About Castle Preservation Services
For nearly four decades, Castle Preservation Services has been West London's trusted name in damp proofing and property preservation. Our mission is simple: to protect your home with expert solutions, honest advice, and guaranteed workmanship that stands the test of time.
Our History
From humble beginnings to West London's trusted damp proofing specialists
Castle Preservation Services was founded in 1985 by Simon Cosgrove with a clear vision: to provide West London homeowners with reliable, professional damp proofing and property preservation services they could trust. Starting as a one-man operation, Simon built his reputation on honest assessments, quality workmanship, and standing behind his work with comprehensive guarantees.
Over the past nearly four decades, we have grown from serving just Feltham and its immediate neighbours to covering a 10-mile radius throughout West London and North Surrey. Despite this growth, we have never lost sight of the values that made us successful: personal service, expert diagnosis, and genuine care for every property we work on.
Today, Castle Preservation Services remains a family-owned business, maintaining the same commitment to excellence that Simon established nearly 40 years ago. Every survey, every treatment, and every repair is carried out with the attention to detail and professional pride that our customers have come to expect.
Nearly 40 Years of Excellence
Protecting West London homes since 1985
Company Founded
Simon Cosgrove establishes Castle Preservation Services in Feltham, bringing professional damp proofing expertise to West London homeowners.
Building Reputation
Through quality workmanship and honest service, Castle Preservation becomes the trusted choice for damp and timber treatment across the local area.
Expanded Services
We expand our services to include comprehensive basement waterproofing and structural tanking, helping homeowners transform unusable cellars into valuable living spaces.
Nearly 40 Years Strong
With nearly four decades of experience, Castle Preservation Services continues to protect West London properties with the same dedication to quality and customer care that defined us from day one.
Why Choose Castle Preservation Services?
Eight compelling reasons why West London homeowners trust us with their properties
Nearly 40 Years of Expertise
Since 1985, we have diagnosed and treated thousands of damp and timber problems across West London. This extensive experience means we have seen every type of issue and know exactly how to resolve it effectively and efficiently. Our expertise spans Victorian terraces, Edwardian semis, post-war properties, and modern builds.
Industry-Leading 25-Year Guarantees
We stand behind our work with comprehensive 25-year written guarantees on damp proofing and timber treatments. These guarantees are transferable to new owners, adding value to your property and providing peace of mind for decades to come.
Honest, Pressure-Free Assessments
We tell you what you need to know, not what you want to hear. Our surveys identify the true cause of your damp problems, and we only recommend treatments that are genuinely necessary. No scare tactics, no unnecessary work—just honest professional advice.
Clean, Tidy, Professional Service
We treat your home with respect. Our team protects floors and furnishings, minimises dust and disruption, and leaves every property clean and tidy after completing work. We understand that having work done in your home can be stressful, so we do everything possible to make the process as smooth as possible.
Direct Communication with the Owner
When you contact Castle Preservation, you speak directly with Simon Cosgrove—the owner and principal surveyor. No call centres, no high-pressure salespeople, no subcontractors you have never met. This direct relationship ensures clear communication and accountability throughout your project.
True Local Knowledge
Based in Feltham and serving West London for nearly 40 years, we understand the specific challenges facing properties in this area. From the clay soils that contribute to damp problems to the building styles common in each neighbourhood, our local expertise informs every diagnosis and recommendation.
Family Business Values
As a family-owned and operated business, we build relationships, not just customer lists. Many of our clients have used us multiple times and recommended us to friends, family, and neighbours. This reputation is our most valuable asset, and we protect it by treating every customer the way we would want to be treated.
Transparent, Fair Pricing
We provide detailed written quotations that clearly explain what work is needed and what it will cost. There are no hidden charges or surprise extras. Our prices are competitive and fair, reflecting the quality of materials and workmanship you receive.
Our Commitment to You
When you choose Castle Preservation Services, you are choosing a company that puts your interests first. Here is what you can expect from us.
We will always provide honest assessments, even if that means telling you that treatment is not necessary.
We will explain our findings and recommendations in plain English, without jargon or technical confusion.
We will provide detailed written quotations with no hidden costs or surprise charges.
We will arrive on time and complete work within agreed timeframes, keeping you informed of any changes.
We will treat your property with respect, protecting floors, furnishings, and fixtures throughout our work.
We will leave your property clean and tidy after completing any job, large or small.
We will stand behind our work with comprehensive written guarantees that mean something.
We will be available to answer questions and address any concerns, both during and after work is completed.
“Our reputation is built on keeping these promises, one customer at a time.”
— Simon Cosgrove, Founder
Meet Simon Cosgrove
The expert behind Castle Preservation Services
Simon Cosgrove
Founder & Principal Surveyor
Simon Cosgrove founded Castle Preservation Services in 1985 with a simple philosophy: provide homeowners with the same quality of service and honest advice he would expect himself. Nearly four decades later, that philosophy remains at the heart of everything we do.
With almost 40 years of hands-on experience diagnosing and treating damp, timber decay, and waterproofing issues, Simon has developed an encyclopaedic knowledge of property preservation. He has seen every type of damp problem imaginable and knows exactly how to resolve each one effectively and economically.
Simon personally surveys every property and oversees all work carried out by Castle Preservation Services. This hands-on approach ensures consistent quality and allows him to build genuine relationships with customers. Many clients have used our services multiple times over the years and recommended us to friends and family.
When you contact Castle Preservation, you speak directly with Simon—no salespeople, no call centres. This direct communication ensures you receive expert advice from the moment you enquire.
Ready to Discuss Your Property?
Contact Simon directly for honest advice and a free, no-obligation survey. Whether you're concerned about damp, timber decay, or waterproofing, we're here to help.