I did lots of shopping around for materials so far. Off the shelves uPVC windows and doors, ring around local supplier on engineering bricks and concrete blocks etc. 1 tonne bag of sands cost from 23 pounds to 45 pounds just by ringing different supplier and buy in bulk.
Most resent purchase is a RSJ of 6 meter with size specified by architect and engineering calc total £140 inc delivery, my builder choice of supplier wanted £1200.
I had my kitchen extension built by polish builders and now the play house by Chinese builders, cheapest I can find in labour. Lucky both team have very good standard but it was a gamble which so far paid off as both project so far bang on budget.
I am a drug dealer by trade so building trade is new for me, please be patient with my questions.
Many thanks