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Business Details
46 Years
experience
Expert Construction Services in St Albans
Established in 1980, Castle Builders has consistently delivered high-quality residential construction projects across St Albans, North London, and surrounding areas. As a family-run business with over 40 years of experience, we specialise in hi-spec extensions, new builds, renovations, and loft conversions. Our commitment to excellence is achieved through collaboration with highly trained local craftsmen, ensuring superior results for every project.

We maintain open and honest communication throughout the construction process, fostering long-term client relationships and a strong referral network. With over 400 completed projects, our reputation for quality and reliability is built on decades of consistent performance and client satisfaction.
Services
Hi-spec extensions Loft conversions New builds Refurbishments Design & build
Details
  • Year established: 1980
Highlights and features
  • 40+ years of experience in residential construction
  • Family-run business with proven reliability
  • Collaboration with local craftsmen for superior quality
  • 400+ completed projects in St Albans region
  • Direct collaboration with chartered building consultancies
What people say
Top quality residential building Excellent quality Delighted with results Highly recommend Collaboration with architect
Services
Hi-spec extensions
We specialise in high-specification residential extensions including side, rear, and two-storey designs. Our team handles installations like bi-fold doors and underfloor heating while guiding clients through every stage from planning to completion. With over 400 projects completed, our expertise ensures seamless integration with existing properties while meeting modern living requirements.
Loft conversions
Our comprehensive loft conversion service covers design, planning, and construction including structural steelwork and electrical installations. We customise spaces to create functional rooms while maintaining building regulations compliance. Collaborating with chartered building consultancies ensures optimal use of space and maximum property value enhancement.
New builds
We deliver bespoke new build projects combining innovative design with expert craftsmanship. From concept development to final decoration, our process incorporates architectural partnerships and quality materials. Our focus on precision and client collaboration has established a strong reputation for creating high-standard residential properties across St Albans.
Refurbishments
Our refurbishment services transform existing spaces through structural modifications and interior upgrades. We handle complete floorplan reconfigurations, including steelwork installations and en-suite additions. With experienced decorators and a focus on quality finishes, we ensure every renovation project achieves both functional improvements and aesthetic excellence.
Design & build
We offer integrated architectural design and construction services through partnerships with respected local consultancies. This approach streamlines projects from feasibility studies to building regulations approval. Our end-to-end management ensures cohesive execution while maintaining open communication with clients throughout every project phase.
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.
Luke Scullion
Director
As co-director, Luke manages operational aspects of projects while maintaining the company's focus on excellence. He works closely with clients to deliver tailored construction solutions that meet specific requirements.
Questions
What construction services do you offer?
We specialise in hi-spec extensions, loft conversions, new builds, refurbishments, and full design & build projects across St Albans and surrounding areas.
How long have you been operating?
Castle Builders has delivered residential construction projects since 1980, with over 40 years of experience and 400+ completed developments.
What areas do you cover?
We primarily serve St Albans, North London, and surrounding regions, with completed projects across Hertfordshire and the Home Counties.
How do you ensure project quality?
We work exclusively with experienced local craftsmen and maintain direct oversight throughout construction, ensuring adherence to our high standards.
Can you handle complete project management?
Yes, through our design & build service, we manage projects from initial concept through planning to final completion, working with chartered building consultancies.