For sellers & agents
The number does not change with who is asking.
The same independent planning-evidence base that tells a buyer what a site is worth on its planning reality tells a seller, and their agent, exactly the same thing. A site’s comparable approval record, its refusal pattern, the density the borough has actually consented: these read the same whichever side of a transaction you sit on. A seller who knows them can price and market on evidenced planning reality rather than hope value.
Asking price meets the planning record
Land and small-site values are set, in large part, by what can actually be consented on the plot. A buyer running their diligence already reads the borough’s decision record to test that. The seller who has read the same record arrives at the table on the same footing: a realistic view of the unit count and density the borough has approved on comparable sites, and the refusal reasons that recur on schemes like theirs.
That is not a tool for inflating a price. It is a shared, checkable basis for the conversation. The methodology is open and published, so any figure can be examined rather than taken on trust, by the seller, the agent, and the buyer alike.
For the agent marketing the site
An agent preparing particulars for a development plot is making a planning claim, explicit or implied, about what the site will carry. Grounding that claim in the borough’s actual decision record, rather than a headline borough approval rate or an optimistic capacity sketch, is what lets the marketing survive a buyer’s diligence rather than unravel in it.
The free borough dashboards already carry each borough’s approval rate, refusal taxonomy and quarterly trend, for all 33 London boroughs, with no sign-up. They are the right starting point for any agent who wants to see the evidence base before a site goes to market.
The same assessment, from the seller’s side
A Site Assessment on a site you are selling is the same brief a buyer would commission, built from the same decided record: the unit count and density the borough has actually approved nearby, the refusal reasons that recur, the comparable schemes. Handed to a prospective buyer, it is a number they can check rather than argue with, which is what tends to shorten a negotiation rather than prolong it.
It costs the same whoever orders it. A seller pays exactly what a buyer pays for the same site, because the figure is the same figure. That parity is the point: an assessment a seller could buy at a discount, or quietly load in their own favour, would be worth nothing to the buyer reading it, and so worth nothing to the seller either.
Same site, same number, same price. The evidence does not change with who is asking, so neither does the fee.
Working across a portfolio or a run of disposals? Tell us what you need.
Start with the published evidence
All 33 London borough dashboards are free, refreshed quarterly, with no sign-up. They carry the approval rate, refusal pattern and quarterly trend that set the planning context for any site.
The full method, and its limits, are set out on the methodology page.