Granny Flat Design
Buildana Ilyas
50m² · 1 bed · 1 bath · indicative $179,000 from
All floor plans and room sizes are fully customisable.
About this design
50m². 1 bedroom, living space, porch, bathroom and separate laundry. The Ilyas is exactly what it looks like — a well-proportioned secondary dwelling that won't overcomplicate your approval or your build. Customise the finishes to suit your brief.
Ilyas is heritage and spirituality—a subtle, direct name. This 50m² design has that same quality. One bedroom, one bath, built without pretence but with genuine care. Buildana's reputation is built on that kind of integrity. You get what you need. Nothing wasted. Nothing compromised.
This design proves that smaller doesn't mean cheap. It means thoughtful.
Room dimensions
What's included as standard
Standard inclusions on the Ilyas cover bathroom, kitchen, bedroom and living. The spec is solid — proper materials, not builder's grade dressed up as premium. Everything listed is included in the base build.
Bathroom Inclusions
- •Floor to ceiling wall tiles, including 300 x 600 ceramic tile options.
- •Stylus Banksia back to wall dual flush wc.
- •750mm polyurethane vanity with stone top, drop-in sink & mirror over.
- •Look vanity and shower mixers.
- •Look towel rail & toilet roll holder.
- •Framed shower screen.
- •Light, fan and heater combination.
Kitchen Inclusions
- •Sprayed polyurethane doors and panels (any colour of your choice).
- •10m cabinets includes upper, lower & overhead fridge cabinets & pantry.
- •600mm full length pantry with microwave space.
- •Laminate benchtop, tiled splashback – includes 300 x 600 options.
- •Westinghouse oven and ceramic cooktop (gas cooktops where available).
- •Ducted slide out rangehood (Euromaid), Clark 1 3/4 bowl with ‘look’ mixer.
Upgrade options
Tick what you want — your indicative total updates live. Final fixed price comes back in your formal proposal after a site assessment.
Exterior finish system
Choose the wall system for the external envelope. Pricing below is calculated against this design's external wall area — approximately 64m² (perimeter 28.0m × 2.7m wall height, less 15% for openings). Standard polystyrene-render is included; Hebel, face brick and brick-render are priced as upgrades over standard.
Foamboard polystyrene cladding system finished with cement render and texture coat. Included in the base price — light, fast to install, and the standard exterior on every Buildana granny flat.
Ceiling height
Standard ceiling height is 2.4m. Higher ceilings make small footprints feel larger and lift natural light through windows. Pricing below is calculated against this design's external perimeter 28.0m, covering the extra wall framing, plasterboard, render/cladding and cornice/painting needed to raise the envelope.
Standard ceiling height across all Buildana granny flats — already 100mm taller than the BCA minimum for habitable rooms. Included in the base price.
Doors & highlight windows
Door height and highlight-window upgrades. Tall doors are typically chosen alongside the 2.7m or 3.0m ceiling upgrade so the proportions stay right.
Slim 300 x 600mm highlight windows for natural light to bathrooms, ensuites, hallways, walk-in robes or above kitchen benches. Frosted or clear glazing. $1,100 each, supplied and installed. Pick how many you'd like below.
Premium fitout
Lift the standard spec to higher-end finishes.
Air conditioning
Choose how the granny flat is cooled. The standard living split is included in your base price.
Included as standard. Wall-mount inverter split unit to the living area, sized to the room load.
Outdoor & site
Pricing varies with site conditions, falls, and existing services. Final figures confirmed in writing after a site visit.
Compliance, services & metering
Almost always required for tenanted secondary dwellings. Pre-ticked by default.
Add-on rooms & layout changes
Layout extensions are quoted from your block survey — they may need a fresh CDC/DA pathway.
Common questions
Is Ilyas the right design for a single elderly parent?
It's the most common brief for Ilyas, yes. One bedroom, one full bathroom, generous living and meals — and because the second bedroom is gone, the living area gets the floor space instead. That's a more comfortable day-to-day footprint for one person than a 2-bed layout where the second room ends up as storage anyway.
Will the Ilyas fit on my block?
Under SEPP (Housing) 2021 you can build a secondary dwelling up to 50m² on residential lots of 450m² or more in NSW, with required setbacks (typically 3m rear, 0.9m sides). The Ilyas's built footprint sits inside that envelope. We do a free block check off your title plan before you commit — it tells us in writing whether the Ilyas fits and which approval pathway (CDC or DA) applies.
How long does it take to build the Ilyas?
Allow about 14–18 weeks on site once the slab is poured, plus 6–10 weeks for design, engineering, BASIX, CDC or DA, and pre-construction. Total wall-clock from signed proposal to handover is typically 5–7 months for the Ilyas, weather and council pace dependent. We update the program weekly during construction so you can see exactly where the build is up to.
What's actually included in the Ilyas base price?
The base price covers the dwelling itself — slab, frame, roof, exterior cladding, full internal fitout, all standard inclusions listed on this page, plus our fixed builder margin and warranty. What's not in it: site costs (excavation, retaining, rock removal), council/CDC fees, separate metering, BASIX upgrades beyond the minimum, and any structural alterations to the existing main dwelling. Site costs get quoted off a real assessment, not a postcode generic.
Request a formal proposal for the Ilyas
Pick your upgrades, send through your details, and we'll come back with a fixed-price proposal — usually within 3 business days.