Imagine a 1900-square-metre mansion on 8.7 hectares resembling an English manor, with eight bedrooms and 16 bathrooms. It’s also got an underground vault, waterslide, dog park, dog spa, two paw-washing stations and a treehouse with a 22-metre suspension bridge leading up to it.

Throw in a sound-proof aviary utilising the talents of San Francisco Zoo’s bird curator – and that is what you can get for US$39 million ($53.8 million) in Alamo, California. It’s the home of David Duffield, the founder of Peoplesoft and chair and co-founder of Workday.

​Duffield and his wife, Cheryl, are animal lovers, which might be evident from their very pet-friendly abode. They are planning to give the money from the sale – which will set a record for the suburb if it’s achieved – to their nonprofit dedicated to animal welfare, Maggie’s Fund.

The Duffields bought the property, which is nearly 50km east of San Francisco, in 2005 and construction was only finished three years ago. The family – with four dogs, four birds and 10 children – have now moved back to Lake Tahoe.

Maggie’s Fund is named after the Duffield’s miniature schnauzer, Maddie, who died in 1997.

The goal is “to create a no-kill nation where every dog and cat is guaranteed a healthy home or habitat” – they have reportedly already donated US$300 million to the cause.

Duffield is also planning to leave his wealth to Maggie’s Fund, rather than his children. The property, named Fieldhaven, is listed through Dana Green.

The pool with waterslide at Fieldhaven. Photo: Dana Green/7countryoaklane.com

The dog park at Fieldhaven. Photo: Dana Green/7countryoaklane.com

A treehouse like no other. Photo: Dana Green/7countryoaklane.com

Room for a big family. Photo: Dana Green/7countryoaklane.com