Four Bedroom Granny Flats

Four bedroom granny flats provide a number of possibilities as to how to use additional space. Whether you are thinking of constructing a granny flat as a rental opportunity or to increase space for your family, a four bedroom granny flat design will give you plenty of options. 

What is a granny flat?

While granny flats take their name from their use as accommodation for elderly relatives, the term can refer to any self-contained dwelling built on the same plot as a main house. While they are usually detached or separate from the main house, they can be either attached or detached with many granny flats built onto an existing home as an extension. 

How big can my granny flat legally be? 

The size that your four bedroom granny flat is allowed to be depends on your local council. In Western Australia, the Cook government has relaxed building requirements in a bid to boost housing supply, so planning approval is not required for compliant granny flats up to 70m2. Any granny flat will need to meet the requirements for being set back from the road and must not exceed 70m2. 

It is vital to check with your local council, as some councils will allow bigger granny flats to be built, as long as planning approval is sought. 

What are the benefits of choosing a four-bedroom granny flat? 

Drawing up plans to make your granny flat a four bedroom will net you a higher rental yield, as you’ll appeal to the family market. Whether you decide to market your granny flat as a long term rental or prefer to consider the Airbnb market, more rooms allows you to appeal to a larger market, and charge more. 

If you are not interested in renting out your four bedroom granny flat, and prefer to keep it for either close or extended family, a larger flat allows any resident more space to feel at home. But there are a number of possible uses for your granny flat. A four bedroom granny flat design could incorporate a games room, home gym, screening space, rumpus area, home office or any number of other breakout spaces. 

How long will it take to build?

The larger and more complex the project, the longer it is likely to take. This means a four bedroom granny flat is likely to take more time to construct than a smaller granny flat or a tiny house. You will also have to factor in permits and approvals and the availability of tradies and materials. When you embark on a build, make sure your builder or contractor gives you a clear timeframe because a build of any size can take anything from a few months to several years. 

How much will it cost?

Again, the cost of a four bedroom granny flat will depend on its specific design, as well as its fixtures and fittings. This makes it difficult to give a precise figure as to how much your  build will cost. Depending on the project, however, the budget may be between $100,000 and $300,000, but this will of course be affected by your design, the complexity of your build and how high-end you decide to go on fixtures and fittings. 

Four bedroom granny flat designs 

In order to qualify as an ancillary dwelling, a granny flat needs to have a self-contained living space, including a bedroom, kitchen, bathroom and living area, as well as a separate entrance. Beyond that, the design choices and house plans are up to you. A four bedroom granny flat certainly gives you space to play with. Here, at Granny Flats WA, we have a selection of ready-made granny flat designs, or we can tailor a design based on your specifications. Why not contact us for a free consultation or stop by our showroom, where we can answer any questions you might have.