DA3 postcode district: Longfield, New Ash Green and Hartley and around, Kent

DA3 is a postcode district in Kent, with 355 postcodes in use in 3 sectors. It has postcodes in Longfield, New Ash Green and Hartley and West Kingsdown. It is split between 3 councils: Sevenoaks (244 postcodes), Dartford (108) and Gravesham (3).

Postcodes in use: 355
Sectors: 3
Councils: 3 councils
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 DA3, and which are new since 2020

New since 2020: 8
In use before 2020: 347

Of the 355 postcodes in DA3 that ONS places, 8 are new since 2020 and 347 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. 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 51.3842, longitude 0.3084. 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

DA3 7FAJune 2026 DA3 7BXOctober 2024 DA3 9DUSeptember 2024 DA3 8NHMay 2023 DA3 7BWMarch 2023

What broadband can you get in DA3?

Ofcom reports on 344 of the 355 postcodes in DA3. At 126 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit126 of 344

Postcodes where every home can get superfast294 of 344

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 DA3 at risk of flooding?

None of the 355 postcodes in DA3 is on the Environment Agency's list of postcodes with a home or business in an area at risk of flooding from rivers or the sea.

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 DA3?

Homes in DA3 sold for a typical £480,000 in the 12 months to August 2026, across 213 sales, up 3.2% on the 12 months before, HM Land Registry's figures show.

£480,000 typical price, the 12 months to August 2026

£465,000 12 months to August 2025

▲ up 3.2% on the 12 months before

Detached £680,000 82 sales
Semi-detached £487,000 50 sales
Terraced £332,500 66 sales
Flat or maisonette £230,000 15 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