CM3 postcode district: South Woodham Ferrers and around, Essex

CM3 is a postcode district in Essex, with 1,588 postcodes in use in 9 sectors. It has postcodes in South Woodham Ferrers, Danbury, Hatfield Peverel and 4 more places. It is split between 4 councils: Chelmsford (1,037 postcodes), Maldon (285), Braintree (238) and 1 other.

Postcodes in use: 1,588
Sectors: 9
Councils: 4 councils
Places: 7 places

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

Every postcode in CM3, and which are new since 2020

New since 2020: 89
In use before 2020: 1,499
Outline: where 5 or more new postcodes since 2020 lie together

Of the 1,588 postcodes in CM3 that ONS places, 89 are new since 2020 and 1,499 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. A dashed outline shows where 5 or more lie within 200 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 51.7219, longitude 0.5844. 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 5 newest postcodes

CM3 9BXMarch 2026 CM3 2RLDecember 2025 CM3 6YNNovember 2025 CM3 3QWOctober 2025 CM3 6GSJuly 2025

Where the new postcodes lie together

15 new postcodes since 2020, outlined on the map. CM3 2FY, is the newest of them.
8 new postcodes since 2020, outlined on the map. CM3 2GP, is the newest of them.
8 new postcodes since 2020, outlined on the map. CM3 3QP, is the newest of them.
7 new postcodes since 2020, outlined on the map. CM3 6FA, is the newest of them.

What broadband can you get in CM3?

Ofcom reports on 1,560 of the 1,588 postcodes in CM3. At 955 of them every home and business can get gigabit broadband, and at 22 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit955 of 1,560

Postcodes where every home can get superfast1,345 of 1,560

Postcodes where some cannot get decent broadband22 of 1,560

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 CM3 at risk of flooding?

154 of the 1,588 postcodes in CM3 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 347 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 154 of 1,588 postcodes High: 251Medium: 96Low: 431Very low: 787

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 CM3?

Homes in CM3 sold for a typical £442,000 in the 12 months to August 2026, across 655 sales, down 3.9% on the 12 months before, HM Land Registry's figures show.

£442,000 typical price, the 12 months to August 2026

£460,000 12 months to August 2025

▼ down 3.9% on the 12 months before

Detached £560,000 333 sales
Semi-detached £393,000 165 sales
Terraced £325,000 105 sales
Flat or maisonette £198,750 52 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