If there's one thing that gets a property developer salivating it's a townhouse development site located on a corner. Two frontages open up lots of extra possibilities!
And although I've specifically focused on roundabouts in this article, many of the same criteria apply for any corner block, even if it's not on a main road, as well as other types of main road intersections.
Let’s unpack the key issues developers face when trying to create townhouse projects near roundabouts on main roads.
Vehicle Access and Crossovers
The most immediate issue with a roundabout is access. Local councils and road authorities are notoriously cautious about driveways located close to an intersection. Roundabouts are designed to keep traffic flowing continuously, which makes any point of entry or exit within their approach or departure zones a potential safety hazard.
Authorities will rarely permit new crossovers within 30–50 metres of a roundabout’s entry or exit points. In some cases, they’ll prohibit access altogether from the main road frontage, forcing all driveways to a side street or rear laneway if one exists.
This can push garages and driveways to inconvenient positions or force internal redesigns that compromise the efficiency of the layout. You may even need to reduce the number of dwellings to maintain compliance. That's going to hurt your bottom line in a big way.
Line-of-Sight Issues
The main reason why crossovers are such an issue is line-of-sight issues. This means how far a driver can see up the road when pulling out of the property. The longer the distance, the better their ability to see an approaching car, pedestrian or cyclist and avoid a collision. Definitely the preferred outcome!
If the crossover exits onto the approach to the intersection, then the distance a driver can see up the road is usually longer. If it's just around the corner, then the driver has little visibility of a car approaching the intersection and about to turn the corner.
Which might make you think the easy solution would be to have the access on the approach side of the site. Except if that's the main road, you then set up a clash with the first point I raised!
Another issue with access on the approach side is traffic banking up at the roundabout, which is hardly ideal for reversing out of your property. As a result, you may need to provide enough space on site for a vehicle to turn around in order to exit the property in a forward direction.
At the very least, you'll likely trigger a mandatory Traffic Impact Assessment or Road Safety Audit, adding cost, time, and complexity. And if these reports conclude that sight distances are insufficient for safe driveway operation, say goodbye to your development plans.
Council Constraints
As roundabouts are considered high-activity road environments, councils often impose increased front setbacks to improve sight distances and protect the public streetscape. That additional metre or two of setback might sound minor, but on small infill sites, it can reduce the developable footprint significantly.
Developers may need to dedicate portions of their land for road reserves, landscape buffers, or acoustic walls. In addition, designers often struggle to design attractive façades that double as noise barriers, leading to compromised streetscapes and higher architectural costs.
Parking may also become an issue, particularly for visitors. Street parking restrictions usually apply close to a roundabout, making it harder for tradies, delivery vehicles, or guests to access the dwellings.
And that's only once the townhouses are built. Building next to a roundabout on a main road is also logistically challenging. Trucks can’t easily stop or turn into the site, and councils may restrict road closures or heavy vehicle movement during peak hours.
Council restrictions can also complicate scaffolding, fencing, and crane positioning. These logistical headaches translate into higher build costs and eroding profitability. And always remember the bins! Council aren't going to want rubbish trucks stopping right before a roundabout to empty bins.
Construction Logistics and Traffic Management
As a result of the logistical issues, you’ll need a comprehensive Construction Traffic Management Plan (CTMP) approved before works start. This will outline requirements for:
All of this adds time, cost, and risk to the construction phase. Builders also tend to increase their margins on these sites to cover the uncertainty, further eroding developer profit.
Planning Delays and Authority Referrals
And just when you thought Council requirements were enough of a headache...
Developing on a main road roundabout almost always triggers referral to state road authorities. Each referral adds layers of bureaucracy, with timeframes often stretching out to three to six months for feedback. Common authority conditions include:
Each new condition adds cost and extends the approval process. Even if the development is eventually approved, the imposed requirements can change the financial viability of the entire project.
Market Perception
Main roads carry constant traffic - cars, trucks, buses, motorcycles - all accelerating, braking, and changing gears as they navigate the roundabout. The acoustic environment is relentless.
Families with children, downsizers, and owner-occupiers often reject sites they perceive as unsafe or noisy. This limits your buyer pool and can push your target demographic toward investors, who in turn expect higher yields or lower entry prices.
Even with extra measures to reduce interior noise, private open space areas (like front courtyards or balconies) may remain noisy and uncomfortable. For buyers, that’s a red flag.
Valuers also tend to apply small but noticeable discounts for properties affected by high-traffic environments. Over multiple dwellings, this can erode profit margins significantly, or make it harder to obtain construction finance.
The Bottom Line
On paper, a townhouse site near a main-road roundabout might tick a few boxes: good exposure, easy access to arterial routes, and perceived convenience. But under the surface, it’s one of the most complex development scenarios a small-to-medium property developer can take on.
That doesn’t mean these sites are impossible, but they demand early feasibility work and specialist advice from traffic engineers, acoustic consultants, and experienced planners before any contract is signed.
In some cases, converting the concept from townhouses to commercial or mixed-use may deliver a better planning outcome. In others, walking away is the smarter play.
Ultimately, when it comes to townhouses, liveability sells. And no matter how clever the design, a roundabout on a main road rarely delivers the calm, connected lifestyle that buyers are looking for.
And although I've specifically focused on roundabouts in this article, many of the same criteria apply for any corner block, even if it's not on a main road, as well as other types of main road intersections.
Let’s unpack the key issues developers face when trying to create townhouse projects near roundabouts on main roads.
Vehicle Access and Crossovers
The most immediate issue with a roundabout is access. Local councils and road authorities are notoriously cautious about driveways located close to an intersection. Roundabouts are designed to keep traffic flowing continuously, which makes any point of entry or exit within their approach or departure zones a potential safety hazard.
Authorities will rarely permit new crossovers within 30–50 metres of a roundabout’s entry or exit points. In some cases, they’ll prohibit access altogether from the main road frontage, forcing all driveways to a side street or rear laneway if one exists.
This can push garages and driveways to inconvenient positions or force internal redesigns that compromise the efficiency of the layout. You may even need to reduce the number of dwellings to maintain compliance. That's going to hurt your bottom line in a big way.
Line-of-Sight IssuesThe main reason why crossovers are such an issue is line-of-sight issues. This means how far a driver can see up the road when pulling out of the property. The longer the distance, the better their ability to see an approaching car, pedestrian or cyclist and avoid a collision. Definitely the preferred outcome!
If the crossover exits onto the approach to the intersection, then the distance a driver can see up the road is usually longer. If it's just around the corner, then the driver has little visibility of a car approaching the intersection and about to turn the corner.
Which might make you think the easy solution would be to have the access on the approach side of the site. Except if that's the main road, you then set up a clash with the first point I raised!
Another issue with access on the approach side is traffic banking up at the roundabout, which is hardly ideal for reversing out of your property. As a result, you may need to provide enough space on site for a vehicle to turn around in order to exit the property in a forward direction.
At the very least, you'll likely trigger a mandatory Traffic Impact Assessment or Road Safety Audit, adding cost, time, and complexity. And if these reports conclude that sight distances are insufficient for safe driveway operation, say goodbye to your development plans.
Council Constraints
As roundabouts are considered high-activity road environments, councils often impose increased front setbacks to improve sight distances and protect the public streetscape. That additional metre or two of setback might sound minor, but on small infill sites, it can reduce the developable footprint significantly.
Developers may need to dedicate portions of their land for road reserves, landscape buffers, or acoustic walls. In addition, designers often struggle to design attractive façades that double as noise barriers, leading to compromised streetscapes and higher architectural costs.
Parking may also become an issue, particularly for visitors. Street parking restrictions usually apply close to a roundabout, making it harder for tradies, delivery vehicles, or guests to access the dwellings.
And that's only once the townhouses are built. Building next to a roundabout on a main road is also logistically challenging. Trucks can’t easily stop or turn into the site, and councils may restrict road closures or heavy vehicle movement during peak hours.Council restrictions can also complicate scaffolding, fencing, and crane positioning. These logistical headaches translate into higher build costs and eroding profitability. And always remember the bins! Council aren't going to want rubbish trucks stopping right before a roundabout to empty bins.
Construction Logistics and Traffic Management
As a result of the logistical issues, you’ll need a comprehensive Construction Traffic Management Plan (CTMP) approved before works start. This will outline requirements for:
- On-site material storage
- Vehicle parking during the construction
- Traffic controllers for deliveries
- Staged works to maintain pedestrian and vehicle flow.
All of this adds time, cost, and risk to the construction phase. Builders also tend to increase their margins on these sites to cover the uncertainty, further eroding developer profit.
Planning Delays and Authority Referrals
And just when you thought Council requirements were enough of a headache...
Developing on a main road roundabout almost always triggers referral to state road authorities. Each referral adds layers of bureaucracy, with timeframes often stretching out to three to six months for feedback. Common authority conditions include:
- Relocating or redesigning access points
- Upgrading kerbs, footpaths, or signage
- Constructing additional turning or deceleration lanes
- Construction of splitter islands, signs, or pedestrian crossings
- Providing a financial contribution toward road works
Each new condition adds cost and extends the approval process. Even if the development is eventually approved, the imposed requirements can change the financial viability of the entire project.
Market Perception
Main roads carry constant traffic - cars, trucks, buses, motorcycles - all accelerating, braking, and changing gears as they navigate the roundabout. The acoustic environment is relentless.
Families with children, downsizers, and owner-occupiers often reject sites they perceive as unsafe or noisy. This limits your buyer pool and can push your target demographic toward investors, who in turn expect higher yields or lower entry prices.
Even with extra measures to reduce interior noise, private open space areas (like front courtyards or balconies) may remain noisy and uncomfortable. For buyers, that’s a red flag.
Valuers also tend to apply small but noticeable discounts for properties affected by high-traffic environments. Over multiple dwellings, this can erode profit margins significantly, or make it harder to obtain construction finance.
The Bottom Line
On paper, a townhouse site near a main-road roundabout might tick a few boxes: good exposure, easy access to arterial routes, and perceived convenience. But under the surface, it’s one of the most complex development scenarios a small-to-medium property developer can take on.
That doesn’t mean these sites are impossible, but they demand early feasibility work and specialist advice from traffic engineers, acoustic consultants, and experienced planners before any contract is signed.
In some cases, converting the concept from townhouses to commercial or mixed-use may deliver a better planning outcome. In others, walking away is the smarter play.
Ultimately, when it comes to townhouses, liveability sells. And no matter how clever the design, a roundabout on a main road rarely delivers the calm, connected lifestyle that buyers are looking for.
