RICS Level 3 Building Survey in AB25

AB25 is one of Aberdeen's most historically significant postcodes. Old Aberdeen is a designated conservation area, preserving a streetscape that includes pre-Reformation buildings, the medieval King's College (part of the University of Aberdeen), and St Machar's Cathedral. Many properties in the postcode are listed at Category A or B, and buying a listed building without proper structural due diligence carries substantial financial risk.

The level of planning constraint on properties in conservation areas and listed buildings is considerable. Listed building consent is required for any alteration that affects the character of the building - inside or outside - and works carried out by previous owners without consent can create legal and financial problems for new buyers. Identifying any such works, alongside understanding the structural condition, is exactly what a Level 3 Building Survey delivers.

Prices across AB25 have edged down 1% overall in the last year to an average of £194,360. Detached properties average £309,564, while flats average £114,333 - the flat market in AB25 is significantly influenced by the University of Aberdeen, which falls largely within this postcode. The student and academic rental market creates strong underlying demand for flats, but buyers should note that older granite tenement flats require thorough assessment before purchase.

Pre-1900 properties are common in the Old Aberdeen part of the postcode, particularly around the university campus, King's College, and the cathedral precinct. Properties of this age are built to different standards than modern buildings, using materials and techniques that have their own maintenance requirements and failure modes. Solid granite walls, lime mortar pointing, timber sash windows, and slate roofs all need careful assessment to determine their current condition and any works required.

Aberdeen's oil and gas economy has been a significant driver of the housing market over the last decades, and AB25's property values have been influenced by the ebb and flow of that sector. With prices currently softer than previous peaks, buyers entering the AB25 market should use the survey process to establish accurate condition information - both to inform purchase decisions and to provide a baseline for future maintenance planning.

Timber defects, including wet rot, dry rot, and woodworm, are frequently identified in older Aberdeen properties where ventilation has been inadequate or dampness has gone unaddressed over time. Older properties in AB25 with solid granite walls and traditional timber floors and roof structures are susceptible to these issues. Our inspectors check all accessible timber elements and note any defects found, along with recommendations for investigation or treatment.

The variety of property types in AB25 - from pre-1900 granite buildings in Old Aberdeen to Victorian and Edwardian terraces, inter-war semis, and post-war flats - means our surveyors encounter a broad range of defect types. The most common issues reflect the age and construction characteristics of the area's housing stock.

Dampness is the most frequently reported issue in older AB25 properties. Solid granite walls without a cavity rely entirely on intact mortar and sound external coatings to exclude water. Where pointing has failed - particularly on north-facing elevations that receive less sunlight to dry out - water tracks through the wall over years and causes persistent damp on internal surfaces. Rising damp at ground floor level is also common in older properties where damp-proof courses are absent or have failed.

Timber defects are closely linked to dampness. Wet rot at window sills, fascia boards, and subfloor timbers near areas of moisture ingress is a typical finding in older AB25 buildings. Dry rot is a more serious and aggressive form of fungal decay that can spread through a building even in relatively dry conditions once established. Our inspectors check all accessible timber elements, including the roof structure and floor joists, as part of the Level 3 inspection.

Granite-specific issues include spalling - where the face of granite stones breaks away - and deterioration of the mortar at wall junctions and around window and door openings. Traditional lime mortar is more flexible than modern cement mortar and is the correct repair material for granite buildings, but cement repointing by previous owners can trap moisture within the wall rather than allowing it to evaporate. Our survey identifies any cement repointing and its consequences.

• Failed pointing and penetrating damp in granite external walls
• Rising damp at ground floor level in properties without damp-proof courses
• Wet rot in external joinery, particularly window sills and fascias
• Suspected dry rot in subfloor voids and roof spaces
• Spalling granite and cement repointing over lime mortar
• Worn slate roof coverings and failing leadwork
• Deteriorated timber sash windows - sticking, gaps, and decay
• Chimney stack pointing failure and staining from water ingress
• Energy efficiency concerns in solid-wall granite properties
• Previous unauthorised alterations on listed and conservation area properties