Building a granny flat – a self-contained small house on your own land can be a great investment opportunity or could provide your family with extra space for elderly parents or for young people who are ready to leave the parental home. You can change a large back yard into another living space, taking advantage of your property’s full potential.  

As experienced granny flat builders on the Central Coast, we are often asked a whole host of questions by our customers, particularly those who are embarking upon their first granny flat build. We have put together a list of the most common questions that our clients ask, to assist you in your research phase of the granny flat build process.

  1. How Much Land Do You Have Available?

The size of your land will determine the size of your granny flat, with a maximum inside space of 60 square metres allowable in NSW. Despite this size restraint, it is however, possible add balconies, verandahs, or other covered but not enclosed spaces to that if you want. If you have enough land available, a granny flat could be the ideal solution.

With large blocks increasingly hard to find in the current competitive property market, creative solutions are certainly something that we specialize in. So, if you are concerned about the small size of your block, don’t let it immediately turn you off this process.

  • What is Your Budget?

Building a granny flat is building a separate dwelling and is going to cost more than building a shed or just a shell without plumbing or electricity and all the fittings that turn a building from a shelter from the weather into a proper home.

However, there are many different styles and types of granny flats for a range of budgets. Work out what you can afford to spend on your granny flat before you start. Be clear with your builder about the budget and ensure the plans you have can be completed for that budget.

  • Investment, Family, or Business?

Paying careful attention as to the purpose of the build, in terms of your granny flat is essential for many reasons, including taxation and planning purposes.

If you are planning on using the granny flat as an investment, that is rent it out, you might want to plan where the granny flat is located in the yard, so that any potential tenants can have a separate entrance to the space such as a separate gate. If it is for a much-loved family member this may not be of as great importance, as you will want your family member close, and connected with all aspects of your family life, whilst still providing them with the ability to maintain their independence.

You may even decide to make a granny flat to use for your home business, giving you a separate space to see clients in. Whatever the purpose of your granny flat, knowing this up front may impact some decisions you have to make with the builder.

  • What is Included in the Price?

Pricing is always an important consideration. With budgets to stick to, the team at Coastal Granny Flats understand that generally people want the biggest bang for their buck! What we offer through our comprehensive build process, is a quality product, planned, designed, and constructed by a qualified and experienced team who truly care about your granny flat.


Pricing will naturally vary depending upon the size, location, and material construction, however with our extensive experience, we are confident we can provide you with competitive pricing, a customer focused collaborative design and build process and a truly beautiful result that is well suited to you and your needs.

  • What formal paperwork is required?

The beauty of working with an experienced builder such as Coastal Granny Flats is that we understand the planning permissions and paperwork and can assist you to navigate through this process. Council’s do have individual requirements that must be met, but with our focus always being on you and your needs, we can guide you through this process ensuring your paperwork is completely in order.

With over 36 years in the building and construction industry, 9 of those being specially constructing customized granny flats right here on the Central Coast, the team at Coastal Granny Flats are the regions premier choice when it comes to a granny flat addition to your home.

Our team are highly knowledgeable and experienced, focusing purely on you are your needs. With our customer-centric approach and our ability to work collaboratively with our clients, our granny flats add value and space to any home. Built using aesthetically pleasing designs, and completely customized to suit your property, our no one size fits all approach means your granny flat will be exactly what you need for your family.

Whatever your plans, get in touch today, and chat to a member of our friendly team about your options today!