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, by flood risk

Map of every postcode in CM19, by flood risk Of the 394 postcodes in CM19 that ONS places, 5 have a home or business at high risk, 1 are at medium risk at worst, 7 are at low risk at worst, 2 are at very low risk only and 379 are not on the Environment Agency's at-risk list. Places named: Great Parndon, Sumners & Kingsmoor. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. CM19 4AA: not on the flood risk listCM19 4AB: not on the flood risk listCM19 4AD: not on the flood risk listCM19 4AE: not on the flood risk listCM19 4AF: not on the flood risk listCM19 4AG: not on the flood risk listCM19 4AH: not on the flood risk listCM19 4AJ: not on the flood risk listCM19 4AL: not on the flood risk listCM19 4AN: not on the flood risk listCM19 4AP: not on the flood risk listCM19 4AQ: not on the flood risk listCM19 4AR: not on the flood risk listCM19 4AS: not on the flood risk listCM19 4AT: not on the flood risk listCM19 4AW: not on the flood risk listCM19 4AY: not on the flood risk listCM19 4BA: not on the flood risk listCM19 4BB: not on the flood risk listCM19 4BD: not on the flood risk listCM19 4BE: not on the flood risk listCM19 4BG: not on the flood risk listCM19 4BH: not on the flood risk listCM19 4BJ: not on the flood risk listCM19 4BP: not on the flood risk listCM19 4BQ: not on the flood risk listCM19 4BS: not on the flood risk listCM19 4BT: not on the flood risk listCM19 4BU: not on the flood risk listCM19 4BX: not on the flood risk listCM19 4BY: not on the flood risk listCM19 4DA: not on the flood risk listCM19 4DB: not on the flood risk listCM19 4DD: not on the flood risk listCM19 4DE: not on the flood risk listCM19 4DF: not on the flood risk listCM19 4DG: not on the flood risk listCM19 4DH: not on the flood risk listCM19 4DJ: not on the flood risk listCM19 4DL: not on the flood risk listCM19 4DN: not on the flood risk listCM19 4DP: not on the flood risk listCM19 4DQ: not on the flood risk listCM19 4DR: not on the flood risk listCM19 4DT: not on the flood risk listCM19 4DU: not on the flood risk listCM19 4DW: not on the flood risk listCM19 4DX: not on the flood risk listCM19 4ED: not on the flood risk listCM19 4EE: not on the flood risk listCM19 4EF: not on the flood risk listCM19 4EG: not on the flood risk listCM19 4EH: not on the flood risk listCM19 4EJ: not on the flood risk listCM19 4EL: not on the flood risk listCM19 4EN: not on the flood risk listCM19 4EP: not on the flood risk listCM19 4EQ: not on the flood risk listCM19 4ER: not on the flood risk listCM19 4ES: not on the flood risk listCM19 4ET: not on the flood risk listCM19 4EU: not on the flood risk listCM19 4EW: not on the flood risk listCM19 4FB: not on the flood risk listCM19 4FE: not on the flood risk listCM19 4FG: not on the flood risk listCM19 4FJ: not on the flood risk listCM19 4GF: not on the flood risk listCM19 4HA: not on the flood risk listCM19 4HB: not on the flood risk listCM19 4HD: not on the flood risk listCM19 4HE: not on the flood risk listCM19 4HF: not on the flood risk listCM19 4HG: not on the flood risk listCM19 4HH: not on the flood risk listCM19 4HJ: not on the flood risk listCM19 4HL: not on the flood risk listCM19 4HN: not on the flood risk listCM19 4HP: not on the flood risk listCM19 4HQ: not on the flood risk listCM19 4HR: not on the flood risk listCM19 4HS: not on the flood risk listCM19 4HT: not on the flood risk listCM19 4HW: not on the flood risk listCM19 4HX: not on the flood risk listCM19 4HY: not on the flood risk listCM19 4HZ: not on the flood risk listCM19 4JA: not on the flood risk listCM19 4JB: not on the flood risk listCM19 4JD: not on the flood risk listCM19 4JH: not on the flood risk listCM19 4JL: not on the flood risk listCM19 4JN: not on the flood risk listCM19 4JP: not on the flood risk listCM19 4JR: not on the flood risk listCM19 4JS: not on the flood risk listCM19 4JT: not on the flood risk listCM19 4JU: not on the flood risk listCM19 4JW: not on the flood risk listCM19 4JX: not on the flood risk listCM19 4JY: not on the flood risk listCM19 4JZ: not on the flood risk listCM19 4LA: not on the flood risk listCM19 4LB: not on the flood risk listCM19 4LD: not on the flood risk listCM19 4LE: not on the flood risk listCM19 4LF: not on the flood risk listCM19 4LP: not on the flood risk listCM19 4LR: not on the flood risk listCM19 4LS: not on the flood risk listCM19 4LT: not on the flood risk listCM19 4LU: not on the flood risk listCM19 4LW: not on the flood risk listCM19 4LX: not on the flood risk listCM19 4LY: not on the flood risk listCM19 4LZ: not on the flood risk listCM19 4NA: not on the flood risk listCM19 4NB: not on the flood risk listCM19 4ND: not on the flood risk listCM19 4NE: not on the flood risk listCM19 4NF: not on the flood risk listCM19 4NG: not on the flood risk listCM19 4NH: not on the flood risk listCM19 4NJ: not on the flood risk listCM19 4NL: not on the flood risk listCM19 4NN: not on the flood risk listCM19 4NP: not on the flood risk listCM19 4NQ: not on the flood risk listCM19 4NR: not on the flood risk listCM19 4NS: not on the flood risk listCM19 4NT: not on the flood risk listCM19 4NW: not on the flood risk listCM19 4NX: not on the flood risk listCM19 4NY: not on the flood risk listCM19 4NZ: not on the flood risk listCM19 4PA: not on the flood risk listCM19 4PH: not on the flood risk listCM19 4PJ: not on the flood risk listCM19 4PL: not on the flood risk listCM19 4PN: not on the flood risk listCM19 4PP: not on the flood risk listCM19 4PR: not on the flood risk listCM19 4PS: not on the flood risk listCM19 4PT: not on the flood risk listCM19 4PU: not on the flood risk listCM19 4PW: not on the flood risk listCM19 4PX: not on the flood risk listCM19 4PY: not on the flood risk listCM19 4PZ: not on the flood risk listCM19 4QA: not on the flood risk listCM19 4QB: not on the flood risk listCM19 4QD: not on the flood risk listCM19 4QF: not on the flood risk listCM19 4QG: not on the flood risk listCM19 4QH: not on the flood risk listCM19 4QJ: not on the flood risk listCM19 4QP: not on the flood risk listCM19 4QQ: not on the flood risk listCM19 4QR: not on the flood risk listCM19 4QS: not on the flood risk listCM19 4QT: not on the flood risk listCM19 4QU: not on the flood risk listCM19 4QW: not on the flood risk listCM19 4QX: not on the flood risk listCM19 4QY: not on the flood risk listCM19 4QZ: not on the flood risk listCM19 4RA: not on the flood risk listCM19 4RB: not on the flood risk listCM19 4RD: not on the flood risk listCM19 4RJ: not on the flood risk listCM19 4RL: not on the flood risk listCM19 4RN: not on the flood risk listCM19 4RP: not on the flood risk listCM19 4RR: not on the flood risk listCM19 4RS: not on the flood risk listCM19 4RT: not on the flood risk listCM19 4RW: not on the flood risk listCM19 4SD: not on the flood risk listCM19 4SE: not on the flood risk listCM19 4SF: not on the flood risk listCM19 4SG: not on the flood risk listCM19 4SH: not on the flood risk listCM19 4SJ: not on the flood risk listCM19 4SL: not on the flood risk listCM19 4SN: not on the flood risk listCM19 4SP: not on the flood risk listCM19 4SQ: not on the flood risk listCM19 4SR: not on the flood risk listCM19 4SW: not on the flood risk listCM19 4SX: not on the flood risk listCM19 5AA: not on the flood risk listCM19 5AF: not on the flood risk listCM19 5AH: not on the flood risk listCM19 5AN: not on the flood risk listCM19 5AR: not on the flood risk listCM19 5AS: not on the flood risk listCM19 5AW: not on the flood risk listCM19 5BG: not on the flood risk listCM19 5BH: not on the flood risk listCM19 5BJ: not on the flood risk listCM19 5BN: not on the flood risk listCM19 5BP: not on the flood risk listCM19 5BT: not on the flood risk listCM19 5BU: not on the flood risk listCM19 5BX: not on the flood risk listCM19 5BZ: not on the flood risk listCM19 5DA: not on the flood risk listCM19 5DB: not on the flood risk listCM19 5DD: not on the flood risk listCM19 5DE: not on the flood risk listCM19 5DG: not on the flood risk listCM19 5DH: not on the flood risk listCM19 5DJ: not on the flood risk listCM19 5DL: not on the flood risk listCM19 5DN: not on the flood risk listCM19 5DS: not on the flood risk listCM19 5DT: not on the flood risk listCM19 5DU: not on the flood risk listCM19 5DW: not on the flood risk listCM19 5DY: not on the flood risk listCM19 5EA: not on the flood risk listCM19 5EB: not on the flood risk listCM19 5ED: not on the flood risk listCM19 5EE: not on the flood risk listCM19 5EL: not on the flood risk listCM19 5EQ: not on the flood risk listCM19 5EW: not on the flood risk listCM19 5EY: not on the flood risk listCM19 5FA: not on the flood risk listCM19 5FD: not on the flood risk listCM19 5FF: not on the flood risk listCM19 5FN: not on the flood risk listCM19 5FP: not on the flood risk listCM19 5FQ: not on the flood risk listCM19 5FR: not on the flood risk listCM19 5FS: not on the flood risk listCM19 5FT: not on the flood risk listCM19 5FU: not on the flood risk listCM19 5FX: not on the flood risk listCM19 5FY: not on the flood risk listCM19 5GH: not on the flood risk listCM19 5GJ: not on the flood risk listCM19 5GL: not on the flood risk listCM19 5GU: not on the flood risk listCM19 5GX: not on the flood risk listCM19 5GY: not on the flood risk listCM19 5HB: not on the flood risk listCM19 5HD: not on the flood risk listCM19 5HE: not on the flood risk listCM19 5HF: not on the flood risk listCM19 5HG: not on the flood risk listCM19 5HH: not on the flood risk listCM19 5HJ: not on the flood risk listCM19 5HL: not on the flood risk listCM19 5HN: not on the flood risk listCM19 5HR: not on the flood risk listCM19 5HS: not on the flood risk listCM19 5HT: not on the flood risk listCM19 5HU: not on the flood risk listCM19 5HW: not on the flood risk listCM19 5HX: not on the flood risk listCM19 5HY: not on the flood risk listCM19 5HZ: not on the flood risk listCM19 5JA: not on the flood risk listCM19 5JB: not on the flood risk listCM19 5JD: not on the flood risk listCM19 5JE: not on the flood risk listCM19 5JG: not on the flood risk listCM19 5JH: not on the flood risk listCM19 5JL: not on the flood risk listCM19 5JN: not on the flood risk listCM19 5JP: not on the flood risk listCM19 5JQ: not on the flood risk listCM19 5JT: not on the flood risk listCM19 5JU: not on the flood risk listCM19 5JY: not on the flood risk listCM19 5JZ: not on the flood risk listCM19 5LA: not on the flood risk listCM19 5LB: not on the flood risk listCM19 5LD: not on the flood risk listCM19 5LE: not on the flood risk listCM19 5LG: not on the flood risk listCM19 5LH: not on the flood risk listCM19 5LJ: not on the flood risk listCM19 5LR: not on the flood risk listCM19 5LW: not on the flood risk listCM19 5NA: not on the flood risk listCM19 5NB: not on the flood risk listCM19 5ND: not on the flood risk listCM19 5NE: not on the flood risk listCM19 5NF: not on the flood risk listCM19 5NG: not on the flood risk listCM19 5NH: not on the flood risk listCM19 5NJ: not on the flood risk listCM19 5NL: not on the flood risk listCM19 5NN: not on the flood risk listCM19 5NP: not on the flood risk listCM19 5NQ: not on the flood risk listCM19 5NR: not on the flood risk listCM19 5NS: not on the flood risk listCM19 5NT: not on the flood risk listCM19 5NU: not on the flood risk listCM19 5NW: not on the flood risk listCM19 5NY: not on the flood risk listCM19 5NZ: not on the flood risk listCM19 5PA: not on the flood risk listCM19 5PB: not on the flood risk listCM19 5PD: not on the flood risk listCM19 5PE: not on the flood risk listCM19 5PF: not on the flood risk listCM19 5PG: not on the flood risk listCM19 5PH: not on the flood risk listCM19 5PJ: not on the flood risk listCM19 5PL: not on the flood risk listCM19 5PN: not on the flood risk listCM19 5PQ: not on the flood risk listCM19 5QA: not on the flood risk listCM19 5QB: not on the flood risk listCM19 5QE: not on the flood risk listCM19 5QF: not on the flood risk listCM19 5QJ: not on the flood risk listCM19 5QP: not on the flood risk listCM19 5QS: not on the flood risk listCM19 5QT: not on the flood risk listCM19 5QU: not on the flood risk listCM19 5QX: not on the flood risk listCM19 5QY: not on the flood risk listCM19 5QZ: not on the flood risk listCM19 5RA: not on the flood risk listCM19 5RB: not on the flood risk listCM19 5RD: not on the flood risk listCM19 5RE: not on the flood risk listCM19 5RF: not on the flood risk listCM19 5RH: not on the flood risk listCM19 5RJ: not on the flood risk listCM19 5RL: not on the flood risk listCM19 5RN: not on the flood risk listCM19 5RP: not on the flood risk listCM19 5RQ: not on the flood risk listCM19 5RR: not on the flood risk listCM19 5RS: not on the flood risk listCM19 5RT: not on the flood risk listCM19 5RU: not on the flood risk listCM19 5RW: not on the flood risk listCM19 5RX: not on the flood risk listCM19 5RY: not on the flood risk listCM19 5RZ: not on the flood risk listCM19 5SA: not on the flood risk listCM19 5SB: not on the flood risk listCM19 5SD: not on the flood risk listCM19 5SG: not on the flood risk listCM19 5SH: not on the flood risk listCM19 5SJ: not on the flood risk listCM19 5SL: not on the flood risk listCM19 5SN: not on the flood risk listCM19 5SQ: not on the flood risk listCM19 5SR: not on the flood risk listCM19 5SU: not on the flood risk listCM19 5SW: not on the flood risk listCM19 5TB: not on the flood risk listCM19 5TD: not on the flood risk listCM19 5TF: not on the flood risk listCM19 5TH: not on the flood risk listCM19 5TJ: not on the flood risk listCM19 5TL: not on the flood risk listCM19 5TN: not on the flood risk listCM19 5TP: not on the flood risk listCM19 5TQ: not on the flood risk listCM19 5UA: not on the flood risk listCM19 5JR: very low flood risk onlyCM19 5JW: very low flood risk onlyCM19 4HU: low flood risk at worstCM19 4LL: low flood risk at worstCM19 5DR: low flood risk at worstCM19 5EG: low flood risk at worstCM19 5FZ: low flood risk at worstCM19 5JS: low flood risk at worstCM19 5JX: low flood risk at worstCM19 5BE: medium flood risk at worstCM19 5EF: high flood riskCM19 5EH: high flood riskCM19 5EJ: high flood riskCM19 5ER: high flood riskCM19 5EX: high flood risk Great ParndonSumners & Kingsmoor Map of every postcode in CM19, by flood risk Of the 394 postcodes in CM19 that ONS places, 5 have a home or business at high risk, 1 are at medium risk at worst, 7 are at low risk at worst, 2 are at very low risk only and 379 are not on the Environment Agency's at-risk list. Places named: Great Parndon, Sumners & Kingsmoor. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. Great ParndonSumners & Kingsmoor
  • A home or business at high risk: 5
  • At medium risk at worst: 1
  • At low risk at worst: 7
  • At very low risk only: 2
  • Not on the at-risk list: 379

Of the 394 postcodes in CM19 that ONS places, 5 have a home or business at high risk, 1 are at medium risk at worst, 7 are at low risk at worst, 2 are at very low risk only and 379 are not on the Environment Agency's at-risk list.

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. 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; flood risk: Environment Agency, published 6 July 2026; 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 postcodes at high risk

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

CM19 5ER129 at high riskCM19 5EF46 at high riskCM19 5EJ27 at high riskCM19 5EX7 at high riskCM19 5EH1 at high risk

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
12 months to August 2025
£345,400
12 months to August 2026
£347,500

▲ 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

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

Postcodes in CM19

Pick a sector, then a postcode. A sector is the district plus the next digit.

CM19 4197 postcodesCM19 5197 postcodes
UK postcode format explained

Places in CM19

Towns and villages with postcodes in CM19, and how many each has here.

Harlow postcodes,321Lower Nazeing postcodes,6Hoddesdon postcodes,1

Who covers CM19

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

  • Harlow375
  • Epping Forest18
  • Broxbourne1

Police force areas

  • Essex393
  • Hertfordshire1

Next to CM19

CM18 postcode district CM20 postcode district All CM districts Harlow postcodes

"Next to" is by number: the districts before and after CM19 in the CM area.

Check a postcode

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