UPDATE | KILLARNEY VALE Houses, 3-bedroom vs 4-bedroom | October 14th, 2025


Author: Michael Daniels


As Central Coast Mortgage Brokers, we have the privilege of witnessing our clients use impressive wealth-creation tactics. One tactic we regularly see is converting 3-bedroom houses into 4-bedroom houses. Today, we are going to analyse this option in Killarney Vale. 


Over the last 12 months, 4-Bedroom house prices grew by 7.30% to $1,030,000. 3-Bedroom house prices grew by 3.9% to $885,000. Although these median prices are high, Killarney Vale is a relatively affordable area given its proximity to the beach and its broader location in the middle section of the Central Coast.


Killarney Vale's 3-bedroom house prices, in particular, offer potential for growth if owners can add a bedroom at a relatively low cost. With a $145,000 gap between 3-bedroom and 4-bedroom houses, adding a bedroom with something like an internal wall would be an instant gain.


The new First Home Buyer 5% Government Guarantee Scheme will add to Killarney Vale demand, as it was always a favourite for this buyer group. I have broken down a qualifying home scheme purchase at $885,000 below:


   $885,000     Purchase Price (Killarney Vale Median 3-bedroom house price)

+ $  17,102     NSW Government duty and fees (a saving of $17,487 for first home buyers)

+ $            0     Lender's Mortgage Insurance premium (waived under the 1st home buyer scheme

+ $     1,898     Approximate legal costs

= $904,000     Total purchase cost

-  $   63,250     Cash contribution required from the buyer

=  $840,750     Proposed loan amount

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