12 Harnett Avenue, Mosman, NSW 2088 | Property Value & History | OnTheHouse
OFF MARKET

12 Harnett Avenue
Mosman NSW 2088

Bedrooms: 4
Bathrooms: 4
Car spaces: 4
Floor area: 310m2
Land area: 1042m2
Estimated Value & Rent
Estimated Value
Estimated Rent
Confidence
Last updated 6 Jul 2026
Low

High
Save

Property Details for 12 Harnett Ave, Mosman

12 Harnett Ave, Mosman is a 4 bedroom, 4 bathroom House with 4 parking spaces and was built in 1920. The property has a land size of 1042m2 and floor size of 310m2. While the property is not currently for sale or for rent, it was last sold in January 2021.

Building Type
House
Year Built
1920
Floor Size
310m2
Land Size
1042m2
Local Government
Mosman
Lot/Plan
2/DP837536

Last Listing description (November 2019)

Occupying an extensive 1,051sqm block, this impeccably renovated period home features a versatile lower level studio, several alfresco entertaining areas, an ideal aspect, beautiful landscaped gardens and huge potential to further enhance or develop with its flexible R3 zoning (STCA).

Perched above the sprawling grounds of Reid Park in a blue chip cul-de-sac, its idyllic setting is only moments to Mosman Bay Ferry Wharf & Bus Terminal, Mosman Rowers Club, Avenue Road shops and cafes.


Offering a selection of formal and informal living areas, this sun-drenched home provides an abundance of space, perfect for contemporary family living.

Features include:

Four bedrooms, two with balconies boasting district views
Master bedroom with ensuite bathroom & built in robe
Large lower level studio/family room/5th bedroom equipped with kitchen & bathroom
Spacious open plan kitchen with gas cooking, casual living and dining
Teenagers retreat provides separate living room, kitchenette and balcony
Expansive outdoor entertaining areas including built-in BBQ and water feature
Gracious formal lounge and dining rooms with gas fireplaces
New Daikon reverse cycle air conditioning, cellar, established gardens
Huge double lock up garage with storage, plus off street parking for an additional two cars
Zoning: R3 - Medium Density Residential
Stroll to walking tracks, close to esteemed schools, Mosman Village & cafes

Alternatively, explore the options to expand the current home, or develop into townhouses (STCA), capitalising on the district views and premier location.

Please contact Jonathon De Brennan on 0422 033 837 or Michael Bao on 0431 818 528 for further information.


** All information contained herein is gathered from sources we consider to be reliable, however we cannot guarantee or give any warranty to the information provided. Interested parties should rely on their own enquiries using independent sources in relation to this property's development potential. Subject to Council Approval (STCA).

Property History for 12 Harnett Ave, Mosman, NSW 2088

A timeline of how this property has performed in the market
Last Sold
$4,500,000
22 Jan 2021
  • 22 Jan 2021
    Sold for $4,500,000
  • 01 Nov 2019
    Sold for $4,100,000
  • 15 Oct 2019
    Listed for Sale EOI Close at or before 3pm, Tues 12th Nov
Sign in to see more transactions
Commute Calculator

About Mosman 2088

The size of Mosman is approximately 8.7 square kilometres. There are 45 parks, covering nearly 29.6% of the total area. The population of Mosman in 2016 was 28475 people. By 2021 the population was 28329 showing a population decline of 0.5% in the area during that time. The predominant age group in Mosman is 50-59 years. Households in Mosman are primarily couples with children and are likely to be repaying over $4000 per month on mortgage repayments. In general, people in Mosman work in a professional occupation.In 2021, 64.10% of the homes in Mosman were owner-occupied compared with 62.80% in 2016.

Mosman has 16,035 properties. Over the last 5 years, Houses in Mosman have seen a 7.68% increase in median value, while Units have seen a 13.69% increase. As at 30 June 2026:

  • The median value for Houses in Mosman is $5,411,141 while the median value for Units is $1,423,330.
  • Houses have a median rent of $2,250 while Units have a median rent of $800.
There are currently 54 properties listed for sale, and 47 properties listed for rent in Mosman on OnTheHouse. According to Cotality's data, 612 properties were sold in the past 12 months in Mosman.

Suburb Insights for Mosman 2088

Market Insights
Mosman Trends for Houses
Median Value

N/A

-
View Trend
Median Growth

N/A

View Trend
Median Rent

N/A

-
View Trend
Rental Yield

N/A

-
View Trend
Median Value: The middle value of all properties across the geography based on the Automated Valuation Model.


Median Value over 1 year
Mosman Trends for Units
Median Value

N/A

-
View Trend
Median Growth

N/A

View Trend
Median Rent

N/A

-
View Trend
Rental Yield

N/A

-
View Trend
Median Value: The middle value of all properties across the geography based on the Automated Valuation Model.


Median Value over 1 year
Neighbourhood Insights
Age
Household
Occupancy
No data to show
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.