House Survey Guide for London Buyers: Level 1, 2, 3 and Specialist Surveys

RICS (Royal Institution of Chartered Surveyors) surveying firms offer three standard survey levels:

**Level 1 — Condition Report:** The most basic survey. Uses a traffic-light rating system for the main elements. Does not include advice on what to do about problems, cost estimates, or detailed inspection of roof spaces or under-floor voids. Suitable only for new-build properties or properties in excellent condition — not recommended for any Victorian or Edwardian London property.

**Level 2 — HomeBuyer Report:** A more detailed visual inspection of the property. Identifies significant issues and gives an opinion on whether specialist advice is needed. Does not always include a valuation (Level 2 with or without valuation are available). The most common survey type for typical London houses and flats.

**Key limitation of Level 2:** It is a visual inspection — the surveyor does not lift floorboards, inspect within cavities, or investigate behind wall finishes. Hidden defects (burst pipes, subterranean drainage issues, hidden structural movement) may not be identified.

**Level 3 — Building Survey (formerly Full Structural Survey):** The most comprehensive RICS survey. Includes an in-depth inspection, detailed analysis of defects found, advice on repair options and urgency, and (usually) indicative cost implications. The surveyor inspects roof spaces and under-floor voids where accessible. Required documentation (previous planning consents, warranties, etc.) is flagged where absent.

• **Level 3 is recommended for:**
• •Any property over approximately 50 years old (virtually all pre-1975 London properties)
• •Properties where renovation, extension, or structural alteration is planned
• •Properties where visible signs of movement, damp, or structural concern are present
• •Properties over approximately £750,000 where the financial exposure is high
• •Non-standard construction properties

**RICS Level 3 cost:** Typically £800–£2,000+ in London depending on property size, age, and location.

For London Victorian and Edwardian properties, a RICS survey often identifies areas where specialist surveys are recommended. Common specialist surveys:

**Structural engineer's report:** Recommended where the RICS survey identifies signs of structural movement (cracking patterns, lintel failure, settlement), where the chimney stack condition is uncertain, or where planned works involve structural alteration. A structural engineer's assessment of a specific defect or concern typically costs £500–£1,500.

**Independent damp survey:** If the RICS survey flags damp, commission an independent damp survey from a specialist who is not affiliated with a damp-proofing contractor (PCA-accredited). Many 'damp surveys' offered free by treatment companies result in unnecessary chemical injection treatments — independent surveys provide objective diagnosis. See the damp and condensation guide.

**Drainage CCTV survey:** Highly recommended for all London Victorian properties. Victorian clay drainage systems are at or near the end of their design life. Tree root ingress, joint displacement, collapse, and bellied pipes are common. A CCTV drain survey (£200–£500) identifies the condition of the drains before purchase — avoiding a potentially very expensive discovery after completion. Building Control will inspect and approve drainage as part of any extension or loft conversion project.

**Asbestos survey:** For London properties built before 2000 (particularly those with 1960s–1990s elements — loft insulation, floor tiles, textured coatings, soffit boards, boiler flue/pipe insulation), an asbestos survey or management survey is advisable before any renovation work begins. Asbestos survey: £200–£500. Asbestos removal where found: £500–£5,000+ depending on the material and extent.

**Electrical installation condition report (EICR):** An EICR is a formal inspection of the existing electrical installation. For older London properties with original wiring, the cost of rewiring (£5,000–£15,000 for a full rewire in a London terrace) should be factored into the purchase decision if the installation is in poor condition. An EICR is not typically part of a RICS survey.

**Japanese knotweed survey:** Japanese knotweed is present in a significant proportion of London properties, particularly those near railway lines, rivers, and brownfield land. It is not identified in standard surveys — a specialist survey is required if suspected. Lenders' attitudes to properties with Japanese knotweed have become stricter in recent years.

Before commissioning a survey, a buyer can identify properties with significant risk at the viewing stage:

• **Cracking patterns:**
• •Hairline cracks in plaster: usually settlement movement — not concerning
• •Diagonal step cracks in brickwork externally: potentially subsidence or differential settlement — requires investigation
• •Horizontal cracks at lintel level above windows or doors: lintel failure — structural concern
• •Vertical cracks at corners or junctions: differential movement — potentially serious

• **Signs of damp:**
• •Efflorescence (white crystalline deposits on brickwork)
• •Staining on ceilings below bathrooms or roof valleys
• •Musty smell in ground floor rooms
• •Blown plaster or paint at low level on external walls (often misdiagnosed as rising damp — more frequently penetrating damp or condensation)

• **Roof condition:**
• •Missing or slipped slates visible from the street or garden
• •Vegetation growth on the roof (indicates long-standing damp)
• •Condition of flashing around chimney stacks, dormers, and flat roof sections

• **Party wall issues:**
• •Evidence of recent works next door (scaffolding marks, new extensions visible from the garden)
• •Gaps or cracks at the party wall junction

• **Planning and building regulations compliance:**
• •Evidence of extensions, loft conversions, or structural alterations without the expected planning permissions and Building Regulations completion certificates — these are the purchaser's responsibility to regularise after completion.