HP4 postcode district: Berkhamsted and around
HP4 is a postcode district mostly in Hertfordshire, with 737 postcodes in use in 4 sectors. It has postcodes in Berkhamsted. It is split between 3 councils: Dacorum (712 postcodes), Buckinghamshire (23) and Central Bedfordshire (2). 712 are in Hertfordshire. ONS lists no county for the other 25.
- Postcodes in use
- 737
- Sectors
- 4
- Councils
- 3 councils
- Places
- Berkhamsted
Source: ONS Postcode Directory, August 2026, loaded 20 October 2026.
Every postcode in HP4, by gigabit broadband
- No home or business can get gigabit: 207
- Some can get gigabit: 153
- Every home and business can get gigabit: 366
- Ofcom gives no figure: 11
- Outline: where 5 or more postcodes without gigabit lie together
Of the 737 postcodes in HP4 that ONS places, 207 have no home or business that can get gigabit, 153 have some that can, 366 can all get it and 11 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 51.7680, longitude -0.5690. 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
207 postcodes here have no gigabit. These are the 12 first in postcode order.
Where the postcodes without gigabit lie together
- 25 postcodes without gigabit, outlined on the map. HP4 2DH, is the one nearest the middle of them.
- 15 postcodes without gigabit, outlined on the map. HP4 2QY, is the one nearest the middle of them.
- 11 postcodes without gigabit, outlined on the map. HP4 1RW, is the one nearest the middle of them.
- 11 postcodes without gigabit, outlined on the map. HP4 2GR, is the one nearest the middle of them.
- 8 postcodes without gigabit, outlined on the map. HP4 3YT, is the one nearest the middle of them.
- 7 postcodes without gigabit, outlined on the map. HP4 2PH, is the one nearest the middle of them.
What broadband can you get in HP4?
Ofcom reports on 726 of the 737 postcodes in HP4. At 366 of them every home and business can get gigabit broadband, and at 8 some cannot get decent broadband (10 Mbit/s).
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 HP4 at risk of flooding?
27 of the 737 postcodes in HP4 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 62 homes and businesses in an area at high or medium risk.
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.
What do homes sell for in HP4?
Homes in HP4 sold for a typical £720,000 in the 12 months to September 2026, across 297 sales, up 15.2% on the 12 months before, HM Land Registry's figures show.
- Detached £1,050,000 95 sales
- Semi-detached £687,500 70 sales
- Terraced £590,000 77 sales
- Flat or maisonette £360,000 55 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 HP4
Pick a sector, then a postcode. A sector is the district plus the next digit.
UK postcode format explainedPlaces in HP4
Towns and villages with postcodes in HP4, and how many each has here.
Who covers HP4
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
- Harpenden and Berkhamsted712
- Aylesbury19
- Chesham and Amersham2
- Luton South and South Bedfordshire2
- Mid Buckinghamshire2
Police force areas
- Hertfordshire712
- Thames Valley23
- Bedfordshire2
Next to HP4
"Next to" is by number: the districts before and after HP4 in the HP 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.
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