Contact Sally Cameron on 0412 915 108 for inspection time.

Best offers by Tuesday 14th October 2025 at 10am (unless sold prior)

“CASTLEMAINE”

Offered to the market only second time in 65 years, this is a truly exceptional opportunity to become the new custodians of a landmark estate on one of Adelaide’s most exclusive and highly sought-after streets.

Situated on sweeping park like grounds approximating 3,659sqm adjacent Seymour College, its expansive floorplan offers versatile family living on a grand scale, panoramic views across Adelaide, and wow-factor resort style outdoor entertaining including a north/south tennis court, pool and pavilion.

Provenance & architecture

Built in 1919 for prominent journalist and editor of “The Register” Sir William Sowden and named after his birthplace, “Castlemaine” is one of the original estates to grace this historically affluent suburb. It has been suggested that the suburb of St Georges in fact takes its name from the Royal Society of St George of which Sir William was president.

Designed by architects Williams and Good, it is undoubtedly one of the grandest examples of the popular Arts and Crafts movement in South Australia, with its stately frontage and distinctive crenelated tower with an observation deck that affords breathtaking 360-degree panoramic views from the foothills across Adelaide to the Gulf. The current owners have undertaken extensive improvements to the property.

An architectural expansion has added layers of modern comfort and convenience that honour the home’s original integrity, with contemporary outdoor elements taking centre stage.

Entrance and formal living

With its impressive street frontages approximating 105m, the house boasts a valuable corner position with two driveways and triple garage entry from Purnana Ave.

From the tower’s portico, an entrance foyer with parquetry flooring opens to a vast reception room ideal for large scale formal entertaining.

North facing bifold doors to outdoor entertaining, and pocket doors that slide away to link casual living cleverly transform this room to create one enormous connected indoor/outdoor entertaining space if required.

Primary suite and family accomodation

Downstairs, the eastern wing hosts the luxurious primary suite with French doors that gaze over and open out to the glorious front garden.

An opulent marble ensuite incorporates a spa bath, double vanities and heated towel rails, whilst the large walk-in dressing room has floor to ceiling built-in joinery.

Next door, a highly versatile room would make the perfect nursery or second study.

With built-in robes, it could also be utilised as a dressing room for bedroom two.

A privately situated home office looks through full length windows into a light filled atrium with a powder room and laundry close by.

Up the sweeping staircase, a bathroom and two large bedrooms that incorporate study rooms, built-in robes and elevated views across the grounds and the city to the coast.

A fifth bedroom currently disposed as a living retreat with in-built speakers also looks across the city skyline.

Open plan living

Flooded in northerly light, monumental informal living is an entertainer’s dream, with a kitchen packed with Miele appliances, custom JAG joinery, two curved granite topped islands and wraparound countertops.

A walk-in pantry has room for a second fridge Bifold doors seamlessly connect the elevated outdoor dining/living platform from which to watch tournaments on the floodlit court.

Resort style living & grounds

The spectacular terraced grounds and alfresco living provide outstanding entertaining options that fully befit a home of this calibre and proportion.

The jewel in the crown is the jaw-dropping outdoor pavilion central to the all-weather north/south synthetic tennis court with lights, the fully tiled solar heated 12m by 5m approx. pool and a rear lawn on which to play.

Vast and versatile, it incorporates a huge living retreat large enough for lounging, games or gym equipment, and expands through bifolds to undercover decked dining with an outdoor kitchen, and the pool.

Teaming with birdlife, majestic trees and rolling lawns frame the house. A slate path meanders past box edged garden beds towards a terraced potager with a large variety of fruit and citrus trees and glorious roses.

Location

Premier dress-circle address approx. 6km to Victoria Square.

Adjacent Seymour College

Lifestyle

Minutes from the newly expanded Burnside Village; Portrush Road & Beaumont shopping strips; Waterfall Gully & Beaumont walking trails; Feathers & Norwood lifestyle hubs

Education

Steps from Seymour College. Zoned to Glenunga International & Linden Park Primary. Close to Saint Peters Girls, Loreto, Pembroke

Architectural notes

• Designed by Williams & Good Architects c.1919
• 21st century architectural expansion

Parking & security

• Remote entry three car garage with storage room / workshop & direct internal entry
• 3 additional parking spaces plus second driveway parking
• Alarm

Comfort

• Ducted & zoned R/C air (2 x units)
• Bathrooms with heated towel rails
• Automated blinds in ensuite, kitchen, casual living area and main house patio
• Automated internal atrium blinds

Technology

• 17.28kW solar panels
• Tesla battery
• Micro inverters
• Integrated speakers formal lounge and casual living, upstairs retreat, main house patio, pavilion & pool area
• Termite protection

Appliances

• Miele induction cooktop, oven, steamer, microwave, warming drawer & dishwasher
• Garbage disposal
• Ziptap

Storage

• Cellar with wine storage and under house storage
• Walk-in storage room
• Extensive built-in joinery
• Garage built-ins
• Outdoor pavilion with tech hub
• Pool equipment store
• Roof access

Pavilion

• Ceiling fan
• Split system air
• Surround sound indoors & out
• Outdoor kitchen with Weber BBQ, bar fridge, sink & pura tap

Pool

• Saltwater, cartridge filtration
• Solar heated
• Fully tiled
• Glass fence
• Poolside sun lounge/entertaining area
• Equipment room

Tennis court

• Synthetic surface
• Lights
• Basketball ring and line markings

Garden

• Garden done by David Baptiste and Beryl Bredon
• Automatic irrigation
• 4 x rainwater tanks plumbed to sump & irrigation with approx. 32,000L capacity
• Mandarin, lemon, orange, apricot, nectarine, passionfruit & fig trees; grape vine
• 3m by 4m garden shed