Does Victorian stamp duty really change the maths?

Yes, significantly. Standard VIC stamp duty on a $1.3M principal-place-of-residence is roughly $70,000. On a $2M home it is roughly $110,000. First-home concessions do not apply if you already own. That is money you keep by rebuilding in place.

What about bridging finance for sell + buy?

Bridging finance in 2026 sits at 7-9% interest and needs to be repaid within 6-12 months. Typical bridging cost on a $1.3M-to-$1.3M swap: $15k-$35k. Some Melbourne buyers rent short-term instead ($800-$1,800/wk in inner suburbs for a family home).

Does KDR add or subtract value on a Melbourne block?

Usually adds, a new home on a good block typically resells for 15-30% more than a tired 60s-80s home on the same block. But you rarely get the full build cost back at resale within the first 3-5 years. KDR is a 'live in it' decision, not a 'flip it' decision.

Decision Guide

Knockdown-Rebuild vs Buy Existing in Melbourne

Rebuild on the block you already have, or sell and buy the home you want?

You love your Melbourne block, but the house on it does not work anymore. Rebuild in place, or sell and buy? The maths hinges on three things: Heritage Overlay, current market equity, and stamp duty on any replacement purchase.

Knockdown-Rebuild (KDR) on your current block

Pros

Keep the block, garden, views, streetscape you already chose
Avoid Victorian stamp duty on a new purchase ($30k-$120k saving on $1-2M homes)
Design the home exactly for your family
No moving out permanently, just for 14-22 month build
New 6-year statutory warranty + modern energy performance

Cons

$500k-$1.2M all-in Melbourne KDR cost
16-24 months from decision to keys
Blocked entirely by Heritage Overlay on ~40% of inner + middle-ring blocks
Temporary accommodation $30k-$70k during build
Loss of mature garden if trees affect footprint

Best For

• Non-Heritage-Overlay middle + outer-ring blocks
• Owners loving the location
• Homes past useful structural life (60s-90s brick veneer, cracked slab, asbestos)
• Owners staying 10+ years

Sell + buy a better home

Pros

Avoid the 14-22 month build displacement
Move in immediately, no temporary accommodation
Cheaper up-front cash impact, use existing equity + new mortgage
Blocked-by-heritage owners can move to a non-overlay suburb
Get any street, any suburb, any style you can afford

Cons

Victorian stamp duty $30k-$120k on $1-2M purchase
Agent commission + marketing $18k-$45k on the sale
Gap between sale and buy, bridging finance or moving twice
The dream home in your budget may not exist in your postcode
Compete in a rising Melbourne market

Best For

• Heritage-overlay blocks where KDR is refused
• Owners open to changing suburb
• Time-pressed families
• Owners without capacity for a 14-22 month build project

Melbourne 4-bed family upgrade, KDR vs sell+buy (2026)

Common Questions

Use VicPlan (mapshare.vic.gov.au), toggle the Heritage Overlay layer. If your block shows HO, full demolition is refused about 75-85% of the time. Any HO grading (Individually Significant, Contributory, Non-Contributory) usually blocks KDR. Only Non-Contributory in some areas sometimes goes through with strict conditions.

Sources

Last verified June 2026

ABS Building Activity, Australia (June 2026 quarter). Average new-house build cost used as the rebuild-side anchor. link
Cotality (CoreLogic) Home Value Index (2026). Melbourne established-house values used as the buy-side comparison. link
Victorian Building Authority (VBA) (2026). Demolition and building permits, and builder registration, for a knockdown-rebuild in Victoria. link
State Revenue Office Victoria — land transfer duty (2026). Transfer duty applies when you buy an established home; confirm current rates and any concessions. link

Cost ranges are planning estimates cross-checked against the sources above, not quotes. Prices move with materials, labour, site conditions and council rules. Always confirm against a written, fixed-price quote for your own block.