Three and four-bedroom granny flats are one of the largest and most versatile options available. Their higher number of bedrooms allows creates flexible living arrangements and significantly boosts property value. Granny Flats WA has ready-made designs available, but we are also a specialist custom granny flat builder. Scroll down to see a selection of our three and four-bedroom designs.

Costs

The cost of building a three or four-bedroom granny flat will be affected by materials used and the size of the granny flat.

Costs of a three-bedroom granny flat

Three-bedroom granny flats typically cost more than other granny flat types due to their larger size and higher number of bedrooms.

Costs of a four-bedroom granny flat

Four-bedroom granny flats are typically the largest, resulting in the highest cost amongst granny flat types.

Give our team a call for an obligation-free quote to get a personalised breakdown of projected building costs.

Requirements

The requirements for a granny flat are primarily based on having another property on the lot and making sure there is space to build a granny flat. There was previously a minimum lot size, but this will be eliminated in April 2024 when the new legal amendments take effect. However, more space is still beneficial for larger granny flats. Granny flats of all sizes must meet the primary criteria and get building approvals.

Requirements for a three-bedroom granny flat

Three-bedroom granny flats are often relatively large. This means that they are more suited to being build next to a property with a bigger backyard area.

Requirements for a four-bedroom granny flat

Four-bedroom granny flats are typically the largest granny flats built, making them more viable for properties with a greater amount of available space.

Benefits

Three or four-bedroom granny flats can provide benefits in the form of increased property value, rental yield and flexible use of rooms.

Benefits of a three-bedroom granny flat

Three-bedroom granny flats offer increased space, privacy and flexibility compared with two-bedroom granny flats. More bedrooms provide the opportunity for more tenants or repurposed rooms. Three-bedroom granny flats give a solid boost to property value thanks to their size and bedroom count.

Benefits of a four-bedroom granny flat

Four-bedroom granny flats offer the highest level of privacy and flexibility among granny flat types. They can accommodate the highest number of tenants or the most rooms for repurposing. Their size and high number of bedrooms make them well-suited to being sharehouses. Four-bedroom granny flats add the largest amount of property value due to adding the highest number of bedrooms to the property.

Designs

Three or four-bedroom granny flats typically have an open-plan kitchen and living room area with separate areas for the bathroom and laundry. Here at Granny Flats WA, we have an array of ready-made granny flat designs, or we can create a custom design just for you!

Three-bedroom granny flat designs

Three-bedroom granny flat designs typically allocate a more significant proportion of their space to bedrooms than the kitchen and living area. Outdoor areas are commonly incorporated into their designs.

Four-bedroom granny flat designs

Four-bedroom granny flat designs have less space dedicated to the open kitchen and living area. The higher number of bedrooms can leave each bedroom smaller than it would be for a two or three-bedroom granny flat with the same square footage. Four-bedroom granny flats often include an outdoor or alfresco area.