TN20 postcode district: Mayfield and around, East Sussex

TN20 is a postcode district in East Sussex, with 175 postcodes in use in 1 sector. It has postcodes in Mayfield and Uckfield. Its council is Wealden.

Postcodes in use
175
Sectors
1
Council
Wealden
Places
2 places

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

Every postcode in TN20, by flood risk

Map of every postcode in TN20, by flood risk Of the 175 postcodes in TN20 that ONS places, 6 have a home or business at high risk, 1 are at medium risk at worst, 5 are at low risk at worst and 163 are not on the Environment Agency's at-risk list. Places named: Mayfield, Uckfield, Heathfield, Cross in Hand, Buxted. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A26A265 TN20 6AA: not on the flood risk listTN20 6AB: not on the flood risk listTN20 6AP: not on the flood risk listTN20 6AS: not on the flood risk listTN20 6AT: not on the flood risk listTN20 6AU: not on the flood risk listTN20 6BA: not on the flood risk listTN20 6BB: not on the flood risk listTN20 6BD: not on the flood risk listTN20 6BF: not on the flood risk listTN20 6BG: not on the flood risk listTN20 6BW: not on the flood risk listTN20 6BX: not on the flood risk listTN20 6DB: not on the flood risk listTN20 6DG: not on the flood risk listTN20 6DH: not on the flood risk listTN20 6DS: not on the flood risk listTN20 6DX: not on the flood risk listTN20 6DY: not on the flood risk listTN20 6EA: not on the flood risk listTN20 6EE: not on the flood risk listTN20 6EJ: not on the flood risk listTN20 6EL: not on the flood risk listTN20 6ER: not on the flood risk listTN20 6ES: not on the flood risk listTN20 6ET: not on the flood risk listTN20 6EU: not on the flood risk listTN20 6HA: not on the flood risk listTN20 6HH: not on the flood risk listTN20 6HJ: not on the flood risk listTN20 6HN: not on the flood risk listTN20 6HP: not on the flood risk listTN20 6HQ: not on the flood risk listTN20 6HR: not on the flood risk listTN20 6HU: not on the flood risk listTN20 6HX: not on the flood risk listTN20 6HY: not on the flood risk listTN20 6JA: not on the flood risk listTN20 6JB: not on the flood risk listTN20 6JD: not on the flood risk listTN20 6JG: not on the flood risk listTN20 6JH: not on the flood risk listTN20 6JJ: not on the flood risk listTN20 6JL: not on the flood risk listTN20 6JN: not on the flood risk listTN20 6JS: not on the flood risk listTN20 6JT: not on the flood risk listTN20 6JU: not on the flood risk listTN20 6JX: not on the flood risk listTN20 6LA: not on the flood risk listTN20 6LB: not on the flood risk listTN20 6LD: not on the flood risk listTN20 6LE: not on the flood risk listTN20 6LF: not on the flood risk listTN20 6LG: not on the flood risk listTN20 6LJ: not on the flood risk listTN20 6NB: not on the flood risk listTN20 6ND: not on the flood risk listTN20 6NE: not on the flood risk listTN20 6NG: not on the flood risk listTN20 6NH: not on the flood risk listTN20 6NJ: not on the flood risk listTN20 6NL: not on the flood risk listTN20 6NN: not on the flood risk listTN20 6NP: not on the flood risk listTN20 6NQ: not on the flood risk listTN20 6NR: not on the flood risk listTN20 6NS: not on the flood risk listTN20 6NT: not on the flood risk listTN20 6NU: not on the flood risk listTN20 6NX: not on the flood risk listTN20 6PA: not on the flood risk listTN20 6PJ: not on the flood risk listTN20 6PN: not on the flood risk listTN20 6PP: not on the flood risk listTN20 6PR: not on the flood risk listTN20 6PS: not on the flood risk listTN20 6PT: not on the flood risk listTN20 6PU: not on the flood risk listTN20 6PW: not on the flood risk listTN20 6PX: not on the flood risk listTN20 6PY: not on the flood risk listTN20 6QA: not on the flood risk listTN20 6QB: not on the flood risk listTN20 6RA: not on the flood risk listTN20 6RB: not on the flood risk listTN20 6RD: not on the flood risk listTN20 6RG: not on the flood risk listTN20 6RL: not on the flood risk listTN20 6RN: not on the flood risk listTN20 6RS: not on the flood risk listTN20 6TA: not on the flood risk listTN20 6TB: not on the flood risk listTN20 6TD: not on the flood risk listTN20 6TJ: not on the flood risk listTN20 6TS: not on the flood risk listTN20 6TU: not on the flood risk listTN20 6TX: not on the flood risk listTN20 6TY: not on the flood risk listTN20 6TZ: not on the flood risk listTN20 6UB: not on the flood risk listTN20 6UH: not on the flood risk listTN20 6UL: not on the flood risk listTN20 6UN: not on the flood risk listTN20 6UP: not on the flood risk listTN20 6UR: not on the flood risk listTN20 6WX: not on the flood risk listTN20 6EG: low flood risk at worstTN20 6JR: low flood risk at worstTN20 6NF: low flood risk at worstTN20 6RJ: low flood risk at worstTN20 6RQ: low flood risk at worstTN20 6RE: medium flood risk at worstTN20 6EH: high flood riskTN20 6LL: high flood riskTN20 6RF: high flood riskTN20 6RH: high flood riskTN20 6RP: high flood riskTN20 6RR: high flood risk MayfieldUckfieldHeathfieldCross in HandBuxted Map of every postcode in TN20, by flood risk Of the 175 postcodes in TN20 that ONS places, 6 have a home or business at high risk, 1 are at medium risk at worst, 5 are at low risk at worst and 163 are not on the Environment Agency's at-risk list. Places named: Mayfield, Uckfield, Heathfield, Buxted. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 5 km. A26A265 MayfieldUckfieldHeathfieldBuxted
  • A home or business at high risk: 6
  • At medium risk at worst: 1
  • At low risk at worst: 5
  • At very low risk only: 0
  • Not on the at-risk list: 163

Of the 175 postcodes in TN20 that ONS places, 6 have a home or business at high risk, 1 are at medium risk at worst, 5 are at low risk at worst and 163 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.

The middle of its postcodes: latitude 51.0168, longitude 0.2503. 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.

TN20 6LL6 at high riskTN20 6EH2 at high riskTN20 6RH1 at high riskTN20 6RF1 at high riskTN20 6RP1 at high riskTN20 6RR1 at high risk

What broadband can you get in TN20?

Ofcom reports on 173 of the 175 postcodes in TN20. At 72 of them every home and business can get gigabit broadband, and at 5 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit72 of 173
Postcodes where every home can get superfast144 of 173
Postcodes where some cannot get decent broadband5 of 173

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 TN20 at risk of flooding?

12 of the 175 postcodes in TN20 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 16 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 12 of 175 postcodes High: 12Medium: 4Low: 9

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 TN20?

Homes in TN20 sold for a typical £525,000 in the 12 months to August 2026, across 43 sales, down 0.9% on the 12 months before, HM Land Registry's figures show.

£525,000 typical price, the 12 months to August 2026
12 months to August 2025
£530,000
12 months to August 2026
£525,000

▼ down 0.9% on the 12 months before

Detached£685,000 19 sales
Semi-detached£440,000 12 sales
Terraced£265,000 5 sales
Flat or maisonette£265,000 7 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 TN20

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

TN20 6175 postcodes
UK postcode format explained

Places in TN20

Towns and villages with postcodes in TN20, and how many each has here.

Mayfield postcodes,92Uckfield postcodes,2

Who covers TN20

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

  • Sussex Weald173
  • East Grinstead and Uckfield2

Police force areas

  • Sussex175

Next to TN20

TN19 postcode district TN21 postcode district All TN districts Mayfield postcodes

"Next to" is by number: the districts before and after TN20 in the TN area.

Check a postcode

Something wrong on this page? Report an error and we will check it against the source.