Seeking some advice from seasoned SS contributors before I go any further with my plan to put a GF on my block in Guildford. The builder of the newish house already there can put a 3 bedder there in the same style, still waiting for figures but under 140 k, I am aware of the soil and paid a lot for the site works of the current house, however I had the site back filled significantly when I finished demolishing the old house so hopefully it would be much less. The builders are happy to do soil testing before they come up with a final figure. Mortgage broker seems confident I can raise the money via equity, the house there is also rented out but I have not discussed with them yet. Any thoughts, advice, suggestions would be very gratefully received.