Get inspiration from our recent granny flat projects across Sydney and surrounds — and see how we’ve turned different properties into practical new spaces.
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The things Sydney homeowners ask us most. Can’t find yours? Call us — we’ll give you a straight answer.
Yes. A granny flat floor plan can be customised to suit how you want to use the space and the characteristics of your Sydney property. 1-, 2- and 3-bedroom granny flat designs can be adjusted in areas such as room sizes, bedroom placement, living areas, kitchen and bathroom layouts, entry points and indoor-outdoor flow. Granny Flats X specialises in custom layouts, and many of our projects feature floor plans tailored to the individual property and homeowner’s needs. The final design still needs to meet the relevant site, structural and planning requirements. Explore our custom granny flat projects to see examples of custom designs.
Yes, building a granny flat for rent can be a smart way to make better use of your Sydney property while creating an additional source of rental income. As a general guide, a well-presented 1- or 2-bedroom granny flat may achieve around $550–$750 per week, depending on the suburb, size, condition, privacy, parking and features. Current Sydney listings show that rental values can vary considerably between locations.
As a general 2026 guide, a studio or 1-bedroom granny flat may cost around $120,000–$145,000, a 2-bedroom around $145,000–$180,000+, and a 3-bedroom around $175,000–$220,000+ on a turnkey basis. These figures are a starting point rather than a fixed price, as every Sydney property has different requirements. The final budget can be affected by the size and layout, level of finishes, site access, ground conditions and approval requirements. Costs may also increase where the project involves excavation, retaining walls, demolition, difficult access, service connections or other additional site works.
Sydney granny flat designs are available in 1-, 2- and 3-bedroom layouts, with options for different floor-plan configurations, facades and features. The most suitable design will depend on the size and shape of your block, how you intend to use the granny flat and the relationship with your existing home. Site factors such as access, privacy, outdoor space and planning requirements can also influence the layout and overall design.
A granny flat in Sydney typically takes 3–4 months to build, with straightforward design and approval taking around 1–3 weeks. More complex projects can take longer depending on the approval pathway, site conditions, access, engineering and required site works. The exact timeframe is confirmed once the property and design have been assessed.
Some granny flats in Sydney can be approved through a Complying Development Certificate (CDC) instead of a traditional development application, provided the property and proposal meet the NSW Housing SEPP standards. For the standard CDC pathway, the lot generally needs to be at least 450m² unless the secondary dwelling is located entirely within an existing dwelling. If the proposal does not meet the complying development requirements, a development application or another approval pathway may be needed.
