listSN4 0HT: not on the flood risk listSN4 0HU: not on the flood risk listSN4 0HW: not on the flood risk listSN4 0HY: not on the flood risk listSN4 0HZ: not on the flood risk listSN4 0JA: not on the flood risk listSN4 0JB: not on the flood risk listSN4 0JF: not on the flood risk listSN4 0JG: not on the flood risk listSN4 0JJ: not on the flood risk listSN4 0JL: not on the flood risk listSN4 0JN: not on the flood risk listSN4 0JR: not on the flood risk listSN4 0LB: not on the flood risk listSN4 0LE: not on the flood risk listSN4 0LF: not on the flood risk listSN4 0LN: not on the flood risk listSN4 0LP: not on the flood risk listSN4 0LS: not on the flood risk listSN4 0LU: not on the flood risk listSN4 0NA: not on the flood risk listSN4 0ND: not on the flood risk listSN4 0NE: not on the flood risk listSN4 0NH: not on the flood risk listSN4 0NN: not on the flood risk listSN4 0NP: not on the flood risk listSN4 0NR: not on the flood risk listSN4 0NS: not on the flood risk listSN4 0NU: not on the flood risk listSN4 0NZ: not on the flood risk listSN4 0PB: not on the flood risk listSN4 0PE: not on the flood risk listSN4 0PH: not on the flood risk listSN4 0PP: not on the flood risk listSN4 0PR: not on the flood risk listSN4 0PY: not on the flood risk listSN4 0PZ: not on the flood risk listSN4 0QB: not on the flood risk listSN4 0QE: not on the flood risk listSN4 0QF: not on the flood risk listSN4 0QG: not on the flood risk listSN4 0QH: not on the flood risk listSN4 0QJ: not on the flood risk listSN4 0QL: not on the flood risk listSN4 0QN: not on the flood risk listSN4 0QQ: not on the flood risk listSN4 0QR: not on the flood risk listSN4 0QS: not on the flood risk listSN4 0QU: not on the flood risk listSN4 0QW: not on the flood risk listSN4 0QZ: not on the flood risk listSN4 0RD: not on the flood risk listSN4 0RG: not on the flood risk listSN4 0RH: not on the flood risk listSN4 0RJ: not on the flood risk listSN4 0RL: not on the flood risk listSN4 0RP: not on the flood risk listSN4 0RR: not on the flood risk listSN4 0SH: not on the flood risk listSN4 0SQ: not on the flood risk listSN4 0TA: not on the flood risk listSN4 0TH: not on the flood risk listSN4 0TJ: not on the flood risk listSN4 0TQ: not on the flood risk listSN4 7AA: not on the flood risk listSN4 7AF: not on the flood risk listSN4 7AG: not on the flood risk listSN4 7AH: not on the flood risk listSN4 7AJ: not on the flood risk listSN4 7AT: not on the flood risk listSN4 7BE: not on the flood risk listSN4 7BG: not on the flood risk listSN4 7BL: not on the flood risk listSN4 7BP: not on the flood risk listSN4 7BS: not on the flood risk listSN4 7BX: not on the flood risk listSN4 7BY: not on the flood risk listSN4 7DA: not on the flood risk listSN4 7DB: not on the flood risk listSN4 7DF: not on the flood risk listSN4 7DG: not on the flood risk listSN4 7DH: not on the flood risk listSN4 7DJ: not on the flood risk listSN4 7DL: not on the flood risk listSN4 7DP: not on the flood risk listSN4 7DU: not on the flood risk listSN4 7DX: not on the flood risk listSN4 7DZ: not on the flood risk listSN4 7ED: not on the flood risk listSN4 7EE: not on the flood risk listSN4 7EG: not on the flood risk listSN4 7EL: not on the flood risk listSN4 7EN: not on the flood risk listSN4 7ER: not on the flood risk listSN4 7ES: not on the flood risk listSN4 7FF: not on the flood risk listSN4 7FJ: not on the flood risk listSN4 7FL: not on the flood risk listSN4 7FR: not on the flood risk listSN4 7FS: not on the flood risk listSN4 7GE: not on the flood risk listSN4 7GG: not on the flood risk listSN4 7GH: not on the flood risk listSN4 7GL: not on the flood risk listSN4 7GZ: not on the flood risk listSN4 7HA: not on the flood risk listSN4 7HE: not on the flood risk listSN4 7HJ: not on the flood risk listSN4 7HL: not on the flood risk listSN4 7HN: not on the flood risk listSN4 7HQ: not on the flood risk listSN4 7HR: not on the flood risk listSN4 7HS: not on the flood risk listSN4 7HX: not on the flood risk listSN4 7HY: not on the flood risk listSN4 7JB: not on the flood risk listSN4 7JF: not on the flood risk listSN4 7JG: not on the flood risk listSN4 7JH: not on the flood risk listSN4 7JL: not on the flood risk listSN4 7PA: not on the flood risk listSN4 7PD: not on the flood risk listSN4 7PE: not on the flood risk listSN4 7PF: not on the flood risk listSN4 7PG: not on the flood risk listSN4 7PH: not on the flood risk listSN4 7PJ: not on the flood risk listSN4 7PL: not on the flood risk listSN4 7PP: not on the flood risk listSN4 7PQ: not on the flood risk listSN4 7PR: not on the flood risk listSN4 7PS: not on the flood risk listSN4 7PT: not on the flood risk listSN4 7PU: not on the flood risk listSN4 7PW: not on the flood risk listSN4 7PX: not on the flood risk listSN4 7PY: not on the flood risk listSN4 7PZ: not on the flood risk listSN4 7QA: not on the flood risk listSN4 7QB: not on the flood risk listSN4 7QD: not on the flood risk listSN4 7QE: not on the flood risk listSN4 7QJ: not on the flood risk listSN4 7QL: not on the flood risk listSN4 7QN: not on the flood risk listSN4 7QP: not on the flood risk listSN4 7QR: not on the flood risk listSN4 7QS: not on the flood risk listSN4 7QU: not on the flood risk listSN4 7QW: not on the flood risk listSN4 7QX: not on the flood risk listSN4 7QY: not on the flood risk listSN4 7QZ: not on the flood risk listSN4 7RA: not on the flood risk listSN4 7RB: not on the flood risk listSN4 7RD: not on the flood risk listSN4 7RE: not on the flood risk listSN4 7RG: not on the flood risk listSN4 7RH: not on the flood risk listSN4 7RJ: not on the flood risk listSN4 7RL: not on the flood risk listSN4 7RP: not on the flood risk listSN4 7RQ: not on the flood risk listSN4 7RR: not on the flood risk listSN4 7RT: not on the flood risk listSN4 7RU: not on the flood risk listSN4 7RY: not on the flood risk listSN4 7RZ: not on the flood risk listSN4 7SB: not on the flood risk listSN4 7SD: not on the flood risk listSN4 7SE: not on the flood risk listSN4 7SH: not on the flood risk listSN4 7SQ: not on the flood risk listSN4 7SR: not on the flood risk listSN4 8AA: not on the flood risk listSN4 8AF: not on the flood risk listSN4 8AG: not on the flood risk listSN4 8AH: not on the flood risk listSN4 8AJ: not on the flood risk listSN4 8AP: not on the flood risk listSN4 8AT: not on the flood risk listSN4 8AU: not on the flood risk listSN4 8AX: not on the flood risk listSN4 8BD: not on the flood risk listSN4 8BE: not on the flood risk listSN4 8BH: not on the flood risk listSN4 8BJ: not on the flood risk listSN4 8BS: not on the flood risk listSN4 8DA: not on the flood risk listSN4 8DJ: not on the flood risk listSN4 8DQ: not on the flood risk listSN4 8DS: not on the flood risk listSN4 8DT: not on the flood risk listSN4 8DU: not on the flood risk listSN4 8DW: not on the flood risk listSN4 8DX: not on the flood risk listSN4 8DY: not on the flood risk listSN4 8DZ: not on the flood risk listSN4 8EA: not on the flood risk listSN4 8EB: not on the flood risk listSN4 8EF: not on the flood risk listSN4 8EG: not on the flood risk listSN4 8EH: not on the flood risk listSN4 8EQ: not on the flood risk listSN4 8ER: not on the flood risk listSN4 8ES: not on the flood risk listSN4 8ET: not on the flood risk listSN4 8EU: not on the flood risk listSN4 8EX: not on the flood risk listSN4 8FB: not on the flood risk listSN4 8FD: not on the flood risk listSN4 8FF: not on the flood risk listSN4 8FH: not on the flood risk listSN4 8FJ: not on the flood risk listSN4 8FR: not on the flood risk listSN4 8FX: not on the flood risk listSN4 8HA: not on the flood risk listSN4 8HB: not on the flood risk listSN4 8HL: not on the flood risk listSN4 8HN: not on the flood risk listSN4 8JA: not on the flood risk listSN4 8JB: not on the flood risk listSN4 8JN: not on the flood risk listSN4 8JU: not on the flood risk listSN4 8JW: not on the flood risk listSN4 8JX: not on the flood risk listSN4 8LH: not on the flood risk listSN4 8LJ: not on the flood risk listSN4 8LL: not on the flood risk listSN4 8LP: not on the flood risk listSN4 8LQ: not on the flood risk listSN4 8LT: not on the flood risk listSN4 8LX: not on the flood risk listSN4 8NE: not on the flood risk listSN4 8QA: not on the flood risk listSN4 8QD: not on the flood risk listSN4 8QF: not on the flood risk listSN4 8QP: not on the flood risk listSN4 8QS: not on the flood risk listSN4 8QT: not on the flood risk listSN4 8SY: not on the flood risk listSN4 9AA: not on the flood risk listSN4 9AB: not on the flood risk listSN4 9AD: not on the flood risk listSN4 9AF: not on the flood risk listSN4 9AH: not on the flood risk listSN4 9AJ: not on the flood risk listSN4 9AL: not on the flood risk listSN4 9AN: not on the flood risk listSN4 9AU: not on the flood risk listSN4 9AY: not on the flood risk listSN4 9BA: not on the flood risk listSN4 9BE: not on the flood risk listSN4 9BH: not on the flood risk listSN4 9BJ: not on the flood risk listSN4 9BN: not on the flood risk listSN4 9BQ: not on the flood risk listSN4 9BS: not on the flood risk listSN4 9BZ: not on the flood risk listSN4 9DH: not on the flood risk listSN4 9DL: not on the flood risk listSN4 9DN: not on the flood risk listSN4 9DP: not on the flood risk listSN4 9DU: not on the flood risk listSN4 9DY: not on the flood risk listSN4 9ED: not on the flood risk listSN4 9EE: not on the flood risk listSN4 9EJ: not on the flood risk listSN4 9EL: not on the flood risk listSN4 9ET: not on the flood risk listSN4 9EU: not on the flood risk listSN4 9EW: not on the flood risk listSN4 9EY: not on the flood risk listSN4 9EZ: not on the flood risk listSN4 9HG: not on the flood risk listSN4 9HP: not on the flood risk listSN4 9HT: not on the flood risk listSN4 9HW: not on the flood risk listSN4 9HX: not on the flood risk listSN4 9JD: not on the flood risk listSN4 9JF: not on the flood risk listSN4 9JG: not on the flood risk listSN4 9JR: not on the flood risk listSN4 9JS: not on the flood risk listSN4 9LE: not on the flood risk listSN4 9LJ: not on the flood risk listSN4 9LQ: not on the flood risk listSN4 9LS: not on the flood risk listSN4 9LT: not on the flood risk listSN4 9LU: not on the flood risk listSN4 9LX: not on the flood risk listSN4 9LY: not on the flood risk listSN4 9LZ: not on the flood risk listSN4 9NA: not on the flood risk listSN4 9NB: not on the flood risk listSN4 9ND: not on the flood risk listSN4 9NE: not on the flood risk listSN4 9NG: not on the flood risk listSN4 9NH: not on the flood risk listSN4 9NL: not on the flood risk listSN4 9NN: not on the flood risk listSN4 9NP: not on the flood risk listSN4 9NR: not on the flood risk listSN4 9NU: not on the flood risk listSN4 9NX: not on the flood risk listSN4 9PA: not on the flood risk listSN4 9PB: not on the flood risk listSN4 9PF: not on the flood risk listSN4 9PG: not on the flood risk listSN4 9PH: not on the flood risk listSN4 9PJ: not on the flood risk listSN4 9PL: not on the flood risk listSN4 9PN: not on the flood risk listSN4 9PQ: not on the flood risk listSN4 9PS: not on the flood risk listSN4 9PU: not on the flood risk listSN4 9PW: not on the flood risk listSN4 9PX: not on the flood risk listSN4 9QB: not on the flood risk listSN4 9QD: not on the flood risk listSN4 9QE: not on the flood risk listSN4 9QF: not on the flood risk listSN4 9QG: not on the flood risk listSN4 9QL: not on the flood risk listSN4 9QN: not on the flood risk listSN4 9QP: not on the flood risk listSN4 9QS: not on the flood risk listSN4 9QT: not on the flood risk listSN4 9QU: not on the flood risk listSN4 9QW: not on the flood risk listSN4 9SB: not on the flood risk listSN4 9SE: not on the flood risk listSN4 9SF: not on the flood risk listSN4 9SG: not on the flood risk listSN4 0AR: low flood risk at worstSN4 0SN: low flood risk at worstSN4 7SA: low flood risk at worstSN4 8QR: low flood risk at worstSN4 9AT: low flood risk at worstSN4 9HE: low flood risk at worstSN4 9DT: low flood risk at worstSN4 9LW: low flood risk at worstSN4 9NF: low flood risk at worstSN4 9NW: low flood risk at worstSN4 0RT: medium flood risk at worstSN4 0SA: medium flood risk at worstSN4 9AR: medium flood risk at worstSN4 9QJ: medium flood risk at worstSN4 0AB: high flood riskSN4 0AU: high flood riskSN4 0HX: high flood riskSN4 0SW: high flood riskSN4 0UY: high flood riskSN4 7RX: high flood riskSN4 9DA: high flood risk Royal Wootton BassettSwindonWroughtonChiseldonWanborough 5 postcodes at high or medium risk, outlined: this goes to SN4 9DA, the one with most homes and businesses at high risk5 postcodes at high or medium risk Map of every postcode in SN4, by flood risk Of the 916 postcodes in SN4 that ONS places, 7 have a home or business at high risk, 8 are at medium risk at worst, 11 are at low risk at worst and 890 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: Royal Wootton Bassett, Swindon, Wroughton, Chiseldon. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 5 km. A346 Royal Wootton BassettSwindonWroughtonChiseldon
  • A home or business at high risk: 7
  • At medium risk at worst: 8
  • At low risk at worst: 11
  • At very low risk only: 0
  • Not on the at-risk list: 890
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 916 postcodes in SN4 that ONS places, 7 have a home or business at high risk, 8 are at medium risk at worst, 11 are at low risk at worst and 890 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. A dashed outline shows where 5 or more lie within 150 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

The middle of its postcodes: latitude 51.5305, longitude -1.8338. Open this area on OpenStreetMap

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

The postcodes at high risk

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

SN4 0HX3 at high riskSN4 7RX3 at high riskSN4 0SW3 at high riskSN4 9DA2 at high riskSN4 0AB1 at high riskSN4 0AU1 at high riskSN4 0UY1 at high risk

Where the postcodes at high or medium risk lie together

  • 5 postcodes at high or medium risk, outlined on the map. SN4 9DA, is the one with most homes and businesses at high risk.

What broadband can you get in SN4?

Ofcom reports on 795 of the 916 postcodes in SN4. At 613 of them every home and business can get gigabit broadband, and at 15 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit613 of 795
Postcodes where every home can get superfast667 of 795
Postcodes where some cannot get decent broadband15 of 795

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

Is SN4 at risk of flooding?

26 of the 916 postcodes in SN4 have a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts 58 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 26 of 916 postcodes High: 14Medium: 44Low: 79Very low: 1

High: 3.3% or more a year (1 in 30). Medium: 1% to 3.3% a year. Low: 0.1% to 1% a year. Very low: under 0.1% a year (1 in 1,000). Each band is the chance of flooding in any one year.

Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.

Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it

What do homes sell for in SN4?

Homes in SN4 sold for a typical £322,000 in the 12 months to August 2026, across 351 sales, down 4.7% on the 12 months before, HM Land Registry's figures show.

£322,000 typical price, the 12 months to August 2026
12 months to August 2025
£338,000
12 months to August 2026
£322,000

▼ down 4.7% on the 12 months before

Detached£520,000 105 sales
Semi-detached£321,000 121 sales
Terraced£278,000 89 sales
Flat or maisonette£159,000 36 sales

Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.

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 SN4

Pick a sector, then a postcode. A sector is the district plus the next digit.

SN4 0254 postcodesSN4 484 postcodesSN4 7193 postcodesSN4 8201 postcodesSN4 9184 postcodes
UK postcode format explained

Places in SN4

Towns and villages with postcodes in SN4, and how many each has here.

Royal Wootton Bassett postcodes,395Wroughton postcodes,172Chiseldon postcodes,56Wanborough postcodes,55Swindon postcodes,2

Who covers SN4

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • Chippenham519
  • East Wiltshire396
  • Swindon South1

Police force areas

  • Wiltshire916

Next to SN4

SN3 postcode district SN5 postcode district All SN districts Royal Wootton Bassett postcodes

"Next to" is by number: the districts before and after SN4 in the SN area.

Check a postcode

Something wrong on this page? Report an error and we will check it against the source.