AL7 postcode district: Welwyn Garden City and around, Hertfordshire
AL7 is a postcode district in Hertfordshire, with 895 postcodes in use in 5 sectors. It has postcodes in Welwyn Garden City. Its council is Welwyn Hatfield.
- Postcodes in use
- 895
- Sectors
- 5
- Council
- Welwyn Hatfield
- Places
- Welwyn Garden City
Source: ONS Postcode Directory, August 2026, loaded 20 October 2026.
Every postcode in AL7, by gigabit broadband
- No home or business can get gigabit: 42
- Some can get gigabit: 52
- Every home and business can get gigabit: 749
- Ofcom gives no figure: 52
- Outline: where 5 or more postcodes without gigabit lie together
Of the 895 postcodes in AL7 that ONS places, 42 have no home or business that can get gigabit, 52 have some that can, 749 can all get it and 52 have no Ofcom figure.
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 51.7968, longitude -0.1872. Open this area on OpenStreetMap
Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; Ofcom Connected Nations, Connected Nations, Spring 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.
Postcodes without gigabit
42 postcodes here have no gigabit. These are the 12 first in postcode order.
What broadband can you get in AL7?
Ofcom reports on 843 of the 895 postcodes in AL7. At 749 of them every home and business can get gigabit broadband.
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 checkerSource: Ofcom Connected Nations, Connected Nations, Spring 2026, data for January 2026.
Is AL7 at risk of flooding?
None of the 895 postcodes in AL7 is on the Environment Agency's list of postcodes with a home or business in an area at risk of flooding from rivers or the sea.
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.
What do homes sell for in AL7?
Homes in AL7 sold for a typical £400,000 in the 12 months to September 2026, across 349 sales, HM Land Registry's figures show. The 12 months before gave £388,500 from 420 sales: not a change larger than chance would explain, given which homes happened to sell.
- Detached £622,500 24 sales
- Semi-detached £467,500 64 sales
- Terraced £415,000 159 sales
- Flat or maisonette £240,000 102 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 October 2026.
Postcodes in AL7
Pick a sector, then a postcode. A sector is the district plus the next digit.
UK postcode format explainedPlaces in AL7
Towns and villages with postcodes in AL7, and how many each has here.
Who covers AL7
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
- Welwyn Hatfield895
Police force areas
- Hertfordshire895
Next to AL7
"Next to" is by number: the districts before and after AL7 in the AL area.
Check a postcode
Where the facts on this page come from
- Office for National Statistics: ONS Postcode Directory
- Ofcom Connected Nations
- Environment Agency flood risk
- HM Land Registry Price Paid Data
Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0.
Licence: Open Government Licence v3.0.
Something wrong on this page? Report an error and we will check it against the source. All our sources