how can i estimate the cost of granny flat construction

How Can I Estimate the Cost of Granny Flat Construction?

Several factors should be considered when determining a budget for constructing a granny flat. These factors include the design, construction, cost of materials, and possibly even council fees. That's why it's crucial to hire a certified granny flat contractor who can lay out a detailed budget from the beginning, including allowances for any unforeseen expenses.

To make an informed decision on whether or not to build a granny flat in your backyard, it is important to have a firm grasp of the total cost involved. Learn all about granny flat costs to begin planning your ideal granny flat.

Table of Contents
    Add a header to begin generating the table of contents

    What Is A Granny Flat?

    A granny flat is a tiny, independent dwelling that can be an addition to or stand-alone from a bigger property. They are used to generate more revenue or provide additional space for a growing family. Granny flats have many potential uses, such as an extra living space, an office, or a rental unit.

    Why Do You Think That They Are Getting So Much More Popular?

    Granny flats are gaining in popularity since they are an inexpensive method to increase the square footage of a home. It is possible to construct a granny flat for far less than the cost of a standard house, and in many cases, you won't even need as many building licences. Renting out a granny apartment is a great way to bring in extra cash.

    How Much Does It Typically Cost In Australia To Construct A Granny Flat? 

    how can i estimate the cost of granny flat construction (3)

    Granny flat prices vary widely depending on factors such as square footage and amenities but typically go between $80,000 and $160,000. However, it is not uncommon for high-end custom builds to cost over $200,000.

    Each provider will quote a different amount, so compare the ' standard inclusions'. In addition, look for a 'turn-key pricing' that includes all the essentials for relocating into the granny flat. 

    The Price Of Constructing A Two-Story Granny Flat.

    Two-story granny flats can be constructed. When the granny flat's height exceeds 3.8 metres, the local municipality's rear and side setback requirements are modified. Consider creating a 2-story granny flat if your lot size is large enough to meet these building codes. An additional consideration for gaining council approval is that the maximum floor space of 60m for a granny flat must be distributed throughout the two levels of a 2-story granny flat. As long as the combined square footage doesn't exceed 60 square metres, you're free to divide the area however you like. Also, the stairs must be built in and counted as part of the living area.

    You should budget between $120,000 and $250,000 for something of this nature. If you get a bid for a granny flat far lower than this range, you should proceed with caution because important features may be left out. Granny flats of this size typically cost between $220,000 and $250,000 to build. This final range considers important factors, including the land's price, the design's cost, the cost of getting it approved by the city council, the cost of construction, and the cost of any necessary extras. Granny Flat Solutions's specialised team of bespoke designers knows how to make the most of every area. Our charges are all-inclusive, and we will work with you to discover the best solution for your 2-story granny flat.

    The Price Of A Small Granny Flat With One Bedroom.

    You may make the most of your land with a granny flat that only needs one bedroom. It's perfect for hosting out-of-town relatives, accommodating grown children who are still living at home, or using it as a rental unit for friends and acquaintances. Typical one-bedroom granny apartments can cost anywhere from $80,000 to $100,000 and have a floor space of 35 square metres to 45 square metres or even 60 square metres.

    Standard fixtures and expert construction by Granny Flat Solutions, a reputed and licenced granny flat builder, are included in this pricing.

    How Much Would It Set You Back To Construct A Granny Flat With Two Bedrooms?

    Granny flats with two bedrooms are ideal for elderly relatives such as grandparents or parents. In addition, they can serve as a pleasant alternative to a hotel room or your living room for guests staying with you during their visit.

    Granny flats with two bedrooms can range from $80,000 to $120,000, depending on the builder. Be thorough in your price comparisons. Some businesses that build granny flats factor in extras like utilities and plumbing into their prices, while others don't. Contact us to talk to an expert about your possibilities for constructing a two-bedroom granny flat on your property measuring 60 square metres.

    What are the expenses associated with building a granny flat?

    how can i estimate the cost of granny flat construction (2)

    Granny flat construction prices depend on several things, including size, which we've just discussed. Some examples are:

    • Regarding the layout and style, most businesses provide several common options to accommodate a variety of price points. Granny flats increase in price in proportion to the amount of personalisation done to them.
    • Local zoning ordinances restrict the positioning of the granny flat. Thus, the land must be prepared accordingly. Site preparation expenses, such as land levelling or removing trees, should always be factored into the budget. The kind of soil on your block can affect how much it will cost to lay a foundation.
    • The floors, walls, windows, and roof of a granny flat are typically preselected along with other interior and exterior components in the blueprint. You can find details about these in any brochure or advertisement for granny flats in the' Standard included' section.
    • Furniture and appliances—if you're furnishing your granny flat, you'll need to budget for furniture, bedding, cookware, and other necessities. It all comes down to personal preference and budget, though.
    • Utilities and other recurring expenses aren't factored into the purchase price of a granny flat, but they'll add up if you move in. Considering the upfront and ongoing costs of hooking up your granny flat to municipal utilities like water, electricity, and gas is important. Obtain an estimate from your utility suppliers before you move in so you know what to expect, as these costs will vary greatly based on your location and consumption. Remember that rates, in particular, are subject to frequent increases, so you should budget accordingly.
    • In addition to the construction price, you may also be required to pay various fees to the local government for things like a building permit, a sewage inspection, and a planning certificate.

    How to Reduce Expenses

    Even though constructing a granny flat can break the bank, there are ways to cut costs without sacrificing quality or design. These are some suggestions:

    • Pick a basic layout with few bells and whistles to reduce construction costs. 
    • It will be more economical to use some materials than others. Have your design contact enquire once more.
    • If you're ready to look around, you can furnish a home on a tight budget.

    If you follow these guidelines, you should be able to construct a granny flat that is both elegant and affordable.

    Other Aspects Relating to the Cost of a Granny Flat

    how can i estimate the cost of granny flat construction (4)

    Foundation Options: Bearers and Joists vs. Concrete Slabs

    Foundation Material—Concrete Slab Or Bearers And Joists—This is the first Budgetary Decision.

    Some contractors often include A concrete slab in the base price of construction for granny flats. Pump rental will also be required alongside the formwork, waffle pods, and steel reinforcement. A concrete slab is the most practical and inexpensive base for a granny flat, provided the land is level.

    Bearers and joist floor systems are needed for excavating and levelling sites or flood-prone areas. Anyone who wants to avoid the added expense of scaffolding when laying the groundwork for a granny flat on a sloped lot can take advantage of this service. Because they remove excavation and retaining walls, bearers and joists are cheaper than concrete slabs on steep slopes.

    The Secure And Economical Answer To Looking After Seniors

    We hope our loved ones can spend their golden years in a place where they are cared for, respected, and content. However, you won't have to pay exorbitant fees every month to help cover the overhead of their retirement community. There's no reason to force your parents to give up their independence and comfort by moving in with you. This will also mean less personal space for you.

    Let's take a moment to discuss money. It is common for nursing homes to require a Refundable Accommodation Deposit up in advance, which can range from $250,000 to $550,000 (or up to $50 per day). 

    If someone needs nursing home care for 20 years, they will have to shell out $365,000, money that could have been used towards constructing a granny apartment for future generations.

    A granny flat can be a great alternative to a costly retirement community while still providing your loved one with all the comforts of home. Your family members will be able to have the independence and solitude they desire, as well as the support of their extended family and the accessible accommodations they require if you construct a granny flat on your property.

    A Portfolio Investment With A Positive Rate Of Return

    If we haven't piqued your curiosity, perhaps the $14k in potential annual income from a granny flat will. The landlord also stands to gain significantly.

    In most cases, a granny flat is a more economical investment than a second, separate house. Because of this, you won't need a sizable loan to kickstart your investment portfolio, and you'll reap the benefits of a granny flat's substantial depreciation allowances immediately.

    Overall, a granny flat rental is a great way to make money from the extra room you're not using in your home. You should expect a respectable increase in your annual income of 10% to 20% on average.

    Here are some tips to help you make the most money possible from your granny flat:

    • Check the numbers to see if it's a good investment: Before making a final decision, consider whether or not a granny flat is allowed by your local council, how much it will cost to build, and how much demand there is for rental houses in your area.
    • Find reputable construction bids: With this information, you can better estimate the total cost of the construction project.
    • Building a granny apartment onto a rental house: If you plan to construct a granny flat on an investment property that already contains a primary residence, you should consider the impact this addition will have on the overall rental income and the costs associated with maintaining both homes.
    • Don't make excuses; Granny flats can increase a property's worth when they are well-designed and do not detract from the look of the main house.

    Conclusion 

    A granny flat is a small, independent dwelling that can be added to or stand-alone from a larger property, providing additional space for a growing family. They are becoming increasingly popular due to their affordability and ability to increase the square footage of a home. In Australia, the cost of constructing a granny flat typically ranges between $80,000 and $160,000, with high-end custom builds often costing over $200,000.

    Two-story granny flats can be constructed if the lot size is large enough to meet local municipality's requirements. The maximum floor space of 60m must be distributed throughout the two levels of a 2-story granny flat, and stairs must be built in and counted as part of the living area. Budgeting between $120,000 and $250,000 for such a structure is recommended, with a final range of $220,000 to $250,000 considering factors such as land price, design cost, approval by the city council, construction cost, and any necessary extras.

    A small granny flat with one bedroom can be constructed for hosting out-of-town relatives, accommodating grown children, or using it as a rental unit. Typical one-bedroom granny apartments can cost anywhere from $80,000 to $100,000 and have a floor space of 35 square meters to 45 square meters or even 60 square meters. Standard fixtures and expert construction by Granny Flat Solutions, a reputable and licensed granny flat builder, are included in this pricing.

    Granny flats with two bedrooms are ideal for elderly relatives and serve as an alternative to a hotel room or living room for guests staying with you during their visit. Prices for these units can range from $80,000 to $120,000, depending on the builder. Be thorough in your price comparisons, as some builders factor in extras like utilities and plumbing into their prices. Contact an expert to discuss your possibilities for constructing a two-bedroom granny flat on your property measuring 60 square meters.

    Granny flat construction costs vary depending on various factors, such as size, layout, style, local zoning ordinances, site preparation, and the type of soil on your block. The floors, walls, windows, and roof of a granny flat are typically preselected in the blueprint, and furniture and appliances are budgeted for based on personal preference and budget. Utility costs like water, electricity, and gas are not factored into the purchase price of a granny flat, but they will add up if you move in.

    To reduce expenses, consider choosing a basic layout with few bells and whistles, using more economical materials, having your design contact enquire again, and furnishing a home on a tight budget. By following these guidelines, you can construct an elegant and affordable granny flat that is both elegant and affordable.

    Foundation options for granny flats include concrete slabs, bearers and joists, and concrete slabs. Concrete slabs are the most practical and inexpensive base for a granny flat, provided the land is level. Bearers and joist floor systems are needed for excavating and levelling sites or flood-prone areas, as they remove excavation and retaining walls, making them cheaper than concrete slabs on steep slopes.

    A granny flat can be a secure and economical solution to looking after seniors, providing them with the independence and solitude they desire, as well as the support of their extended family and accessible accommodations. Additionally, a granny flat can be a portfolio investment with a positive rate of return, as it is a more economical investment than a second, separate house. In most cases, a granny flat is a more economical investment than a second, separate house, as landlords don't need a sizable loan to kickstart their investment portfolio and reap the benefits of a granny flat's substantial depreciation allowances immediately.

    To make the most money possible from a granny flat, check the numbers to see if it's a good investment: Before making a final decision, consider whether or not a granny flat is allowed by your local council, how much it will cost to build, and how much demand there is for rental houses in your area. Find reputable construction bids to better estimate the total cost of the construction project.

    Building a granny apartment onto a rental house: If you plan to construct a granny flat on an investment property that already contains a primary residence, consider the impact this addition will have on the overall rental income and the costs associated with maintaining both homes. Granny flats can increase a property's worth when they are well-designed and do not detract from the look of the main house.

    Content Summary: 

    • Several factors should be considered when determining a budget for constructing a granny flat.
    • These factors include the design, construction, cost of materials, and possibly even council fees.
    • That's why it's crucial to hire a certified granny flat contractor who can lay out a detailed budget from the beginning, including allowances for any unforeseen expenses.
    • To make an informed decision on whether or not to build a granny flat in your backyard, it is important to have a firm grasp of the total cost involved.
    • Learn all about granny flat costs to begin planning your ideal granny flat.
    • As long as the combined square footage doesn't exceed 60 square metres, you're free to divide the area however you like.
    • Also, the stairs must be built in and counted as part of the living area.
    • Granny flats of this size typically cost between $220,000 and $250,000 to build.
    • Solutions's specialised team of bespoke designers knows how to make the most of every area.
    • Our charges are all-inclusive, and we will work with you to discover the best solution for your 2-story granny flat.
    • You may make the most of your land with a granny flat that only needs one bedroom.
    • Typical one-bedroom granny apartments can cost anywhere from $80,000 to $100,000 and have a floor space of 35 square metres to 45 square metres or even 60 square metres.
    • Granny flats with two bedrooms are ideal for elderly relatives such as grandparents or parents.
    • Granny flats with two bedrooms can range from $80,000 to $120,000, depending on the builder.
    • Be thorough in your price comparisons.
    • Regarding the layout and style, most businesses provide several common options to accommodate a variety of price points.
    • Local zoning ordinances restrict the positioning of the granny flat.
    • Furniture and appliances—if you're furnishing your granny flat, you'll need to budget for furniture, bedding, cookware, and other necessities.
    • Utilities and other recurring expenses aren't factored into the purchase price of a granny flat, but they'll add up if you move in.
    • Considering the upfront and ongoing costs of hooking up your granny flat to municipal utilities like water, electricity, and gas is important.
    • In addition to the construction price, you may also be required to pay various fees to the local government for things like a building permit, a sewage inspection, and a planning certificate.
    • Even though constructing a granny flat can break the bank, there are ways to cut costs without sacrificing quality or design.
    • These are some suggestions: Pick a basic layout with few bells and whistles to reduce construction costs.
    • A concrete slab in the base price of construction for granny flats.
    • A concrete slab is the most practical and inexpensive base for a granny flat, provided the land is level.
    • Bearers and joist floor systems are needed for excavating and levelling sites or flood-prone areas.
    • Anyone who wants to avoid the added expense of scaffolding when laying the groundwork for a granny flat on a sloped lot can take advantage of this service.
    • Because they remove excavation and retaining walls, bearers and joists are cheaper than concrete slabs on steep slopes.
    • However, you won't have to pay exorbitant fees every month to help cover the overhead of their retirement community.
    • There's no reason to force your parents to give up their independence and comfort by moving in with you.
    • This will also mean less personal space for you.
    •  If someone needs nursing home care for 20 years, they will have to shell out $365,000, money that could have been used towards constructing a granny apartment for future generations.
    • A granny flat can be a great alternative to a costly retirement community while still providing your loved one with all the comforts of home.
    • Your family members will be able to have the independence and solitude they desire, as well as the support of their extended family and the accessible accommodations they require if you construct a granny flat on your property.
    • If we haven't piqued your curiosity, perhaps the $14k in potential annual income from a granny flat will.
    • The landlord also stands to gain significantly.
    • In most cases, a granny flat is a more economical investment than a second, separate house.
    • Because of this, you won't need a sizable loan to kickstart your investment portfolio, and you'll reap the benefits of a granny flat's substantial depreciation allowances immediately.
    • Overall, a granny flat rental is a great way to make money from the extra room you're not using in your home.
    • You should expect a respectable increase in your annual income of 10% to 20% on average.
    • Here are some tips to help you make the most money possible from your granny flat: Check the numbers to see if it's a good investment: Before making a final decision, consider whether or not a granny flat is allowed by your local council, how much it will cost to build, and how much demand there is for rental houses in your area.
    • Find reputable construction bids: With this information, you can better estimate the total cost of the construction project.
    • Building a granny apartment onto a rental house: If you plan to construct a granny flat on an investment property that already contains a primary residence, you should consider the impact this addition will have on the overall rental income and the costs associated with maintaining both homes.

    FAQs About Granny Flat

    Budgeting for professional design services is advisable, as a well-thought-out design can help optimise space, reduce construction waste, and potentially lower costs.

    While acting as the general contractor can save money, it requires significant time and expertise. If you need to become more experienced in construction, consider hiring a professional to avoid costly mistakes.

    You can adjust your estimates for inflation by using an inflation calculator or consulting with contractors who can provide current pricing information.

    Yes, permits and fees are essential expenses. Contact your local building department to determine the exact costs and requirements for obtaining permits.

    It's highly advisable to include a contingency budget of around 10-15% of your total estimate to account for unexpected expenses or changes in the construction process. This helps ensure you have the necessary funds to complete the project successfully.

    Scroll to Top