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Planning risk is the gap between what you want to build and what you are likely to get approved. Here is how to assess it systematically.
Every development site carries planning risk -- the probability that your application will be refused, or approved with conditions so onerous they undermine viability. Understanding this risk before you commit capital is fundamental to sensible property development.
Policy risk: How well your proposal aligns with Local Plan policies. A high local refusal rate is a strong signal.
Heritage risk: Impact of listed buildings, conservation areas, scheduled monuments, and archaeological priority areas.
Environmental risk: Green Belt, AONB, National Parks, SSSIs. Green Belt carries the highest risk due to the strong presumption against development.
Flood risk: Scored directly from flood zone classification. Zone 3b is often a show-stopper.
Amenity impact: Overlooking, overshadowing, noise, disturbance to neighbours. Larger schemes carry higher risk.
Highways and access: Can the road network handle the traffic? Highways objections remain one of the most common reasons for refusal.
Design sensitivity: How important is design quality in this location? Sites in conservation areas face higher scrutiny.
Viability and obligations: Can the scheme bear affordable housing (often 35%), CIL, and S106 costs?
Precedent matters enormously. Similar schemes approved nearby is strong evidence yours should be too.
Five-year housing land supply: If the council cannot demonstrate this, the "tilted balance" shifts presumption towards approval for housing schemes.
Pre-application advice from the local planning authority gives you a direct read on the officer's likely recommendation.
Manually assessing planning risk means reading the relevant Local Plan policies (hundreds of pages), checking planning history, reviewing Environment Agency flood data, and searching Historic England's database. A thorough risk assessment for a single site might take a planning consultant half a day.
UrbanCode's Analyst Agent produces a composite risk score across all eight categories. It runs constraint checks and planning application searches in parallel. Each category is scored from Very Low to Very High. These are combined using a weighted average -- policy risk carries 25%, heritage 20%, environmental and flood 15% each.
The result is an overall risk score from 0 to 100 with a plain-language risk level and specific recommendations. High heritage risk triggers advice to engage a heritage consultant. High flood risk prompts a recommendation to commission a Flood Risk Assessment.
As a screening tool for site acquisition, it lets you focus your consultant's time on the sites that actually warrant it.
Try this yourself at urbancode.ai
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