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Level 3 survey case study

Basement conversion flat with hidden damp and drainage issues.

Our Level 3 Building Survey uncovered significant hidden defects — damp and drainage issues, poor quality construction in the conversion and ventilation problems — helping the buyer renegotiate the price and plan essential remedial works.

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Regulated by RICSRegulated by RICSProfessional standards you can rely on 10,000+ surveysCompleted to RICS standards £2m PI coverProfessional indemnity insurance included Rated Excellent4.9 out of 5 from 270+ Trustindex reviews

Overview

Modern and well finished. Not what it seemed.

The property is a basement conversion flat within a period terraced house. Although the flat appeared modern and well finished, the buyer instructed a Level 3 Building Survey to understand the true condition before committing.

  • Major defects uncovered before legal completion
  • Damp and drainage risks identified, hidden below ground level
  • Complete clarity and confidence before exchange
Newly finished open-plan living room, kitchen and staircase in a basement flat
Period terraced houses with bay windows
Fig. 1 A basement conversion flat within a period terraced house, Lewisham SE4.

Key findings

Five issues the viewing didn’t show.

The survey revealed a number of significant issues that were not visible during the viewing, particularly around dampness, drainage and the quality of the conversion works.

  1. Finding 01

    Damp and moisture

    Significant damp and moisture issues within the basement areas, with rising damp and moisture penetration found to the walls and floor.

    Damp staining and salt damage low on a basement wall
  2. Finding 02

    Poor conversion works

    Poor quality workmanship in the basement conversion, with inadequate detailing and finishes in several areas.

    Unfinished room with exposed plaster and loose boards
  3. Finding 03

    Ventilation issues

    Inadequate ventilation and evidence of condensation, leading to mould risk and poor air quality.

    Black mould spreading around a window and wall
  4. Finding 04

    Drainage and waterproofing

    Drainage arrangements and waterproofing to below ground areas are a concern and require attention.

    Exposed drainage pipework in a below-ground area
  5. Finding 05

    Further investigations

    Further investigative works and repairs required, with additional specialist assessment recommended to determine the full extent of remedial works.

    Floor opened up to expose timber joists

Outcome

£22,000Price reduction achieved

Armed with the findings, the buyer successfully renegotiated the price by £22,000 to reflect the cost of necessary repairs and improvements.

Without the survey, these hidden issues would likely have remained undiscovered until costly problems occurred.

“The Level 3 survey revealed issues we’d never have found ourselves. It gave us the confidence to renegotiate and avoid major future costs.”

Homebuyer, Lewisham SE4

Don’t miss what
others can’t see.

A Level 3 Building Survey gives you the detail you need to protect your investment.

Get my survey & price Call 0330 043 4650
  • 4.9 out of 5 from 270+ reviews
  • Regulated by RICS
  • 10,000+ surveys