It is possible that at the time of buying the house, the builder would have got tied up with a lender who is charging you more interest rate. Not knowing this and in the magic of the words that the builder have spoken with you, you would have committed with the lender who aimed at making money by charging more interest rate for their house loan clients. So, soon after you have got the house registered in your name, you could transfer this loan to a new vendor who understands your concern of paying huge interest amount on the less amount of house loan taken by you.
You need not have to worry whether a different lender would be ready to let you transfer your existing house loan. The manchester mortgages would immediately accept your request and would provide you the basic information that would let you clearly picturize what sort of benefits would be available to you when you do such transfer. In financial terms this transfer of house loan is called as remortgage. One other possibility that you have is to transfer the house loan you have with this vendor into the name of the buyer who has finalized the deal of buying your house.
It is possible that you may want to invest initially on a flat or villa or row house whichever name you would like to give to the new construction that you have planned to invest. Once the construction is completed you could sell it at a best price thus having some profit in this deal. So, this sort of investments is made possible with the easy transfer of the loans that are given by the most popular vendor who would charge reasonable interest rates.