At P Johnston Construction, we provide a range of services. Select a service from the menu on the right-hand side to view details on what we offer. Based in Peterborough, we are a domestic and commercial building company, specialising in new builds, loft conversions and extensions. Our builders are fully City & Guilds and NVQ qualified, with over 30 years experience. All of our work is fully managed, from the beginning of the project until completion.