Guide Knowing what a knockdown rebuild actually costs not the headline number, but the full cost is the most important thing you can do before committing. Here’s a simple breakdown.
A typical 3–4 bedroom KDR in Melbourne’s northern suburbs ranges from $600,000 to $1.2M+ depending on size, specification and site constraints. The wide range exists because the variables are significant. Here’s how each cost component breaks down:
Demolition & asbestos
$15,000–$30,000. Asbestos inspection is mandatory on pre-1990 homes. Don’t skip it.
Design & documentation
$15,000–$40,000. Depends on whether you use a draftsperson or architect, and the complexity of the design.
Permits & Planning
$5,000–$15,000. More if a planning permit is required (heritage overlay, non-compliant setbacks, etc.)
Construction
From $2,200from $2,200–$3,500+ per square metre depending on specification. A 200sqm home at mid-spec = approx. $440,000–$700,000 in construction costs alone.
Other costs to budget
landscaping, connection fees, temporary accommodation during the build (typically 12–18 months).
Temporary accommodation, utility disconnection and reconnection fees, rock or difficult soil conditions, BAL (Bushfire Attack Level) ratings if applicable, and upgrade costs when selecting finishes. We walk through all of these at the consultation so nothing catches you off guard.
Online cost calculators give you a ballpark. A proper fixed-price quote from a builder who has walked your block gives you something you can actually rely on. We offer a free site visit and consultation with no obligation.
For large-scale changes, often yes. If you're spending more than 50–60% of rebuild cost on a renovation, the economics usually favour a Knockdown Rebuild. And you get a fully custom new home rather than an upgraded old one.
01
Is a knockdown rebuild cheaper than a major renovation?
For large-scale changes, often yes. If you’re spending more than 50–60% of rebuild cost on a renovation, the economics usually favour a KDR. And you get a fully custom new home rather than an upgraded old one.
02
What’s the cheapest knockdown rebuild option in Melbourne?
A simple, compact design with standard finishes on a flat block with no heritage overlay will be at the lower end. Budget $600,000–$750,000 for a 3-bedroom home at entry spec in Melbourne’s north. We’ll give you honest numbers at the consultation.
03
Are there hidden costs in a knockdown rebuild?
Yes, and they’re predictable once you know what to look for: temporary accommodation, asbestos removal, difficult site conditions, utility connections and landscaping. We itemise all of these in our quotes.
04
How do I get an accurate knockdown rebuild cost?
The only accurate cost is a fixed-price quote from a builder who has assessed your specific site. Online calculators are useful for a ballpark but shouldn’t be used for financial planning. Book a free consultation and we’ll give you realistic numbers.
Free site visit. Honest cost assessment. No obligation.
© Hylton Constructions 2026