Apollo
2 bed 1 bath 60 m²
From $169,900*
Granny flat builders · City of Hume
Granny Flats Sunbury
Xircon builds fixed-price granny flats in Sunbury, on old township blocks and new estate lots alike, from first plans to handover.
- City of Hume
- Postcode 3429
- about 38 km north-west of the CBD
Built on your block from $154,990*
Artist's impression Granny Flats In Sunbury: Quick Answers
- Price
- From $154,990* (one bedroom) to $184,900* (three bedrooms), fixed.
- Planning permit
- Most Sunbury granny flats of 80 m² or less, on a 300 m²+ lot, don’t need one. Xircon checks your block to be sure.
- Building permit
- Always needed. Xircon arranges it as part of your price.
- Maximum size
- 80 m² without a planning permit.
- Build time
- 10–12 weeks on site.
- Renting it out
- Allowed to anyone since December 2023, unless your estate’s title says otherwise.
Suburb snapshot
Sunbury At A Glance
Is your Sunbury backyard just sitting there, empty? That spare space could become a granny flat, built for family or rented out for extra income. Sunbury sits in the City of Hume, about 38 km north-west of Melbourne’s CBD. It’s one of Melbourne’s oldest towns, first settled in the 1830s, now ringed by new estates built under the Sunbury South and Lancefield Road plans.
Your block decides the rules. An old Sunbury block near the town centre plays by different rules to a new estate lot on its edge. Xircon checks which one applies to you, free, before you build anything.
With 3.4 people in the average household and 64.7% of homes carrying four or more bedrooms, Tarneit owners are increasingly looking to the backyard for extra room, or extra income.
- 38,851 residents at the 2021 Census ABS QuickStats, Sunbury (SAL22391), 2021
- 38 median age ABS QuickStats, Sunbury (SAL22391), 2021
- 2.6 people per household ABS QuickStats, Sunbury (SAL22391), 2021
- 42.7% of families are couples with children ABS QuickStats, Sunbury (SAL22391), 2021
- $1,925 median weekly household income ABS QuickStats, Sunbury (SAL22391), 2021
- 88.5% of homes are separate houses ABS QuickStats, Sunbury (SAL22391), 2021
Why a granny flat here
Why Sunbury Homeowners Add A Granny Flat
Artist's impression -
Older Blocks, More Room To Build.
Many of Sunbury’s older blocks are bigger than lots in Melbourne’s newest estates. That often leaves more backyard space for a self-contained granny flat.
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Keep Your Family Close
47.2% of Sunbury families are couples with children (ABS, 2021). A granny flat gives a grown child, a parent, or a carer their own space, without anyone having to move house.
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Two Train Lines In One Town
Sunbury station runs both the Metro Sunbury Line and the V/Line Bendigo service. A granny flat here can suit a tenant who commutes to the city, or a family member who does.
Council and estate rules · City of Hume
Granny Flat Rules In Sunbury
Your block decides your rules in Sunbury. An old block near the town centre follows one path. A new estate lot in Sunbury South or Lancefield Road may follow another. Contact us for free site inspection.
- Planning permit
- A granny flat of 80 m² or less skips the planning permit step on most Sunbury blocks, as long as the lot is 300 m² or bigger and carries no overlay.
- Lots under 300 m²
- On a smaller lot, the City of Hume asks for a planning permit before you start.
- Building permit
- Every granny flat needs one. Xircon handles the paperwork and folds the cost into your fixed price.
- Older blocks vs new estates
- Older Sunbury blocks rarely carry a covenant against a second dwelling. Newer estates in the growth areas sometimes do. Xircon checks your title either way.
- Overlays and easements
- Drainage and waterway reserves near Tarneit's creeks can carry a flood or drainage overlay that limits where the flat sits. Check your lot on VicPlan, or we check it for you.
- Growth-area levy
- Sunbury South and Lancefield Road sit under an Infrastructure Contributions Plan from 2022. It may add a charge to your building permit fee. We confirm this at your free inspection.
- Other rules
- No second car space. No mains gas. A path from the street is required. You can’t sell the flat separately from the house.
Designs
Granny Flat Designs For Sunbury Blocks
Looking for the best granny flat designs for your Sunbury block? Xircon builds one, two and three-bedroom granny flats, all 80 m² or less under Victoria’s current rules, sized to fit older township blocks and new estate lots alike.
Portsea
2 bed 2 bath 60 m²
From $179,900*
Mornington
3 bed 1 bath 60 m²
From $184,900*
Queenscliff
2 bed 2 bath 60 m²
From $179,900*
Inverloch
2 bed 1 bath 60 m²
From $169,900*
Torquay
2 bed 2 bath 60 m²
From $179,900*
Prices
Granny Flat Prices In Sunbury
Fixed from prices, built on site, with plans, the building permit, connections up to 12 m and our Signature Inclusions in the price.
- 1 bedroom · 40 m² from $154,990* Lorne, Anglesea
- 2 bedrooms · 60 m² from $169,900* Sorrento, Rosebud, Flinders, Apollo, Inverloch
- 2 bed + 2 bath · 60 m² from $179,900* Portsea, Queenscliff, Torquay
- 3 bedrooms · 60 m² from $184,900* Mornington
On a standard, level site. Your site costs are fixed in writing after the free site inspection.
How we build
From Your First Call To Moving In
Five steps, one Sales Consultant, and a fixed price before anything is built.
- 1
Free Site Inspection
We check your block, zoning, overlays and access, and show you which designs fit.
- 2
Fixed-Price Quote
You get a written price for your site. The price we quote is the price you pay.
- 3
Plans And Permits
We prepare the drawings, engineering and energy report, and arrange your building permit.
- 4
Built On Site
Slab, steel frame, roof and finishes, built by our trades in 10–12 weeks on site.
- 5
Move In Or Lease
Handover with a 12-month maintenance period. Ready to live in or rent out.
Artist's impressionFree site inspection
Find Out What Your Backyard Can Do
One visit from a Sales Consultant, at no cost and with no obligation. You'll know:
- Which designs fit, and where
- Whether you need a planning permit
- Your fixed price, in writing
Prefer to talk now? Call 1800 XIRCON (1800 947 266)
Book Your Free Site Inspection
Thanks, You're Booked In
A Sales Consultant will call you within one business day to arrange a time for your free site inspection.
Open the PDFLocal FAQ
Granny Flats In Sunbury: Your Questions
What Sunbury homeowners ask us most. Still unsure? Ask a Sales Consultant.
Updated 18 October 2026
Do I Need A Planning Permit For A Granny Flat In Sunbury?
No, not usually. On a lot of 300 m² or more with no overlay, a granny flat of 80 m² or less skips the planning permit step. You still need a building permit, which Xircon arranges.
Does An Older Sunbury Block Have Different Rules To A New Estate?
Yes, often. Older blocks near the town centre usually have no title covenant against a second dwelling. Some new estates in Sunbury South or Lancefield Road do. Xircon checks your title before you choose a design.
What Is The Infrastructure Contributions Plan For Sunbury South And Lancefield Road?
It’s a council charge that funds roads, parks and other services for new estates. It was gazetted in 2022. It may add a fee to your building permit, which Xircon confirms at your free inspection.
How Big Are Sunbury Households?
The average Sunbury household has 2.6 people (2021 Census). Close to half of all Sunbury families are couples with children, one reason owners add a granny flat for a grown child or a parent.
Can I Rent Out A Granny Flat In Sunbury?
Yes, to anyone, since December 2023. A covenant on a new estate’s title can still block a second dwelling altogether. Xircon checks this first.
What’s Included In Xircon’s Granny Flat Price In Sunbury?
Plans, the building permit, service connections up to 12 m, and Xircon’s Signature Inclusions. Site costs are confirmed in writing after your free inspection.
What Should I Budget For Beyond The Advertised Price?
Any growth-area levy still owing on your lot, council fees, site costs beyond the standard allowance, and any variations you choose.
Keep planning
Granny Flat Guides
Nearby
We Also Build Near Sunbury
- Narre Warren South
- Berwick
- Officer
- Clyde
- Cranbourne North
- Cranbourne East
Local facts checked 18 October 2026. Sources:
See What Fits Behind Your House
One free visit: which designs fit, what permits you need, and a fixed price in writing.
Notes And Conditions
- Prices from $154,990 (40 m², one bedroom) to $184,900 (60 m², three bedrooms), on a standard, level site with easy access, including our Signature Inclusions and service connections up to 12 m each. Additional site costs, council and authority fees, and variations are extra. Your Sales Consultant confirms a site-specific, fixed-price quote after a free site inspection.
- Estimated market rent only, not guaranteed. Actual rent depends on location, design, market conditions and tenancy. Seek independent financial advice.
- On-site construction only, from slab pour to practical completion. Excludes planning and building permit timeframes, weather delays and site-specific conditions.
- Xircon Homes guarantees apply to granny flat building contracts, subject to their published terms and eligibility. See xirconhomes.com.au/our-guarantees/.
- * Prices, price ranges and rental estimates marked with an asterisk are indicative and subject to our terms and conditions. Your Sales Consultant confirms a site-specific, fixed-price quote after a free site inspection.