AL6 postcode district: Woolmer Green and around, Hertfordshire

AL6 is a postcode district in Hertfordshire, with 506 postcodes in use in 2 sectors. It has postcodes in Woolmer Green, Welwyn and Welwyn Garden City. It is split between 4 councils: Welwyn Hatfield (391 postcodes), East Hertfordshire (75), North Hertfordshire (38) and 1 other.

Postcodes in use: 506
Sectors: 2
Councils: 4 councils
Places: 3 places

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

Every postcode in AL6, and which are new since 2020

New since 2020: 3
In use before 2020: 503

Of the 506 postcodes in AL6 that ONS places, 3 are new since 2020 and 503 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. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

The middle of its postcodes: latitude 51.8322, longitude -0.1998. 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; when each came into use: the same directory; 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 3 newest postcodes

AL6 0FNFebruary 2022 AL6 9UNApril 2021 AL6 9LSJanuary 2020

What broadband can you get in AL6?

Ofcom reports on 501 of the 506 postcodes in AL6. At 303 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit303 of 501

Postcodes where every home can get superfast449 of 501

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 AL6 at risk of flooding?

15 of the 506 postcodes in AL6 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 15 of 506 postcodes High: 2Medium: 3Low: 49

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 AL6?

Homes in AL6 sold for a typical £700,000 in the 12 months to August 2026, across 113 sales, down 5.3% on the 12 months before, HM Land Registry's figures show.

£700,000 typical price, the 12 months to August 2026

£739,500 12 months to August 2025

▼ down 5.3% on the 12 months before

Detached £875,500 58 sales
Semi-detached £615,000 26 sales
Terraced £465,000 21 sales
Flat or maisonette £276,500 8 sales

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

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