HP8 postcode district: Chalfont St Giles and around

HP8 is a postcode district in England, with 220 postcodes in use in 1 sector. It has postcodes in Chalfont St Giles, Little Chalfont and Amersham. It is split between 2 councils: Buckinghamshire (219 postcodes) and Three Rivers (1). 1 of its 220 postcodes is in Hertfordshire. ONS lists no county for the other 219.

Postcodes in use: 220
Sectors: 1
Councils: 2 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 HP8, and which are new since 2020

New since 2020: 4
In use before 2020: 216

Of the 220 postcodes in HP8 that ONS places, 4 are new since 2020 and 216 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 51.6381, longitude -0.5696. 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 4 newest postcodes

HP8 4FNFebruary 2025 HP8 4FPOctober 2024 HP8 4FJJune 2021 HP8 4FLApril 2021

What broadband can you get in HP8?

Ofcom reports on 217 of the 220 postcodes in HP8. At 79 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit79 of 217

Postcodes where every home can get superfast188 of 217

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 HP8 at risk of flooding?

6 of the 220 postcodes in HP8 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 20 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 6 of 220 postcodes High: 20Low: 13

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 HP8?

Homes in HP8 sold for a typical £730,000 in the 12 months to August 2026, across 71 sales, down 3.9% on the 12 months before, HM Land Registry's figures show.

£730,000 typical price, the 12 months to August 2026

£760,000 12 months to August 2025

▼ down 3.9% on the 12 months before

Detached £1,000,000 42 sales
Semi-detached £610,000 15 sales
Terraced £500,000 10 sales
Flat or maisonette 4 sales, too few to price

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