I Bought a Derelict House on 900sqm of High-Density Land. Here Is What Happened.

I want to tell you about the worst house I have ever bought. And why it turned out to be one of the best investments in our entire portfolio.

The property sat in Cranbourne, in Melbourne's outer southeast. It was an off-market deal — the kind that never hits the portals because no agent in their right mind would want to photograph it. The owner's husband had passed away years ago, and she was moving into residential care. The house had been occupied by, well, let us say unofficial tenants for quite some time. Hoarders. The evidence was everywhere.

The gutters had grass growing out of them. The ceiling panels had gaps wide enough to fit your fist through. The flooring was buckled. The bathroom was a petri dish. Every tradesperson who walked through the front door turned around and walked straight back out.

But the land underneath all that chaos was 900 square metres of high-density zoned residential land. And that is what I was actually buying.

Why the land was worth more than anyone realised

High-density zoning in an established suburb is genuinely scarce. You cannot create more of it. The council does not hand out rezoning approvals like lollies.

Directly across the road from this property, a developer had already built five units on a similar-sized block. Each unit was listed at $720,000. Five units at $720K is $3.6 million in end value, built on a single residential lot that probably cost $700,000 to $800,000 a few years earlier 1.

And here is the thing — there were almost no other developable high-density lots left in the surrounding streets. The supply was essentially exhausted. Which meant any remaining block with the right zoning, the right size, and the right street frontage was going to attract developer interest for years to come.

A Cranbourne land parcel of this size, flat, with high-density overlay, was conservatively worth $850,000 as vacant land — just based on comparable developer site sales in the area. The house sitting on it, decrepit as it was, actually added a bit of residual value because it meant the land was generating some rental income while the buyer figured out their development timeline 2.

So the theoretical value of this property was $850K-plus. It ended up selling to me for $720,000. How?

The tree that scared everyone away

Right in the middle of the block stood a massive tree. I mean massive — canopy spreading across half the property, trunk diameter well above the threshold that triggers council protection.

Every developer who inspected the site saw that tree and ran the same mental calculation: if I cannot remove this tree, I cannot build my five-unit scheme. The tree sat precisely where the internal driveway would need to go. It was, effectively, a development-killing obstacle planted right in the centre of a $3.6-million opportunity.

Multiple developers walked away. The asking price drifted lower. The agent started losing enthusiasm.

I saw the same tree. But I also noticed something nobody else had bothered to check: the root system was starting to encroach on the house foundations. There were visible cracks in the concrete slab near the tree's drip line. The roots were undermining the existing structure.

I called a tree removal company I had worked with before. Sent them photos and videos. Their assessment: there was a strong case for an arborist report recommending removal on structural damage grounds. If you can demonstrate that a protected tree is causing material damage to an existing dwelling, the council will typically approve removal — even under an overlay 3.

Suddenly, the development-killing obstacle was potentially a development-enabling opportunity. And nobody else in the market had done the homework to figure that out.

Getting the deal done when communication is impossible

There was one more barrier that had defeated every other buyer: the vendor herself.

She was Japanese, elderly, spoke very limited English, and had some cognitive difficulties. The agent struggled to communicate with her. Buyers who booked inspection times would turn up only to find her refusing to open the door. She had turned away multiple people who she felt were not genuine.

I am not going to pretend I handled this gracefully. I downloaded a translation app, memorised a handful of Japanese phrases, and went to the property multiple times. I brought a translator on two occasions. I sat on her porch and explained, in broken Japanese supplemented by a phone screen, that I intended to take good care of the property and that I understood it meant a lot to her.

It took several visits. Eventually, she agreed to sell to me at $720,000.

Was this efficient? No. Was it comfortable? Also no. But the discomfort of spending three weekends building rapport with an elderly Japanese woman was worth approximately $130,000 in below-market-value acquisition 4.

This is a pattern I see constantly in off-market deals: the properties that are genuinely underpriced are underpriced for reasons that involve human complexity, not just market forces. Estate sales, divorces, language barriers, family disputes — these situations create pricing inefficiencies that a standard market search will never surface.

The renovation: making it liveable while protecting the option

Once settlement completed, I had a decision to make. Do I develop immediately, or do I renovate the existing house, rent it out, and hold the development option for later?

I chose to hold. Here is why.

Developing five units would require council approval (12-18 months), construction (another 12-18 months), and substantial capital — probably $1.5 million to $2 million in total project costs. My cash position did not support that timeline, and I had other acquisitions I wanted to pursue in the near term.

So instead, I spent roughly $50,000 to $60,000 bringing the existing house up to a rentable standard. New flooring throughout, full repaint internally and externally, bathroom renovation, kitchen upgrade (keeping costs controlled with IKEA-grade cabinetry), gutter replacement, and general cleanup of the yard. The tree removal application was lodged with council, and it was approved — removing the single biggest obstacle to future development 5.

The property is now tenanted and generating rental income while I hold it. The bank valuation came in at $850,000 six months after purchase, which was exactly in line with my pre-purchase estimate based on comparable developer site sales 6.

That is $130,000 of equity created by buying what nobody else wanted, doing the homework that nobody else did, and spending $50,000-$60,000 on a renovation that most people would have considered pointless on a house destined for demolition.

But here is the logic: the renovation generates rental income during the holding period, which covers the mortgage. Meanwhile, the land continues to appreciate, and the development option remains available whenever the timing and capital alignment is right. The worst outcome is that I hold a cash-flow-neutral property on 900 square metres of high-density land in an established suburb with demonstrated developer demand. That is a very comfortable worst case.

The numbers behind high-density development potential

Let me walk through why 900 square metres of high-density zoned land is worth getting excited about. The maths tells the story better than I can.

In Cranbourne, a standard three-bedroom unit on a subdivided lot sells for approximately $650,000 to $720,000 in 2021. The development yield — meaning how many dwellings you can fit on a high-density block — depends on a few factors: street frontage, setback requirements, car parking, and the mandatory garden area under ResCode.

On a 900-square-metre block with adequate frontage, you can typically achieve four to five dwellings. Let us use four to be conservative. At $680,000 each (median for the area), that is $2.72 million in gross end value.

Construction cost for a basic townhouse in Melbourne's southeast runs roughly $1,800 to $2,200 per square metre for a mid-specification build. A three-bedroom, two-bathroom townhouse of 140 square metres costs approximately $280,000 to $310,000 to build. Four of them: $1.12 million to $1.24 million 5.

Add the land cost ($720,000), council contributions ($40,000 to $60,000), professional fees — architect, engineer, planning consultant, building surveyor — ($60,000 to $80,000), holding costs during the 18-24 month development period ($50,000), and contingency ($50,000).

Total project cost: approximately $2.04 million to $2.15 million. Gross end value: approximately $2.72 million. Gross development margin: approximately $570,000 to $680,000.

That is the theoretical upside of this site. Now, development is not something you jump into casually. Planning risk is real — councils reject applications, neighbours object, and the VCAT process can add twelve months to your timeline. Construction risk is real — builders go bust, materials prices spike, weather delays accumulate.

But the optionality is what matters. While I hold this property, collecting rent and watching the land appreciate, I retain the option to develop when conditions are right. If construction costs come down, or if townhouse prices increase, the margin improves. If they do not, I still own a cash-flow-positive property on scarce land in an established suburb.

This is why I bought what looked like a rubbish house. The house was not the asset. The 900 square metres of high-density zoned dirt underneath it was the asset. Everything else was just noise that kept other buyers away and let me buy at a discount.

What this deal teaches about finding undervalued property

Every property that is genuinely undervalued has a reason. Nobody leaves money on the table accidentally. The question is whether the reason is a genuine problem or a perceived problem.

Genuine problems — things like flood zones, contaminated soil, restrictive covenants, structural failure — these kill value permanently. A flood zone does not go away because you are clever. These are what we call hard vetoes in our due diligence process, and we walk away immediately when we encounter them 7.

Perceived problems — things like cosmetic disrepair, difficult vendors, trees that look immovable, bad smells, hoarder residue — these suppress value temporarily. They scare away the 95% of buyers who make decisions based on first impressions. But they are solvable, usually for a fraction of the discount they create.

The Cranbourne property had three perceived problems (cosmetic disrepair, difficult vendor, development-blocking tree) and zero genuine problems (no flood zone, no contamination, no structural failure, no restrictive covenant, flat topography, correct zoning). The gap between the perceived problems and the actual risk was $130,000.

I look for this gap in every acquisition. The most profitable properties in our portfolio — and we have completed more than 350 transactions across Melbourne — are almost always the ones that other buyers rejected for reasons that turned out to be solvable 8.

Our team does between 30 and 40 property inspections per week across Melbourne's southeast. Steven and Edward, our field inspection specialists, check every property for the hard vetoes: slope greater than 2 metres, flood zone overlays, high-voltage easements, sewer lines through the centre of the block, heritage restrictions. If any of these are present, we move on immediately regardless of how attractive the price looks.

But if the property is clean on the fundamentals and the price is low because of fixable cosmetic or situational issues? That is when we get interested.

Frequently asked questions

How do I check if a property has high-density zoning? Go to the Victorian Planning Maps portal (mapshare.vic.gov.au/vicplan) and search the address. The zoning will be listed — look for RGZ (Residential Growth Zone) or equivalent high-density designations. The zone determines how many dwellings you can theoretically build on the site, subject to council approval.

Is it worth buying a property just for the land value? Yes, if the land value exceeds 80% of the purchase price and the property generates enough rental income to cover holding costs during your ownership. We treat the building as a temporary income-generating structure while the land appreciates and the development option matures.

How do I get a protected tree removed? You need a certified arborist report demonstrating that the tree is causing structural damage to an existing building, or that the tree itself is diseased or dangerous. The application goes to your local council. Approval typically takes 4 to 8 weeks. Cost for the arborist report is around $500 to $800 9.

What renovation budget should I plan for a derelict house? For a property that needs full cosmetic renovation but has sound structural bones, budget $40,000 to $70,000. This covers flooring, painting, kitchen, bathroom, general cleanup, and minor repairs. If structural work is needed (foundations, roof framing, stumps), add $20,000 to $50,000 depending on severity. Always get a building inspection before purchase to understand the scope 10.