Fans of 1970s-era, Modernist-style homes are expected to be drawn to a newly listed Thirroul property.
Owner Carol Hartman described the property as a "'time capsule" and featuring "classic architecture".
"There's still the original carpet, orange carpet upstairs," she said.
"There's a lot of built-in carpentry that's still in good nick."
The home at 5 Fords Road, Thirroul sits on a 2095sqm block with timber-lined ceilings, open plan spaces and a suspended copper fireplace.
It features four bedrooms and a separate fifth bedroom/office, as well as two bathrooms.
Agents expect it will sell for at least $3 million.
The double brick home was built in 1975 and has original features.
The home was designed by renowned architects Ruskin Rowe, Elmes and Slatter, part of the Australian Modernist movement.
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Mrs Hartman and her husband Stephen Jakubiw "fell in love with it", and bought it ten years ago.
"We appreciated its uniqueness, and we tried to keep the original integrity," she said.
"We only ever changed something if it was really damaged and it had to be done. We both worked in building conservation in the past, so we were aware of... When you have to get rid of something, and what you try and keep.
"We had to pull some carpet out and we put some floorboards down. We didn't do much to it.
"It's been kept really well - it was good stock to start with. And things we had to change, we kind of just kept them with the '70s feel anyway."
During the building boom following World War II, many Modernist-style homes were constructed across Australia.
In recent times there's been a resurgence of interest in this style, features of which include flat or raked roof lines, floor-to-ceiling windows, easy interior flow and great indoor-outdoor connections.
A Ruskin Rowe & Elmes international style home at Pymble fetched $4.7 million at auction in 2015.
Also designed by the same architects was 'Marsden House' at Mount Pleasant, which has also proven popular among enthusiasts of this era of architecture.
The Thirroul property has a large sunken lounge with a separate dining room that has a floor to ceiling window framing the pond. The curved walls lead through to a '70s-style kitchen.
Mrs Hartman said she was selling in order to downsize.
She believed it would be well-suited to a large family that wanted privacy, as well as plenty of space to enjoy activities outdoors.
The selling agent is Laurie Johnston from One Agency Downie Denison-Pender.
"It's absolutely immaculate, and one of those Modernist homes that people just love," she said. "The architects who designed it have a huge following."
Ms Johnston said there was also potential to subdivide a 500sqm block at the back (subject to council approval).
The property is for sale by Expressions of Interest, which close on July 23, unless sold prior.
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