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At J Harris Building Ltd, we've built our livelihoods on remodeling people's homes. From the simple to the lavish, we've experienced it all and we can help you every step of the way. No job is too small or too big for our knowledgeable builders. We've happily done it all for 4 generations.

J Harris Building Ltd are 4th generation building contractors specialising in home extensions, loft conversions and all aspects of building work within Hertfordshire and surrounding areas.

Contact - 

Office - 01438 216138

Mobile - 07890681129

Email - info@jharrisbuilding.com

Testimonial - Knebworth, Hertfordshire - Large 3 storey rear, side and loft extension plus renovation works to existing house.

James is an extremely professional and knowledgeable builder. He ran the entire build very well, managing all aspects from start to finish and was on call at any time during the entire 6 month build. His technical knowledge and attention to detail was exceptional. James and team can clearly handle both small and very large builds. James and team were very friendly throughout and James's knowledge and attitude made him very easy to work with. We would highly recommend as a quality builder - Checkatrade.com