Melton is one of the fastest-growing local government areas in Australia. It is also one of the most overlooked when it comes to secondary dwelling information — which leaves a lot of homeowners in Melton, Melton South, Rockbank and the surrounding townships without a clear picture of what they can actually build on their blocks.
This guide covers the rules, the block sizes and the process for building a granny flat Melton Melbourne in 2026 — including which Melton City Council zones apply, what the approval process looks like and which G-Flat™ floor plan suits the typical Melton property.
Why Melton Is a Strong Suburb for a Secondary Dwelling
Generous block sizes. Melton’s established residential areas — particularly Melton South, Melton proper and the older sections of Eynesbury — feature blocks typically in the 450sqm to 800sqm range.
Rapid population growth driving family housing demand. Melton’s population has grown significantly over the past decade. Multigenerational family households are common across the LGA, and secondary dwellings are an increasingly popular way to accommodate that family structure on a single title.
Melton City Council’s planning framework. For secondary dwellings under 60sqm in a General Residential Zone — which applies across most of Melton’s established and newer residential areas — no planning permit is required. A building permit is required and covers structural compliance, energy ratings and safety standards.
What Are Melton City Council’s Rules for a Secondary Dwelling?
No planning permit required for secondary dwellings under 60sqm in a General Residential Zone. A building permit is still required.
Standard setback requirements apply. You can review the setback rules for Melbourne for a full breakdown. Melton’s generous block sizes typically make these easy to satisfy.
Flood and drainage overlays. Parts of Melton — particularly areas near Toolern Creek and the Werribee River catchment — carry LSIO or SBO controls. If a flood overlay applies to your property, a planning permit is required.
Restrictive covenants. Some Melton estates carry restrictive covenants on titles. A title search will confirm whether any apply to your specific lot before you proceed.
Rural and low-density zones. Properties in Melton’s rural fringe areas — Toolern Vale, rural lots surrounding the township — may fall within Rural Living Zone or Green Wedge Zone provisions. These zones carry different secondary dwelling rules to the standard residential framework.
Which G-Flat™ Floor Plan Suits a Melton Block?
The Lana G-Flat™ at 9.9 metres by 6.1 metres is the most versatile choice for Melton’s standard rectangular blocks. It delivers a complete two-bedroom, one-bathroom layout within 60sqm.
The Lana 2 G-Flat™ adds a second bathroom. For Melton households building for older parents or extended family, the Lana 2 is consistently the preferred choice.
The Sirius G-Flat™ at 8.5 metres by 7 metres suits the wider, more open blocks found in Melton South and central Melton.
The Aurora G-Flat™ suits narrower blocks or situations where rear yard access is through a side corridor.
The Stella G-Flat™ suits corner blocks throughout Melton’s estate network.
You can see full images, dimensions and inclusions for all five floor plans on our G-Flat™ page.
For context on how similar rules apply in the neighbouring Wyndham south corridor, the Tarneit granny flat guide covers comparable planning and block conditions.
What Does a G-Flat™ Cost in Melton?
Melton sits within Innovista’s standard service area for most of the LGA. Packages typically start at approximately $198,000 for the Affordable finish and range up to around $265,000 for the Luxe finish.
The Homestead G-Flat™ at approximately $208,000 is distinctive in Innovista’s range for its concrete waffle slab and pitched tiled roof — a construction approach some Melton homeowners prefer for its slab-on-ground foundation in areas with reactive clay soils.
All prices are indicative only and may vary based on site conditions, design selections and council requirements. Always request a current written quote.
For properties more than 70km from Melbourne CBD — which applies to parts of outer Melton, Bacchus Marsh and rural properties in the Melton LGA — a 12.5 per cent regional surcharge applies. Our team confirms this during the site assessment.
The Next Step for Melton Homeowners
Innovista offers a free site assessment where our team visits your Melton property, checks your block dimensions and zone against the current planning rules and recommends the G-Flat™ floor plan that suits your situation.
The assessment is free. The advice is honest. And it is the fastest way to move from wondering what is possible to knowing exactly what you can build.