Welham Green

Welham Green is covered by postcode districts AL9 and AL10. It is in the Welwyn Hatfield council area, Hertfordshire.

Typical price £505,000 Homes sold in Welham Green, last 12 months. ▼ 2.5% on the year before Gigabit broadband 67 of 94 postcodes where every home and business can get it Flooding Some at high risk 2 of 94 postcodes have a home or business in an area at risk; 3 homes and businesses at high or medium risk Schools 2 2 primary schools at its postcodes

Every postcode in Welham Green, by flood risk

Map of every postcode in Welham Green, by flood risk Of the 94 postcodes in Welham Green that ONS places, 1 have a home or business at high risk, 1 are at low risk at worst and 92 are not on the Environment Agency's at-risk list. Places named: Welham Green. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A1000A1001 AL10 8TQ: not on the flood risk listAL10 8XB: not on the flood risk listAL9 5SB: not on the flood risk listAL9 7DF: not on the flood risk listAL9 7DG: not on the flood risk listAL9 7DH: not on the flood risk listAL9 7DJ: not on the flood risk listAL9 7DL: not on the flood risk listAL9 7DN: not on the flood risk listAL9 7DQ: not on the flood risk listAL9 7DS: not on the flood risk listAL9 7DU: not on the flood risk listAL9 7DW: not on the flood risk listAL9 7DY: not on the flood risk listAL9 7DZ: not on the flood risk listAL9 7EA: not on the flood risk listAL9 7EB: not on the flood risk listAL9 7ED: not on the flood risk listAL9 7EE: not on the flood risk listAL9 7EL: not on the flood risk listAL9 7EW: not on the flood risk listAL9 7EX: not on the flood risk listAL9 7FA: not on the flood risk listAL9 7HB: not on the flood risk listAL9 7HF: not on the flood risk listAL9 7HJ: not on the flood risk listAL9 7HN: not on the flood risk listAL9 7HR: not on the flood risk listAL9 7HT: not on the flood risk listAL9 7HX: not on the flood risk listAL9 7HZ: not on the flood risk listAL9 7JA: not on the flood risk listAL9 7JB: not on the flood risk listAL9 7JE: not on the flood risk listAL9 7JL: not on the flood risk listAL9 7LD: not on the flood risk listAL9 7LE: not on the flood risk listAL9 7LF: not on the flood risk listAL9 7LG: not on the flood risk listAL9 7LH: not on the flood risk listAL9 7LJ: not on the flood risk listAL9 7LL: not on the flood risk listAL9 7LN: not on the flood risk listAL9 7LP: not on the flood risk listAL9 7LQ: not on the flood risk listAL9 7LR: not on the flood risk listAL9 7LS: not on the flood risk listAL9 7LT: not on the flood risk listAL9 7LU: not on the flood risk listAL9 7LW: not on the flood risk listAL9 7LY: not on the flood risk listAL9 7LZ: not on the flood risk listAL9 7NA: not on the flood risk listAL9 7NB: not on the flood risk listAL9 7ND: not on the flood risk listAL9 7NE: not on the flood risk listAL9 7NF: not on the flood risk listAL9 7NG: not on the flood risk listAL9 7NH: not on the flood risk listAL9 7NJ: not on the flood risk listAL9 7NL: not on the flood risk listAL9 7NN: not on the flood risk listAL9 7NP: not on the flood risk listAL9 7NR: not on the flood risk listAL9 7NS: not on the flood risk listAL9 7NT: not on the flood risk listAL9 7NU: not on the flood risk listAL9 7NW: not on the flood risk listAL9 7NX: not on the flood risk listAL9 7NY: not on the flood risk listAL9 7NZ: not on the flood risk listAL9 7PA: not on the flood risk listAL9 7PB: not on the flood risk listAL9 7PD: not on the flood risk listAL9 7PE: not on the flood risk listAL9 7PG: not on the flood risk listAL9 7PH: not on the flood risk listAL9 7PJ: not on the flood risk listAL9 7PL: not on the flood risk listAL9 7PN: not on the flood risk listAL9 7PP: not on the flood risk listAL9 7PQ: not on the flood risk listAL9 7PR: not on the flood risk listAL9 7PS: not on the flood risk listAL9 7PT: not on the flood risk listAL9 7PU: not on the flood risk listAL9 7PW: not on the flood risk listAL9 7PX: not on the flood risk listAL9 7PY: not on the flood risk listAL9 7PZ: not on the flood risk listAL9 7QA: not on the flood risk listAL9 7YZ: not on the flood risk listAL9 7SW: low flood risk at worstAL9 7PF: high flood risk Welham Green Map of every postcode in Welham Green, by flood risk Of the 94 postcodes in Welham Green that ONS places, 1 have a home or business at high risk, 1 are at low risk at worst and 92 are not on the Environment Agency's at-risk list. Places named: Welham Green. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A1000 Welham Green
  • A home or business at high risk: 1
  • At medium risk at worst: 0
  • At low risk at worst: 1
  • At very low risk only: 0
  • Not on the at-risk list: 92

Of the 94 postcodes in Welham Green that ONS places, 1 have a home or business at high risk, 1 are at low risk at worst and 92 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 51.7354, longitude -0.2163. 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.

AL9 7PF3 at high risk

What is it like to live in Welham Green?

Homes sold for a typical £505,000 in the 12 months to August 2026, down 2.5% on the 12 months before. At 67 of the 94 postcodes Ofcom reports on, every home and business can get gigabit broadband. The Environment Agency counts 3 homes and businesses at high or medium risk of flooding from rivers or the sea, at 2 of its 94 postcodes. It has 2 primary schools at its postcodes. The nearest GP practice is Potterells Medical Centre, 1.1 km from the middle. The nearest railway station is Welham Green, 400 metres 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 Welham Green?

Homes in Welham Green sold for a typical £505,000 in the 12 months to August 2026, across 33 sales, down 2.5% on the 12 months before, HM Land Registry's figures show.

£505,000 typical price, the 12 months to August 2026
12 months to August 2025
£518,000
12 months to August 2026
£505,000

▼ down 2.5% on the 12 months before

Detached 3 sales, too few to price
Semi-detached£512,500 16 sales
Terraced£482,500 12 sales
Flat or maisonette 2 sales, too few to price

Across the whole AL9 district, Welham Green's main postcode district: a typical £580,000.

Sales at the postcodes ONS places in Welham Green: 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 Welham Green?

1 of the 94 postcodes now in use in Welham Green came into use in January 2020 or later, ONS says. In the 12 months to August 2025, 0 of the 29 homes sold in Welham Green were newly built (0%), HM Land Registry's records show; across the AL9 district, 0%.

The newest postcodes

AL9 7EXsince September 2023

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 Welham GreenAcross the AL9 district
The 12 months to August 2026 0 of 33 (0%) 0 of 104 (0%)
The 12 months to August 2025 0 of 29 (0%) 0 of 125 (0%)

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 Welham Green?

Ofcom reports on 94 of the 94 postcodes in Welham Green. At 67 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit67 of 94
Postcodes where every home can get superfast83 of 94

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 Welham Green at risk of flooding?

2 of the 94 postcodes in Welham Green 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 3 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 2 of 94 postcodes High: 3Low: 3

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 Welham Green?

The primary schools are at the postcodes in Welham Green. 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 Welham Green?

The nearest railway station to the centre point of the postcodes in Welham Green is Welham Green Rail Station, 400 m away in a straight line.

  • Welham Green Rail Station Railway station 400 mWalk
  • Brookmans Park Rail Station Railway station 1.8 kmCycle
  • Hatfield (Herts) Rail Station Railway station 3.2 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 Welham Green?

There is no GP practice at the postcodes in Welham Green. These are the nearest to its middle, in a straight line. 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 Welham Green safe? Crime recorded around it

Police.uk records 512 crimes and reports of anti-social behaviour within a mile of the middle of the postcodes in Welham Green 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. 36 September 2025
  2. 40 October 2025
  3. 45 November 2025
  4. 44 December 2025
  5. 36 January 2026
  6. 42 February 2026
  7. 41 March 2026
  8. 34 April 2026
  9. 52 May 2026
  10. 52 June 2026
  11. 48 July 2026
  12. 42 August 2026

By kind, over the 12 months

Violence and sexual offences188 reports
Anti-social behaviour132 reports
Criminal damage and arson56 reports
Other theft36 reports
Vehicle crime30 reports
Burglary19 reports
Drugs18 reports
Public order14 reports

Also: other crime 11, possession of weapons 4, bicycle theft 2, theft from the person 1, robbery 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 Welham Green?

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 94 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 Welham Green

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

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

Welham Green postcodes

94 postcodes in use in Welham Green, by district:

AL9 postcode district,92 postcodesAL10 postcode district,2 postcodes

Those districts are all in the AL postcode area.

Check a Welham Green 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 Welham Green

With the typical price of a home in each, to set beside Welham Green's £505,000. Distances are straight lines between the middles of each place's postcodes.

Brookmans Park2.4 km, £937,500Hatfield3.0 km, £365,000Potters Bar4.8 km, £590,000London Colney5.7 km, £416,250Shenley6.7 km, £588,000Cuffley7.3 km, £680,000Welwyn Garden City7.4 km, £420,000St Albans7.7 km, £595,750 All places A to Z

Questions about Welham Green

What is it like to live in Welham Green?
Homes sold for a typical £505,000 in the 12 months to August 2026, down 2.5% on the 12 months before. At 67 of the 94 postcodes Ofcom reports on, every home and business can get gigabit broadband. The Environment Agency counts 3 homes and businesses at high or medium risk of flooding from rivers or the sea, at 2 of its 94 postcodes. It has 2 primary schools at its postcodes. The nearest GP practice is Potterells Medical Centre, 1.1 km from the middle. The nearest railway station is Welham Green, 400 metres 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 Welham Green?
Welham Green is covered by postcode districts AL9 and AL10, across 94 postcodes in use. Source: ONS Postcode Directory.
Which council is Welham Green in?
Welham Green is in the Welwyn Hatfield council area, and Hertfordshire is its county council. Source: ONS Postcode Directory.
Who is the MP for Welham Green?
Welham Green 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 Welham Green?
Homes in Welham Green sold for a typical £505,000 in the 12 months to August 2026, across 33 sales, down 2.5% on the 12 months before. Source: HM Land Registry Price Paid Data, files dated 28 September 2026.
What schools are in Welham Green?
In Welham Green, primary schools at its postcodes include St Mary's Church of England VA Primary School, Welham Green and De Havilland Primary School; the nearest secondary school to the middle of its postcodes is Links Hatfield Academy, 1.8 km away in a straight line. Source: Department for Education, Get Information about Schools, read 17 October 2026.
Does Welham Green have a railway station?
Yes: Welham Green is 400 metres from the centre point of the postcodes in Welham Green, in a straight line. Source: Department for Transport, NaPTAN, read 17 October 2026.
What broadband can you get in Welham Green?
Ofcom reports on 94 of the 94 postcodes in Welham Green. At 67 of them every home and business can get gigabit broadband. Source: Ofcom, Connected Nations, Spring 2026.
Is Welham Green at risk of flooding?
2 of the 94 postcodes in Welham Green 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 3 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 Welham Green?
1 of the 94 postcodes now in use in Welham Green came into use in January 2020 or later, ONS says. In the 12 months to August 2025, 0 of the 29 homes sold in Welham Green were newly built (0%), HM Land Registry's records show; across the AL9 district, 0%. Source: ONS Postcode Directory and HM Land Registry Price Paid Data.

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