Australia 2026
Granny Flat Providers
Compare builders for granny flats, secondary dwellings, kit/prefab builds, custom designs, and accessible dwellings before you request quotes.
Provider compare snapshot
Shortlist by build type, coverage, and price band
Compare turnkey builders, prefab specialists, custom designers, and state-specific granny flat companies before you request quotes.
Providers tracked
5
From (1-bed)
$44,000
2-bed from
$108,000
Granny Flat Solutions
Sydney, NSW · Est. 2009
Australia’s largest dedicated granny flat builder operating across Greater Sydney and regional NSW. Established operation with over 3,000 granny flats built, offering turnkey packages from design through to council approval and handover.
From
$58,000
Coverage
5 cities
Best For
Sydney and NSW homeowners wanting a proven, established builder with end-to-end project management and strong council approval expertise
Price ranges
Pros
- +Australia’s largest specialist GF builder with proven track record
- +Full turnkey service from CDC/DA through to handover
- +Wide range of standard and custom designs
- +Strong understanding of NSW council requirements
Cons
- –Premium pricing compared to smaller local builders
- –Limited to NSW — not available in other states
Matt’s Homes & Outdoor Designs
Melbourne, VIC · Est. 2012
Melbourne-based modular and prefab granny flat specialist offering factory-built units delivered and assembled on site. Known for fast build times and competitive pricing on standardised modular designs.
From
$52,000
Coverage
5 cities
Best For
Melbourne and VIC homeowners wanting a fast, affordable prefab or modular granny flat with good quality control and predictable pricing
Price ranges
Pros
- +Strong modular and prefab expertise with factory quality control
- +Competitive pricing on standardised designs
- +Fast build times — 8–12 weeks for prefab units
- +Good coverage across VIC including regional areas
Cons
- –Limited design customisation on prefab models
- –Less suitable for complex or sloping sites
Backyard Grannys
Brisbane, QLD · Est. 2014
Brisbane-based granny flat builder specialising in Queensland council compliance and subtropical design. Strong expertise in raised-floor construction, cross-ventilation design, and flood overlay compliance across South-East Queensland.
From
$4,800
Coverage
5 cities
Best For
Brisbane and SEQ homeowners wanting a local specialist who understands Queensland council requirements, flood zones, and subtropical design
Price ranges
Pros
- +Deep expertise in QLD council compliance and flood overlay requirements
- +Specialist subtropical designs with covered outdoor living
- +Experienced with raised-floor (stump) construction for sloping sites
- +Strong local reputation across South-East Queensland
Cons
- –Limited to Queensland — not available in other states
- –Smaller operation means longer wait times in peak season
Classic Granny Flats
Perth, WA · Est. 2011
Perth-based turnkey granny flat builder offering design-to-build packages across Western Australia. Known for competitive pricing on standard designs and strong project management from initial feasibility through to handover.
From
$13,500
Coverage
5 cities
Best For
Perth and WA homeowners wanting a reliable turnkey builder with competitive pricing and strong local knowledge of WA planning requirements
Price ranges
Pros
- +Strong turnkey design-to-build offering for Perth metro
- +Competitive pricing with transparent quoting
- +Good understanding of WA ancillary dwelling requirements
- +Range of standard and custom design options
Cons
- –Limited to WA — not available in other states
- –Custom designs take longer — allow extra lead time
Rescon Builders
Adelaide, SA · Est. 2008
Adelaide-based residential builder offering both custom and kit granny flat options across South Australia. Known for flexibility in design approach and competitive pricing in the Adelaide market.
From
$38,000
Coverage
5 cities
Best For
Adelaide homeowners wanting flexibility between custom and kit builds at competitive South Australian pricing
Price ranges
Pros
- +Flexible approach offering both custom and kit options
- +Competitive Adelaide pricing — among the most affordable of major cities
- +Good understanding of SA Planning and Design Code requirements
- +Strong renovation and extension capability
Cons
- –Smaller operation than eastern state specialists
- –Limited regional SA coverage outside Adelaide metro
How to Choose a Granny Flat Builder
Check their council approval track record
A good granny flat builder should handle the entire approval process. Ask how many CDCs or DAs they have successfully lodged. Builders who regularly work with your local council will avoid costly mistakes and delays in the approval stage.
Visit completed builds
Ask to inspect completed granny flats at 6 and 12 months post-handover. This shows how the build has weathered and whether finishes have held up. Most reputable builders have a portfolio of completed projects they are happy to show prospective clients.
Understand what is and is not included
Turnkey quotes should specify everything from slab to handover. Watch for exclusions like site preparation, services connection, landscaping, air conditioning, and council fees. Always compare quotes on the same full scope to avoid surprises.
Get at least three quotes
Granny flat pricing varies 20–40% between builders for equivalent specifications. Three detailed quotes help you identify the market rate and spot outliers. Compare like for like on size, finishes, inclusions, and approval pathway.
Check insurance and licensing
Confirm your builder holds a valid residential building licence for your state, has Home Building Compensation insurance (or equivalent), and carries adequate public liability insurance. These protections are essential for any build over $20,000.
Ask about warranty and defects period
Most states require a structural warranty of 6 years and a non-structural warranty of 2 years on new builds. Confirm the warranty terms in writing before signing. Ask about the defects rectification process after handover.
Need pricing first?
Start with the cost guide to understand granny flat costs before comparing providers.