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Business Details
10 Years
experience
Expert Damp & Timber Surveys in London
JPM Independent Surveyors is a specialist firm dedicated to diagnosing damp and timber defects with precision and expertise. As a CSRT Qualified surveyor and member of the Property Care Association (PCA), we provide detailed, easy-to-understand reports for homeowners, landlords, estate agents, and pre-purchase clients. Our services align with industry standards, including the Joint Position Statement on moisture investigation in traditional buildings. We focus on impartial advice, ensuring accurate diagnosis of issues like rising damp, penetrating damp, condensation, and timber decay. Our reports include photographic evidence and tailored recommendations to resolve problems efficiently.

We serve North London, East London, and West Essex, prioritising transparency and avoiding unnecessary remedial work. Our credentials include full insurance, PCA membership, and recognition by Which? Trusted Traders and Trustatrader. We specialise in pre-purchase surveys, sprayed foam evaluations, and structural timber assessments. Our approach combines technical expertise with client-focused communication to deliver cost-effective solutions. By addressing moisture sources and structural risks early, we help clients protect their property investments. Our independence ensures unbiased advice, free from contractor affiliations, giving clients confidence in our findings.
Services
Damp Surveys Timber Decay Assessments Pre-Purchase Surveys Sprayed Foam Evaluations Waterproofing Reports
Details
  • Year established: 2016
Highlights and features
  • We are CSRT Qualified specialists in damp and timber diagnostics.
  • Our PCA membership ensures adherence to industry best practices.
  • We provide independent, unbiased assessments with no contractor ties.
  • Reports include photographic evidence and actionable recommendations.
  • We specialise in surveys for traditional buildings per RICS guidelines.
Associations and certifications
  • Property Care Association (PCA)
  • CSRT Qualified
  • Which? Trusted Traders
  • Trustatrader Approved
What people say
Detailed photographic reports Impartial expert analysis Quick turnaround times Helped secure mortgages Effective damp solutions
Services
Damp Surveys
Our damp surveys identify rising damp, penetrating damp, and condensation issues through thorough inspections. We use moisture meters and visual analysis to diagnose causes, including defective damp-proof courses or poor ventilation. Reports include photographic evidence and remediation strategies to prevent structural damage and health risks from mould.
Timber Decay Assessments
We assess timber for fungal decay and insect infestations like woodworm. Our surveys determine moisture levels, structural risks, and treatment options, such as preservative treatments or timber replacement. Findings are documented with photographs and recommendations to restore structural integrity and prevent further decay.
Pre-Purchase Surveys
Pre-purchase surveys evaluate properties for damp, timber defects, and sprayed foam issues. Our PCA-compliant reports highlight risks affecting value or mortgage eligibility. Clients receive clear guidance on necessary repairs and costs, ensuring informed decisions before completing property transactions.
Sprayed Foam Evaluations
We inspect sprayed foam insulation for installation quality, moisture trapping, and structural risks. Our PCA-protocol surveys identify ventilation issues, timber decay, or condensation risks. Reports assist homeowners with mortgage applications or sales by providing lender-accepted documentation on foam condition and remediation needs.
Waterproofing Reports
Waterproofing surveys address persistent damp by recommending solutions like cavity drainage systems or external groundworks. We assess existing defects, propose cost-effective treatments, and ensure compliance with building regulations to protect properties from future water ingress and structural damage.
People
Jason Mahoney
Proprietor
Jason Mahoney is a CSRT Qualified surveyor with over a decade of experience in damp and timber diagnostics. He specialises in PCA-compliant assessments for residential and traditional buildings, offering impartial advice to resolve moisture and structural issues efficiently.
Questions
What does a damp survey include?
Our damp survey identifies rising damp, penetrating damp, or condensation through moisture testing and visual inspection. The report includes photographs, causes, and remediation advice.
Are your surveys PCA-compliant?
Yes, all surveys follow Property Care Association protocols, including assessments for traditional buildings as per RICS and Historic England guidelines.
Can you assess sprayed foam insulation?
Yes, we evaluate foam installation quality, moisture risks, and structural impacts using PCA inspection protocols. Reports help address mortgage or sale requirements.
Do you offer pre-purchase surveys?
Yes, we provide pre-purchase damp and timber surveys to identify defects affecting property value or mortgage eligibility, with clear remediation cost estimates.
How do you handle timber decay?
We diagnose fungal rot or insect infestations, assess structural risks, and recommend treatments like drying, preservatives, or timber replacement to restore integrity.
What areas do you cover?
We cover North London, East London, and West Essex. Contact us for quotes in other regions.