Design Buy Build Issue 36 2019 | Page 76

He said: “This was an interesting project and it has been wonderful to deliver such a beautiful family home for our client. “Creating such an extensive basement level in this part of north London meant we had to go to great lengths to guard against the possible presence of small underground streams, drilling more than 120 secant piles to a depth of 13m. “As well as the reinforcement cages used in the piles an additional 97 tonnes of reinforcement were used to build the base slab and retaining walls around the site. “When we took over the project we also had to address a number elements, essentially the internal layout and the roof which was designed as a butterfly roof. “We managed to simplify the roof structure and made it into a crown roof that by itself provided 700sqft of additional usable space but at a lower cost. “We also extended the basement to house a larger swimming pool. These alterations allowed for the lift shaft to extend to the second floor as desired by the client. “The changes we made increased the size of the house from 8500sqft to 10500sqft internally without significantly affecting the overall budget.” 76