She and husband Tony Stack-Forsyth are in their early 60s now and the children are grown up. It's time to move on and they have already found a new home in St Heliers near the sea.
Still, they are reluctant sellers because - like the owners before them - they have lived in the house for 31 years.
When they arrived from the hustle and bustle of London in the early 80s ready to start a family, they fell in love with the then small weatherboard house with the grand entrance in a peaceful, leafy Epsom cul-de-sac in the Grammar zone and close to cafes and parks.
They asked architect and friend Richard Harris, of Jasmax, to help redesign the house, and a bedroom wing was added. It has a large master bedroom with en suite and two smaller bedrooms off an airy hallway of windows, with French doors opening to the enclosed, sunny backyard.
The house has also gone from no storage to tonnes of it, with cupboards and recesses maximising unused space. Robyn stands in the roomy kitchen, which was once a bedroom, and looks out through the open-plan sunroom - one of three living areas - telling how when her children were older they confessed to climbing on to one of the window ledges and jumping into the fully fenced pool below.
She laughs that she is glad she didn't know this at the time.
From the sunroom you can walk into the formal lounge and dining room where a fireplace has been added. It's a long, regal room where the table and couches have been pushed aside many times to make way for dancing.
Stairs beside the lounge lead down to a separate bedroom with its own living area, perfect for teenagers or for guests.
Down here is internal access to the garage with carport alongside and a nifty "man cave", where Tony loves to potter.
Back upstairs, the kitchen also leads to the big deck and the flat, grass yard where an avocado tree and grapefruit tree are laden with fruit.
The sheltered backyard is a suntrap, Robyn says, and is never too windy. The sloping banks and trees give privacy from the neighbours.
But Robyn says she has also loved living here because of the friendliness of the neighbours. This is a cul-de-sac where people still gather for street barbecues.
She hopes the next owners will love the house as much as her family has - perhaps they, too, will stay for 31 years.