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Serving St Albans and surrounding area since 1980


Rear extension and kitchen project - Sandpit Lane, St Albans

'From the outset of the project we were impressed by Ray Scullion and his team.  At all times, they were genuinely a joy to work with.  For a complex project, we always found Ray to be on top of the details, well planned and co-ordinated.  All of the work undertaken was of an excellent quality, and clearly Castle Builders pride themselves on delivering to extremely high standards.  Ray took a personal interest in working with us and our architect where opportunities arose to further enhance plans through imaginative solutions.  Indeed, his excellent collaboration with our architect helped bring in the project on time, on budget and exceeding our expectations in terms of quality.  We would have no hesitation in using Castle again (and have done so recently) and would certainly recommend unreservedly.'

— John and Rachel

Rear extension and internal refurb -  Battlefield Road, St Albans


We wouldn’t hesitate to recommend Ray and his team to anyone considering an extension to their home. The whole team is very friendly and considerate which was particularly important to us as we lived in the house during the works. Ray remained calm and positive throughout the whole job with a real “can do” attitude to everything. We’re absolutely delighted with how it’s all turned out and with the quality of the work.


— Liz and Andy



Years Operational


Projects Completed in and around St Albans

Quality local tradespersons working for Castle Builders for 10+ years

Family Run

Sponsoring the local youth football team with our customer.

Established in 1980, Castle Builders has consistently been delivering top quality residential building projects across St Albans, North London and surrounding areas for over 40 years. 

Castle Builders is family run, has expertise in every area of construction, and specialises in hi-spec extensions, new builds, renovations and loft conversions.

Our standards are high and we achieve superior results because we work with exceptionally trained and experienced local craftsmen. We collaborate throughout the construction process to provide innovative, efficient and contemporary builds throughout St Albans.


Since our inception, our goal has been to provide our clients with open and honest collaboration throughout the construction process. This has resulted in long-term relationships with our clients, who often refer us to their friends and acquaintances, creating a powerful word of mouth network.

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