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: ONS Postcode Directory, August 2026, loaded 20 October 2026.

Every postcode in TN20, by gigabit broadband

Map of every postcode in TN20, by gigabit broadband Of the 175 postcodes in TN20 that ONS places, 52 have no home or business that can get gigabit, 49 have some that can, 72 can all get it and 2 have no Ofcom figure. 4 groups of postcodes without gigabit are outlined: 11 postcodes without gigabit; 11 postcodes without gigabit; 7 postcodes without gigabit; 6 postcodes without gigabit. 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 6WX: no Ofcom figureTN20 6BF: gigabit for allTN20 6DH: gigabit for allTN20 6EA: gigabit for allTN20 6EE: gigabit for allTN20 6ER: gigabit for allTN20 6EU: gigabit for allTN20 6HA: gigabit for allTN20 6HH: gigabit for allTN20 6JL: gigabit for allTN20 6JS: gigabit for allTN20 6JT: gigabit for allTN20 6JU: gigabit for allTN20 6LG: gigabit for allTN20 6NB: gigabit for allTN20 6NE: gigabit for allTN20 6NF: gigabit for allTN20 6NG: gigabit for allTN20 6NH: gigabit for allTN20 6NJ: gigabit for allTN20 6NL: gigabit for allTN20 6NN: gigabit for allTN20 6NP: gigabit for allTN20 6NQ: gigabit for allTN20 6NR: gigabit for allTN20 6NS: gigabit for allTN20 6NT: gigabit for allTN20 6NU: gigabit for allTN20 6PA: gigabit for allTN20 6PN: gigabit for allTN20 6PP: gigabit for allTN20 6PR: gigabit for allTN20 6PY: gigabit for allTN20 6QB: gigabit for allTN20 6RG: gigabit for allTN20 6RH: gigabit for allTN20 6RL: gigabit for allTN20 6TB: gigabit for allTN20 6TU: gigabit for allTN20 6TX: gigabit for allTN20 6TZ: gigabit for allTN20 6UB: gigabit for allTN20 6UH: gigabit for allTN20 6UP: gigabit for allTN20 6UR: gigabit for allTN20 6AA: some gigabitTN20 6AP: some gigabitTN20 6AU: some gigabitTN20 6BG: some gigabitTN20 6BW: some gigabitTN20 6DS: some gigabitTN20 6EH: some gigabitTN20 6EJ: some gigabitTN20 6ES: some gigabitTN20 6HJ: some gigabitTN20 6HN: some gigabitTN20 6HY: some gigabitTN20 6LD: some gigabitTN20 6LL: some gigabitTN20 6ND: some gigabitTN20 6NX: some gigabitTN20 6PJ: some gigabitTN20 6PS: some gigabitTN20 6PW: some gigabitTN20 6PX: some gigabitTN20 6RF: some gigabitTN20 6RJ: some gigabitTN20 6RQ: some gigabitTN20 6TD: some gigabitTN20 6TY: some gigabitTN20 6UL: some gigabitTN20 6UN: some gigabitTN20 6EB: some gigabitTN20 6EN: some gigabitTN20 6HL: some gigabitTN20 6TR: some gigabitTN20 6UE: some gigabitTN20 6AS: no gigabitTN20 6AT: no gigabitTN20 6BB: no gigabitTN20 6BD: no gigabitTN20 6DB: no gigabitTN20 6DG: no gigabitTN20 6DX: no gigabitTN20 6DY: no gigabitTN20 6ET: no gigabitTN20 6HP: no gigabitTN20 6HQ: no gigabitTN20 6HR: no gigabitTN20 6HU: no gigabitTN20 6HX: no gigabitTN20 6JA: no gigabitTN20 6JB: no gigabitTN20 6JD: no gigabitTN20 6JG: no gigabitTN20 6JH: no gigabitTN20 6JJ: no gigabitTN20 6JN: no gigabitTN20 6JX: no gigabitTN20 6LA: no gigabitTN20 6LB: no gigabitTN20 6LE: no gigabitTN20 6LF: no gigabitTN20 6LJ: no gigabitTN20 6PT: no gigabitTN20 6PU: no gigabitTN20 6QA: no gigabitTN20 6RA: no gigabitTN20 6RB: no gigabitTN20 6RD: no gigabitTN20 6RE: no gigabitTN20 6RN: no gigabitTN20 6RP: no gigabitTN20 6RR: no gigabitTN20 6RS: no gigabitTN20 6AJ: no gigabitTN20 6BS: no gigabitTN20 6NY: no gigabitTN20 6TT: no gigabit MayfieldUckfieldHeathfieldCross in HandBuxted 11 postcodes without gigabit, outlined: this goes to TN20 6DF, the one nearest the middle of them11 postcodes without gigabit11 postcodes without gigabit, outlined: this goes to TN20 6LN, the one nearest the middle of them11 postcodes without gigabit7 postcodes without gigabit, outlined: this goes to TN20 6JA, the one nearest the middle of them7 postcodes without gigabit Map of every postcode in TN20, by gigabit broadband Of the 175 postcodes in TN20 that ONS places, 52 have no home or business that can get gigabit, 49 have some that can, 72 can all get it and 2 have no Ofcom figure. 4 groups of postcodes without gigabit are outlined: 11 postcodes without gigabit; 11 postcodes without gigabit; 7 postcodes without gigabit; 6 postcodes without gigabit. Places named: Mayfield, Uckfield, Heathfield. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 5 km. A26A265 MayfieldUckfieldHeathfield 11 postcodes without gigabit, outlined: this goes to TN20 6LN, the one nearest the middle of them11 postcodes without gigabit
  • No home or business can get gigabit: 52
  • Some can get gigabit: 49
  • Every home and business can get gigabit: 72
  • Ofcom gives no figure: 2
  • Outline: where 5 or more postcodes without gigabit lie together

Of the 175 postcodes in TN20 that ONS places, 52 have no home or business that can get gigabit, 49 have some that can, 72 can all get it and 2 have no Ofcom figure.

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. A dashed outline shows where 5 or more lie within 210 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 51.0168, longitude 0.2503. Open this area on OpenStreetMap

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; Ofcom Connected Nations, Connected Nations, Spring 2026; roads, rivers and built-up areas: Ordnance Survey open maps. 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.

Postcodes without gigabit

52 postcodes here have no gigabit. These are the 12 first in postcode order.

TN20 6AJTN20 6ASTN20 6ATTN20 6BBTN20 6BDTN20 6BQTN20 6BSTN20 6BZTN20 6DBTN20 6DETN20 6DFTN20 6DG

Where the postcodes without gigabit lie together

  • 11 postcodes without gigabit, outlined on the map. TN20 6DF, is the one nearest the middle of them.
  • 11 postcodes without gigabit, outlined on the map. TN20 6LN, is the one nearest the middle of them.
  • 7 postcodes without gigabit, outlined on the map. TN20 6JA, is the one nearest the middle of them.
  • 6 postcodes without gigabit, outlined on the map. TN20 6RA, is the one nearest the middle of them.

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, Connected Nations, Spring 2026, data for January 2026.

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 flood risk, published 6 July 2026.

What do homes sell for in TN20?

Homes in TN20 sold for a typical £527,500 in the 12 months to September 2026, across 44 sales, HM Land Registry's figures show. The 12 months before gave £530,000 from 39 sales: not a change larger than chance would explain, given which homes happened to sell.

£527,500 typical price, the 12 months to September 2026
£530,000 12 months to September 2025
  • Detached £685,000 19 sales
  • Semi-detached £450,000 11 sales
  • Terraced £300,000 7 sales
  • Flat or maisonette £265,000 7 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 October 2026.

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

Where the facts on this page come from

Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0.

Licence: Open Government Licence v3.0.

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