Anglesea Hospital will soon open its new wing as demand soars for the private hospital's facilities.
On April 28 the front door will open into a new reception area, recovery room, day stay area, operating theatre and staff facilities.
The extension cost $1.2 million, not including the cost of fit-out and equipment, which chief executive Nicky van Praagh said was a "significant amount".
The extension is stage two of a three-stage development that began last year.
The first stage, seven private suites, opened in November 2013.
Stage three, which van Praagh hopes will begin in May or June, will be another four private suites.
The new operating theatre - the third at the hospital - will be equipped with 3D imaging technology.
"We are entering a new era with a 3D imaging solution which provides improved speed, accuracy and precision for surgical procedures," said van Praagh.
A digital viewing room in the staff area will allow surgeries to be streamed live for training purposes.
Between 40 and 50 contractors are working on the site each day, overseen by construction group McMillan & Lockwood.
Van Praagh said the hospital, which treated around 2000 patients last year, is regularly full to capacity and high demand was the reason for the extension.
She said more surgeons are choosing to bring their patients to Anglesea Hospital, and there is an increase in more complex patients who require more care.
Approximately 45 nurses and ancillary staff work at the hospital. Van Praagh expects that number to increase "as we get busier and start using the extra theatre all the time".
She said surgeons choose to use the facility not only because of the equipment, but because of the quality of the staff.
"And that's what's made us so successful, really."
The hospital usually only takes patients who need to stay in recovery for less than a week.
The hospital is closed on weekends, though van Praagh said it does stay open if it needs to.
"The future stage is when we get that busy with the third theatre . . . we'll have to open at the weekends then."
Anglesea Hospital will be closed between Easter weekend and Anzac Day to complete the extension.