11/21 South Avenue, Double Bay, NSW 2028 | Property Value & History | OnTheHouse
OFF MARKET

11/21 South Avenue
Double Bay NSW 2028

Bedrooms: 2
Bathrooms: 1
Car spaces: -
Floor area: 75m2
Land area: 638m2
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Last updated 9 Feb 2026
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Property Details for 11/21 South Ave, Double Bay

11/21 South Ave, Double Bay is a 2 bedroom, 1 bathroom Unit and was built in 1930. The property has a land size of 638m2 and floor size of 75m2.

Building Type
Unit
Year Built
1930
Floor Size
75m2
Land Size
638m2
Local Government
Woollahra
Lot/Plan
B/DP76903

Last Listing description (March 2018)

Timeless contemporary design meets classic Art Deco elegance at this spacious apartment on the top floor of 'Winton', a boutique building of twelve set in a quiet tree-lined avenue at the edge of Double Bay.
Featuring a sunny East-facing curved balcony and wide windows with a delightful leafy outlook, the generously proportioned apartment has a long entry hall, main king-size bedroom, 2nd double bedroom, modern bathroom, concealed laundry, gourmet gas kitchen (with wide Calacatta marble island bench), open-plan dining zone and large living area with custom-designed cabinetry and reverse-cycle air-conditioning. Bright, airy and wonderfully private, it also features high ceilings, built-in wardrobes, travertine flooring and plush carpet.
Stroll to cafes, restaurants, shops, harbourside Steyne Park, ferries, buses and Edgecliff train station.

PROPERTY FEATURES
Art Deco block with timber-panelled foyer
Quiet & private position on top floor
Living & dining area opens to balcony
Modern bathroom with bath/shower
Built-in wardrobes, air-conditioning

Property History for 11/21 South Ave, Double Bay, NSW 2028

A timeline of how this property has performed in the market
  • 22 Feb 2018
    Listed for Sale SOLD PRIOR TO AUCTION $1,250,000
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About Double Bay 2028

The size of Double Bay is approximately 0.8 square kilometres. It has 6 parks covering nearly 10.0% of total area. The population of Double Bay in 2016 was 4642 people. By 2021 the population was 4709 showing a population growth of 1.4% in the area during that time. The predominant age group in Double Bay is 30-39 years. Households in Double Bay are primarily childless couples and are likely to be repaying over $4000 per month on mortgage repayments. In general, people in Double Bay work in a professional occupation.In 2021, 53.10% of the homes in Double Bay were owner-occupied compared with 54.90% in 2016.

Double Bay has 3,728 properties. Over the last 5 years, Houses in Double Bay have seen a 51.44% increase in median value, while Units have seen a 34.79% increase. As at 31 January 2026:

  • The median value for Houses in Double Bay is $7,451,804 while the median value for Units is $1,928,714.
  • Houses have a median rent of $1,500 while Units have a median rent of $1,150.
There are currently 17 properties listed for sale, and 14 properties listed for rent in Double bay on OnTheHouse. According to Cotality's data, 167 properties were sold in the past 12 months in Double bay.

Suburb Insights for Double Bay 2028

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Cotality Copyright and Legal Disclaimers about Property Data
Disclaimer
The Cotality Data provided in this publication is of a general nature and should not be construed as specific advice or relied upon in lieu of appropriate professional advice.

While Cotality uses commercially reasonable efforts to ensure the Cotality Data is current, Cotality does not warrant the accuracy, currency or completeness of the Cotality Data and to the full extent permitted by law excludes all loss or damage howsoever arising (including through negligence) in connection with the Cotality Data.