Flood Risk Assessment in Leamington Spa

During Storm Henk in January 2024, the River Leam at the Princes Drive Weir gauge reached a flow with roughly a 1-in-25-year return period, and six Environment Agency flood warnings stayed active across Leamington Spa, Warwick and Kenilworth as the water rose. It was the clearest recent reminder that a town built around a genteel Regency river can turn serious within hours: on an ordinary day the Leam sits quietly below Jephson Gardens and the Royal Pump Rooms; after a big enough storm on its Warwickshire catchment, the same water can be lapping at Mill Gardens, Riverside and Dormer Place.

Unda prepares flood risk assessments in Leamington Spa for planning, property purchase, mortgage and insurance, and BREEAM, alongside sequential and exception tests and surface-water drainage strategies. We read the Leam's flow record, the town's surface-water history and the planning policy that Warwickshire County Council and Warwick District Council apply, so a report reflects how flood risk actually behaves here rather than a generic national picture.

If you need a quote or want to talk a Leamington Spa site through, contact one of our experienced flood risk consultants on 01293 214444 or at enquiries@unda.co.uk, and we reply within 60 minutes.

During Storm Henk in January 2024, the River Leam at Princes Drive Weir reached a flow with roughly a 1-in-25-year return period, and six Environment Agency flood warnings stayed active across Leamington Spa, Warwick and Kenilworth. It is proof that flood risk on the Leam is a live, current issue, not a historic one.

• Dominant risk: the River Leam through the town centre, though surface water has been the more frequent recorded cause of flooded homes in recent years.
• Lead Local Flood Authority: Warwickshire County Council. Planning authority: Warwick District Council.
• Flood Zone 3 corridor: Mill Gardens, the Royal Pump Rooms, Pump Room Gardens, Riverside, Dormer Place and Princes Drive, following the Leam through the town centre.
• Sewerage undertaker: Severn Trent Water, responsible for sewer flooding across almost all of Warwickshire.
• Recent event: a June 2023 storm flooded 12 homes on Shuckburgh Grove from surface water alone, with no watercourse anywhere near the site.

Check flood risk anywhere in Leamington Spa

Enter a postcode below to see the Environment Agency's modelled flood risk for any address in or around Leamington Spa: rivers and the sea, surface water, reservoirs and the planning flood zones, with a climate change outlook to 2125. Warwick district is outlined in coral so you can see the town in its wider administrative context. It is an indicative first pass, not a substitute for a site-specific flood risk assessment in Leamington Spa.

Flood risk in Leamington Spa: the River Leam, its weirs and the town's surface water

The River Leam runs directly through the middle of Leamington Spa, past Mill Gardens, the Royal Pump Rooms, Pump Room Gardens and Jephson Gardens, before curving east past Newbold Comyn on its way to join the Warwickshire Avon near Emscote. The Environment Agency's flood warning areas for the town mark out a Flood Zone 3 corridor that follows the river for almost its whole length through Leamington Spa, covering Mill Gardens, the Pump Rooms and Dormer Place on one side of the centre and Gulliman's Way, Leam Terrace, Bath Street, Euston Place and Princes Drive on the other.

Fluvial risk is not the only story. In June 2023, a short, intense thunderstorm over Shuckburgh Grove overwhelmed the highway drainage on Pound Lane and flooded 12 homes. It was a site with no watercourse anywhere nearby, investigated by Warwickshire County Council under its duty as Lead Local Flood Authority. It is a useful local lesson: a site can sit well clear of the Leam's floodplain and still need a flood risk assessment in Leamington Spa, because surface water is assessed as its own source, independently of the river.

A history of flooding in Leamington Spa

Storm Henk brought the most recent serious river flooding to the Leam. Over 2–3 January 2024, the gauge at Princes Drive Weir recorded a flow with roughly a 1-in-25-year return period, and the Environment Agency kept six flood warnings live across Leamington Spa, Warwick and Kenilworth while the river stayed high, including the target areas covering Mill Gardens, the Pump Rooms, Dormer Place and Princes Drive.

Eighteen months earlier, on 11 June 2023, a localised storm dropped around 29mm of rain in under two hours over Shuckburgh Grove, a residential street with no watercourse nearby. Warwickshire County Council's Section 19 investigation found that surface water running off Pound Lane overwhelmed the highway drainage and entered 12 homes, with five further flood reports recorded on the same stretch back in June 2005 and one more in August 1999, evidence of a repeat problem rather than a one-off.

Longer-standing local record also points to the River Leam itself flooding badly within living memory, with Pump Room Gardens the part of town most often affected: local accounts describe serious flooding there in 1998, when Jephson Gardens was also badly affected, and again during the widespread summer floods that hit much of the Midlands in 2007. No published property count exists specifically for Leamington Spa for either year, so we treat them as general historical context rather than a precise figure.

• 2–3 January 2024, Storm Henk: the River Leam at Princes Drive Weir reached roughly a 1-in-25-year flow; six Environment Agency flood warnings stayed active across Leamington Spa, Warwick and Kenilworth.
• 11 June 2023, Shuckburgh Grove: a localised storm overwhelmed highway drainage on Pound Lane, flooding 12 homes with no watercourse involved.
• June 2005 and August 1999, the same stretch: five and one flood reports respectively near Shuckburgh Grove and Loxley Way, evidence of a repeat surface-water problem long before 2023.
• 1998 and 2007, the River Leam: local record points to serious flooding around Pump Room Gardens and Jephson Gardens in both years, though no verified property count exists specifically for the town.

Planning policy and your flood authorities in Leamington Spa

Two different authorities share responsibility for a flood risk assessment in Leamington Spa. Warwickshire County Council is the Lead Local Flood Authority, responsible for surface water, groundwater and ordinary watercourses and a statutory consultee on drainage for major applications. Warwick District Council is the Local Planning Authority that decides the application itself, working to its adopted Local Plan and, for the River Leam and other main rivers, alongside the Environment Agency.

Warwick District's Local Plan 2011–2029, adopted in September 2017, carries four flood and water policies that a development in Leamington Spa has to satisfy: Policy FW1 on reducing flood risk, Policy FW2 on sustainable drainage, and Policies FW3 and FW4 on water efficiency and supply. The council's Level 1 Strategic Flood Risk Assessment, published in April 2013, is the background evidence behind those policies and behind the flood zone pattern along the Leam corridor. It predates both Storm Henk and the Shuckburgh Grove flooding, so we always check a site against the live Environment Agency Flood Map for Planning rather than relying on the 2013 document's boundaries alone.

The Royal Leamington Spa Neighbourhood Plan, adopted in May 2021 after a referendum vote of 88.3% in favour, adds a further local layer. It protects the River Leam corridor's green infrastructure and flood-management function, and supports sustainable drainage and de-culverting on sites that come forward for development. Warwickshire County Council's Local Flood Risk Management Strategy and Surface Water Management Plan set out the wider county picture and the thresholds that trigger one of its formal Section 19 investigations (typically five or more properties flooded internally, or repeat flooding from the same source), such as the one carried out after the Shuckburgh Grove flooding.

• Policy FW1: reducing flood risk. The core test a Leamington Spa scheme must satisfy before permission is granted.
• Policy FW2: sustainable drainage. Requires SuDS to be considered from the outset, not added on as an afterthought.
• Policies FW3 and FW4: water efficiency and water supply, considered alongside flood risk in the same Local Plan chapter.
• Royal Leamington Spa Neighbourhood Plan (2021): protects the Leam corridor's flood-management role and supports SuDS and de-culverting.

Development and flood risk assessment in Leamington Spa

Leamington Spa's Georgian and Regency core, the terraces around the Parade, Jephson Gardens and the Royal Pump Rooms, sits largely within a conservation area, which puts real constraints on how a flood-resilience retrofit or a new drainage connection can be designed on a listed or characterful frontage. Schemes here often need a flood risk assessment in Leamington Spa that works with the heritage context rather than assuming a plain modern rebuild.

Sites closer to the river, around Mill Gardens, Riverside, Princes Drive and the fringe of Newbold Comyn, sit inside Flood Zone 2 or 3, so alongside the flood risk assessment they typically need a Sequential Test to show no reasonably available lower-risk site exists, and sometimes an Exception Test where the wider planning benefits justify building there anyway.

Away from the river corridor, growth in Leamington Spa is shaped by the adopted Local Plan's focus on the built-up Leamington, Warwick and Whitnash area, and by the emerging South Warwickshire Local Plan that Warwick District Council and Stratford-on-Avon District Council are preparing jointly for the district's next stage of housing and employment allocations. A proposed strategic Green Belt release north of Milverton, on the edge of the town, was removed from the 2017 Local Plan at examination, so any renewed interest in that land would need to come through the new joint plan rather than the current one. Whichever route a scheme takes, drainage capacity and the SuDS hierarchy are live constraints in a town where surface water has already flooded homes with no river in sight.

How Unda helps with flood risk assessment in Leamington Spa

We have prepared flood risk assessments and drainage strategies for sites across Warwickshire, and we bring that same approach to a Leamington Spa site: reading the Leam's flow record and flood warning history, the Warwick District Local Plan policies and the Warwickshire County Council guidance a Lead Local Flood Authority applies, then producing a report that a case officer, the Environment Agency and a lender or insurer can all rely on. A Senior Flood Risk Consultant signs off every report, and we reply to every quote request within 60 minutes.

Flood risk assessments for every situation in Leamington Spa

People need a flood risk assessment in Leamington Spa for several different reasons, and we prepare the right report for each of them. A planning application in Flood Zone 2 or 3, on a site of a hectare or more, or anywhere the Flood Map for Planning shows surface water risk, generally needs a flood risk assessment for planning. A property flagged during conveyancing needs a flood risk survey for property purchase, going beyond the screening report a solicitor or lender has already seen. Where an insurer or broker has raised concerns, or premiums have risen sharply, we prepare a flood risk assessment for insurance, and where a scheme is targeting certification we prepare a flood risk assessment for BREEAM, structured around the Pol 03 criteria from the outset.

A flood risk assessment, a sequential or exception test and a drainage strategy are three different reports. They travel together in a planning submission, but they answer different questions: is the site safe, should the development be here, and where does the surface water go. For a Leamington Spa site in Flood Zone 2 or 3 we prepare the sequential and exception test report alongside the assessment, and for surface water we design a surface-water drainage strategy (SuDS), then take it through to a discharge of drainage conditions or a preliminary drainage design as a scheme progresses. Where flood levels along the Leam need more precision than the national mapping gives, our flood modelling team can model the watercourse directly, and where a site's geology raises the water table, a groundwater flood risk assessment looks at that source specifically rather than folding it into a generic surface-water figure. General guidance on how national policy applies is set out in our NPPF flood risk assessment guidance.

If you are weighing up drainage options for a Leamington Spa site, Unda's free drainage calculators and BRE 365 infiltration rate calculator give a fast first read before a full strategy is commissioned, and our geology and ground conditions checker shows whether the river-terrace deposits beneath a site are likely to support a soakaway. Before you check a specific address, our Flood Risk Map and Live River Levels Map both give a useful first read on how the Leam and the wider Warwickshire catchment are behaving right now. You can find guides to Unda's other local flood risk assessment coverage, including the wider flood risk assessment in Warwickshire and neighbouring flood risk assessment in Coventry guides, or read more about our full flood risk assessment services and the flood risk consultants who carry them out. You can also read more about Unda.

Local flood risk management and emergency contacts in Leamington Spa

If flooding is affecting a Leamington Spa property now, several different organisations share responsibility depending on the source. Knowing which one to call saves time in an emergency.

• In a flood emergency, call 999. If there is a risk to life, always call the emergency services first.
• For power cuts caused by flooding, call 105 to reach your electricity network operator free of charge.
• To get free flood warnings for the River Leam, register with the Environment Agency's Floodline service on 0345 988 1188.
• To report flooding on the highway or from a blocked drain, contact Warwickshire County Council as the Lead Local Flood Authority.

Flood risk assessment in Leamington Spa: frequently asked questions