What Makes a Perfect Townhouse Development Site? (The 2026 Criteria)

https://www.youtube.com/watch?v=5EBlXfJTk0I

Most people think a ‘perfect townhouse development site’ is about the best suburbs, the street, or how cheap they can buy it.

It’s not.

I’ve seen people buy what looks like an absolute weapon of a site… and six months later, they’re stuck, bleeding cash, or redesigning everything.

In this article, I’m going to walk you through exactly what makes a perfect townhouse development site in 2026, how the new planning laws in Victoria have changed what may be possible, what the recent ResCode changes mean in practice, and the quiet deal killers most people don’t even realise they’re stepping into.

This is especially true when assessing development sites in Melbourne, buyers are targeting right now.
Planning overlays and access rules vary suburb to suburb.

If you’re buying or already own a site, think of this as your property development due diligence checklist. It could save you hundreds of thousands by helping you identify problems before you commit. That’s true whether you’re learning how to find profitable development sites from scratch or pressure-testing one you’ve already got your eye on.

Alright, so let me level with you for a second.

When people ask me what makes a perfect development site, most of them are actually asking the wrong thing.

They’re focused on everything around the site instead of the site itself. But none of that matters if the site itself doesn’t actually work.

One really important thing before we go any further is that there is no such thing as a perfect site on its own.

A site that works well for a side by side dual occupancy doesn’t necessarily work for three or four townhouses.

And a site that works for a double-storey build can be completely wrong for a single-storey dual occupancy.

What does exist is a set of fundamentals that overlap almost every development.

And that’s what we’re talking about today.

If you’re still trying to work out how to find development sites, that’s a separate skill entirely. Most people underestimate it.

And by the way, if you’re serious about doing a development project, make sure you join our free property development network, the Little Fish Network.

It has literally thousands of property developers helping each other every day.

Townhouse Development Site Orientation

Let’s start with site orientation, because this is the one people say they understand… but rarely act on.

Orientation is really just asking a simple question: where’s the sun actually hitting the house?

And the reason it matters is because you don’t properly notice it until the place is built.

And once it’s built, you don’t get a second chance to fix it.

The ideal scenario is pretty straightforward.

You want your main living areas and your backyard facing north.

North-facing homes feel better to live in, they’re cheaper to run, and they generally sell better. There’s nothing complicated about that.

Where people get caught is when they assume orientation will just sort itself out during the design phase. It doesn’t.

For example, if you’re building townhouses, you can often design the layout so most of them still get decent northern light.

But if you’re doing a side-by-side dual occupancy, sometimes one gets the better orientation, and the other doesn’t.

That doesn’t automatically kill the site, but you need to understand that trade-off before you buy, not after you’ve already committed.

Orientation isn’t about getting everything perfect.

It’s about knowing what you’re giving up and deciding whether the deal still makes sense once you do.

The Importance of Access

Alright, access.

This is one of those things that sounds boring until it completely ruins your project.

Access is basically just asking one question, how do people actually get in and out of what you’re trying to build?

And what catches people out is that access isn’t something you can design your way out of if it doesn’t work.

You either can get cars in properly… or you can’t.

If you’re doing a side-by-side dual occupancy, ideally, you want two driveways at the front. Simple.

If you’re doing a front-and-back layout, one driveway can work, but then the front place becomes the hero, and the one at the back lives or dies by how that driveway actually feels to use.

Now this is where things usually fall apart.

They look at the frontage and think, ‘Yeah, should be fine.’

But they don’t notice the things that actually site access, power poles, street trees, bus stops, speed humps.

Any one of those can stop you from putting a driveway exactly where you need it.

And yes, some of them can be moved.

But that’s where risk comes in.

A tree might be cheap to remove, depending on the tree and the approvals involved.

A power pole is going to cost you money, and it won’t be cheap, so that needs to be factored in early.

And some things, like bus stops, may not get approved to move at all.

I’m not saying you can or can’t move any of these.

What I’m saying is you need to understand the impact, the risk, and the potential cost before you commit to the site.

So, access is one of those early checks where you either get a clean tick… or you slow right down and do proper due diligence before you touch it.

Because once you own the site, you don’t get to pretend this stuff doesn’t matter anymore.

Understanding Slopes

A site with a slope is another one people love to brush off.

I hear it all the time, ‘She’ll be right, we’ll figure it out.’

That mindset is exactly how budgets blow out.

The reason sloped sites are usually cheaper is because people who know what they’re doing already understand the pain that can come with them.

A small amount of fall can actually be a good thing.

A few steps down into a living area, with higher ceilings, which can look really good when it’s done properly.

But that’s a small slope.

When you’re dealing with metres of fall across a site, everything changes.

Suddenly, you’ve got split levels everywhere, compromised layouts, retaining walls, extra excavation, more concrete, more engineering.

And the thing people underestimate most is how much slope affects the quality of the design, not just the cost.

You might still be able to build on the site, but the end product can feel awkward, chopped up, or just inferior compared to flatter sites nearby.

So, when you come across a site with a slope, it’s not about avoiding it altogether.

It’s about understanding exactly what you’re taking on before you convince yourself you’ve found a bargain.

Because if you properly understand the impact the slope will have, and you’ve factored everything in. That knowledge can actually work in your favour.

It can help you unlock a cheaper site that others won’t touch, simply because they don’t understand what needs to be allowed for.

And in this game, knowledge really is money.

Townhouse Development Site Dimensions

Now let’s talk about dimensions.

This is where people try to make a site do something it just doesn’t want to do.

This is common when assessing residential development sites. Frontage, depth and access all interact with planning controls.

The goal with development is to keep designs as standard and efficient as possible.

That’s how you control costs, which matters more than ever with build costs up and development margins under pressure. We recently broke down what’s working in property development in 2026, including the types of projects and strategies that still stack up in the current market.

So, for example, a double-storey dual occupancy works really well on around fifteen to seventeen metres of frontage.

Depth matters too, around thirty-five metres gives you room to breathe, decent backyards, and sensible layouts.

With the more recent planning changes limiting front setbacks, longer backyards are actually easier to achieve now than they used to be.

Single-storey Dual Occupancies

Single-storey dual occupancies are different. You’re building everything on the ground floor, so you need more length, closer to forty metres if you can get it.

Multi-townhouse sites need both width and length.

You need room for a driveway, the dwellings themselves, and private open space, all without squeezing the life out of the design.

Knockdown rebuilds are the most flexible, but even then, a single-storey needs more land than a double-storey.

The mistake is trying to force a design because you want the site to work, instead of being honest about what it actually supports.

The big thing I want you to take away from this is that not every site needs to be perfect.

Some things are deal breakers, no question.

And some things are just trade-offs you’re consciously choosing to make.

Wrapping Up

A site might be great for orientation, average for access, and still work really well overall.

But you only get to make those calls if you actually understand the site properly before you buy it.

That’s why development isn’t something you do in isolation.

You need the right people around you, if you don’t already have that support around you, that’s where we can help.

If you just want someone experienced in your corner to pressure test a site or talk through decisions as you run the project yourself, I offer one-on-one property developer mentoring.

If you want access to better opportunities in the first place. We also run a buyer’s agent service where we’re sourcing and filtering sites all day, every day.

And if you’d rather have the whole thing handled by experts from start to finish, we also offer full property development management, where my team runs the project end to end.

You can book a call directly with me if you want to talk through what makes the most sense for you.

But if you only remember one thing from this article, remember this:

The best townhouse development sites aren’t the ones that look the best on paper or feel the nicest at first glance.

They’re the ones where the constraints are understood, the compromises are clear, and the numbers, the design, and the planning all work before you commit.

And if you haven’t already, you can also jump into our free property developer network, the Little Fish Network. There are thousands of developers in there sharing insights and helping each other win.

Filled under: All Design Developer Insights