100% Free for owner-builders

Free granny flat plans, estimates & owner-builder tools.

Everything you need to plan, price and manage your granny flat build — completely free. Then, if you want a hand, the Granny Flat Team can help you build it and save $60,000–$100,000.

Browse Free Plans Get a Free Estimate
Ready-to-use floor plans Live Bunnings pricing Free project dashboard
What you get, free

Four free tools to build smarter

No sign-up walls, no catch. Use as much or as little as you like.

Granny Flat Plans

Proven 1 & 2 bedroom floor plans with elevations, framing and wet-area details.

View plans

Instant Estimates

Itemised cost estimates built on live Bunnings pricing — download as a PDF.

Estimate my build

Owner-Builder Dashboard

Track budget vs actual, store invoices and manage every category of your build.

Open dashboard

Building Tips

Approvals, adaptable housing, owner-builder licensing and money-saving know-how.

Read the tips

Owner-builders save $60,000–$100,000

By managing your own granny flat build with the right plans, pricing and trades, you keep the builder's margin in your pocket. Our free tools are designed to make that realistic — even if you've never built before.

$60k+
typical saving
2
ready plans
100%
free tools
Why are the plans free?

Because granny flats are part of the housing solution.

There's a housing crisis, and granny flats are part of the answer — but building is expensive, especially under a fixed-price contract. Our contribution to cutting those costs is simple: we give free plans, free estimates and a free management dashboard to any owner-builder taking on a granny flat project. Use them with no strings attached. If you'd like a hand building it, the Granny Flat Team is here — but the tools are yours either way.

Start with a free plan
How it works

From idea to keys in four steps

1

Pick a plan

Choose a 1 or 2 bedroom design that suits your block.

2

Get your estimate

See an itemised cost built on live material prices.

3

Track your build

Manage budget, invoices and trades in the free dashboard.

4

Build it (with help)

DIY, or let the Granny Flat Team's trades do the heavy lifting.

Free plans

Popular granny flat designs

1 Bedroom Granny Flat

1 Bedroom Granny Flat

~50 m² 1 Bed 1 Bath

A compact, self-contained one-bedroom design — open-plan living, full kitchen and accessible bathroom. Ideal for rental income, a home office or extended family.

View plan & photos
2 Bedroom Granny Flat

2 Bedroom Granny Flat

~70 m² 2 Bed 1 Bath

A generous two-bedroom layout with separate living, a full kitchen and a family bathroom. Great for larger tenants or multi-generational living.

View plan & free estimate
See all free plans
Free, no obligation

Get a free granny flat quote

Tell us a little about your block and we'll send you a tailored plan, estimate and next steps — free. Building it yourself or want a hand? Either way, we'll help.

Get My Free Quote
Or call 0403 370 551