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CGP Extensions

A cleverly designed home extension is one of the best ways to create additional living space and also add long term value to your home. Whether you need more space for your family, or just want to make better use of your home, an extension can provide the flexibility you need to enjoy your living space.


At CGP Build, we deliver superior home extensions that combine exceptional craftsmanship with meticulous planning and professional project management. We can deliver single-story extensions as well as side returns to double-story additions and large open-plan living spaces, we manage every stage of the build with precision and our more than 100 years experience.

Every extension  project begins with us understanding your vision. CGP Build will take the time to discuss your requirements, budget, and expectations before developing a clear plan that ensures your project runs smoothly from start to finish. We offer not only a Guaranteed Maximum Price, as well as a guaranteed end date.

Throughout the construction process, our experienced team maintains open communication, keeping you informed at every stage while delivering work to the highest standards.

CGP Build will give you a Guaranteed Maximum Price and a Guaranteed end date for your project.

Find out more about our Guaranteed Maximum Price

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Frequently Asked Questions

Explore our approach to designing and building high quality extensions with minimal disruption to your home.
  • Yes. In most home extension projects, clients remain safely in their homes throughout construction. The on site team installs sealed dust barriers, maintains temporary weather protection, and keeps essential utility services running to minimise disruption, scheduling structural knock throughs during defined phases.
  • Many single storey rear and side extensions fall within Permitted Development rights, requiring only a Lawful Development Certificate and Building Regulations compliance. Double storey additions, wraparound designs, and extensions within designated Conservation Areas, National Parks, or Areas of Outstanding Natural Beauty typically require full planning permission, which our in house architectural team manages from start to finish.
  • CGP Build conducts trial pit excavations, soil load bearing evaluations, and existing foundation assessments during the pre construction phase. This diagnostic work ensures foundation designs and drainage plans meet Building Regulations requirements without causing unexpected price increases later on.