Browse our range of 3 Bedroom granny flat floor plans, thoughtfully designed to maximise space while supporting comfortable everyday living, changing family needs and future flexibility.
A three-bedroom layout gives you room to adapt, whether that means welcoming family, creating a comfortable home for parents, accommodating guests or renting it out.
With strong rental demand across Sydney, a quality 3 bedroom granny flat can generate around $650 to $850 per week, depending on the suburb and property features.
Low-maintenance home that can be more affordable to build and easier to manage over time than a larger extension.
All designs are thoughtfully planned to stay within the 60m² complying development size limit, making efficient use of every square metre.
A smart example of how 3 Bedroom can fit comfortably within (60m2)
A spacious layout gives this 3 bedroom floor plan a comfortable, open feel, with 1 bathroom and a generous open-plan kitchen, dining and living area.
typical floor area, excluding patio/garage area
our turnkey builds from
Compact designs from 36–50m², ideal for singles, couples or a dedicated home office.
Our most popular size, offering a strong balance of rental potential and comfortable everyday living at 50–60m².
Maximum space within the 60m² SEPP limit, ideal for families, visiting relatives and multi-generational living.
Get practical answers about building a granny flat, from costs and floor plans to approvals and construction timeframes.
A 3 bedroom granny flat is usually designed to make efficient use of a compact footprint. Granny Flats X lists typical 3 bedroom granny flats at around 65 to 80m², although standard NSW secondary dwelling rules generally limit floor area to 60m² unless a larger size is permitted under another planning instrument. The right size will depend on your block, design and approval pathway.
A turnkey 3 bedroom granny flat in Sydney typically costs around $175,000 to $220,000+. The final price depends on the design, site conditions, finishes, approvals and service connections. A site assessment is the best way to get a more accurate estimate for your property.
Rental income varies across Sydney, but a well-designed 3 bedroom granny flat may achieve around $650 to $850 per week, depending on the location, condition, privacy, access and features. Actual rent should always be checked against current local listings before you build.
A 3 bedroom granny flat is well suited to larger households, ageing parents, adult children, regular guests or families who want more flexible living space. The third bedroom can also be used as a home office, study or guest room if your needs change over time.
Yes. A 3 bedroom granny flat floor plan can usually be adjusted to suit your block, lifestyle and priorities. Changes may include room sizes, storage, kitchen layout, bathroom position, entry points and outdoor areas, provided the final design still meets planning and building requirements.
Not always. Some granny flats can be approved through a Complying Development Certificate, or CDC, instead of a full Development Application. For the standard NSW complying development pathway, the property generally needs to be at least 450m² and meet other planning and site requirements. Properties that do not qualify for CDC may still be able to proceed through a DA.
Yes, but the floor plan needs to be carefully designed. With three bedrooms competing for space, room proportions, storage and open-plan living need to be balanced so the home remains comfortable and practical. Granny Flats X notes that 3 bedroom layouts require especially careful planning because space can become tight quickly.
The timeframe depends on the design, approval pathway, site conditions, weather and availability of materials and trades. The overall process also includes site assessment, design, approvals and construction, so it is best to discuss a project-specific schedule before work begins.
A typical 3 bedroom granny flat includes three separate bedrooms, a bathroom, kitchen and open-plan living and dining area. Depending on the design and package, you may also include built-in wardrobes, internal laundry, additional storage and an outdoor living area.
Yes. A well-planned 3 bedroom granny flat can work well for parents, adult children or small families who want a self-contained home close to the main residence. When choosing a design, consider bedroom privacy, storage, natural light, accessibility and enough living space for everyday use.
