CM19 postcode district: Harlow and around

CM19 is a postcode district mostly in Essex, with 394 postcodes in use in 2 sectors. It has postcodes in Harlow, Lower Nazeing and Hoddesdon. It is split between 3 councils: Harlow (323 postcodes), Epping Forest (70) and East Hertfordshire (1). 393 are in Essex and 1 in Hertfordshire.

Postcodes in use: 394
Sectors: 2
Councils: 3 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 CM19, and which are new since 2020

New since 2020: 1
In use before 2020: 393

Of the 394 postcodes in CM19 that ONS places, 1 are new since 2020 and 393 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. Names in italics are council wards: we hold no town or village names here.

The middle of its postcodes: latitude 51.7594, longitude 0.0711. 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 newest postcode

CM19 5GLSeptember 2022

What broadband can you get in CM19?

Ofcom reports on 390 of the 394 postcodes in CM19. At 250 of them every home and business can get gigabit broadband, and at 3 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit250 of 390

Postcodes where every home can get superfast321 of 390

Postcodes where some cannot get decent broadband3 of 390

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 CM19 at risk of flooding?

15 of the 394 postcodes in CM19 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 212 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 15 of 394 postcodes High: 210Medium: 2Low: 33Very low: 30

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 CM19?

Homes in CM19 sold for a typical £347,500 in the 12 months to August 2026, across 155 sales, up 0.6% on the 12 months before, HM Land Registry's figures show.

£347,500 typical price, the 12 months to August 2026

£345,400 12 months to August 2025

▲ up 0.6% on the 12 months before

Detached £563,750 26 sales
Semi-detached £428,000 27 sales
Terraced £335,000 73 sales
Flat or maisonette £175,000 29 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