Infill development can be a smart way to unlock value from land—and in Brisbane, splitter blocks offer one of the clearest pathways to doing just that. If you’ve got your eye on a site (or already own one) with potential to be split and developed into two homes, there’s a lot to gain—but also quite a bit to think through carefully before you get started.
I’ve worked with both first-time investors and seasoned developers on these types of projects. When done well, splitter block developments can deliver solid returns and create quality housing in areas where people actually want to live. The key? Smart design that aligns with Council expectations, market demand, and construction feasibility.
What is a splitter block in Brisbane?
The term splitter block is commonly used in Brisbane to describe a single parcel of land that either already contains two lots on the same title (often due to historical subdivision), or has potential to be subdivided into two lots.
If the land is already recognised as two legal lots, you may be able to build two separate homes—each on its own lot—without going through the formal subdivision process. These are often the simplest and most attractive scenarios for developers.
But not all splitter blocks are formally recognised as two lots. Some may require a new subdivision application to be lodged and approved by Council. It’s not impossible—you just need to work with the right professionals.
Our advice? Speak with a knowledgeable town planner early. They’ll confirm the current lot status, identify any subdivision potential, and guide you through the process if needed. We often partner with Murray Bell Planning Co for this type of work, and we trust their team to give straight, practical advice—no overpromising, no chasing the impossible.
What to consider before designing
Every splitter block is a little different, and not all are created equal. Here’s what we look at first when assessing feasibility:
1. Site shape, slope and access
Is the block deep enough and wide enough to accommodate two functional dwellings? Will both homes have compliant street frontage or access? Narrow or steep sites can still work, but they need a tailored design approach.
2. Services and infrastructure
Sewer, stormwater, and other services will play a big role in determining build costs and feasibility. We always work closely with surveyors and engineers early on to avoid surprises later.
3. Zoning and overlays
Brisbane City Council zoning (usually Low Density Residential for splitter blocks) comes with rules around setbacks, site cover, building height, and design outcomes. Overlays—like character, flood or vegetation—can also influence what’s possible.
4. Existing structures
If the current home is pre-1946 and in a character area, demolition or relocation may be restricted. That doesn’t necessarily stop development, but it changes the strategy.
Designing for yield—and liveability
As an architect, my job is to balance three things:
Maximising ROI for you as the developer
Creating homes people actually want to live in
Designing within the bounds of what Council will support
On splitter block projects, that often means:
Making the most of narrow frontages with smart layouts
Designing to Code Assessable standards to streamline approvals
Ensuring privacy, natural light and ventilation even on tight sites
Considering flexible floorplans to appeal to different buyer/renter profiles
Collaborating early with a reliable town planner and certifier
These aren’t just boxes to tick—they’re essential to making the project financially and practically successful.
Council approvals and process insights
Some splitter block designs can proceed straight to building approval via a private certifier if they meet Code. Others may require development approval, especially if you’re proposing small lot sizes or building close to boundaries.
If you’re not sure where your site sits, this is where it pays to work with people who know the process well. I often collaborate with Murray Bell Planning Co, who bring a clear-eyed, solutions-first approach to dual occupancy and small lot developments. It helps keep the project moving forward—and protects you from unexpected delays.
A word on construction and cost efficiency
Designing two homes on one lot isn’t just a paper exercise. Construction costs, staging, access and services all play a role in the viability of the project. We always design with buildability in mind—working closely with your builder or construction estimator (or recommending trusted ones if needed).
The goal is to avoid beautiful-but-impractical plans and focus on smart, market-ready design that works for your site, your budget, and your timeline.
Final thoughts
Splitter block developments in Brisbane can be a fantastic opportunity—whether you’re looking to sell both dwellings, live in one and rent the other, or hold both as long-term investments.
But success starts with good advice and well-informed design. If you’re exploring a site and want to talk through what’s feasible, I’m always happy to take a look and share what’s worked on similar projects.