Do you need more space? Have you considered a separate build on your Blue Mountains, Lithgow or Penrith property? Building a granny flat is a great way to provide separate living spaces for elderly relatives or guests. Relatives and guests can keep their independence and you can keep your privacy.

They are also perfect as kid’s retreats, project rooms or games rooms – you can keep all the noise away from the main house.

With our granny flat designs, you can have a separate single/project room built on your property or a completely separate lifestyle dwelling with bedroom, kitchen and living areas and a laundry.

And granny flats are the perfect solution to property investing – Don’t want the hassle of buying a rental property? Then build one in your own backyard.

 Because Granny Flats can also be an extra source of income

granny flats blue mountains

Laws in NSW allow you to rent out granny flats so you can off-set the costs of building a granny flat and quite often, positively gear the new build. This can help you can pay your mortgage off quicker and increase your wealth (don’t forget to have financial advice to make sure this option suits your needs).

The benefits of Bonza Homes granny flats designs is that we have extensive experience and skills in building large, one and two storey homes – and we bring all that experience and knowledge to build your granny flat.

So, all of our granny flats are new builds – they are not pre-fabricated or modular kit buildings. You also have a fixed price with no hidden costs – and no unexpected blow-outs.

And don't worry about council approvals and fees – we will take care of all of that for you – we provide a full service to all of our clients. Whether you’re in Penrith, Lithgow or anywhere else across the Blue Mountains – we’ll help you build an affordably, quality granny flat.

So what do you get when building a granny flat with Bonza Homes?

  • An Architect designed building
  • Customised to your specific needs
  • Built using only quality materials and fixtures
  • With superior finishes
  • And high-quality interiors and fit-outs
  • A full design and colour consultation
  • A 7 year structural guarantee
  • And very flexible design options – customised to your requirements
  • Full project management
  • All trades included in a fixed price


Our granny flat designs can be fitted with disability aids inside to make living easier – with an entry ramp for easy wheelchair access if needed. And if you need wider doorways – just let us know and we will customise the design to suit your specific needs. We’ve done granny flat designs for properties in Penrith, Lithgow and the Blue Mountains so we know exactly what it takes to build stable, attractive granny flats in the area.

As a separate dwelling, our Bonza Built granny flat Includes:

  • Cornices, skirting boards
  • Aluminium window frames
  • Metal roof
  • Lighting fixtures
  • Hot water system
  • Quality tap ware and accessories
  • Fit-outs for the kitchen, laundry and bathroom
  • Your choice of floor coverings


Anything you want is included in one fixed price. So you know what your costs are upfront.

And you select the design of the building and all the interior fittings – from sinks to cupboards, the stove, tiles, light fixtures, paint colours, you select what you want and we build it.

At Bonza Homes we provide an all-inclusive service - right from preparing the plans for council submission to turning out the lights after handover.

Top quality granny flat designs in Penrith, Lithgow & Blue Mountains – contact us today

If you are looking for a new home builder across Blue Mountains, Lithgow and Penrith or want more information about new homes, granny flats, or acreage homes, call Bonza Homes on 1300 733 052 or complete our enquiry form.

Bonza Homes build your home on time and within budget