Welwyn

Welwyn is covered by postcode district AL6. It is in the Welwyn Hatfield council area, Hertfordshire.

Every postcode in Welwyn, and which are new since 2020

Map of every postcode in Welwyn, by new since 2020 Of the 141 postcodes in Welwyn that ONS places, 1 are new since 2020 and 140 were in use before 2020. Places named: Welwyn. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A1(M) AL6 9AS: before 2020AL6 9AT: before 2020AL6 9AU: before 2020AL6 9DF: before 2020AL6 9DJ: before 2020AL6 9DL: before 2020AL6 9DN: before 2020AL6 9DP: before 2020AL6 9DQ: before 2020AL6 9DS: before 2020AL6 9DW: before 2020AL6 9DY: before 2020AL6 9DZ: before 2020AL6 9EA: before 2020AL6 9ED: before 2020AL6 9EE: before 2020AL6 9EF: before 2020AL6 9EG: before 2020AL6 9EH: before 2020AL6 9EJ: before 2020AL6 9EL: before 2020AL6 9EN: before 2020AL6 9EP: before 2020AL6 9EQ: before 2020AL6 9ER: before 2020AL6 9ES: before 2020AL6 9ET: before 2020AL6 9EU: before 2020AL6 9EX: before 2020AL6 9EY: before 2020AL6 9EZ: before 2020AL6 9FB: before 2020AL6 9FD: before 2020AL6 9FE: before 2020AL6 9FH: before 2020AL6 9FJ: before 2020AL6 9FL: before 2020AL6 9FN: before 2020AL6 9FP: before 2020AL6 9FQ: before 2020AL6 9FR: before 2020AL6 9FS: before 2020AL6 9FT: before 2020AL6 9GS: before 2020AL6 9HA: before 2020AL6 9HB: before 2020AL6 9HN: before 2020AL6 9HQ: before 2020AL6 9HR: before 2020AL6 9HS: before 2020AL6 9HT: before 2020AL6 9HU: before 2020AL6 9HX: before 2020AL6 9HY: before 2020AL6 9HZ: before 2020AL6 9JA: before 2020AL6 9JB: before 2020AL6 9JD: before 2020AL6 9JE: before 2020AL6 9JF: before 2020AL6 9JG: before 2020AL6 9JH: before 2020AL6 9JJ: before 2020AL6 9JL: before 2020AL6 9JN: before 2020AL6 9JP: before 2020AL6 9JQ: before 2020AL6 9JR: before 2020AL6 9JS: before 2020AL6 9JT: before 2020AL6 9JU: before 2020AL6 9JW: before 2020AL6 9JX: before 2020AL6 9JY: before 2020AL6 9JZ: before 2020AL6 9LA: before 2020AL6 9LB: before 2020AL6 9LD: before 2020AL6 9LE: before 2020AL6 9LF: before 2020AL6 9LH: before 2020AL6 9LN: before 2020AL6 9LP: before 2020AL6 9LR: before 2020AL6 9LT: before 2020AL6 9LU: before 2020AL6 9LW: before 2020AL6 9LX: before 2020AL6 9LY: before 2020AL6 9LZ: before 2020AL6 9NA: before 2020AL6 9NB: before 2020AL6 9ND: before 2020AL6 9NE: before 2020AL6 9NH: before 2020AL6 9NQ: before 2020AL6 9NT: before 2020AL6 9NU: before 2020AL6 9NX: before 2020AL6 9PA: before 2020AL6 9PB: before 2020AL6 9PD: before 2020AL6 9PE: before 2020AL6 9PF: before 2020AL6 9PG: before 2020AL6 9PH: before 2020AL6 9PJ: before 2020AL6 9PL: before 2020AL6 9PN: before 2020AL6 9PP: before 2020AL6 9PQ: before 2020AL6 9PR: before 2020AL6 9PS: before 2020AL6 9PT: before 2020AL6 9PU: before 2020AL6 9PW: before 2020AL6 9PX: before 2020AL6 9PY: before 2020AL6 9PZ: before 2020AL6 9QA: before 2020AL6 9QB: before 2020AL6 9QD: before 2020AL6 9QE: before 2020AL6 9QF: before 2020AL6 9RA: before 2020AL6 9RB: before 2020AL6 9RD: before 2020AL6 9RE: before 2020AL6 9RF: before 2020AL6 9RG: before 2020AL6 9RH: before 2020AL6 9RJ: before 2020AL6 9RL: before 2020AL6 9RN: before 2020AL6 9RP: before 2020AL6 9RQ: before 2020AL6 9RR: before 2020AL6 9RS: before 2020AL6 9RW: before 2020AL6 9SB: before 2020AL6 9LS: new since 2020 Welwyn Map of every postcode in Welwyn, by new since 2020 Of the 141 postcodes in Welwyn that ONS places, 1 are new since 2020 and 140 were in use before 2020. Places named: Welwyn. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Welwyn
  • New since 2020: 1
  • In use before 2020: 140

Of the 141 postcodes in Welwyn that ONS places, 1 are new since 2020 and 140 were in use before 2020.

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. New since 2020 means it came into use in January 2020 or later. No boundary is drawn.

The middle of its postcodes: latitude 51.8295, longitude -0.2158. Open this area on OpenStreetMap

Sources: ONS Postcode Directory, August 2026, loaded 20 October 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.

The newest postcode

What is it like to live in Welwyn?

Homes sold for a typical £470,000 in the 12 months to September 2026. At 118 of the 140 postcodes Ofcom reports on, every home and business can get gigabit broadband. The Environment Agency counts 5 homes and businesses at high or medium risk of flooding from rivers or the sea, at 12 of its 141 postcodes. It has 1 primary school at its postcodes. One GP practice is at its postcodes. The nearest railway station is Welwyn North, 1.8 km from the middle of its postcodes in a straight line.

We don't rate places; here are the figures so you can judge.

Sources: HM Land Registry Price Paid Data; Ofcom Connected Nations; Environment Agency flood risk; Get Information about Schools; NHS GP practices; NaPTAN. Each figure is from a section of this page, which gives its date.

What do homes cost in Welwyn?

Homes in Welwyn sold for a typical £470,000 in the 12 months to September 2026, across 31 sales, HM Land Registry's figures show. The 12 months before gave £525,000 from 52 sales: not a change larger than chance would explain, given which homes happened to sell.

£470,000 typical price, the 12 months to September 2026
£525,000 12 months to September 2025
  • Detached £781,250 6 sales
  • Semi-detached £520,000 5 sales
  • Terraced £442,500 16 sales
  • Flat or maisonette 4 sales, too few to price

Each bar is that kind's typical price, against the most expensive kind here.

Across the whole AL6 district, Welwyn's main postcode district: a typical £713,750.

Sales at the postcodes ONS places in Welwyn: 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 October 2026.

Are new homes being built in Welwyn?

1 of the 141 postcodes now in use in Welwyn came into use in January 2020 or later, ONS says. In the 12 months to September 2025, 0 of the 52 homes sold in Welwyn were newly built (0%), HM Land Registry's records show; across the AL6 district, 3%.

The newest postcodes

A new postcode is often a new street or estate, but Royal Mail also makes new postcodes when it reorganises old ones, so not every one means new homes. Only postcodes still in use are counted.

New homes among the homes sold

PeriodIn WelwynAcross the AL6 district
The 12 months to September 2026 0 of 31 (0%) 0 of 124 (0%)
The 12 months to September 2025 0 of 52 (0%) 5 of 155 (3%)

Standard sales of homes at market value that HM Land Registry marks as newly built. New homes take longer to be registered than other sales, so the latest 12 months count fewer of them than were sold. A share is given from 5 sales or more.

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; HM Land Registry Price Paid Data, files dated 28 October 2026.

What broadband can you get in Welwyn?

Ofcom reports on 140 of the 141 postcodes in Welwyn. At 118 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit118 of 140
Postcodes where every home can get superfast139 of 140

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, Connected Nations, Spring 2026, data for January 2026.

Is Welwyn at risk of flooding?

12 of the 141 postcodes in Welwyn 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 5 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 12 of 141 postcodes High: 2Medium: 3Low: 44

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 flood risk, published 6 July 2026.

Which schools are in Welwyn?

The primary schools are at the postcodes in Welwyn. There is no secondary school at its postcodes; these are the nearest to its middle. Distances are straight lines from the middle of its postcodes. Distance is not a catchment: each council sets its own admission rules. Special schools and alternative provision, which children join by referral, are not listed.

An orange bar: the school has as many pupils as places, or more (Department for Education's figures).

Find and compare schools in England, on GOV.UK

Source: Get Information about Schools, read 17 October 2026. Each school opens its own record there.

How far is the station from Welwyn?

The nearest railway station to the centre point of the postcodes in Welwyn is Welwyn North Rail Station, 1.8 km away in a straight line.

  • Welwyn North Rail Station Railway station 1.8 kmCycle
  • Welwyn Garden City Rail Station Railway station 3.3 kmCycle
  • Knebworth Rail Station Railway station 4.6 kmCycle

Straight-line distances from the centre point, not routes. Walk: under 1.2 km. Cycle: 1.2 to 5 km. Drive: further.

Straight-line distances from the middle of the postcodes, not routes. Each postcode page lists its own nearest stations and bus stops. The Department for Transport's register does not say how often services run.

Source: NaPTAN, read 17 October 2026.

Which GP surgeries are in Welwyn?

The GP practices at the postcodes in Welwyn. Each practice sets the area it takes patients from, so check with it before registering.

Find a GP on the NHS website

Sources: NHS GP practices, read 17 October 2026; Care Quality Commission, ratings of 1 October 2026.

Is Welwyn safe? Crime recorded around it

Police.uk records 379 crimes and reports of anti-social behaviour within a mile of the middle of the postcodes in Welwyn over the 12 months from September 2025 to August 2026. August 2026 is the latest month it has published. These are counts, not a rate: we hold no count of the people who live, work or pass through, so we do not say whether a place is safe.

Each month, September 2025 to August 2026

  1. 35 September 2025
  2. 28 October 2025
  3. 39 November 2025
  4. 31 December 2025
  5. 29 January 2026
  6. 31 February 2026
  7. 36 March 2026
  8. 15 April 2026
  9. 27 May 2026
  10. 29 June 2026
  11. 40 July 2026
  12. 39 August 2026

By kind, over the 12 months

Violence and sexual offences132 reports
Anti-social behaviour85 reports
Other theft64 reports
Burglary20 reports
Public order18 reports
Vehicle crime18 reports
Criminal damage and arson17 reports
Drugs7 reports

Also: other crime 7, shoplifting 6, bicycle theft 3, theft from the person 1, possession of weapons 1.

Police.uk says its locations "always represent the approximate location of a crime". Each crime is moved to the nearest of a fixed list of map points, each over a street centre, a public place or a commercial premises, chosen so that every point covers at least eight addresses or none. A mile is a wide circle: in a town it takes in the centre and its shops, where much crime is recorded.

Crime around one postcode

Source: police.uk, data to August 2026, from its download of 30 September 2026.

Who runs Welwyn?

District, borough or city council
Welwyn Hatfield
County council
Hertfordshire
Parliamentary constituency
Welwyn Hatfield
Police force area
Hertfordshire
Region
East of England
Country
England
MP
Andrew Lewin (Labour)

All 141 postcodes here share these. Wards differ: check a postcode for yours. What council am I in?

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; UK Parliament, read 14 October 2026.

Moving to Welwyn

Who to tell and what to sort out in your first week.

Welwyn postcodes

141 postcodes in use in Welwyn, by district:

That district is in the AL postcode area.

Check a Welwyn postcode

Enter a full postcode to see its ward, its flood risk, house prices in its sector and its nearest schools.

Do not know the postcode? What is my postcode?

Places near Welwyn

With the typical price of a home in each, to set beside Welwyn's £470,000. Distances are straight lines between the middles of each place's postcodes.

Quick answers about Welwyn

What is the postcode for Welwyn?
Postcode district AL6, with 141 postcodes in use. Source: ONS.
Which council is Welwyn in?
Welwyn Hatfield, with Hertfordshire as its county council. Source: ONS.
Who is the MP for Welwyn?
Andrew Lewin (Labour), for Welwyn Hatfield. Source: UK Parliament and ONS.
How much are houses in Welwyn?
A typical £470,000 in the 12 months to September 2026, from 31 sales. Source: HM Land Registry.
What schools are in Welwyn?
Primary schools at its postcodes include Welwyn St Mary's Church of England Voluntary Aided Primary School; the nearest secondary school to the middle of its postcodes is Sherrardswood School, 650 metres away. Source: Department for Education.
Does Welwyn have a railway station?
The nearest is Welwyn North station, 1.8 km from the middle of its postcodes in a straight line. Source: Department for Transport.
What broadband can you get in Welwyn?
Ofcom reports on 140 of the 141 postcodes in Welwyn. At 118 of them every home and business can get gigabit broadband. Source: Ofcom.
Is Welwyn at risk of flooding?
12 of the 141 postcodes in Welwyn 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 5 homes and businesses in an area at high or medium risk. River and sea risk for the land, not surface water. Source: Environment Agency.
Are new homes being built in Welwyn?
1 of the 141 postcodes now in use in Welwyn came into use in January 2020 or later, ONS says. In the 12 months to September 2025, 0 of the 52 homes sold in Welwyn were newly built (0%), HM Land Registry's records show; across the AL6 district, 3%. Source: ONS and HM Land Registry.

Where the facts on this page come from

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

Licences: Open Government Licence v3.0; Open Parliament Licence v3.0.

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