The former Newport County captain, who had been an ever present in the side this season before missing out in the mid-week 0-0 draw with Dundee United though suspension, made a welcome return to Caley Thistle's defence on Saturday.
The 28-year-old gave Terry Butcher's side a boost ahead of the fourth derby of the season by signing a new two-year deal.
Warren said: "I'm delighted to have signed a new contract. It was good to get it done and dusted before the game.
"When I was younger it is what I dreamed of (playing at a higher level), it's taken me a long time to get here.
"It's great playing here in the SPL and being in with a chance of getting a European place."
Warren admitted the game itself was a bit of a 'slog' but felt a draw was a fair result.
Chances were few and far between with the both sides cancelling each other out on a tricky surface.
Warren said: "The pitch wasn't ideal for playing good football on but the teams went toe to toe and at the end of the day a draw was probably a fair result.
"We've proved over the last couple of games to be more resolute at the back and although we haven't scored in either of them you sometimes have to consolidate to keep a clean sheet."