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A well-built duplex in a carefully-chosen location has the potential to generate high rental yield and capital growth, so it's not hard to see why it has become such as popular investment option for first-time buyers and investors alike. But it's not quite a penalty kick either- there are certain things you need to factor in to ensure the success of your project.

This article will walk you through the benefits, the costs, and what you need to look out for to make sure it's only your bank balance that's shooting up, not your blood pressure!

What is a duplex

A duplex (also known as a 'dual occupancy') is a residential building with two units under one roof- with one dividing wall splitting it into two separate homes—each home with its own yard, entrance and amenities.

So with one block of land, you can build two homes. It will cost more than building a single freestanding home but much less than building two, and that's where the obvious benefit comes in for investors.

What are the benefits of building a duplex?

Instant equity

Simply the process of building two homes on a block of land can significantly increase its value- something called 'instant equity'. It's not unheard of to see gains of $300,000 in the first year, in larger projects.

Help with cash flow

The rental yield from the second property can go a long way to paying off any mortgage you took out to fund the project, or if it was an investment property, there’s every chance the yield from both properties will more than cover the repayments you need to make.

High growth potential

If you are astute with your choice of location and builder, there is scope for real capital growth potential. And not just on one property, but two.

You can even create equity to put the deposit on another property and get the ball rolling on building your portfolio and property empire!

Great for first-time buyers

Duplexes are a no-brainer for buyers looking to get on the ladder, costing more than a single freestanding house, but that extra is instantly offset by the rental potential and instant equity released by the second property.

Lower maintenance costs

The smaller size of duplexes is reflected in lower maintenance costs. Many have smaller yards and more modest exteriors, which also cuts down on landscaping costs.

What are the average costs of a duplex in Melbourne? And what are the average costs of a duplex in Australia?

A variety of factors impact the final cost of building a duplex (and more on those shortly), but here are the rough averages:

Costs in Australia

Melbourne: $650,000- $1 million

(2 units in 300sqm, standard finish and modern build is $600,210.00- $663.390 with Riser’ s cost estimator)

Sydney: $600,000- $1.2 million

Canberra: $500,000- $1.1 million

Again though, we must stress these are only averages. The factors below will determine where your project sits on this scale.

Duplexes usually take longer than your average freehold- not surprisingly- anywhere from 3 to 6 months longer, depending on the size and complexity.

What factors affect the price of the duplex build? 

1. "Location, location, location."

You will have heard that old cliché, and it's absolutely true: the location of your site build is the main factor that will drive the final price. How popular the area is with renters and buyers. It also determines how likely you'll be to get approval for all the necessary permits from the local councils.

When choosing the location, you need to get into the investment mindset and consider:

• how close it is to the city or any commercial hubs
• how convenient it is for public transport, schools and shops
• other amenities in the area
• local rental demand and supply

2. Site size

The size of the plot of land and, again, the demand in that area, will affect the land costs and thus the value of the investment and its earning potential.

3. Materials used

The quality of the build- from the frame to the countertops- plays a significant role in the final purchase price.  

4. The architects and contractors

The design and build obviously account for the lion's share of the costs. The most skilled and experienced often come with a premium cost attached.

The architect will look after everything from drafting the floor plans, to helping establish the preliminary budget and obtaining necessary permits.

The contractors usually hire and co-ordinate all the sub-contracting teams necessary, ensuring all materials are available and advising along the way.

5. Additional costs

Unexpected additional costs (often termed ‘latent conditions’),can include anything from rock removal to service connections.

Things to be wary of

• A dual occupancy project will usually require a substantial dual-frontage block and then appropriate zoning to subdivide into two separate lots. The best sites come with the highest price tags, as you can be sure other buyers will be thinking along the same lines. Sometimes it can even get to a point where the numbers don't stack up, and you pick your battle elsewhere.
• These subdivisions can cost a surprising amount in consultation fees to town planners too- often $40,000 to $50,000.
• You can bypass this hassle by going for pre-approved blocks, but this is normally factored into their (higher) price.
• Between the design, its approval and the construction, it can take over a year, accruing holding costs along the way such as loan repayments, land tax and council rates.
• If you need to knock down an existing property and then rebuild, demolition costs can be up to $20,000.
• Ensure your contract includes a maximum construction completion date and a warranty check-up after six months to fix any minor issues.
•  And if you plan on selling within five years of building, you need to factor in GST (Goods and Service Tax) and Capital Gains Tax if it isn't your principal place of residence.

Tips to save money with your duplex development

First off, to avoid a lot of hassle and wasted time, money and energy, keep on the right side of the local council straight away. Find out the local rules and regulations, which development application(s) you'll need down the road, and the likelihood of permit approval.

Smaller duplexes = cheaper duplexes (all things being equal), so this is a way to cut your cloth according to your budget. Building during the offseason can save those precious pennies too.

Vanity may have you seduced by the highest end finishes, but sometimes they don't add the value to justify the expenditure. It would be best to find a trade-off between what you can afford, what will be attractive to renters and what adds value.

Lastly, look into flat blocks as another way to save on your construction costs.

As you can see, the duplex may be a no-brainer as an investment, but it is certainly nothing to jump into without experienced professionals in your corner. Luckily, we know just the guys.

The cost to build townhouses and multi-unit buildings in Melbourne depends on numerous factors. These include the construction costs, home builders costs, the cost of land, and site costs. There are also lesser factors that affect prices, such as foundation type, insulation quality, and the size dimensions of your building. Overall, there is a wide range of costs; some homeowners might pay $300 per square foot. However, this price is only a starting point.

If you're looking to invest in a dual occupancy project and build multi-unit buildings in Melbourne, you can expect to pay anywhere between $350 and $850 per square foot.

In this article, we explore all the different factors that affect the final price for building two townhouses or multi-unit buildings in Melbourne. Also, we'll touch on the exact numbers and help you determine how much does it cost to invest in dual occupancy development in Melbourne.

What is a Townhouse?

A townhouse is a multi-story residence that is connected to one or more other units. You'll commonly see them along the roadways in dense suburban and metropolitan locations. Townhouses resemble regular detached homes but operate more like condominiums, or condos, in that they are all governed by the same entity.

What is a Multi-Unit Building?

Multi-unit buildings are buildings with more than one residential unit. Within the same building, many units can be stacked one on top of the other or side by side.

What is a Dual Occupancy Building?

Dual occupancy is a building with two flats or houses on one title. There are a variety of arrangements that can be used for dual occupancy buildings. This could be two side-by-side houses with street frontage that are connected. It could also be one house behind the other that includes driveway access on one side to access the property.

If you're interested in finding out the costs of building townhouses in Melbourne, it is essential to understand all the factors affecting development costs. The prices of building townhouses or multi-unit buildings depend on numerous considerations, and we will explore them in more detail later on.

First, let's find out why people choose to invest in dual occupancy buildings or multiple buildings at all.

Why Invest in Dual Occupancy Buildings in Melbourne?

There are numerous reasons for building multi-unit dwellings in Melbourne. Primarily, these projects remain cost-effective over time.

Also, there is a growing demand for dual occupancy dwellings. People want to live closer together and use their money on education, travel, and other expenses. This has created high demand for the small units since they cost less to run.

Dual occupancy buildings are also cost-effective.

To build two townhouses in Melbourne, you'll need to purchase land, and the cost of construction is divided into two or more units. At first glance, this may seem too costly for some investors, but it pays off significantly over time with the right strategy.

The cost to build two townhouses in Melbourne is typically less than half the cost of a stand-alone house.

In addition, you can rent out one unit and live in the other. This way, your living expenses are covered with only one unit, and when you pay off the building costs, you can even build wealth by renting.

Now, let's explore all the factors that affect the build cost and how much does it cost exactly to invest in multiple property development in Melbourne.

What is the Cost to Build 2 Townhouses, Melbourne, Australia?

In this section, we will look at all the factors that affect the cost to build two houses in Melbourne and provide you with a cost estimate for building dual occupancy housing.

The Cost of Construction

Typically, construction costs make up a significant cost for two townhouses in Melbourne. The cost to build a dual occupancy housing unit accounts for about the majority of the total cost.

In general, for a single-story building that uses basic materials for construction, the average price is $1000 per square meter. An upmarket luxury build could cost you up o $3000 per square meter for a double storey dwelling.

In a typical suburban area, a dual occupation building or two townhouse developments cost about $1350 per square meter, or $1700 with site costs.​ An average 3 bedroom townhouse will cost $250,000 upwards per unit.

The cost to build two townhouses in Melbourne varies and depends on multiple factors such as:

• type and quality of materials used;  
• required design elements;
• the cost of labor in the area;
• development sites cost;
• the cost of land;
• other costs.

Type and Quality of Materials Used

Your building costs will increase if you decide to go for better-quality materials. For example, building two townhouses in Melbourne with essential build materials like brick and wood may cost you around $150 - $300 per square metre, whereas using costlier material could cost almost double. It is best to look for builders cost crunches online to see the cost breakdowns of different materials used for building townhouses.

Required Design Elements

Townhouse layouts are costlier to design if you want them to stand out. For instance, you may opt for more complex architecture with more expensive materials and design elements like high-end kitchens and bathrooms, fancy tiles, and other cost-intensive features.

The Cost of Labor

If you decide to hire a contractor for your project, it will add costs to your final price as the cost of labor can be pretty pricey. Normally, the cost to build a townhouse in Melbourne for a 100 square meter project could cost you about $25,000 -$50,000.

Development Site Cost

The cost of buying a development site for building two townhouses in Melbourne will affect building them. It is recommended to hire town planners prior to the purchase as they can advise buyers which developments are allowed.

You can save on costs by buying an existing house for redevelopment. For example, the price to purchase and redevelop an existing house in Melbourne is estimated at around $100 per square meter whereas the cost to build new townhouses is estimated at around $150 per square meter.

The Cost of Land

The cost of land is another major cost when building two dwellings. So how much does it cost to acquire land in Melbourne? The price of land fluctuates depending on many factors, mainly location and availability. The price ranges between $150,000 and $875,000.

Keep in mind you will be charged an extra cost if you plan to build a new house or multiple buildings in a more popular area with high demand for housing projects. However, if you go for less popular areas (for example flood-prone areas), you will pay less for the land

As with any construction project in Australia, you'll need to check local planning laws when buying land for two units and ensure appropriate planning permits.

Other Costs

In addition to construction costs and the cost of the land, you need to take into account several other factors that will affect the final price, such as:

• Land tax
• Town planning permit
• Goods and service tax
• Legal cost
• Site management

The Hidden Cost of Building a Duplex or Multiple Townhouses

When building a duplex, multiple townhouses, and multi-unit buildings, there are some hidden costs people tend to forget about, such as

• The cost of demolishing an existing house before building a new one.
• The cost of making infrastructure improvements. This may include upgrading public services like power, water supply, etc.
• The cost of property advertisements for selling or leasing out your properties.

Another important cost that is peculiar for this type of property only is the subdivision of a property.

Property Subdivision Cost

Subdivision of a property isn't straightforward and includes multiple costs such as consulting fees and town planners.

In order to subdivide a property, you need to pay an application fee and have it approved. After that, you will have to hire a surveyor who will cost you about $2,000 -$3,500. Then comes the cost of land division itself at approximately $5 per square meter followed by a cost of land survey (if the surveyor didn't do it).

How to Reduce Costs When Building Townhouses, Melbourne?

When it comes to the build price of two or more townhouses or multi-unit buildings, you should keep in mind that there are several ways you can reduce your construction cost.

First, you can choose to build townhouses instead of units. Townhouses are larger than units and cost less per square metre because the cost is divided between two properties.

You can also opt for modular construction instead of the traditional brick-by-brick building, which reduces cost. Modular home builders in Melbourne use prefabricated construction to keep costs low.

You can also save on the cost by building dual occupancy homes instead of two separate properties. Of course, this will depend on your requirements and living arrangements.

Finally, you can choose to build smaller dwellings that cost less than large properties.

Materials, Furnishings, and Appliances

You can also save a significant amount of money if you purchase all materials yourself. Materials manufacturers offer volume discounts when you buy in bulk, significantly reducing the final purchase price.

The cost of furnishing and appliances vary greatly depending on whether you purchase them one by one or in bulk. For example, suppose you need to buy kitchen cabinets and appliances for two townhouses. In that case, cost savings are maximized if you purchase these items simultaneously, which directly impacts the final purchase price.

How to Make Sure Your Townhouse or Duplex Development Project Pays Off?

If you're wondering whether your investment will pay off, contact a respected company in the construction industry. From cost estimation to cost control and even a feasibility report, they will take care of every aspect of the construction process from start to finish.

In addition, cost consultants can give you valuable advice on reducing costs when building multiple units and townhouses and ensure cost savings, which can be used to attract potential buyers.

If you want to sell your development as soon as possible and avoid huge losses, cost consultants will help you achieve the best price for your property by offering cost-effective building solutions.

With their assistance, you should easily overcome any difficulties during cost estimation and cost control.

How Can Riser Bespoke Builders Help You?

Father-and-son team Jeff and Logan Wang are at the heart of Riser Bespoke Builders. Founded in November 2014, Riser Bespoke Builders now builds 55+ homes a year. The company has 11 full-time employees, 35+ proven and trusted subcontractor teams, a new showroom in Nunawading, and a display home in Mont Albert North under construction.

Riser Bespoke Builders offer free consultation calls and help you get a cost estimate in less than a minute! Also, check out their cost calculator to help you estimate the precise cost of the property you are planning to build.

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If I had a dollar for every time, I'd been asked that over the last year, I'd be putting away my trowel and picking up the fishing rod!

And I'd love to give you a positive answer, the light at the end of this tunnel, but it does neither of us any good if I'm not giving it to you straight- things are going to get worse before they get better.

Steady rises since 2020

There has been a steep increase in demand for building materials for a few years now.

The Government's Homebuilder Grant was designed to stimulate the construction industry, and it did just that. Interest in new builds and vacant land shot up, and although its effects have now faded, hot on its heels came the spike in demand that followed the easing of Covid lockdown restrictions.

The rise in demand pushed up prices, and in 2021 we felt it most: timber rising by 50-100%, steel by 30-60% and concrete by 20-40%.

So prices have risen, and the industry has struggled to meet the demand.

Then came the recent floods in Queensland and NSW, and the war in Ukraine.

Impact of floods and Ukraine invasion

The devastation from the floods destroyed 5000 homes and left thousands more needing urgent repairs. Subcontractors- from plumbers to electricians to tilers and roofers- have been called in from all over the country to help the effort.

With Russia being one of the country's largest suppliers of timber, the conflict with neighbouring Ukraine has seen huge knock-on effects on the global supply chain and shipping.

The result? A perfect storm of even more demand on an industry creaking under the weight of increased demand and less supply to service it.

Schedules and budgeting

With the sector blindsided by the labour and material shortages, schedules have been packed, yet ever subject to change, with the erratic supply of materials only making a bad situation worse.

It feels like every day for as long as we can remember, we've been the bearer of bad news to our customers, either with delays or escalating costs.

And it's likely to continue into the second half of 2022...

"After the current surge, we don't expect costs to just drop back to where they were previously," Macromonitor director Nigel Hatcher said.

"Rather, costs will continue rising from the new, higher base, albeit at more normal rates of increase."

"We expect growth in costs of 2.4 per cent in the year to June 2023 and growth of just 1.3 per cent in the year to June 2024. Beyond that, we expect average annual cost inflation of 2.1 per cent per year through to 2031 (Australia: Financial Review)

The 'new normal', but (thankfully) the rises will slow

So, unfortunately, these price rises are likely here to stay.

That's not the conclusion you wanted to hear, and it's not the one I wanted to give you.

The one saving grace is that we are over the worst of them- there will be slight rises as the year meets its close, and then they will fall back in line with inflation.

Here's hoping for no more big surprises in the meantime...

The investment you make building a property is often the very biggest you'll make in your life, so you owe it to your bank balance (and your blood pressure!) to do your due diligence before you choose the person for your job.

These are our 7 essential tips to ensure your choice is a wise one...

1. Look for references

This is fairly common sense but not to be underestimated- check what previous customers are saying! That's much easier with online reviews etc but even canvas your friends and see if anyone has had experience using them before.

Previous conduct and quality of work is the best guarantee you can get for how you can expect your project to turn out.

Architects that have worked with them before and tradesmen on-site at current jobs can also help you gauge their efficiency and reliability.

2. Check their experience

This isn't a footlong at Subway; if your builder is new on the job, there are serious implications for the timescale and cost of your project. Experience gained in the trenches trumps Theory every day of the week. There will not be too many bumps in the road an experience builder hasn't dealt with before, and the speed and cost at which your project is built will reap the rewards.

3. Look at their previous projects

A decent portfolio of previous projects- especially the type of project you are undertaking- is a huge indicator of their relevant experience and skills. 'The proof is in the pudding'.

Check their website or ask them for examples if they don't have an online presence (though in this day and age, that too would be a bit of a red flag!).

4. Check their insurance and warranties

In Australia, a reputable professional will have a broad base of construction knowledge, be able to produce estimates, read plans and help obtain any necessary permits. They also need to know and adhere to state regulations and have a license to work in that state.

Check your builder is covered and the level of the coverage for peace of mind before and during the build.

Ask if they have a structural warranty for their work, and again, check what it entails. This will protect you in the construction and against incomplete or defective work. A worst-case scenario, but one you want properly shielded from!

5. Ask for a detailed quote

If your builder can't give you a solid, detailed quote, then again that's a red flag to look out for. It not only prepares you to budget (or even compare against their competitors) but it will be a good indicator right off the bat of the attention to detail you can expect them to bring to your job.

Put in a detailed document of what exactly you need to clear any ambiguity and to allow them to make the most accurate costing they can for you. It will also allow you to make the fairest and easiest like-for-like price comparisons.

6. Assess their lines of communication

Good communication from the offset can help you feel confident that you will be kept properly in the loop as the project progresses. Of course, they may be busy at times, and you don't expect them to be at your beck and call. However, you can usually tell within the first few contacts what kind of customer experience you can expect.

7. Don't be afraid to ask questions!

Find out as much as you can before you commit yourself. About their experience, their previous projects, their processes. There are no stupid questions when you are making an investment of this size, and a good builder knows this and should have no problems answering your questions and (where necessary) allaying any fears.

However, you don't just want one that tells you everything you need to hear to secure your business. You want their experience, honesty and integrity to shine through. The final reassurance that the choice you are making is the correct one.

Choosing the correct builder for your project can seem like a daunting prospect but it is arguably THE crucial factor in the success of your project. We hope these tips have made that choice a little easier for you!