We're Not Just Better, We're Different

Expert Builders of Self-Contained Living Spaces - InHouse Granny Flats with 25 Years Experience.

Welcome to InHouse Granny Flats, where we redefine the construction experience. With over 25 years of expertise in the industry, we are proud to be your all-in-one solution for Granny Flats in Sydney. Our commitment to excellence sets us apart, offering a unique and reliable construction process that guarantees intelligent investment choices for property investors and families alike.

At InHouse Granny Flats, everything is done in-house, ensuring seamless coordination and unrivalled quality in every project we undertake. We do not rely on subcontractors, and our experienced team handles every aspect of the process, from property management and maintenance to renovations, new builds, and seminars. This comprehensive approach allows us to provide personalised service and flawless execution so that you can enjoy the benefits of increased rental income or expanded living space.

Choose InHouse Granny Flats for a truly distinctive experience, where our all-inclusive services bring your vision to life with precision and care. Discover the difference with us today and join the growing community of satisfied clients who trust InHouse Granny Flats for all their construction needs.

What makes us different?

Why Choose Us?

Our company is built on reputation and as we like to say, “we’re not just better, we’re different”. 
Discover Our 2 Bedroom In-House Granny Flat in Bidwell.

Experienced Team

Inhouse Granny Flats is an established company with over 25 years of experience in the construction industry.

Extra Inclusions

We offer distinctive style and exceptional quality interior and exterior inclusions with all our granny flat constructions.

Custom Designs

You’ll have over 2000 designs to choose from. Have something specific in mind? We can build something custom to suit your needs.

Satisfaction Guaranteed

We will help you throughout the entire process from start to finish. We pride ourselves in quality customer service.

Virtual Tour

Experience a captivating virtual tour walkthrough tour of a modern, stylish granny flat design. Immerse yourself in cosy living spaces, a sleek kitchen, and a comfortable bedroom, all meticulously crafted to maximise space and functionality. Discover the exceptional quality and attention to detail that sets our granny flats apart and envision the possibilities for your own investment property.

We Design

We offer a custom design process, allowing you to create a granny flat layout that fits your land and needs. With the help of our expert builders and architects, you can design your dream granny flat. Choose InHouse Granny Flats for a personalised experience.

We Build

Our self-contained dwellings increase rental income or provide extra living space, with no hidden fees and a range of inclusions. Our experienced builders handle the construction process from start to finish, making it a smart investment choice.

We Manage

We ensure hassle-free management of your new granny flat with pre-approved tenants, completed certificates, tailored management, routine inspections, and rent reviews.

Experience The Difference

Find out why we are different.

Latest Projects

Since its inception, Inhouse Granny Flats has serviced hundreds of families across Sydney. Our high-standard granny flats and affordable costs have built our reputation spreading through word of mouth that we're not better, we're different.


Do you have a property in mind to buy?



  • Ensure feasibility of investment
  • Avoid wasting time and money
  • Determine if a granny flat can be built before purchasing the property


  • Customise granny flat design
  • Ensure compliance with local council regulations
  • Assess land characteristics that can impact construction


  • Optimise investment
  • Increase rental income
  • Add value to your property
  • Provide additional living space for family or guests

Trusted by Hundreds of Clients

Open Home Registration

Register with us today and receive a weekly alert regarding future granny flat showings in your area.

Granny Flats Sydney FAQs

It usually takes approximately 6-8 weeks to gain Complying Development Approval. It is important to keep in mind that each property is different and in turn are assessed individually under the State Environmental Planning Policy, also known as the SEPP.

Private certifiers have authority to assess and approve the construction of granny flats. The benefit of gaining approval through a private certifier is that the process is much quicker than submitting documents through a local council. Once your granny flat is approved, the documents are still sent over to your local council for their records.

Private certifiers are qualified and professional entities that are entitled to issue approval and permits for construction proposals, either residential or commercial.

Yes. However, you will need to check with your local council to see if there are any restrictions, which may prevent a granny flat being built on your block. This is usually highlighted in the 10.7 Planning certificate (formally known as a 149 Planning certificate) that can be purchased from your local council. This document can also be located in the contract of sale of the property.

No. At Inhouse Granny Flats we specialise in custom designed granny flats to suit your property, however we also have over 2000 floor plan designs that you can select from. You will have the opportunity to sit with our design team to put together a concept.

The maximum size for a granny flat, built as a secondary dwelling, is 60 m2. An attached garage with a roller door can also be constructed.

Yes. All guidelines must comply with the current legislation which is called the Affordable Rental Housing State Environmental Planning Policy 2009, otherwise known as the ‘SEPP’. We can talk further about your property if we need to do a DA Approval.
If you comply under a CDC approval and your property is 450m2 the setbacks for a granny flat need to be:

  • 3 metres from the rear fence
  • 0.9 metres from the side fence

Yes. However, extra measures will need to be taken in consideration to ensure that proper fire-rated walls are built between the connecting walls.

No. We pride ourselves on no hidden costs at Inhouse Granny Flats. We provide a fixed price quote after we have completed a free site inspection on your property. Any additional costs that are not included are specified in our tender. This is our guarantee to you.


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