About D.A Miller & Sons D A Miller & Sons (Construction) Ltd is a family run company based in Claudy, Co.Londonderry, specialising in exclusive developments of charter and style in the Londonderry area. Established in 1999 after the desolve of Miller Brothers Est. 1976, with the years of experience gained from this, D A Miller & sons (construction) Ltd continue on priding themselves in first class craftsmanship at all stages of the construction by ensuring all employees and associates are suitably qualified and trained. For further information on any of our properties or the sites that we will be starting on soon, please contact us using the details on the contact page.