Flood Risk Assessment in Darlington

A flood risk assessment in Darlington usually starts with the River Skerne. The river runs south through the middle of the town, past Haughton-le-Skerne, the town centre and South Park, and it has been flooding Darlington streets since at least 1771. Cocker Beck and West Beck feed it from the west, and the Tees marks the borough's southern edge. Even so, surface water is what the council is called out to most often.

Our consultants write flood risk assessments in Darlington for planning applications, purchases, mortgages and insurance, as well as sequential and exception tests and surface water drainage strategies. On this page Darlington means the town and its suburbs, mostly in the DL1 and DL3 postcode districts. That takes in Harrowgate Hill, Whinfield and Haughton-le-Skerne to the north, Cockerton, Mowden and Hummersknott to the west, Blackwell, Firthmoor and Eastbourne to the south, and Red Hall and Lingfield to the east. It also covers the borough's villages by the Tees in DL2, such as Hurworth-on-Tees, Hurworth Place and Neasham, along with Middleton St George and Great Burdon. Darlington Borough Council is a unitary authority, so it decides planning applications and acts as lead local flood authority itself. Durham County Council does both jobs in the rest of the county, which our County Durham page covers.

On 27 November 2012 the Skerne at John Street rose to 2.18 m, the highest reading that gauge has taken and above the 2.10 m mark at which the Environment Agency says homes and businesses can start to flood.

To talk through a site anywhere in the borough, call 01293 214444 or email enquiries@unda.co.uk.

Which rivers and becks put a Darlington site at risk?

Three kinds of watercourse matter here. The Skerne is a slow lowland river with a wide, flat floodplain north of the town. Through Darlington itself it runs in a channel that has been straightened, deepened and widened since the 1870s. Cocker Beck and West Beck are smaller main rivers that cross the western suburbs to join it. The Tees is far bigger. It forms the boundary with North Yorkshire.

Where a beck runs in a pipe under a plot, the landowner takes on a riparian owner's duties. Our notes on what a culvert is and who owns it and on riparian ownership explain what that involves. Our River Tees page follows the river from Cross Fell to Teesmouth, and the next town downstream with a page of its own is Middlesbrough.

Three Skerne warning areas, and the gauges that trigger them

The Environment Agency issues flood warnings for the Skerne in three overlapping areas that together cover the river through the town and Great Burdon. In 2021 it said that 163 of the 433 properties in the town centre and Great Burdon area, just over 37%, had signed up. That is a low take-up for streets that have flooded before. Our live river levels map shows what each gauge below is reading now.

• Lower Darlington. The lowest area takes in Valley Street, John Street, Progress Way, Blackett Road, the lower end of Haughton Road, Riverside Way and Mill Lane.
• Central Darlington. The middle area adds Lodge Street, Russell Street, Ely Close, Park Place, Hird Street, Swan Street and the part of South Park by the cricket ground.
• Upper Darlington. The widest area runs from Haughton Bridge and Red Hall to Weir Street, Tannery Yard, South Terrace and Victoria Embankment.
• The Tees villages. Hurworth Place with Newbus Grange, and Neasham from Kent Bridge along Teesway, have warning areas of their own.

A gauge record tells you how high the water has been at one bridge. It says nothing about your plot. An assessment turns that history and the Environment Agency's model results into a flood level for the site, adds the climate change allowance for the building's lifetime, and checks how people would get out if the Skerne were rising.

Look up a Darlington postcode on the flood map

Enter a postcode to see the Environment Agency's flood zones, surface water risk and climate change outlook for that spot. The coral line traces the Office for National Statistics built-up area for Darlington, which runs from Harrowgate Hill to Blackwell and from Low Coniscliffe to Red Hall, so Hurworth, Neasham, Middleton St George and the borough's other villages fall outside it, although the search still works there. Outside the borough, our flood risk map does the same for any address in England.

Floods recorded in Darlington from 1771 to 2021

The Skerne's record is long. The channel works it prompted are the main reason the town centre has seen fewer property floods since the 1970s, and the list below comes from the council's flood studies and the Environment Agency's records.

1. 1771. The first flood known to have done widespread damage to property in the town came from the Skerne. The same year the Tees flooded Neasham, to a depth put at 15 feet.
2. 1875 and 1876. Two floods in 1875 ran from the gasworks at the upstream end of the town down to South Park, and the channel downstream was enlarged the following year.
3. November 1967. A temporary sewer laid in the river channel held the Skerne back, and 54 properties on Valley Street, John Street, Oxford Street, Mount Street and Parkgate flooded. Between 1970 and 1972 the Russell Street weir was lowered and the channel from Chestnut Street to John Street widened from 25 to 35 feet.
4. March 1979. Snow that fell on 17 March melted, then 40 to 50 mm of rain fell on the 28th. The Skerne overtopped Priestgate Bridge and ran onto the ring road, but no property flooded.
5. June 1982. Storms over west Darlington surcharged the Newton Lane culvert on West Beck, flooding two homes and blocking the road.
6. January 1995. The Tees set the Broken Scar record that still stands, and Kent Beck flooded 55 properties in Neasham.
7. November 2000 and February 2001. The Skerne flooded property in the town in both winters, and in November 2000 heavy rain flooded 23 properties at Faverdale and Morton Park.
8. August 2011. At Blackwell, a downpour came while the Tees was high, the surface water drains could not empty into the river, and streets flooded.
9. November 2012. The Skerne at John Street peaked at 2.18 m on the 27th, 8 cm above the level the Environment Agency links to property flooding. Neither of the council's flood studies records how many properties were affected.
10. January 2021. The Skerne overflowed its channel at Haughton-le-Skerne, the most recent entry in the Environment Agency's historic flood record for the borough.

Two things follow for a site. Channel works and banks cut the odds of flooding without removing them, and a high river can stop surface water draining away. Our note on residual flood risk explains how an assessment deals with the first. Our article on why a site stays in a flood zone after new defences sets out what the maps show.

Is surface water a bigger risk than the Skerne in Darlington?

By number of incidents, yes. Between January 2010 and January 2025 the council logged 1,660 flooding incidents: 948 from surface water, eight from rivers, eight from sewers and six from groundwater, with the rest unrecorded. Its 2011 preliminary assessment put about 2,000 properties at risk of 0.1 m of surface water in a 1 in 200 storm.

• Places with a history. The preliminary assessment named Pierremont, the Town Centre Fringe, Bedford Street, Faverdale and Morton Park, Heighington, Middleton St George, the airport area, Coatham Mundeville, Eastbourne and Lingfield.
• Work already done. Northumbrian Water spent £2 million on sewers at Pierremont in 2009 and 2010, then £2.2 million around Bedford Street, which included a 1.75 million litre storm tank under South Park.
• Areas still under study. The draft strategic flood risk assessment of October 2026 lists five opportunity areas for surveys and modelling: Cockerton, West Beck, Stanhope Road South, Stonedale Crescent, and Eastbourne with Haughton.
• Critical drainage areas. The adopted Local Plan refers to a 2010 study that made the Town Centre Fringe, east of the Skerne, a critical drainage area. The 2026 draft study says none is designated now. Which position the council applies to a given application needs confirming before it goes in.
• Gullies. Of the 467 incidents logged from February 2025 to January 2026, 404 were blocked gullies and the other 63 highway drainage.

On Flood Zone 1 land, a surface water flow path across the plot is usually what brings in an assessment. Our guide to surface water flooding and planning explains what the council will look for.

Clay, limestone and the QBar rule: draining a Darlington site

Darlington applies the Tees Valley local standards for sustainable drainage, written with Hartlepool, Middlesbrough, Redcar and Cleveland and Stockton-on-Tees. They are strict. Discharge from a site is held to QBar, the mean annual greenfield flow, in every storm, and previously developed land is expected to meet greenfield rates as well.

Before a layout is fixed, our ground conditions and soakaway checker gives an early read on the ground. The BRE 365 infiltration rate calculator works through test results, and our drainage calculators size the storage. Our guides on when infiltration testing is needed and on groundwater source protection zones cover the two questions that most often hold up a soakaway here.

Planning policy for flood risk in Darlington: the 2022 plan and its review

Applications are decided against the Darlington Borough Local Plan 2016-2036, adopted in February 2022, with chapter 18 of the National Planning Policy Framework. Its replacement is out for comment now. Representations on the Regulation 19 draft of the Local Plan Review 2025-2042 close at 5pm on 26 November 2026. As lead local flood authority the council also comments on the drainage of major schemes.

Comments on the review can still change it, but until the plan has been examined and adopted, Policy DC 2 remains the one the council decides applications against. The 2025 National Standards for sustainable drainage now apply alongside both plans, and our explainer sets out what they add.

Skerningham, Faverdale and the Town Centre Fringe: where Darlington is growing

Most of Darlington's new housing land lies on the northern and western edges of the town, close to the Skerne and its becks. Regeneration in the centre sits on the river itself.

• Skerningham. Allocated for up to 4,500 homes on 487 hectares north of the town, about 1,650 of them by 2036, with the Skerne along its northern boundary.
• Greater Faverdale. About 2,000 homes and 200,000 m² of employment space on 177.8 hectares in north-west Darlington, in the catchment of West Beck, which already floods by West Auckland Road.
• Coniscliffe Park. Two allocations on the western edge, where part of the land beside Baydale Beck is in Flood Zones 2 and 3 and the plan keeps development out of the functional floodplain.
• The Town Centre Fringe. The land east of the Skerne between Victoria Embankment and Skerne Bridge has had its own flood mitigation strategy since July 2012. The Local Plan treats the river there as a green corridor.
• Sites already in flood zones. Of the 86 possible sites screened for the adopted plan, 17 touched Flood Zone 2, 15 Flood Zone 3a and 11 the functional floodplain. Surface water reached further: 61 lay partly within the 1 in 30 outline.

On allocations of this size, the drainage decides how much land goes to ponds and swales. Agree the discharge rate with the council first; a layout drawn before that usually has to be drawn again.

Which sites need a flood risk assessment in Darlington, and which can do without one?

It depends on the flood zone, the size of the site, the proposed use and whatever else could flood it. National policy requires an assessment in Flood Zones 2 and 3, on Flood Zone 1 sites of a hectare or more, and where surface water or another source puts the land at risk. The council's 2019 study adds any site built over a culverted watercourse.

Where the sequential test applies, start it early. The council's own 2020 sequential and exception test paper for the Local Plan shows the kind of site-by-site comparison it expects to see.

Flood and drainage reports for sites from Cockerton to Neasham

Each report below answers a different question a Darlington site can raise. Our consultants are chartered and Unda is a CIWEM Business Partner; every report is checked and signed by a senior consultant before it goes to the council.

• Skerne-side sites. Homes or businesses near the river need a flood risk assessment for planning that shows the council and the Environment Agency they stay safe for their lifetime without pushing water onto neighbours.
• Every source at once. A flood risk assessment for a Darlington plot weighs the Skerne, the becks, surface water, sewers and groundwater together, because the flood zone map shows only rivers.
• Buying in a warning area. Searches often flag homes along the Skerne or at Hurworth Place, and a flood risk survey for property purchase looks at the building itself, its floor levels and its flood history.
• Homes in Flood Zones 2 and 3. Housing there usually needs the sequential and exception test before the council can approve it, the same test it applied to its own allocations in 2020.
• Major schemes. As lead local flood authority, the council reviews the drainage strategy for every major scheme alongside the flood risk assessment.
• Sites held to QBar. A surface water drainage strategy works out the site's QBar rate, tests infiltration where the ground allows it and sizes storage for the 1 in 100 storm plus climate change.
• Conditions on the permission. Where permission comes with a drainage condition, discharge of drainage conditions work supplies the calculations, details and maintenance plan the council needs before signing it off.
• Culverts and a record river. The Skerne has passed the level at which property floods, and the Newton Lane culvert has surcharged before. That is why flood modelling is used here to test a blockage or set a design level where national mapping is too coarse.
• Warning areas. A flood warning and evacuation plan links a building's occupants to the three Skerne warning areas that cover the town, or to those at Hurworth Place and Neasham.
• Homes that have flooded before. After the Skerne floods of 1967, 2000 and 2001 and the Neasham flood of 1995, a flood risk assessment for insurance gives an insurer evidence about a single property.
• Rising groundwater. Mine water rebound is lifting groundwater in the Skerne catchment, and the west of the borough has an emergence risk of its own, so a groundwater flood risk assessment checks basements and soakaways against it.
• Sewer flood risk. Northumbrian Water's data shows sewer flood risk in the town centre, Eastbourne, Cockerton and Hurworth-on-Tees, and a foul drainage strategy shows a scheme's waste water has somewhere to go.
• Firms by the river. A business continuity flood risk assessment plans how a firm on Progress Way, Blackett Road or Riverside Way, all inside the lower Skerne warning area, keeps trading through a flood.
• Employment land. Buildings on the 200,000 m² of employment space planned at Greater Faverdale can earn flood credits under BREEAM Pol 03, which is what a BREEAM flood risk assessment covers.
• Large allocations. On land the size of Skerningham, a flood risk feasibility study shows early how much can be built once the Skerne floodplain and the flow paths across the fields are mapped.

Who to call about flooding in Darlington: the council, the Environment Agency and Northumbrian Water

If floodwater puts anyone's life at risk, dial 999, and report a power cut on 105. Beyond an emergency, who to call depends on where the water is coming from:

Environment Agency flood warnings cost nothing, and anyone in the three Skerne areas, at Hurworth Place or at Neasham can sign up. The council also keeps sandbags for the people and buildings most at risk: call 01325 405111, or 07966 347101 out of hours.

Questions about flood risk, drainage and buying property in Darlington

To discuss a site anywhere from Harrowgate Hill to Hurworth, call 01293 214444 or email enquiries@unda.co.uk.