Doncaster Flood Risk and Damp Homes: Mould in Rentals After Water Damage

Doncaster presents an odd pairing. It is the driest of our Yorkshire cities, with 582 mm of rain a year at the nearest Met Office station, yet 9.1% of its properties sit at medium or high risk of flooding from rivers and the sea, nearly five times England's 1.9%. The water that damages homes here mostly arrives from rivers and low-lying land, not from the sky overhead, and that changes how a landlord should think about damp.

Why river flooding is a damp problem long after the flood

The flooding that struck villages such as Fishlake in November 2019 showed how long a house can stay affected. Floodwater soaks floors, plaster and the base of walls, and a property that looks dry on the surface can keep releasing moisture for weeks. Mould then appears behind furniture, inside cupboards and on lower walls. If a rental has been flooded, or sits in a mapped flood zone, the working assumption should be that damp is a recurring risk, not a one-off.

A checklist for a flood-affected rental

• Remove soaked carpets, underlay, plasterboard and insulation promptly.
• Dry the structure with ventilation and dehumidification, and record moisture readings until they settle.
• Have electrics and heating checked by a qualified person before the tenant returns.
• Delay replastering and redecorating until the walls are dry, and avoid sealing them with impermeable coatings.
• Keep a dated record of every step; it is your evidence of a prompt, proportionate response.

Beyond floods: colliery terraces and low heating costs

Away from flood zones, the usual suspects apply. The borough has Victorian terraces and extensive housing from former colliery communities, and ex-colliery stock without modern insulation keeps fabric-related damp among the most common complaints in the private rented sector. Only 0.8% of households lack central heating, against 1.5% nationally, so a missing system is an unlikely cause; insulation, ventilation and how affordable the heating is to run are the more probable factors.

Doncaster in numbers

• About 133,000 households. Private renting: 19.4% (England 20.5%). Social renting: 17.0% (England 17.1%).
• Terraced homes: 21.1% (England 23.0%). Flats: just 8.0% (England 21.4%), so houses dominate.
• Flood risk: 9.1% of properties at medium or high risk from rivers and the sea (England 1.9%) and 4.2% from surface water (England 5.9%).
• Rainfall: 582 mm a year at Finningley, six miles away. Overcrowding: 2.4% (England 4.4%).

These are local authority figures from the 2021 Census, the Environment Agency and the Met Office.

Legal duties in short

Private landlords must keep a home fit for human habitation and in repair, and the council can act under the Housing Act 2004. Awaab's Law applies to social landlords only for now; an extension to private tenancies is provided for by the Renters' Rights Act 2025, the consultation closes on 18 December 2026 and there is no confirmed start date. Our Awaab's Law page for private landlords explains the proposals, and you can compare damp and mould specialists covering Doncaster on MouldPros.