Monmouthshire Building Society, (Welsh: Cymdeithas Adeiladu'r Sir Fynwy), is a building society based in Newport, Wales. The Society provides typical building society services including: a range of mortgage and savings products. insurance, financial planning, legal services and funeral plans some of which are provided via third-party companies. The Society is a founder member of the Building Societies Association and Council of Mortgage Lenders, as well as being a member of the Financial Services Compensation Scheme.