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Business Details
46 Years
experience
Your Trusted Construction Partner in St Albans
Established in 1980, Castle Builders has consistently delivered top-quality residential building projects across St Albans, North London, and surrounding areas. As a family-run business with over 40 years of experience, we specialise in high-spec extensions, new builds, renovations, and loft conversions. Our commitment to excellence is achieved through collaboration with exceptionally trained and experienced local craftsmen, ensuring superior results for every project. We prioritise open and honest communication throughout the construction process, fostering long-term relationships with clients who often refer us to their networks. Our expertise spans from initial design and planning to final execution, with a focus on innovative, efficient, and contemporary builds.

We take pride in our 400+ completed projects, reflecting our dedication to quality and client satisfaction. By working closely with respected local Chartered Building consultancies, we offer a comprehensive design, planning, and building service from concept to completion. Our team remains deeply invested in every project, as evidenced by testimonials highlighting our collaborative approach and attention to detail. Castle Builders is proud to sponsor local youth football teams, reinforcing our commitment to the community. With decades of combined experience, our directors lead a team that consistently exceeds client expectations through meticulous planning and execution.
Services
Hi-Spec Extensions Loft Conversions New Builds Refurbishments Design & Build
Details
  • Year established: 1980
Highlights and features
  • We have over 40 years of experience in residential construction.
  • Our family-run business prioritises client collaboration and transparency.
  • We work with highly trained local craftsmen for superior results.
  • 400+ completed projects demonstrate our consistent delivery.
  • Direct involvement of directors in every project ensures quality control.
What people say
Excellent quality Joy to work with Imaginative solutions On time, on budget Unreserved recommendation
Services
Hi-Spec Extensions
We deliver premium single and two-storey extensions, including side, rear, and wrap-around designs. Our expertise includes installing bi-fold doors and underfloor heating systems, with full project management from design to completion. Clients benefit from seamless integration of modern features while maintaining structural integrity. Our process ensures minimal disruption to homeowners during construction.
Loft Conversions
Specialising in complete loft conversions, we handle structural steelwork, carpentry, electrical installations, and high-quality finishes. Each project is customised to create functional living spaces tailored to client needs. Our end-to-end service includes planning applications and building regulation approvals, ensuring legal compliance and safety standards are met throughout the process.
New Builds
We construct bespoke residential properties using premium materials and modern techniques. Collaborating with chartered building consultancies, we manage architectural design, planning permissions, and construction phases. Our focus on energy efficiency and contemporary design ensures homes meet both aesthetic and practical requirements for modern living.
Refurbishments
Our team undertakes full interior refurbishments and structural alterations, including creating open-plan spaces and installing steelwork. We offer complete decoration services to finish projects to the highest standards. Whether adding bedrooms or transforming layouts, we ensure minimal disruption while enhancing property value and functionality.
Design & Build
We provide integrated architectural design and construction services, managing projects from concept to completion. This includes feasibility studies, planning applications, and building regulations approval. Our collaborative approach with clients and architects ensures efficient delivery of high-specification residential projects that meet exact specifications and timelines.
People
Raymond Scullion
Director
With over 40 years in the construction industry, Raymond leads Castle Builders' commitment to quality. He oversees project execution and client collaboration, ensuring adherence to high standards across all developments in St Albans and surrounding areas.
Luke Scullion
Director
Luke manages day-to-day operations and project coordination, leveraging his extensive experience in residential construction. He works closely with clients and contractors to maintain Castle Builders' reputation for excellence in high-spec extensions and new builds.
Questions
What areas do Castle Builders operate in?
We primarily serve St Albans, North London, and surrounding areas including Harpenden and the Isle of Wight.
What types of projects does Castle Builders specialise in?
We specialise in high-spec extensions, loft conversions, new builds, and full home refurbishments with bespoke designs.
How long has Castle Builders been in business?
We have been delivering quality construction projects since our establishment in 1980, with over 40 years of experience.
Can Castle Builders handle both design and construction phases?
Yes, we offer a complete design & build service, working with chartered building consultancies from concept to completion.
How does Castle Builders ensure project quality?
We collaborate with experienced local craftsmen and maintain direct director involvement throughout every project phase.