I would not recommend Walker Civil Construction ! I had $25000 worth of exposed agrigate concrete and earth works done. they left my house in a disgusting state, concrete wash all up the house, it took me a 6hrs to scrub the house with a scourer to clean walls and windows. A drain was full of concrete and no expansion foam around the house that he said would be installed. The job was done while I was away and my son felt uncomfortable taking photos of the works, to send me, the workers kept questioning why he was taking photos. When I came home I contacted them and was never received a reply. The concrete cracked in several places after about a month and now has a lot of very large cracks due to insufficient expansion cuts being installed. The work is 8 mths old!