Flood Risk Assessment in Newton Abbot

A flood risk assessment in Newton Abbot starts with the River Lemon. It runs off Dartmoor, through a culvert beneath the town centre and into the tidal Teign just below the town, and in December 1979 it carried almost twice what that culvert can pass. Holbeam Dam, built after that flood, now protects much of the centre, with walls along both rivers. The Teign's tide, Aller Brook and the small channels around Jetty Marsh still flood. We prepare flood risk assessments in Newton Abbot for planning, house purchase, lending and insurance, alongside sequential and exception tests and surface water drainage strategies.

This page covers the built-up area as the Office for National Statistics draws it. That runs from Highweek and Bradley in the west, across the centre and Knowles Hill, to Buckland, Milber and Wolborough, all in the TQ12 postcode district and Teignbridge district. Kingsteignton, across the Teign, has its own outline and is not drawn, although the council plans the two towns together as one garden community.

On 27 December 1979 the Lemon reached about 60 cubic metres a second, against the 35 the town-centre culvert can carry. Holbeam Dam was the answer, yet the Level 2 SFRA finds the town's defences would be overtopped in a 1% flood under a higher central climate change scenario.

For a site in Newton Abbot, from Wharf Road to the edge of Bradmore, call 01293 214444 or email enquiries@unda.co.uk with the address and a few words on the plans. One of our consultants will tell you which reports it needs.

Is Newton Abbot in a flood zone? The Lemon, the Teign and Aller Brook

Parts of it are, and they are the low, central parts. Our own overlay of the Environment Agency's Flood Map for Planning on the ONS outline, run in October 2026, puts about 11% of the built-up area in Flood Zone 2 or 3 and about 8% in Flood Zone 3. Around two-thirds of that Flood Zone 3 land is mapped as at risk from the river and the sea together, because the town sits where the Lemon meets the tidal Teign. The zones ignore the defences, so they show where water would go if the walls and the dam were not there.

What the three zones measure, and what Flood Zone 3b adds, is covered in our guide to flood zones in England. In Newton Abbot the zone is only the first question; the second is how well the defences between a site and the water will hold.

Finding a TQ12 address on the map

Enter a Newton Abbot postcode in the map below to see river, sea, surface water and reservoir extents around it, or open our full flood risk map for any site in England. The coral line is the town as the ONS outlines it. It cannot show the height of the walls along the Lemon and the Teign, the capacity of the culvert, or how a leat behaves when the estuary is high. Near the river, those are what decide the case.

Why Holbeam Dam was built: Newton Abbot's flood record

The Level 2 Strategic Flood Risk Assessment that JBA Consulting prepared for Teignbridge in 2021 and 2022 lists the events that shaped the town's defences. Devon County Council's investigation of Storm Bert adds the most recent:

1. 6 August 1938. About 130 mm of rain fell in ten hours and the River Lemon flooded Newton Abbot.
2. 27 December 1979. After 180 mm of rain in two days, with high tides holding the water back, Newton Abbot and Kingsteignton both flooded badly. The flow in the Lemon was reported at 60 m³/s; the culvert under the town centre takes 35 m³/s. The Newton Abbot Flood Alleviation Scheme, Holbeam Dam among its works, followed, along with a separate scheme for Kingsteignton.
3. November 2012 and December 2013. Heavy rain flooded three properties in Newton Abbot and nine in Kingsteignton in 2012, and more property in the town in December 2013. The Union Bridge gauge on the Lemon recorded its highest level, 2.29 m, on 24 December 2013.
4. May 2015. In an extreme rainstorm numerous properties were affected by surface water and by Aller Brook coming out of its banks.
5. 24 November 2024, Storm Bert. Five commercial units flooded inside: one off Jetty Marsh Road where water came over the embankment from Whitelake, and four on The Avenue from a leat, most likely because Whitelake was running high downstream. Upstream, the Stover Canal and an old railway embankment breached and about a million tonnes of water poured into the Sibelco quarry, which the county thinks may have spared the town worse flooding.

The county's Storm Bert report recommends further work with the Environment Agency and Teignbridge on how Newton Abbot floods. A breach like the one at Stover is the kind of event our article on residual flood risk deals with, and our explainer on reservoir flooding covers the dams upstream.

Defended, but not for every future flood

The SFRA finds that Holbeam Dam and the walls on the upper Lemon protect to better than a 1% annual chance flood. Lower down they do not: the walls and embankments along the Teign, and the Lemon near the confluence, are overtopped in a 1% event, and the town is described as highly susceptible to climate change. If a defence were breached, a site behind it could see fast, hazardous water within about 15 minutes. The SFRA also notes that detailed modelling of Aller Brook was not yet available, and that the county had commissioned an integrated surface water and sewer model of the Lemon and Aller Brook catchments.

• River Lemon at Newton Abbot. The warning for the Lemon names Bakers Park, the Bradley Lane Industrial Estate, the town centre, Queen Street and Osborne Park. Upstream, a separate warning covers Bickington down to Ogwell Mill.
• River Teign and its estuary at Newton Abbot. The estuary warning covers the Osborne Park area, the cricket ground, Marsh Road, Wharf Road, Quay Road and Forde Road. A third warning covers the racecourse, Newton Road and Pottery Road, just outside the coral line.
• Gauges. The Lemon is read below the dam at Holbeam, at Templers Road and at Union Bridge, where the normal range is 0.03 to 1.20 m. Aller Brook has a gauge at Kingskerswell.

Our live river levels map shows these gauges as they read now. For what an overtopped or breached wall means for floor levels and escape routes, see our articles on below-standard flood defences and culverts.

When does a flood risk assessment in Newton Abbot need the exception test?

Often, if the site is in the centre or by the estuary. Teignbridge District Council decides applications under the Teignbridge Local Plan 2020-2040, adopted in May 2026. Policy EN6 applies the sequential approach and asks for a site-specific assessment, with the exception test where it applies. It also wants a flood warning and evacuation plan in Flood Zones 2 and 3, and drainage built to the Environment Agency's standards in a Critical Drainage Area. Policy GC5 adds that town-centre schemes must be informed by the Garden Community Level 2 SFRA, sited on the lowest-risk part of the land and given safe access. Nationally, chapter 18 of the NPPF sets the triggers in policy F4, the two tests in F5 and F6, and the 2025 National Standards for sustainable drainage in F8.

Our guide to the sequential and exception tests sets out how the two tests run, and our article on extending a house in a flood zone covers the smaller cases.

Bradmore, Houghton Barton and the brownfield sites in the centre

Teignbridge plans Newton Abbot and Kingsteignton together, as a garden community. The Local Plan allocates about 370 homes on brownfield land in the towns and 1,310 more in the wider area, with 51 ha of employment land, on top of the Houghton Barton and Wolborough allocations carried over from 2014. Both groups raise flood questions, but different ones:

• Brownfield sites in the centre. The Cattlemarket (about 50 homes) and Forde Close on Brunel Road (about 150 homes on 2.8 ha) sit near the Lemon and the estuary. At Forde Close the plan notes the Environment Agency's 20 m climate change buffer next to mapped flood zones, which detailed modelling at application stage may narrow or widen.
• Bradmore. About 1,050 homes on some 67 ha west of Houghton Barton, outside the coral line. The land lies in a critical drainage area for the Lemon catchment, and the part south of the A383 is expected to help fund improvements at Holbeam Dam.
• Safeguarded land. Policy GC5 keeps land along the Lemon, the Teign and the Whitelake channel free for future defences, near Wharf Road, Jetty Marsh and the Brunel Industrial Estate. It also asks for long-term plans for the pitches at Cricketfield and Osborne Street as their flood risk grows.
• Upstream. The same policy looks for natural flood management above the town and a review of Holbeam Dam to keep its standard as the climate changes.

Where a site straddles the zones, the SFRA's advice is to put homes on the Flood Zone 1 land, use Flood Zone 2 for the less vulnerable parts, and keep Flood Zone 3b free of buildings. Our article on climate change allowances explains which figures a site in the town is tested against.

Draining a site above the Lemon: what Devon County Council checks

Devon County Council is the lead local flood authority and comments on surface water for major applications, judging them against Sustainable Drainage Systems: Guidance for Devon. Runoff from the hills ends up in the Lemon culvert and behind walls the SFRA expects to be overtopped as the climate changes. That is why these limits matter here:

• Greenfield rates. Runoff should never exceed the greenfield rate for the same return period, and brownfield sites should get as close to it as they can.
• Volume and long-term storage. Storage is tested on the 1 in 100 year, six-hour event, with long-term storage released at no more than 2 litres a second per hectare or Qbar.
• Climate change and creep. Peak rainfall is raised by 45% or 50% depending on location, and roof areas on housing by 10% for urban creep.
• Holbeam. Holbeam is one of Devon's critical drainage areas, where off-site flows must mimic greenfield runoff up to a maximum of the 1 in 10 year rate and volume.
• Infiltration. Soakage is tested to BRE 365 at the depth of each device, with its base at least 1.0 m above the highest groundwater, which the county prefers to see monitored over a winter.

The 2025 National Standards for sustainable drainage now sit alongside the county's guidance, and our explainer on critical drainage areas covers the stricter rule. For a quick early read on a plot, try our ground conditions and soakaway checker.

Reports for TQ12 sites, from Wharf Road to Bradmore

Which reports a Newton Abbot site needs turns on whether it sits on the valley floor behind the walls or on the hills draining into it:

• Every source together. A flood risk assessment for a Newton Abbot address sets the Lemon, the Teign tide, Aller Brook, the smaller channels and the sewers against each other, and asks what happens if a wall is overtopped.
• For Teignbridge. A flood risk assessment for planning answers Policy EN6, uses the Garden Community Level 2 SFRA that Policy GC5 points to, and meets NPPF policy F4.
• Before you exchange. Off Queen Street, around Osborne Park or near Bradley Lane, a flood risk survey for property purchase looks at the building, its threshold levels and the walls between it and the river.
• Is there a drier site? Most of the sites in the Garden Community SFRA lie mainly in Flood Zone 3, so new homes on them need a sequential and exception test before anything is drawn.
• Off the hills, into the Lemon. A drainage strategy for a site on the slopes above the town shows how runoff is held back before it reaches the culvert and the brooks below.
• Greenfield rates and storage. At Bradmore, Howton Road or Berry Knowles, a surface water drainage strategy sizes storage to Devon's greenfield and long-term storage limits, with the stricter rule where the land drains towards Holbeam.
• Once permission is granted. When a Teignbridge consent comes with a drainage condition, the discharge of drainage conditions supplies the infiltration results, groundwater readings, calculations and maintenance plan the county asks to see.
• Levels behind the walls. Where the Teign walls and the lower Lemon are overtopped in the 1% event, or a breach could flood a plot within minutes, flood modelling gives the design levels the national maps cannot.
• Three warnings inside the outline. Policy EN6 asks for a flood warning and evacuation plan in Flood Zones 2 and 3, tied to the Lemon and Teign warnings that name Queen Street, Wharf Road and Quay Road.
• After a claim. For homes and premises flooded in 2012, 2013 or 2024, a flood risk assessment for insurance gives a broker evidence about the building rather than the postcode.
• Industrial estates by the water. Before buying or lending on a unit at Jetty Marsh, Bradley Lane or the Brunel estate, flood risk due diligence sets out the river, tidal and channel risks to the premises and its access.

Lemon, leat or sewer: who deals with flooding in Newton Abbot

If floodwater threatens anyone in Newton Abbot, call 999; if it has cut the electricity, call 105. Beyond that, the right number turns on the source, whether river, tide, channel or drain:

Our Devon page sets Newton Abbot among the county's towns. Down the coast, Dawlish shares the same district council; to the south, Paignton sits in Torbay; and Exeter is up the A380. Our list of areas we cover has the rest. Kingsteignton, Ogwell, Abbotskerswell and Kingskerswell lie outside the coral line but share the same council and county rules. Our guide to main rivers and ordinary watercourses explains why the Lemon and Whitelake are handled by different bodies.

What Newton Abbot buyers and applicants ask us

Whether the job is a flat near the Lemon, a unit at Jetty Marsh or the drainage for a new street at Bradmore, call 01293 214444 or email enquiries@unda.co.uk. Unda Consulting Limited's chartered consultants will explain what the site calls for. No report leaves without a senior consultant's check and sign-off.