Congerton arrived at the Stadium of Light last month, taking over from Italian Roberto de Fanti, who had brought in almost exclusively foreign players to the club.
Indeed, of the 14 players signed by Sunderland last summer, only non-league striker Duncan Whatmore was British.
And Congerton confirmed that the club's policy will be changing going forward as they look to the domestic front.
"Ultimately we want British players, but they cost a lot more money so we need to be smart in the market place and do our research thoroughly," he told Sunderland's matchday programme.
"When you bring in a foreign player you've got to appreciate the difficulties off the field and the patience needed.
"It helps if they've already played in the league. I look at Fabio Borini, who I think has been a success this year.
"He's a foreign player, but he's been established in this country since he was around 15 or 16 years of age. I think that's a market you have to look at quite carefully."
Congerton confirmed he will be holding a meeting with manager Gus Poyet about their transfer plans in the near future.
"I've not really known Gus. Obviously I've seen his Brighton team play before and he does, in my opinion, play football the right way," he said.
"We want players who can play that way. There will be a scouts meeting where over two days we'll discuss with Gus the types of players we are looking for.
"I'll then be assessing which potential targets are realistic and also assessing our loan players because at the end of the day, they are our players."