The Runnymede Planning Application That Was Approved in Six Weeks Because of One Document Nobody Else Submitted

Six weeks. Not eight. Not ten. Six weeks from submission to approval. In a borough where most applications take the full eight week determination period and some stretch to twelve.

Our runnymede planning application was fast tracked. Not because we paid extra. Not because we knew someone at the council. Because our architect submitted one document that most applications dont include. A flood risk assessment.

Our property sits near the Thames in Egham. Parts of Runnymede fall within flood risk zones. Our house is in Flood Zone 2. Not the highest risk category but high enough that the council needs to see evidence that you have considered flood risk before they approve any extension.

Most architects submit standard drawings and let the council raise flood risk as a query during the assessment. That query adds weeks. Our architect addressed it upfront. The officer had everything they needed from day one. No queries. No delays. Six weeks to approval.

Why Flood Risk Matters in Runnymede

Runnymede Borough Council covers an area that includes significant Thames floodplain. Egham, Thorpe, parts of Chertsey, and areas around the river are all affected to varying degrees.

If your property sits within Flood Zone 2 or 3, any planning application needs to demonstrate that the development wont increase flood risk and that appropriate resilience measures are incorporated into the design.

This doesnt mean you cant extend. It means you need to show the council you have thought about it. What floor level the extension will be built at. What materials will be used below the predicted flood level. How surface water drainage will be managed so the extension doesnt increase runoff into the floodplain.

Most homeowners dont know their property is in a flood zone until the council raises it as an issue during the application. Then everything stops while the information is gathered, a flood risk assessment is commissioned, and the document is submitted as additional information. Three to six weeks of delay. Sometimes more.

What Our Architect Did Differently

During the first site visit our architect checked the Environment Agency flood maps. Free online. Takes two minutes. Our property showed as Flood Zone 2. Not a surprise given the proximity to the Thames. But information that needed to be acted on before submission not after.

He commissioned a flood risk assessment from a specialist consultant. The assessment confirmed the flood zone designation, identified the predicted flood levels for our specific location, and recommended design measures for the extension.

The measures were straightforward. Extension floor level set 150mm above the predicted flood level. Water resistant materials used below the flood line. Non return valves on drainage connections to prevent backflow during flood events. Permeable paving on the patio to manage surface water runoff.

None of these measures added significant cost. A few hundred pounds for the non return valves. The permeable paving was something we wanted anyway. The floor level adjustment was built into the design from the start.

The flood risk assessment itself cost about six hundred pounds from the consultant. A fraction of the cost of the delays it prevented.

What Six Weeks Versus Twelve Weeks Means

Six weeks of delay doesnt sound dramatic. But on an extension project every week of delay has a cost.

Builder availability. The builder we wanted had a start date in May. A twelve week planning determination would have pushed us past that date. He would have taken another job. We would have waited for his next available slot. Potentially months.

Material costs. Construction costs increase monthly. Six weeks of additional waiting means quoting for materials at higher prices.

Lifestyle. Six more weeks in a kitchen that doesnt work. Six more weeks of the frustration that made us want to extend in the first place.

Our six week approval meant the builder started on schedule. Materials were ordered at the prices originally quoted. And we were cooking in the new kitchen before the summer ended.

What Runnymede Homeowners Need to Check

Before you design anything check the Environment Agency flood maps for your property. Free. Online. Two minutes.

If your property is in Flood Zone 1 you are in the clear. Standard application. No flood risk assessment needed.

If you are in Flood Zone 2 or 3 you need a flood risk assessment submitted with your application. Commission it early. Include it with the original submission. Dont wait for the council to ask for it.

The assessment costs five hundred to eight hundred pounds depending on the consultant. The delay it prevents is worth many times that in avoided programme disruption and builder scheduling complications.

Your architect should check this automatically during the first site visit. If they dont mention flood risk for a property near the Thames in Runnymede, they havent done their homework.

Six to eight months from first conversation to completion. Our six week approval shaved two to four weeks off the programme compared to a standard timeline. Because one document submitted proactively prevented the most common delay in Runnymede planning applications.