IP18 postcode district: Southwold and around, Suffolk

IP18 is a postcode district in Suffolk, with 295 postcodes in use in 1 sector. It has postcodes in Southwold and Reydon. Its council is East Suffolk.

Postcodes in use: 295
Sectors: 1
Council: East Suffolk
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 IP18, by gigabit broadband

No home or business can get gigabit: 32
Some can get gigabit: 50
Every home and business can get gigabit: 210
Ofcom gives no figure: 3
Outline: where 5 or more postcodes without gigabit lie together

Of the 295 postcodes in IP18 that ONS places, 32 have no home or business that can get gigabit, 50 have some that can, 210 can all get it and 3 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 150 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 52.3305, longitude 1.6704. 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; gigabit: Ofcom, Connected Nations, Spring 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

Postcodes without gigabit

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

IP18 6AJ IP18 6AU IP18 6BB IP18 6DL IP18 6HN IP18 6HP IP18 6HR IP18 6HS IP18 6JS IP18 6PB IP18 6RW IP18 6SB

Where the postcodes without gigabit lie together

5 postcodes without gigabit, outlined on the map. IP18 6HP, is the one nearest the middle of them.

What broadband can you get in IP18?

Ofcom reports on 292 of the 295 postcodes in IP18. At 210 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit210 of 292

Postcodes where every home can get superfast276 of 292

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 IP18 at risk of flooding?

62 of the 295 postcodes in IP18 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 180 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 62 of 295 postcodes High: 170Medium: 10Low: 89Very low: 167

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 IP18?

Homes in IP18 sold for a typical £430,000 in the 12 months to August 2026, across 70 sales, down 3.6% on the 12 months before, HM Land Registry's figures show.

£430,000 typical price, the 12 months to August 2026

£446,000 12 months to August 2025

▼ down 3.6% on the 12 months before

Detached £584,975 30 sales
Semi-detached £370,000 11 sales
Terraced £270,000 21 sales
Flat or maisonette £268,000 8 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