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J.M.B Design and Build Ltd are a leading house extension builder in Potters Bar.

We have constructed a range of house extensions in Potters Bar, from single-storey all the way through to multi-storey extensions.

Previous Potters Bar building projects have taken place on Thornton Road, Byng Drive and Borough Way.

Are you considering a house extension in Potters Bar?

Why choose JMB?

  • Award-winning building contractor

  • Decades of combined experience

  • Highly regarded in Potters Bar

  • Never comprising on quality

  • Over 50 five-star reviews

  • Highly skilled architects

  • Highly skilled builders




More information on house extensions with JMB Design and Build

Looking to expand your living space in Potters Bar?


Look no further!


JMB Design and Build is an award-winning building contractor serving various Hertfordshire and North London areas, including Potters Bar.


We offer premium house extension solutions tailored to your bespoke needs.

Our expert team specialises in crafting seamless house extensions that not only enhance your living space but also add value to your property in Potters Bar.


Whether you crave a stylish kitchen extension, a spacious loft conversion, or a functional home office addition, we've got you covered.

Why choose JMB Design and Build for your house extensions in Potters Bar?

  • Award-winning expertise: With years of experience and accolades in the industry, we deliver unparalleled craftsmanship and quality.

  • Tailored solutions: We understand that every homeowner in Potters Bar has unique requirements. That's why we work closely with you to design and build extensions that match your vision and lifestyle.

  • Local expertise: As a trusted name in Hertfordshire and North London, we deeply understand the local regulations and architectural styles, ensuring smooth project execution from start to finish.


Previous Potters Bar House Extension Projects


Borough Way, Potters Bar

Our client instructed us to construct a rear extension at this Potters Bar property.

The extension and entire refurbishment included an open-plan kitchen, tiling and underfloor heating.


Byng Drive, Potters Bar

Our client’s family home was a modest 3-bedroom property based in Potters Bar, with the potential for a loft conversion.

This project turned unused property space into a spacious master bedroom with an en-suite, enabling our clients to enhance their living space while increasing their property value.


Thornton Road, Potters Bar

We undertook a complete refurbishment of the internal and external for this Potters Bar based cottage. The client spoke to us about their ideas and we were able to redesign the whole of the ground floor creating a spacious open living/dining area, a modern Kitchen and cloakroom.

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