1 Bedroom Granny Flat Floor Plans: Six Published Designs to Compare

Compare 1 bedroom granny flat floor plans by how the rooms work for the person living there, then check whether the design fits your site. The six examples below are published supplier designs with links to their drawings or plan pages. They give you something concrete to discuss with a designer, without treating a brochure area as proof of approval or a finished-build price.

By The Granny Flat Guide Team. Supplier pages checked 4 October 2026. This is a desk review of published information, not a site inspection or an endorsement of a builder.

Six published one-bedroom plans

Areas below use the suppliers’ labels. Measurement methods aren’t standardised in this comparison, and outdoor areas may be treated separately. Ask for dimensioned drawings and an explanation of the quoted area before comparing prices per square metre.

The four WA entries are listed in the supplier’s one-bedroom catalogue. The last column contains our suggested comparison questions, not claims that a particular design passes or fails them. Download the current drawing and check the revision with the supplier.

Two drawings with published overall dimensions

The linked Investor Special PDF shows an overall 7.5 m × 4 m outline for its stated 30 m² design. The Dianella version 2 PDF shows 8 m × 6 m for its stated 48 m² design, with bedroom, walk-in robe, living, dining, kitchen and bath labels and a washing-machine position. These are overall dimensions, not verified internal bedroom clearances.

Both drawings carry a 2017 title-block date and variation entries through 6 October 2017. Their website upload folders do not establish a new drawing revision. Ask the supplier for the current dimensioned version before relying on either outline for site fit.

The other linked designs have supplier-stated areas, but this comparison does not establish all internal room dimensions. Add your bed, open wardrobe doors and appliances to a dimensioned drawing. Keep those checks separate from the supplier’s area label and the approval authority’s area calculation.

Put your furniture on the drawing

Start with the items you already own or genuinely intend to buy. Mark the bed, bedside storage, sofa, dining arrangement, fridge and washing machine at their real dimensions. A room name on a brochure doesn’t tell you whether your furniture fits comfortably.

Then draw the doors open. Check the route from the entrance to the bedroom and bathroom, and whether cupboards or appliance doors block that route. Ask the designer to show the clearance needed to use and maintain appliances, rather than fitting their closed rectangles into the plan.

Do this before paying for custom changes. If the first version requires replacing most of your furniture, include that in the budget. If you need mobility equipment or assistance, give the designer those requirements early and ask for a suitable access assessment.

Test privacy and daily chores

Trace an ordinary day: entering with groceries, cooking, taking a shower, hanging washing and answering the door. Consider who can see into the bedroom when the entry is open, and whether guests need to pass through private space to reach the bathroom.

For laundry, decide whether you need an internal machine, a dryer, outdoor drying or access to facilities elsewhere on the property. The Seaforth page explicitly describes a separate internal laundry; its actual size and appliance arrangement still need checking on the selected drawing. Don’t assume that every design labelled “self-contained” includes the laundry setup you want.

Write down storage needs that are easy to overlook: bedding, a vacuum, cleaning equipment and seasonal belongings. Ask where those things go without using circulation space. Our interior planning guide can help you develop that brief.

Fit the design to the property before choosing finishes

Ask for the proposed dwelling to be placed on a site plan showing the main house, boundaries, access and relevant services. A rectangular brochure plan can look suitable in isolation while its entrance or windows face the wrong part of your property.

Give the designer your priorities for privacy, daylight and outdoor use. A mirrored plan might change the relationship between the living room and the garden, but it also changes where doors, windows and services sit. Request a marked drawing rather than assuming that flipping a brochure solves the problem.

Supplier location and advertised floor area don’t establish permission to build on your block. Use our state rules guide to identify the relevant starting point, then confirm the current requirements with the council or appropriate approval professional. Keep that approval assessment separate from the supplier’s sales estimate.

Compare quotes for the same finished outcome

Ask each supplier to identify the drawing, revision, area and inclusions covered by its quote. The Elliston page labels its advertised starting price as lock-up stage only. That is a different scope from a completed dwelling ready to occupy, so comparing those headline prices directly would mislead.

Request separate details for site preparation, foundations, service connections, approvals, delivery, construction and final fit-out. Mark anything excluded or still awaiting assessment. Use our cost breakdown as a checklist, then get amounts for your actual project.

A smaller published area doesn’t prove a lower completed price. Save the room and site requirements in the project planner. Choose two or three plans that meet your living requirements and obtain comparable site-specific quotes before paying a deposit.

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