For property investors evaluating a multi-unit development, return on investment is shaped by far more than rental income alone. Location, design, construction costs, and ongoing expenses all affect whether a project performs well financially.
Western Australia’s housing demand has grown interest in multi-unit developments, especially developments that make the most of land while appealing to renters who want well-located, practical homes.
Understanding what drives rental demand and long-term returns helps you assess whether multi-units suit your investment goals. Smart planning at the development stage can lift both achievable rents and overall project viability.
Understanding Multi-Unit ROI
How it’s calculated
Return on investment (ROI) measures how effectively a property generates income relative to what it costs to build. For multi-unit projects, investors look at both the gross yield and net yield, based on total development cost rather than just land price.
Gross yield formula:
Gross Yield = Annual Rental Income ÷ Total Development Cost ×100
For example, if a completed development earns $240,000 per year and the total project cost is $4 million, the gross yield is 6%.
Gross yield doesn't account for ongoing expenses like management, maintenance, insurance and strata fees. Net yield subtracts these costs and gives a more accurate picture of actual returns.
What is a good ROI on multi-units?
Acceptable ROI benchmarks depend on market conditions, project scale, and your risk appetite.
In Australia, residential yields have historically sat between 3-6%, though multi-unit developments often achieve more because multiple tenancies share a single land parcel.
Capital growth also matters. A project with modest rental yield but strong price growth can outperform a higher-yielding asset in a slow-growth market.
Location and Its Impact On Rental Asking Prices
Suburb growth trends
Local growth trends have a direct effect on rental demand and property values.
Suburbs with population growth, new infrastructure and expanding employment tend to have stronger rental markets. Tracking building approvals, population forecasts, and planned transport upgrades can point to where demand is heading.
Choosing locations with strong growth indicators reduces vacancy risk and supports higher asking rents.
Proximity to amenities, transport and employment hubs
Renters prioritise convenience. Developments near public transport employment hubs, shops, and schools tend to attract stronger demand. Transit-oriented locations are especially popular with renters who want shorter commutes and easy access to daily services.
Walkability is increasingly important too. The easier it is to reach amenities on foot, the stronger the rental appeal. Tools like a walkability index can help measure this.
Local vacancy rates and rental competition
Low vacancy rates signal strong competition among tenants, which supports higher rents. Before committing to a site, check what supply is already under construction nearby. New projects completing soon can shift the balance and put pressure on rents )in both directions).
Property Configuration and Design
How unit mix affects overall yield (1-bed vs 2-bed vs 3-bed)
The mix of unit sizes affects overall yield. Smaller units typically generate higher yields relative to price, while larger units attract longer-term tenants and families. Balancing one-, two-, and three-bedroom units lets you target multiple renter segments.
Inner-city projects often lean toward one- and two-bedroom units for professionals and couples. Suburban projects tend to include more three-bedroom units suited to families. Multi-unit property ROI is tightly coupled with its design.
The role of car parking, storage & outdoor space
Practical features matter to tenants and directly affect achievable rents. Secure parking is important in areas with limited public transport. Storage and private outdoor space add liveability and make your units more versatile and more competitive.
Developments that prioritise these features tend to retain tenants longer and spend less time vacant.
Build quality, finishes & tenant appeal
Construction quality and interior finishes affect tenant satisfaction and ongoing maintenance costs. Durable materials, well-planned layouts and contemporary finishes help to attract tenants willing to pay higher rents while also reducing ongoing repair expenses.
Well-designed buildings hold stronger resale value compared with those built to minimum standards.
Development Costs and Returns
Land acquisition
Land is usually the largest single cost in a development budget. Site location, zoning, and permitted density all determine how efficiently you can spread costs across multiple dwellings. Higher density means more units to share the land cost, which improves feasibility.
Before buying, understand planning rules, infrastructure plans, environmental constraints and any rezoning potential. This protects both your near-term development goals and long-term asset value.
Construction costs
Construction is the next major cost after land. It depends on design complexity, material choices, and labour availability. Material price swings and labour shortages have affected Australian construction markets in recent years and can materially impact budgets.
Always get detailed quantity surveying, use experienced builders and build in a contingency. Decisions about finishes, layouts and energy efficiency affect both upfront costs and long-term rental performance.
Holding costs & financing
Holding costs build up throughout the planning and construction phases. These include loan interest, council rates, land tax, insurance and strata levies. Delays in approvals or construction push these costs higher, eating into net ROI.
Financing structure matters too. Choosing the right loan facilities, managing drawdowns and controlling interest exposure keeps cash flow stable. Pre-leasing, marketing and property management setup also fall into this phase and help reduce vacancy once the project is complete.
Modelling Realistic Returns
Gross vs net yield
Gross yield is a useful starting point but doesn't tell the full story. Net yield is the more reliable measure. It accounts for the main ongoing costs, including:
- Property management fees
- Maintenance and repairs
- Insurance
- Strata or body corporate expenses
- Council rates and land tax
Accurate cost forecasting lets you project realistic cash flow after all expenses. It can also highlight ways to improve efficiency, like choosing low-maintenance finishes, improving energy performance or streamlining management.
Ongoing costs to be aware of
Beyond regular operating expenses, investors must also consider the long-term expenses of property investment. This includes cyclical maintenance, major asset replacements, building compliance upgrades and refurbishment of tenant-facing elements to maintain market competitiveness.
Well-planned developments can reduce these outlays through strategic design, durable materials and layouts that minimise operational complexity. For example, careful selection of finishes, provision of accessible maintenance spaces and investment in mechanical and electrical systems can extend the asset’s functional lifespan and safeguard yield.
Factoring in both short-term income and long-term expenses ensures that investors can make informed decisions about whether units are a good investment for their portfolio objectives. Accurate modelling of both gross and net yields allows developers and investors to forecast ROI reliably and plan for sustained financial performance.
Long-term costs go beyond regular operating expenses. Plan for cyclical maintenance, major asset replacements, compliance upgrades and periodic refurbishment to keep units competitive.
Good design choices at the start can reduce these costs significantly. For example, careful selection of finishes, provision of accessible maintenance spaces and investment in mechanical and electrical systems can extend the asset’s functional lifespan and safeguard yield.
Accounting for short-term income and long-term expenses lets you make informed decisions about your portfolio objectives. Modelling both gross and net yield gives you a reliable picture of expected ROI and helps you plan for sustained performance.
Talk To The Novus Projects Team About Your Next Multi-Unit Investment
Successful multi-unit development combines strategic planning, tight cost management and a solid understanding of the local market. The right team helps you identify opportunities, model realistic outcomes and make sure both design and operational decisions support strong returns.
At Novus Projects, we work closely with investors to assess site potential, optimise development design and project returns across different scenarios. Our expertise covers multi-unit investment structures, unit mix optimisation, and local tenant demand, helping investors make data-driven decisions before construction begins.
By engaging early, you gain a clear picture of expected cash flow, operating costs and capital growth potential. This lets you build a strategy tailored to maximise both rental yield and long-term performance.
Whether you're exploring a new development or evaluating an existing opportunity, Novus Projects gives you the guidance and market intelligence to invest with confidence. Get in touch.