Welwyn

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

Typical price £470,000 Homes sold in Welwyn, last 12 months. ▼ 10.5% on the year before Gigabit broadband 118 of 140 postcodes where every home and business can get it Flooding Some at high risk 12 of 141 postcodes have a home or business in an area at risk; 5 homes and businesses at high or medium risk Schools 1 1 primary school at its postcodes

Every postcode in Welwyn, by flood risk

Map of every postcode in Welwyn, by flood risk Of the 141 postcodes in Welwyn that ONS places, 1 have a home or business at high risk, 2 are at medium risk at worst, 9 are at low risk at worst and 129 are not on the Environment Agency's at-risk list. Places named: Welwyn. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A1(M) AL6 9AS: not on the flood risk listAL6 9AT: not on the flood risk listAL6 9AU: not on the flood risk listAL6 9DF: not on the flood risk listAL6 9DJ: not on the flood risk listAL6 9DL: not on the flood risk listAL6 9DN: not on the flood risk listAL6 9DP: not on the flood risk listAL6 9DQ: not on the flood risk listAL6 9DS: not on the flood risk listAL6 9DW: not on the flood risk listAL6 9DY: not on the flood risk listAL6 9DZ: not on the flood risk listAL6 9ED: not on the flood risk listAL6 9EE: not on the flood risk listAL6 9EG: not on the flood risk listAL6 9EH: not on the flood risk listAL6 9EJ: not on the flood risk listAL6 9EL: not on the flood risk listAL6 9EN: not on the flood risk listAL6 9EP: not on the flood risk listAL6 9ER: not on the flood risk listAL6 9ES: not on the flood risk listAL6 9EY: not on the flood risk listAL6 9EZ: not on the flood risk listAL6 9FB: not on the flood risk listAL6 9FD: not on the flood risk listAL6 9FE: not on the flood risk listAL6 9FH: not on the flood risk listAL6 9FJ: not on the flood risk listAL6 9FL: not on the flood risk listAL6 9FN: not on the flood risk listAL6 9FP: not on the flood risk listAL6 9FQ: not on the flood risk listAL6 9FR: not on the flood risk listAL6 9FS: not on the flood risk listAL6 9FT: not on the flood risk listAL6 9HB: not on the flood risk listAL6 9HN: not on the flood risk listAL6 9HR: not on the flood risk listAL6 9HS: not on the flood risk listAL6 9HT: not on the flood risk listAL6 9HU: not on the flood risk listAL6 9HX: not on the flood risk listAL6 9HY: not on the flood risk listAL6 9HZ: not on the flood risk listAL6 9JA: not on the flood risk listAL6 9JB: not on the flood risk listAL6 9JD: not on the flood risk listAL6 9JE: not on the flood risk listAL6 9JF: not on the flood risk listAL6 9JG: not on the flood risk listAL6 9JH: not on the flood risk listAL6 9JJ: not on the flood risk listAL6 9JL: not on the flood risk listAL6 9JN: not on the flood risk listAL6 9JP: not on the flood risk listAL6 9JQ: not on the flood risk listAL6 9JR: not on the flood risk listAL6 9JS: not on the flood risk listAL6 9JT: not on the flood risk listAL6 9JU: not on the flood risk listAL6 9JW: not on the flood risk listAL6 9JX: not on the flood risk listAL6 9JY: not on the flood risk listAL6 9JZ: not on the flood risk listAL6 9LA: not on the flood risk listAL6 9LB: not on the flood risk listAL6 9LD: not on the flood risk listAL6 9LE: not on the flood risk listAL6 9LF: not on the flood risk listAL6 9LH: not on the flood risk listAL6 9LN: not on the flood risk listAL6 9LP: not on the flood risk listAL6 9LR: not on the flood risk listAL6 9LS: not on the flood risk listAL6 9LT: not on the flood risk listAL6 9LU: not on the flood risk listAL6 9LW: not on the flood risk listAL6 9LX: not on the flood risk listAL6 9LY: not on the flood risk listAL6 9LZ: not on the flood risk listAL6 9NA: not on the flood risk listAL6 9NB: not on the flood risk listAL6 9ND: not on the flood risk listAL6 9NE: not on the flood risk listAL6 9NT: not on the flood risk listAL6 9NX: not on the flood risk listAL6 9PA: not on the flood risk listAL6 9PB: not on the flood risk listAL6 9PD: not on the flood risk listAL6 9PE: not on the flood risk listAL6 9PF: not on the flood risk listAL6 9PG: not on the flood risk listAL6 9PH: not on the flood risk listAL6 9PJ: not on the flood risk listAL6 9PL: not on the flood risk listAL6 9PN: not on the flood risk listAL6 9PP: not on the flood risk listAL6 9PQ: not on the flood risk listAL6 9PR: not on the flood risk listAL6 9PS: not on the flood risk listAL6 9PT: not on the flood risk listAL6 9PU: not on the flood risk listAL6 9PW: not on the flood risk listAL6 9PX: not on the flood risk listAL6 9PY: not on the flood risk listAL6 9PZ: not on the flood risk listAL6 9QA: not on the flood risk listAL6 9QB: not on the flood risk listAL6 9QD: not on the flood risk listAL6 9QE: not on the flood risk listAL6 9QF: not on the flood risk listAL6 9RA: not on the flood risk listAL6 9RB: not on the flood risk listAL6 9RD: not on the flood risk listAL6 9RE: not on the flood risk listAL6 9RF: not on the flood risk listAL6 9RG: not on the flood risk listAL6 9RH: not on the flood risk listAL6 9RJ: not on the flood risk listAL6 9RL: not on the flood risk listAL6 9RN: not on the flood risk listAL6 9RP: not on the flood risk listAL6 9RQ: not on the flood risk listAL6 9RR: not on the flood risk listAL6 9RS: not on the flood risk listAL6 9RW: not on the flood risk listAL6 9SB: not on the flood risk listAL6 9EA: low flood risk at worstAL6 9EF: low flood risk at worstAL6 9ET: low flood risk at worstAL6 9EU: low flood risk at worstAL6 9EX: low flood risk at worstAL6 9GS: low flood risk at worstAL6 9HA: low flood risk at worstAL6 9HQ: low flood risk at worstAL6 9NU: low flood risk at worstAL6 9NH: medium flood risk at worstAL6 9NQ: medium flood risk at worstAL6 9EQ: high flood risk Welwyn Map of every postcode in Welwyn, by flood risk Of the 141 postcodes in Welwyn that ONS places, 1 have a home or business at high risk, 2 are at medium risk at worst, 9 are at low risk at worst and 129 are not on the Environment Agency's at-risk list. Places named: Welwyn. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Welwyn
  • A home or business at high risk: 1
  • At medium risk at worst: 2
  • At low risk at worst: 9
  • At very low risk only: 0
  • Not on the at-risk list: 129

Of the 141 postcodes in Welwyn that ONS places, 1 have a home or business at high risk, 2 are at medium risk at worst, 9 are at low risk at worst and 129 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.

The middle of its postcodes: latitude 51.8295, longitude -0.2158. 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.

AL6 9EQ2 at high risk

What is it like to live in Welwyn?

Homes sold for a typical £470,000 in the 12 months to August 2026, down 10.5% on the 12 months before. 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.

Source: HM Land Registry, Ofcom, the Environment Agency, the Department for Education, NHS England and the Department for Transport, as each section of this page says. See all our data sources

What do homes cost in Welwyn?

Homes in Welwyn sold for a typical £470,000 in the 12 months to August 2026, across 29 sales, down 10.5% on the 12 months before, HM Land Registry's figures show.

£470,000 typical price, the 12 months to August 2026
12 months to August 2025
£525,000
12 months to August 2026
£470,000

▼ down 10.5% on the 12 months before

Detached£782,500 5 sales
Semi-detached£495,000 6 sales
Terraced£455,000 14 sales
Flat or maisonette 4 sales, too few to price

Across the whole AL6 district, Welwyn's main postcode district: a typical £700,000.

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 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

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 August 2025, 0 of the 54 homes sold in Welwyn were newly built (0%), HM Land Registry's records show; across the AL6 district, 4%.

The newest postcodes

AL6 9LSsince January 2020

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 August 2026 0 of 29 (0%) 0 of 113 (0%)
The 12 months to August 2025 0 of 54 (0%) 6 of 158 (4%)

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.

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026; HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021, Open Government Licence v3.0. How we use it

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, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

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, 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

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.

Primary

Secondary

Find and compare schools in England, on GOV.UK

Source: Department for Education, Get Information about Schools, read 17 October 2026, Open Government Licence v3.0. Each school opens its own record there. How we use it

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: Department for Transport, NaPTAN, read 17 October 2026, Open Government Licence v3.0. How we use it

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

Source: NHS England, Organisation Data Service (GP practices), read 17 October 2026, Open Government Licence v3.0. How we use it

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.police.uk), data to August 2026, from its download of 30 September 2026, Open Government Licence v3.0. How we use it

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?

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

Moving to Welwyn

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

Who to tell when moving house: the full list Moving house checklist

Welwyn postcodes

141 postcodes in use in Welwyn, by district:

AL6 postcode district,141 postcodes

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.

Woolmer Green2.4 km, £642,500Codicote2.6 km, £392,500Welwyn Garden City3.6 km, £420,000Knebworth4.4 km, £418,500Wheathampstead5.7 km, £630,000Hatfield7.7 km, £365,000Stevenage8.8 km, £350,000Harpenden9.5 km, £790,000 All places A to Z

Questions about Welwyn

What is it like to live in Welwyn?
Homes sold for a typical £470,000 in the 12 months to August 2026, down 10.5% on the 12 months before. 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. Source: HM Land Registry, Ofcom, the Environment Agency, the Department for Education, NHS England and the Department for Transport, as each section of this page says.
What is the postcode for Welwyn?
Welwyn is covered by postcode district AL6, across 141 postcodes in use. Source: ONS Postcode Directory.
Which council is Welwyn in?
Welwyn is in the Welwyn Hatfield council area, and Hertfordshire is its county council. Source: ONS Postcode Directory.
Who is the MP for Welwyn?
Welwyn is in the Welwyn Hatfield parliamentary constituency. Its MP is Andrew Lewin (Labour), as UK Parliament listed them on 14 October 2026. Constituency: ONS Postcode Directory.
How much are houses in Welwyn?
Homes in Welwyn sold for a typical £470,000 in the 12 months to August 2026, across 29 sales, down 10.5% on the 12 months before. Source: HM Land Registry Price Paid Data, files dated 28 September 2026.
What schools are in Welwyn?
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 in a straight line. Source: Department for Education, Get Information about Schools, read 17 October 2026.
Does Welwyn have a railway station?
The nearest railway station to the centre point of the postcodes in Welwyn is Welwyn North, 1.8 km away in a straight line. Source: Department for Transport, NaPTAN, read 17 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. Source: Ofcom, Connected Nations, Spring 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. This is long-term risk for the land, and leaves out 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 August 2025, 0 of the 54 homes sold in Welwyn were newly built (0%), HM Land Registry's records show; across the AL6 district, 4%. Source: ONS Postcode Directory and HM Land Registry Price Paid Data.

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