"It's clubs like this that have contributed to the success of Welsh rugby in recent years," he said. "Even more so in Rhiwbina's case, as their junior system helped develop the current Wales captain Sam Warburton."
The new facility was paid for through fundraising and Rhiwbina chairman Paul Maddocks praised everyone who had been involved in raising the £120,000 over the past 10 years.
"These changing rooms are ones that any club could be proud of and, along with our new training lights, represent all that's good about local grass-roots rugby," he said.
"To raise £120,000 for this wonderful facility took a great deal of work and fund-raising, and we shouldn't underestimate its value to the local community and the legacy it will it leave for years to come".
Rhiwbina president Gwynne Williams said, "The club has come a long way since its first game in February 1962, and it's good to see players who played in that very first game here today to celebrate another great step in Rhiwbina's history."