RICS Level 3 Building Survey in Wonston

Wonston village presents specific challenges that make a Level 3 Survey particularly valuable. The geology in this area combines chalk with clay deposits, creating what is known as a moderate shrink-swell risk. During periods of extreme weather, particularly drought followed by heavy rain, clay soils expand and contract, potentially causing foundation movement. This is especially relevant for properties with shallow foundations or those situated near established trees. Our inspectors are trained to identify the signs of this type of movement, including specific crack patterns and door and window alignment issues.

The housing stock in Wonston reflects its rural Hampshire character. With approximately 55% detached properties, many of substantial size and value, the potential repair costs for structural issues can be significant. Properties built before 1919, which account for around 30% of the housing stock, were typically constructed using solid wall methods with brick, flint, and in some cases timber frames with lime mortar. These traditional construction techniques require specialist understanding, and our surveyors bring this expertise to every inspection in the area.

The village's Conservation Area status means many properties either contribute to or directly form part of the area's historic character. St. Bartholomew's Church and several historic farmhouses and cottages are listed buildings, and many more properties fall within the conservation boundary. When surveying period properties in Wonston, our inspectors pay particular attention to potential issues with historic fabric, including the condition of lime mortars, the integrity of original timber frames, and any alterations that may have been carried out over the years.

Beyond the geological and heritage considerations, Wonston's proximity to the River Dever creates additional assessment requirements. The river, which flows through the parish, contributes to a low to moderate fluvial flood risk in its immediate vicinity. Additionally, areas of surface water flood risk exist along minor watercourses that run through the village. Our surveyors assess flood risk indicators and any evidence of previous flood damage when inspecting properties in affected locations.

• Foundation movement assessment
• Comprehensive roof inspection
• Damp and timber condition analysis
• Conservation area considerations
• Flood risk assessment

Based on our experience surveying properties throughout the Wonston area, several recurring issues warrant particular attention. Damp remains one of the most common findings, particularly in older properties where original damp-proof courses may have failed or been bridged over time. The combination of traditional solid-wall construction and the local climate can create conditions conducive to rising and penetrating damp, especially in properties with inadequate ventilation. Our surveyors use moisture meters and thermal imaging equipment to identify damp issues that may not be visible to the untrained eye.

Timber defects including woodworm and wet rot are frequently identified in Wonston's period properties. These issues often relate to long-term damp problems or inadequate sub-floor ventilation. Our surveyors examine all accessible timber elements, including floor joists, roof trusses, and window frames, assessing both visible surfaces and where possible, probing to determine the extent of any decay. Properties with suspended timber floors in particular require careful assessment of joist ends and bearing points.

Roofing issues are another common finding in this area. Older properties often feature traditional slate or clay tile roofs that have reached or exceeded their expected lifespan. Our inspectors examine roof coverings for slipped tiles, deteriorated leadwork, and failing felt underlays. In some cases, we identify issues with the roof structure itself, including damaged or corroded truss members, inadequate bracing, or signs of previous structural movement.

Given the local geology, we also pay close attention to signs of subsidence or heave. Properties built on clay substrates can experience foundation movement, particularly where trees are present or where drainage is poor. Our surveyors document any cracking, particularly diagonal cracks at corners or stair-step cracks in brickwork, and assess whether movement appears to be ongoing or historic. We examine window and door operation as misalignment can indicate structural movement.

The flood risk from the River Dever and surface water flooding also requires consideration during our surveys. Properties in areas identified as having flood risk may show evidence of previous water ingress, including staining, watermarks, or damaged plasterwork at lower levels. We document any such evidence and provide appropriate recommendations for flood resilience where relevant.

Understanding the construction methods used in Wonston properties helps our surveyors identify potential issues specific to the area. Properties built before 1900, which form a significant portion of the historic core, predominantly used solid wall construction. These walls, typically constructed from local red brick, flint, or a combination of both, were built without cavity spaces and rely on their mass to provide weather resistance and structural integrity.

Lime mortar was the standard bonding material for properties built before the mid-20th century. Unlike modern cement-based mortars, lime mortar allows the building fabric to breathe and accommodates slight movement without cracking. Our surveyors assess the condition of lime mortar Pointing, as deterioration can lead to moisture penetration and accelerated decay of the underlying brick or flint. Repointing with cement mortar on historic properties can cause significant damage by trapping moisture within the wall.

From 1900 onwards, cavity wall construction began to appear in Wonston, though solid wall construction remained common for some time. By the post-war period, cavity wall construction with brick outer leaves and blockwork inner leaves became standard. Many properties from the 1945-1980 period feature this construction method, which generally provides better thermal performance and moisture resistance than solid walls.

The newer developments at The Pastures and Wonston Green represent modern construction methods compliant with current building regulations. These properties typically feature cavity wall construction with insulation, modern roofing systems, and up-to-date damp-proof courses. However, even new builds can contain defects that require identification, and our thorough inspection process ensures all potential issues are highlighted regardless of the property age.

Wonston has seen new development activity in recent years, with two notable developments bringing modern properties to the area. The Pastures, located in the SO21 3LS postcode, offers 2, 3, and 4-bedroom homes by Foreman Homes with prices ranging from £380,000 to £650,000. Wonston Green in SO21 3NA, developed by Bargate Homes, features larger 3, 4, and 5-bedroom houses with prices from £450,000 up to £800,000.

While these new build properties benefit from modern building regulations and often come with builder's warranties, we still recommend a Level 3 Survey. Our inspectors can identify snagging issues, potential defects in construction quality, and any areas where the property deviates from building regulations. New builds can have hidden defects that only become apparent over time, and an early survey provides valuable leverage for addressing issues before completion.

The modern construction methods used in these developments, including cavity wall insulation and contemporary roofing systems, require different assessment approaches compared to traditional properties. Our surveyors understand how to inspect modern construction techniques and can identify issues such as inadequate insulation installation, ventilation problems, or defects in герметизация (sealing) that may not be covered by the builder's warranty.