
House Extensions in Westbury
J Dell Builders designs and builds bespoke house extensions in Westbury and Trowbridge, creating bright, functional spaces that blend seamlessly with your home while adding comfort, value, and lasting appeal.
Bespoke House Extensions Built with Care
House extensions offer a practical solution for homeowners seeking to enhance their living space without the hassle of moving. Adding rooms, expanding existing ones, or even building additional floors, these home renovations cater to growing families, home office needs, or lifestyle changes. They’ll increase your property’s functionality and comfort and instantly boost its market value.
J Dell Builders’ approach to these property improvements is meticulous and professional. We understand the importance of thoughtful planning and design to ensure the extension seamlessly blends with the original structure, enhancing its aesthetics while adhering to local building regulations and budget constraints.
Ultimately, our designs offer a versatile and personalised way to optimise and modernise your home in Westbury, Trowbridge, or the surrounding areas we cover.
Which Style to Choose?
Examples of the house extensions our experienced builders design and build for homeowners are available to view in our website gallery and include:
Side-Return Extensions
These utilise the narrow strip of land alongside a house, typically found in Victorian or Edwardian properties. By extending into this underused space, homeowners can significantly increase their kitchen or living area, creating a more open, functional layout while maintaining the property’s character and maximising available space.

Rear-Facing Extensions
Rear-facing extensions involve extending the back of a house into the garden or patio, creating additional space for kitchens, living rooms, or dining areas. This style enhances the connection between indoor and outdoor spaces, allowing for more extensive, open-plan designs that increase natural light and improve overall home functionality.

Wraparound Extensions
These house extensions combine side-return and rear-facing extensions to maximise space at the back and side of a house. Ideal for creating expansive, open-plan living areas, they enhance the flow between different home sections, also increase natural light, and offer significant additional space while maintaining the property’s original charm.

Double-Storey Extensions
Double-storey extensions add two levels to your Westbury home, providing substantial additional space upstairs and downstairs. This design is ideal for expanding living areas, creating extra bedrooms, or adding bathrooms. It significantly enhances the property’s functionality and value while maintaining a cohesive flow with the existing structure.

Over-Structure Extensions
These extensions involve building additional rooms or spaces above existing structures, such as garages or single-storey extensions. This approach maximises vertical space without expanding the home’s footprint, providing extra bedrooms, home offices, or bathrooms. Over-structure extensions are a practical solution for adding space in densely built areas around Trowbridge.

J Dell Builders
We’re on hand from the very start of the project to the final touches. We collaborate closely with architects and local authorities to ensure all house extensions constructed comply with building regulations and match your requirements and budget. Our builders also offer complete project management facilities and a one-year workmanship guarantee.
FAQs – House Extensions
Do I need planning permission for a house extension?
It depends on the size and design. Many extensions in Westbury and Trowbridge fall under permitted development rights, meaning planning permission isn’t always required. However, larger or double-storey extensions, work on listed buildings, or projects near boundaries may need approval. J Dell Builders can advise and assist with all planning applications.
What building regulations apply to home extensions?
All extensions must meet UK Building Regulations for structural safety, insulation, ventilation, fire safety, and electrical and plumbing standards. We work closely with local building control officers to ensure every extension is fully compliant from foundation to finish.
How much value will a house extension add to my home?
A well-designed extension can add between 10% and 25% to your property’s market value, depending on location, quality, and layout. Beyond value, it improves functionality, comfort, and everyday living, often making it a better investment than moving home.
Can I live in my home while the extension is being built?
Yes, in most cases. For smaller or single-storey extensions, disruption is minimal, and we always plan work around your routine. For larger projects, you might choose to move out temporarily, but we’ll discuss all options in advance to make things as convenient as possible.

Contact Us
For house extensions in Westbury, Trowbridge, and the surrounding areas, speak with a trusted builder at J Dell Builders today on 01373 865110. We look forward to working with you!