There are some reasons to build a granny flat, including tax benefits. However, the main reasons why many people don’t build them are because they don’t know the rules of building one. ADUs, or accessory dwelling units, are generally not considered tiny houses and may be subject to municipal regulations.

Building a granny flat

Adelaide Granny FlatsMany homeowners mistakenly assume that hiring a low-cost general contractor will save them money, only to be over budget or overwhelmed. Instead of hiring a company that promises to do a good job at a lower cost, you need to find one that understands the intricacies of building a granny flat. The following are some questions to ask a prospective granny flat builder. Remember that these questions may seem simple, but they’re important and help you avoid costly mistakes.

Consider the impact of your Adelaide Granny Flats on the rest of the property. Of course, it impacts the way you live and work, but it also positively impacts the property’s value. For example, you should avoid building a granny flat that takes up a significant portion of it when you have a large yard. In addition, a sturdy, high-quality ADU will always raise your property value.


Whether you are planning to build a separate dwelling for your granny, or you’re just keen to make your old one more spacious, the cost of granny flats can be a deciding factor. However, various types of granny flats suit all budgets and styles. They can be built as a CDC (Complying Development Application), which requires the services of a Registered Private Building Certifier. Alternatively, you can use a Development Application (DA) to submit to the local council. Whatever option you choose, Cubitt’s are here to help.

Often, the cost of Adelaide Granny Flats can vary based on the quality of the materials you choose. Although you might have to spend more money on better quality materials, you don’t need to go overboard. Instead, look for used materials stores if you can. You can get the same materials for less. Just make sure to consult the region’s relevant building codes and regulations. Building a granny flat can be complicated, so you’ll need to know your budget beforehand.

Permitting requirements

While granny flats are permitted in most cities, some are more restrictive than others. In Chula Vista, for example, there are no restrictions on the size of the dwelling unit as long as it is attached to the primary house or detached from it. A detached unit is allowed but cannot be larger than 850 square feet. A secondary unit must be attached to the main house or have a parking garage. The additional fees can be as low as $215 or more, depending on the jurisdiction.


Aside from the space issues mentioned above, the smallness of granny flats can be a good thing. This type of property is a perfect choice for those with a large property as it has space for a separate living and sleeping area. The small space can be converted into a cozy primary suite or a guest room. They are generally around 750 square feet in size. Modern tiny homes have proven that even small spaces can be beautiful.

When building a granny flat, keep in mind that it’s important to check local regulations. The regulations for San Jose might be different from those in your area, so it’s best to contact your local building department or ADU specialists. Make sure to ask for an all-inclusive quote before starting construction. By doing this, you’ll avoid any surprises later. Once you have your quotation in hand, you’ll better understand what’s required.

Cost to build

Depending on the size of the space, the cost to build granny flats varies, but generally, they range from $500 to $1,000 per square foot. These are typically smaller than traditional homes but still offer valuable space for families to share. However, smaller spaces may not be ideal for aging in place or handicap accessibility, so you’ll need to create creative storage solutions to keep the costs low. Here are a few tips to keep in mind: