Hill Grwp Ltd
Engineering the Future of Infrastructure - Since 1980's
Hill Grwp is proud to be at the forefront of designing and manufacturing bespoke equipment and products for a diverse range of industrial and commercial services and needs, for niche requirements and mainstream necessities.
Our commitment to quality and customer satisfaction has established us as a leader in the sector and a trusted, go-to partner for industry leaders across multiple sectors due to our knowledge and understanding of the needs of our customers.
Switchgear Substations and Oil & Gas Metering Housing
Pre-Packaged Sprinkler Pump Rooms
TopBox Roof Entry Kiosk
GRP Weatherproof Housing and Enclosures
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We manufacture high-performance GRP enclosures designed for industrial use across the UK.
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Weatherproof & durable – built for harsh environments
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Fire-rated & acoustic options – for safety and compliance
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Custom sizes & specs – tailored to your project needs
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Ideal for utilities, energy, and commercial sectors
Fully assembled fire protection systems, engineered for fast installation and long-term reliability.
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Compliant with UK fire safety regulations
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Factory-built & pre-tested for performance assurance
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Quick installation with minimal on-site disruption
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Customisable layouts to fit any building requirements
Switchgear Substations
Robust GRP and steel enclosures built for critical infrastructure and energy applications.
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Weatherproof & durable for harsh industrial environments
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Customised for switchgear & metering systems
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Integrated LV services: lighting, HVAC, and surge protection
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Compliant with UK utility & safety standard
Engineered GRP access units for safe, weatherproof rooftop entry.
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Ideal for ductwork, cabling & HVAC installation
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Secure & compliant access for commercial buildings
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Durable GRP construction with fire-rated options
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Streamlines rooftop projects with safer working zones
Hill Grwp delivers high-performance GRP weatherproof housings, modular switchgear substations, and pre-packaged sprinkler pump rooms built for the UK’s industrial, utility, and commercial sectors.
Our expertise in custom GRP enclosures, from roof access systems to fire-rated acoustic units, ensures fully compliant, factory-built solutions delivered with precision.
Trusted across Swansea, Wales, and the UK, we provide low-maintenance, durable enclosures designed for fast installation and long-term performance.
Contact us
+44 1792 899177
OUR CLIENTS
We believe every client is a valuable long-term partner.
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Frequently Asked Questions (FAQs)
Who are Hill Grwp Ltd?
Hill Grwp Ltd are specialists in the design and manufacture of bespoke GRP enclosures, kiosks, and modular buildings for infrastructure and construction projects across the UK.
What do you manufacture?
We design and manufacture fully bespoke structures including GRP kiosks, modular buildings, sprinkler pump rooms, and utility enclosures, tailored to meet specific project requirements.
Can your buildings be customised?
Yes. Every unit is designed around your project, including size, layout, access, ventilation, and internal fit-out. We don’t offer “off-the-shelf” limitations, everything is built to suit.
Why choose a factory-built solution?
Factory-built units reduce on-site labour, improve quality control, and significantly speed up installation, helping you minimise risk and keep projects on programme.
Do you only work with GRP?
No. While GRP is our core expertise, we also offer steel and hybrid solutions, including repurposed containers, depending on what best suits your project.
Hill Grwp partners with leading industrial suppliers across the UK to support our delivery of high-quality GRP housings, packaged pump rooms, metering units, and switchgear enclosures.
If you supply materials, components, or services for the construction, oil & gas, utilities, or infrastructure sectors — we want to hear from you.
Join our approved supplier network and collaborate on delivering innovative, cost-effective, and compliant solutions across our industrial and commercial projects.
FAQs
Production Information
What types of enclosures do you manufacture? We manufacture custom industrial GRP enclosures, steel-framed housings, and prefabricated utility enclosures UK-wide for use in switchgear, metering, rooftop access, and fire protection systems. Our GRP weatherproof housings and fire-rated GRP enclosures are built to perform in tough industrial environments.
What is the TopBox roof access kiosk? TopBox is our GRP roof access system designed to provide safe and secure entry to plant rooms, rooftop equipment, and service areas. As a modular, weather-resistant kiosk, it offers a durable and low-maintenance solution for industrial and commercial buildings. The TopBox GRP roof access unit can be customised to meet your project’s layout, safety, and compliance needs.
Are your GRP enclosures fire-rated or acoustic? Yes — we offer both fire-rated GRP enclosures and acoustic GRP housings designed for industrial and utility applications. These enclosures are tested to meet UK safety regulations and are ideal for environments that require noise reduction, fire protection, and durable weatherproof performance.
Customisation Delivery
Can you design a custom housing solution? Yes, we specialise in bespoke GRP housing for utility infrastructure, offering factory-built GRP housing units with optional HVAC, lighting, acoustic insulation, and fire protection.
Do you install the enclosures on site? Yes — we offer UK-wide delivery and installation for all our GRP utility enclosures, modular switchgear housings, and pre-packaged sprinkler pump rooms. Our experienced team ensures each system is installed safely, efficiently, and in full compliance with UK building and utility regulations.
Can internal layouts be customised? Yes. Internal layouts can be configured to suit transformers, switchgear, LV panels, cable entries, and ventilation requirements.
Safety Regulations
What standards do your buildings comply with? Our buildings are designed to comply with relevant BS, EN, and IEC standards, including structural, fire, and electrical requirements where applicable.
Are your GRP buildings fire rated? Yes. GRP panels are manufactured to meet specified fire performance standards, including surface spread of flame requirements where required.
Do your buildings comply with Building Regulations? Where applicable, buildings are designed to comply with relevant sections of the Building Regulations, including fire safety requirements.