SA9 postcode district: Ystalyfera and around

SA9 is a postcode district in Wales, with 554 postcodes in use in 3 sectors. It has postcodes in Ystalyfera, Ystradgynlais and Pontardawe. It is split between 3 councils: Powys (348 postcodes), Neath Port Talbot (173) and Carmarthenshire (33).

Postcodes in use: 554
Sectors: 3
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 SA9, and which are new since 2020

New since 2020: 7
In use before 2020: 547

Of the 554 postcodes in SA9 that ONS places, 7 are new since 2020 and 547 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.

The middle of its postcodes: latitude 51.7814, longitude -3.7688. 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

SA9 5ABDecember 2025 SA9 1FRJuly 2024 SA9 1FWMarch 2024 SA9 1FSOctober 2023 SA9 2XWJanuary 2023

What broadband can you get in SA9?

Ofcom reports on 551 of the 554 postcodes in SA9. At 228 of them every home and business can get gigabit broadband, and at 1 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit228 of 551

Postcodes where every home can get superfast486 of 551

Postcodes where some cannot get decent broadband1 of 551

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

What do homes sell for in SA9?

Homes in SA9 sold for a typical £165,000 in the 12 months to August 2026, across 137 sales, down 7.3% on the 12 months before, HM Land Registry's figures show.

£165,000 typical price, the 12 months to August 2026

£178,000 12 months to August 2025

▼ down 7.3% on the 12 months before

Detached £286,000 46 sales
Semi-detached £145,000 43 sales
Terraced £147,625 48 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