The deal is discounted for the term of the mortgage by 0.8 per cent off the society’s self-build standard variable rate, offering borrowers a rate of 4.69 per cent.
The mortgage is available up to 80 per cent loan to value with a maximum loan of £500,000.
Sam Ward (pictured), head of commercial at Dudley Building Society, said: “Self-build is a small but significant part of the market and one which requires specific expertise. 3mc has not only demonstrated its commitment to introducing quality business to the society over time but are committed to working with us to develop the self-build proposition for the future.”