Home extension builders in Kew
An information-only vetting guide for home extension builders working on Kew period homes. A Kew home extension - rear ground-floor, side-return infill, or first-floor addition - integrates a contemporary volume with an existing period home. The heritage overlay controls what happens above the ridgeline; ResCode Clause 54 controls overshadowing and overlooking on the neighbour boundary. BuildPilot is not yet matching builders in Kew - this is a curator's checklist while VIC matching rolls out in 2026.
By George Giannakakis · B.Arch.Studies · M.Arch (UniSA) · RLA300580
Last reviewed: · How we research
What matters in Kew
Kew architectural era
Predominantly Federation, Edwardian and inter-war Californian bungalow. Mid-century modernist stretches on Cotham Road / Barkers Road. Some 1970s-2000s courtyard homes.
Heritage + planning overlays
Approximately 50-60% under Heritage Overlay. Vegetation Protection Overlay coverage is extensive - Kew's established tree canopy is protected on most streets. Boroondara planning permit lead time (heritage): 4-9 months for internal reno + external alterations, 8-14 months for extensions.
Typical lot geometry
Median residential lot 650-900m². Larger 1,200m²+ lots along Yarra escarpment. Narrower townhouse-sized 350-500m² lots in redevelopment pockets.
Heritage-visible ridgelines and first-floor setbacks
Boroondara City Council heritage assessment typically requires that any first-floor addition sit behind the original ridgeline, set back from the front elevation, and finished in a sympathetic (but distinguishable) material palette. A rear extension is usually approvable; a visible first-floor addition can fail heritage. Concept-stage feedback from the council heritage officer saves 3-6 months.
Kew FAQs
How much does a home extension cost in Kew?
Rear ground-floor extension (30-60m²): $280k-$550k. First-floor addition (60-100m²): $450k-$950k. Full renovation with rear extension and first-floor: $850k-$2.5m+. Costs sit 20-35% above Melbourne median because of the heritage detail requirement, tighter site access, and specialist trade selection.
Do I need a Planning Permit for this work in Kew?
Approximately 50-60% under Heritage Overlay That means most external work (extensions, window relocations, front-elevation changes, roof-form changes) triggers a Planning Permit before Building Permit. Internal-only work often only needs a Building Permit. Check Boroondara City Council's heritage assessment guidance or a title search on VicPlan (mapshare.vic.gov.au) before you commission drawings.
How do I verify a home extension builder operating in Kew?
Three checks: VBA public practitioner register at vba.vic.gov.au/practitioners/register (ARBV register at arbv.vic.gov.au for architects); Domestic Building Insurance (DBI) eligibility confirmation with VMIA for your contract price - compulsory over $16,000; Three completed Boroondara City Council projects delivered in the last 24 months, with the client's permission to inspect. Do all three before you pay any deposit.
Why do Kew trades cost more than the Melbourne median?
20-40% above Melbourne median trade rates. Contributing factors: heritage-detail skill premium, tighter site access on established streets, specialist trade selection (heritage plaster, cast iron, leadlight, sympathetic joinery), and premium finish-level expectation on Kew projects. Trade rates in Kew track closer to inner-Melbourne premium rates than to greenfield growth-corridor rates.
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Join Victoria waitlistDisclaimer: Pricing ranges are Mar 2026 Melbourne market observations and indicative only. Actual cost depends on site conditions, access and finish level. BuildPilot is an independent home-build CoPilot and does not build or supply. Always obtain three fixed-price quotes on identical inclusions.
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