Established in 1976, we have the knowledge and expertise needed to ensure that you receive nothing but the best service. Our reputation has been developed through hard work and reliability which is why many customers in Hampstead Garden Suburb and the North West London area have been using us since we started. Whether you are a private customer looking for a personal service or a landlord or looking for someone to look after your complete heating needs then John Marshall Plumbing & Heating can deliver what you need.