The 18-year-old missed Tuesday night's penalty-kicks win over Cowdenbeath in the League Cup after being granted permission to hold talks with the English Championship outfit.
McGrandles made his debut nearly two years ago, just five days after his 17th birthday, and the athletic midfielder has gone on to make 72 first-team appearances. It is on the recommendation of former manager Gary Holt, who left Westfield in the summer to return to old club Norwich as assistant to Neil Adams, that has encouraged the East Anglia club to target the youngster.
Houston said: "Norwich City have been given permission to speak to Conor with regards to having made an offer, which suggests to me that both clubs are round about there. When teams from England come calling they obviously have money to put on the table and it's money which this club probably has to use to survive.
"It's very disappointing from a manager's point of view. I will be disappointed to lose him, if indeed it goes through. But, in the same breath, I am delighted for the boy, who has come through the academy as a 12, 13, 14-year-old."