Aberavon Mutual Permanent Building Society was a

building society A building society is a financial institution owned by its members as a mutual organization. Building societies offer banking and related financial services, especially savings and mortgage lending. Building societies exist in the United Ki ...

in the United Kingdom. It is mentioned in the deeds to several properties at the West Glamorgan Archive Service. In January 1974 the society was acquired by the

Principality Building Society The Principality Building Society ( cy, Cymdeithas Adeiladu'r Principality) is a building society based in Cardiff, Wales. With assets of £10bn it is the largest building society in Wales and the sixth largest in the United Kingdom. Principali ...

References

Former building societies of the United Kingdom {{UK-bsoc-stub