The split in a land joint venture is calculated from one ratio: the value of your land as a share of the total value the finished project will create. If your land is worth ₦200M and the completed development will sell for ₦650M, your land contributed roughly 30% of the outcome before a single block was laid, and negotiations start from there, adjusted for who carries risk. That’s the whole formula. Everything else you’ll hear in a negotiation is positioning around that number.
Most landowners never get shown this math. Developers quote a percentage, the family counters with a bigger one, and both sides argue with no anchor. This article gives you the anchor.
What actually goes into the calculation?
Three numbers decide everything: your land’s current market value, the total development cost, and the gross development value (GDV) — what the finished units will sell for.
Take a real shape of deal we see in Kano. A family owns 900 sqm in a strong district. Land value ₦150M. Construction of 6 terrace units at ₦75M each all-in = ₦450M total cost including professional fees, approvals, and marketing. The 6 units sell at ₦130M each = ₦780M GDV.
The contribution math:
- —Land: ₦150M of ₦600M total inputs (₦150M land + ₦450M cost) = 25% of what went in
- —Developer: ₦450M of ₦600M = 75% of what went in
If profit were shared purely by contribution, the ₦180M profit (₦780M minus ₦600M) splits ₦45M to the family and ₦135M to the developer. But contribution isn’t the only factor, and this is where landowners either protect themselves or get eaten.
Why doesn’t the split just follow the contribution ratio?
Because risk and time adjust it, and both usually adjust it in the landowner’s favour.
Your land is real today. The developer’s ₦450M is a projection that has to survive two years of cement prices, exchange rates, and approval timelines. That argues for the developer earning a premium for risk. True. But here is the part developers say less loudly: your land is also locked for those two years, you carry the risk of the developer underperforming, and in a strong district your land is the one input that cannot be substituted. Money can come from anywhere. Your plot cannot.
In practice, land contributing 25 to 30% of input value commonly negotiates to a 30 to 40% share of units or profit, precisely because land is the scarce input. When a developer offers you exactly your contribution ratio, they are pricing your land like money. It isn’t money. It’s the thing the money is chasing.
The second worked example: premium district, expensive land
Now flip the ratio. A plot in a premium Abuja district. Land value ₦400M. Build cost for 4 luxury units, ₦500M. GDV ₦1.4B. Land is now ₦400M of ₦900M inputs, about 44%. Deals shaped like this settle near 50/50, sometimes past it in the landowner’s favour, because at that land value the developer needs you far more than you need any particular developer.
This is why “what’s a fair percentage?” has no single answer, and why anyone quoting you a standard split before seeing your land is reciting, not calculating. Common splits you’ll see referenced in Nigerian legal practice—50/50 or 60/40—are outcomes of this math on specific plots, not rules.
What should you do with this before a negotiation?
Get your own estimate of the three numbers before any developer gives you theirs.
An independent valuer for the land. ₦100k–₦400k in most cities. It’s the best money you’ll spend in the whole process. For GDV, check asking prices of comparable new units in your district on the property portals, then discount 10 to 15%, because asking is not selling. For build cost, a quantity surveyor will give you a per-sqm range for your city.
Then, in the meeting, ask the developer for their three numbers and their math. A serious developer will show you the model. We do, line by line, because a landowner who understands the math signs faster and disputes never. A developer who says “don’t worry about the details, the split is generous” is telling you the details don’t survive scrutiny.
One honest cost of this model: the JV split only pays off if the project finishes and sells. If you need certain money on a certain date, a JV is the wrong instrument and selling might genuinely serve you better. We say this to families in our first meeting and it surprises them every time.
The reframe to leave with
You’ve probably been thinking of the split as the developer paying you a share for your land. Reverse it. In a JV, you are the one hiring capital and expertise, and paying for it with a share of your land’s future. You’re not the seller in the room. You’re the client.