RICS Level 3 Building Survey in Keadby with Althorpe

Keadby with Althorpe properties call for a close eye on movement, because our inspectors know this part of Lincolnshire sits in a clay shrink-swell zone. As the clay-rich ground changes volume, it can push and pull on foundations, leading to subsidence or heave, and that matters even more on the organic soils and peats across this low-lying coastal plain. We look closely at foundations, wall cracking and any other signs of movement. Geoarchaeological surveys in Keadby have also found a repeated sequence of fine buff to pale grey sand, then waterlogged black-brown silty organic sand and peat deposits, which can leave foundations on uncertain ground.

Flooding is the other major issue here. The whole of Althorpe sits in flood zone 2/3a, so the River Trent presents a high risk, and in 2013 around 80 homes in Keadby flooded after a breach in static flood defences, made worse by internal flooding at Keadby Pumping Station. Our surveyors check for old flood damage, damp penetration and the condition of any flood resilience measures. We also look at drainage carefully, since the area relies on a complex pumped system to keep water levels low enough for agriculture.

Period homes dominate much of the stock here, which makes a Level 3 survey a sensible choice. Buildings spanning the 15th century, such as St. Oswald's Church, through to the mid-17th century Old Hall and the Victorian Old Rectory, 1840, mean many residential properties are pre-1900 and need a proper structural review. Local brick, random stone, and Welsh slate or pantile roofs each bring their own familiar defect patterns, and our inspectors recognise them well. There are eight listed buildings in the parish, including the Grade I listed Church of St Oswald and several Grade II listed structures, which says a lot about the area’s historic character.

• Clay shrink-swell subsidence
• River Trent flood risk
• Period property structural issues
• Drainage and damp problems
• Listed building condition
• Surface water flooding

Keadby with Althorpe’s housing tells the story of the place as much as the landscape does. The Old Rectory, 1840, is built in grey brick in Flemish bond with stucco to the basement and a Welsh slate roof, while The Old Hall, from the mid-17th century, uses red brick in English bond with a pantile roof, a familiar sight on older manor houses in North Lincolnshire. St. Oswald's Church, the Grade I listed building dating from 1483, is ashlar stone with a random stone nave, a mix that reflects the local materials used over centuries.

Housing growth in Keadby was strongly influenced by the power station, and houses built for the workforce began to appear from the late 1940s onwards. That means some homes may use non-traditional methods or materials linked to mid-20th century industrial housing. Our surveyors are used to checking these buildings and know they often need more detailed investigation than standard modern houses. The Stainforth and Keadby Canal, opened in 1802 for industrial transport, also shaped how the area developed.

There is still fresh planning activity in the area. Applications have gone in for 28 dwellings at Old Railway Sidings on the A18 from Althorpe to Gunness, and there are proposals for new housing at land rear of Hawthorne Way in Althorpe. New builds like these can raise different structural questions from the traditional stock, and our Level 3 surveys are designed to pick up any issues with newer construction methods or materials.

• Victorian-era brick construction
• Pre-1900 period properties
• Mid-20th century power station housing
• Recent new build developments
• Traditional stone masonry
• Non-traditional construction methods

Eight listed buildings of historic interest sit within the parish of Keadby with Althorpe, including the Grade I listed Church of St Oswald in Althorpe, dating from 1483, and several Grade II listed structures such as The Old Rectory (1840), The Old Hall (mid-17th century), Keadby Lock (1793-1802), and Keadby Bridge (King George V Bridge, opened 1916). Buildings of this age need the level of scrutiny only a Level 3 survey can provide. Ashlar stone, random stone masonry, grey brick in Flemish bond, and red brick in English bond all bring their own defect patterns, and our experienced surveyors know what to look for.

Buying a listed building in Keadby with Althorpe makes a Level 3 Survey essential. These homes often have complicated structural histories, earlier alterations and unusual construction details that need expert review. Our report identifies structural concerns, checks the condition of historic features, and gives guidance on maintenance that keeps the character intact while protecting structural integrity. We also understand the planning controls for listed buildings in North Lincolnshire, including the need for listed building consent for certain works.

The power station has had a clear influence on housing in Keadby, with homes built for the workforce when Keadby 1 commenced work in 1948 and opened in 1952. As a result, some properties may use non-traditional methods or materials associated with mid-20th century industrial housing. Keadby 2, the newer natural gas-fired power station, reached commercial operation in 2023, so the area’s link to energy production continues. Our surveyors are familiar with these properties and know they may need more detailed investigation than standard modern homes.