A mortgage valuation is not a survey. This is the most important thing to understand before buying a property. A valuation tells a lender the property is worth the lending amount; it does not tell you whether there are structural problems, damp, or expensive defects. Commissioning your own survey is the only way to understand what you're buying — and the cost of a survey is trivial compared to the cost of discovering problems after completion.
Since 2021, RICS (Royal Institution of Chartered Surveyors) surveys are classified as Level 1, 2, and 3.
Level 1: Condition Report
The most basic survey. Provides a traffic-light (green/amber/red) condition rating for each main element — roof, walls, windows, floors, drainage, etc. No recommendation on repairs, no cost estimates, no detailed commentary. Suitable only for new-build or very recently renovated properties in excellent condition where you simply want a formal third-party record. Not appropriate for any property with age, wear, or any visible concerns.
Cost: £250–£400.
Level 2: HomeBuyer Report
The mid-tier survey and the most commonly commissioned. Covers the visible and accessible parts of the property, provides condition ratings with written commentary, identifies defects, and flags items needing urgent repair or further investigation. Includes a market valuation and reinstatement cost. Suitable for most conventional, post-1930s properties in reasonable condition.
Limitations: it's a visual survey of accessible areas only. The surveyor won't lift floorboards, move furniture, or inspect under built-in units. For properties with complex histories, suspected structural issues, or significant age, a Level 3 is more appropriate.
Cost: £400–£800, depending on property size and value.
Level 3: Building Survey (Full Structural Survey)
The most comprehensive residential survey. The surveyor inspects every accessible part of the building in detail, tests services where accessible, considers the construction method and materials, assesses structural issues, and provides an extensive written report with repair recommendations and indicative costs. For pre-1930s properties, listed buildings, extended or altered properties, or any property where concerns exist, Level 3 is the appropriate survey.
Cost: £600–£1,500+ depending on property size and complexity.
Specialist Surveys
A full structural survey does not replace specialist surveys for specific known issues. If damp is suspected, a specialist damp survey is appropriate. If structural movement is visible, a structural engineer's report (separate from a surveyor) is needed. Drainage surveys (CCTV drain camera) are valuable for older properties. These specialist surveys typically cost £150–£500 each.