Pre-design (choosing architect, preparing brief): 1–3 months. Concept
design: 2–3 months. Design development: 2–3 months. Planning permit
application: 3–6 months. Construction documentation: 2–4 months.
Building permit: 6–12 weeks. Tender and contractor selection: 4–8
weeks. Construction: 6–18 months (project home: 6–9 months; custom
home: 10–18 months). Defects rectification: 1–3 months. Total: 18–36
months for a custom home. 12–18 months for a project home.
*The honest reality: if you’re starting from scratch with a custom
architect-designed home, plan for 2–3 years from initial decision to
moving in. If your timeline is shorter, a project home or off-the-plan
purchase may be more appropriate.*
Why Project Homes Are Faster
Volume builders like Metricon, Porter Davis, and similar companies can
build faster because: design is pre-approved and only requires minor
customisation, building permits are pre-approved for standard designs,
supply chains are optimised for their standard specifications, and
trades are engaged on rolling programs rather than project-by-project.
Why Custom Homes Take Longer
Custom architect-designed homes take longer because every design is
unique — there is no template. Design must be developed from scratch
for each project. Planning permits are assessed individually.
Construction documentation must address the specific conditions of each
site. Builders must price from scratch. Despite the longer timeline,
most clients find the custom process deeply satisfying and the outcome
worth the wait.
Factors That Add Time to Any Melbourne Build
Heritage overlay: add 2–4 months for heritage assessment and approval.
Complex planning permit: add 3–6 months. VCAT appeal: add 6–18 months.
Unusual site conditions (soil contamination, poor ground, drainage
issues): add 1–3 months to the construction phase. Complex structural
requirements: add 1–2 months to documentation and construction.
How Professional Project Management Reduces Timeline
An experienced project manager can reduce the overall timeline of a
custom home build by 3–6 months through: running design, planning, and
documentation phases in parallel where possible; streamlining the tender
process; managing the construction programme proactively; and resolving
issues before they cause programme delays. IDS has consistently
delivered client projects ahead of programme expectations.
Frequently Asked Questions
Can I live in my existing home while building a new one?
You can if the new home is on a different site. If you’re knocking down
and rebuilding on the same site, you’ll need alternative accommodation
for 12–18+ months. Many clients rent or live with family during this
period.
What causes the most building delays in Melbourne?
Weather (wet weather delays are common in Melbourne’s cooler months),
subcontractor availability (particularly trades like plasters, tilers,
and electricians), supply chain issues (still affecting some materials
in 2025), and variations requested by the owner.
Can I fix the construction timeline in the contract?
You can include a fixed completion date in the contract with a
liquidated damages clause. However, most builders will price a risk
premium into their contract price to cover timeline risk. A realistic
programme with an appropriate contingency is usually better than an
aggressive fixed programme that triggers disputes.
Ready to Get Started? Contact Integral Design Solutions today for
expert construction project management services in Melbourne and
Victoria. Visit integraldesignsolutions.com.au/ or call us to book a
free consultation.
