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.


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.

