Insights · Property · 8 min read

Promotion vs option vs collaboration agreement — what's the difference?

When a developer or land promoter approaches a UK landowner, the first piece of paper that lands is almost always one of three documents — a Promotion Agreement, an Option Agreement, or a Collaboration Agreement. They look superficially similar and use overlapping language. But the risk-and-reward profile for the landowner is materially different in each. Here is what they actually do.

1. Promotion Agreement

The simplest definition: the promoter takes the land through the planning process at the promoter's cost, and is paid out of the eventual sale proceeds.

Mechanically, the landowner remains the legal owner of the land throughout the planning period. The promoter has no right to buy the land themselves. When planning is granted (and the conditions in the agreement are met), the land is marketed openly and sold to a third party — usually a housebuilder. The proceeds are split.

What the landowner takes home is the gross sale price minus the promoter's recoverable costs and the promoter's share. The split is the central commercial term: usually expressed as a percentage of net proceeds (commonly 12.5% to 25% to the promoter), with a cap on what costs can be recovered first.

The risk-and-reward profile. The landowner trades certainty for upside. They give up immediate value (the land is locked in for years) in exchange for a share of the eventual planning-uplifted value. The promoter takes the entire financial risk of planning failing — but if planning succeeds, they share the upside in proportion. This aligns the parties well: both want the highest possible price for the eventual sale.

2. Option Agreement

An option agreement gives the developer the right (but not the obligation) to buy the land at a future date, at a price set by the agreement.

The price is sometimes a fixed sum agreed upfront, more often a percentage of open market value with planning (typically 80–90%) determined by an independent valuer at the point of exercise. The developer typically pays a small option fee at signing — sometimes a few thousand pounds, sometimes much more for prime sites.

Critically, the developer does not have to exercise the option. If planning is granted and the market is good, they buy; if planning fails or the market turns, they walk away and the landowner keeps the option fee. The option period is usually 5–10 years.

The risk-and-reward profile. The landowner gets less of the upside than under a promotion agreement (the developer keeps 10–20% as their margin, plus whatever costs they recover) and bears more of the timing risk. The trade-off is that the option route gives the developer their own profit margin baked in, which is attractive when the developer also intends to build out the scheme themselves, not just sell on.

You see option agreements most often where the buyer is a housebuilder rather than a pure land promoter.

3. Collaboration Agreement

A collaboration agreement (sometimes called a "co-promotion agreement", "joint venture light", or just "JV") is the partnership variant. The landowner and the developer share both costs and proceeds, in agreed proportions, on agreed terms.

The structures vary widely. Sometimes the landowner contributes the land at agreed value and the developer contributes cash for planning costs, and the proceeds are split pro-rata to those contributions. Sometimes both parties bear costs in agreed shares. Sometimes profit is calculated only after a hurdle return for one party.

Collaboration agreements are most common where the landowner is sophisticated, has multiple sites in play, or wants the upside of the promotion process without losing all control over the strategy. They also surface where there are multiple landowners (consortium of farmers, for example) and the developer needs everyone aligned.

The risk-and-reward profile. The landowner takes on some financial risk (contributing to planning costs) in exchange for a larger share of the eventual proceeds. Most upside, most active involvement, most paperwork.

Which is right for me?

It depends on three questions:

1. How much certainty do you need now? If you need cash now or a fixed exit value, lean towards option. If you can wait and want maximum upside, lean promotion or collaboration.
2. How much risk do you want to take? Promotion is the most passive route for the landowner — the promoter takes the financial risk. Collaboration trades some risk for a bigger share.
3. How sophisticated is the counterparty? Established UK promoters use promotion agreements as their bread-and-butter. National housebuilders prefer options. Smaller or boutique developers may propose collaboration deals.

A more detailed checklist of specific clauses to read first in a Promotion Agreement is in the free briefing Five things to check on your promotion agreement.

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Taran Legal is not a firm of solicitors and is not regulated by the SRA. This briefing is for general information only and is not legal advice on any specific matter.