About 100 people attended the official opening of McNulty House last week.
Old Cromwell Inc Society chairwoman Helen Scoles said the society was very pleased at the quality of work carried out by Alexandra contractors Breen Construction.
The society was hoping to hold regular open days and was working through the details of when they would be.
The house would be available for short-term hire for events including exhibitions, workshops, and community events. Smaller gatherings up to 50 people could take place inside the house.
The society was also planning to use one room as an office.
The historic home in Inniscort St was originally built for John Marsh in about 1890, but various alterations to the interior including false ceilings meant little inside looked original.
The restoration uncovered features including original tongue and groove woodwork, as well as revealing an original archway in the hallway.
The rooms had been restored to reflect what the house may have looked like when new.