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Interior view of a bright, modern attic conversion with white walls and wooden flooring

Loft conversions expertly handled from start to finish, serving Portsmouth, Drayton and across West Sussex

All trades under one roof. Free home surveys and quotes. TrustMark and FSB accredited for your peace of mind.

What makes us stand out

Our in-house architectural expertise

Specialist staff manage technical drawings and planning applications to ensure every build meets local regulations.

Our showroom for inspiration and advice

Visit the local showroom to explore material samples and receive professional guidance for your project.

Full project management provided

A dedicated lead coordinates all trades and timelines to ensure a smooth, stress-free construction experience.

Transform your loft into a bright, liveable space

B H I Building Services turns your unused loft into a functional, inviting part of your home. Serving Portsmouth, Hayling Island, Chichester, and beyond, we manage the whole process, from the initial consultation through to the final handover. We design every conversion around your property’s unique shape, maximising headroom and natural light. We specialise in transforming unused loft space into functional living areas, adding significant value and usable space to your property without the need to extend outward. 

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These conversions are ideal for creating new bedrooms, home offices, or additional living spaces tailored to suit your specific requirements. Our designs focus on maximising natural light and headroom wherever possible to ensure a comfortable environment. You benefit from a fully managed service from design to completion, with all work built to meet current building regulations and safety standards.

Spacious open-plan loft conversion featuring white sloping ceilings and multiple integrated roof windows
contemporary bedroom created from a loft conversion with soft lighting and a roof lantern
- Brad S, Yell
Outstanding work! Highly recommend I recently used BHI Building Services to fit my new kitchen, and I cannot recommend them highly enough. From the initial consultation to the finished product, the team was professional, efficient, and responsive to my needs. Their attention to detail was impressive, and they were always happy to answer any questions I had along the way. In addition to the kitchen installation, they also carried out other building works at my house and again, their standard of work was exceptional. They were diligent in their approach, ensuring that everything was completed to the highest standard and within budget. Overall, I am absolutely delighted with the work that BHI Building Services carried out at my property. I would not hesitate to use them again in the future and would recommend them to anyone looking for reliable, high-quality building services. Thanks again to the team for a job well done!

Our step-by-step loft conversion process

We specialise in various conversion styles to suit different roof shapes and planning requirements. Whether you require more floor space or a simple rooflight transformation, our in-house team handles all structural alterations and steelwork to ensure a solid foundation for your new room. Our services include the installation of Dormer, Velux, and Hip-to-gable loft conversions, alongside all necessary structural alterations and steelwork. We manage the entire staircase design and installation process to ensure seamless access to your new floor. 

 

Our team also takes care of insulation, roofing, and window installation, as well as all internal plumbing, electrics, plastering, and finishing work. To make the process easier, we provide full assistance with planning permission and building regulations.

Why a loft conversion is the smart choice

From your first call, B H I Building Services arranges a site survey to discuss your ideas and assess feasibility. Our in-house team handles the design and layout planning, including support with any planning permission. We deliver detailed quotations and clear timelines so you know what to expect.

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The journey begins with an initial consultation to discuss your ideas and the feasibility of the project, followed by a thorough site survey and loft assessment. We then move into the design and layout planning phase, providing support with planning permission if it is required for your property. Once a detailed quotation and timeline are provided, construction is carried out by our experienced team. We provide regular updates and full project management throughout the build, concluding with a final inspection and handover.

Time to unlock your loft’s potential?

Speak with us now to arrange your free home survey for loft conversions.

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