RICS Level 3 Building Survey in Dunster

Dunster is a designated Conservation Area with an extraordinary concentration of historic buildings, including two Grade I listed structures and over 200 Grade II listed buildings. Properties along the medieval main street and around the Yarn Market date from the 17th to 19th centuries, featuring traditional construction methods that differ significantly from modern buildings. These older properties often have unique structural characteristics that require expert assessment, including timber-framed walls, original stone masonry, and traditional roofing materials.

The geology of the Dunster area presents specific considerations for property purchasers. Situated at the northern end of the Avill valley, the village sits on a base that includes Hangman Grits and surrounding clay-rich soils. This combination can create shrink-swell subsidence risks during periods of drought or heavy rainfall. Our surveyors understand these local ground conditions and will specifically assess foundations, drainage, and any signs of movement that may be related to soil conditions.

Coastal exposure also affects properties in Dunster, particularly those near the beach and low-lying areas around Lower Marsh. Salt air can accelerate deterioration of building materials, and properties in flood-risk zones require particular attention to damp-proofing and structural integrity. Our Level 3 Survey examines all these area-specific factors, giving you confidence in your property investment.

Dunster's position on the Somerset coast means that properties in certain locations face specific environmental risks that our surveyors assess carefully. The area between The Warren and Sea Lane End, including the Dunster Beach Chalets, is designated as a flood warning area due to coastal flooding risks from strong winds and spring tides. Properties in Lower Marsh and near The Old Manor have historically been affected by flood waters. Our survey includes assessment of flood risk and recommendations for appropriate investigations where necessary.

• Medieval & period property specialists
• Assessment of traditional construction methods
• Flood risk evaluation for coastal properties
• Foundation and subsidence analysis

Properties in Dunster showcase a remarkable variety of traditional building techniques that have evolved over centuries. The predominant building materials include local red sandstone, particularly prominent around Dunster Castle which sits on an outcrop of Hangman Grits, along with traditional renders and lime-based mortars. Many medieval properties along the main street feature heavy timber framing using oak and elm, with structural trusses that create the distinctive character of the village. Understanding these traditional methods is essential for accurate assessment, as modern building standards cannot be applied to historic construction.

Thatched roofing remains common throughout Dunster, with properties featuring either reed or straw thatch that requires specific maintenance expertise. These traditional roofs can last for decades when properly maintained but hide potential defects in the supporting rafters and purlins that only experienced surveyors can identify. Our inspectors examine thatched roofs carefully, looking for signs of deterioration, water penetration, and timber decay that may not be visible from ground level.

The windows and doors in Dunster's historic properties often feature unglazed wooden frames or original horned sash windows that represent important historic character. These traditional elements require different assessment criteria than modern double-glazed units, and our surveyors understand how to evaluate their condition and thermal performance without damaging their historic integrity. We document any rot, decay, or hardware issues that may require specialist restoration.

• Red sandstone and local stone construction
• Traditional timber framing (oak/elm)
• Thatched and slate roofing
• Lime mortars and traditional renders

Properties in Dunster face several area-specific challenges that our surveyors are trained to identify. Dampness is one of the most frequently encountered issues in period properties, particularly those with solid walls rather than modern cavity wall construction. Traditional renders and plaster can trap moisture, especially where original ventilation has been reduced by modern energy efficiency improvements. Our surveyors look for tell-tale signs including discoloured patches, salt efflorescence on walls, and deteriorated plaster. Properties with solid stone walls are particularly susceptible to penetrating damp, especially where pointing has deteriorated over centuries of exposure to Somerset's weather.

Structural movement is another concern in older Dunster buildings. Properties constructed using traditional methods may show signs of historic movement, and our surveyors distinguish between benign settlement cracks and more serious issues requiring immediate attention. We assess the condition of chimney stacks, which are particularly vulnerable in older properties and can show signs of tilting or mortar deterioration. The clay-rich soils in parts of the Dunster area can cause foundation movement during drought conditions, and our surveyors specifically look for evidence of this type of subsidence.

Roof conditions demand careful inspection in Dunster, where thatched properties remain common alongside traditional slate and tile coverings. Thatched roofs have specific maintenance requirements and can harbour hidden rot in the supporting timbers. Our surveyors access roof spaces where safe to do so and examine coverings for signs of deterioration, missing tiles, or damaged flashing around junctions and penetrations. We also assess the condition of valley gutters, which are common in older properties and frequently become sites of water penetration and decay.

Drainage issues are particularly relevant in Dunster due to the local geology and flood risk. Properties in lower-lying areas may be affected by poor surface water drainage, and defective drains can cause subsidence or damp problems. Our survey includes inspection of gutters, downpipes, and where accessible, underground drainage systems. We look for signs of leaking or blocked drains that could be causing foundation movement or dampness in the property structure.

• Damp and condensation issues
• Structural movement and cracks
• Roof condition and thatch deterioration
• Chimney stack stability
• Drainage and gutter problems
• Timber decay and pest damage