Why Choose hup!: Chester's smarter alternative to traditional brick extensions

The hup! system is not simply another way to build an extension. It is a fundamentally better one.

hup! by Fortress delivers rapid-build extensions across Chester and Cheshire using a precision-engineered Ultrapanel system that outperforms traditional brick and conventional SIP construction on speed, thermal performance and build quality.

Five times faster to build

Five times faster to build

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Design flexibility

Ultimate design flexibility

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Energy efficient

Five times more energy efficient

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High quality

High quality finish every time

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Hassle free

One supplier, one project

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Low carbon

60% more carbon efficient

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The faster, warmer, quieter alternative to traditional brick extensions in Chester icon

Ultimate design flexibility

The faster, warmer, quieter alternative to traditional brick extensions in Chester

hup! by Fortress delivers rapid-build extensions across Chester and Cheshire using precision-engineered SIP panels that outperform traditional brick on speed, thermal performance and build quality.
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Speed: built in days, not months icon

⁠Five times faster to build

Speed: built in days, not months

One of the most compelling reasons Chester homeowners choose hup! is the speed of construction. While a traditional brick extension can take 12 to 20 weeks or more, a hup! extension is typically weather-tight within days of the panels arriving on site.

Off-site manufactured to exacting tolerances, our Ultrapanels are manufactured off-site and arrive ready to assemble, dramatically reducing the time your home is disrupted by building work.

For busy families in Frodsham, Ellesmere Port and across Cheshire, that difference in build speed is not just convenient: it changes the experience of extending your home entirely.

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Less disruption: a cleaner, quieter build icon

One supplier one project

Less disruption: a cleaner, quieter build

Traditional construction is inherently messy and unpredictable. Wet trades, variable weather and lengthy programmes make the experience of extending a Chester home stressful for the whole household.

hup! by Fortress delivers a fundamentally different build experience. Our off-site manufactured panels arrive at your Cheshire or North Wales property pre-cut and ready to assemble, meaning the on-site phase is clean, fast and controlled.

With fewer wet trades, less scaffolding time and a faster programme overall, hup! extensions in Chester are built with a professionalism and precision that traditional methods cannot match.

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A perfect build every time icon

High quality finish

A perfect build every time

hup! is manufactured under tightly controlled conditions in a BBA approved factory and the patented Ultrapanel technology used in hup! is BBA approved and is awarded their maximum lifespan of at least 60 years. Advanced manufacturing software means that every hup! component will fit together quickly and easily, every time, and so you are assured of a perfect build.

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Thermal performance: warmer homes, lower bills icon

⁠Five times more energy efficient

Thermal performance: warmer homes, lower bills

Traditional masonry walls allow heat to escape at rates that modern homeowners cannot afford. hup! by Fortress uses Ultrapanel system with a continuous high-performance insulation core that outperforms standard structural insulated panel (SIP) construction, keeping your Chester home warmer for longer. The closed-panel construction eliminates cold bridges, the hidden weak points in traditional construction where heat leaks out and cold air creeps in. The result is an extension that feels genuinely comfortable in all seasons. For homeowners in Saltney, Tattenhall, Wrexham and across the Cheshire plain, where winter temperatures can bite, the thermal advantages of hup! are a significant and measurable benefit.
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Thermal performance: warmer homes, lower bills

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hup! technology

The Ultrapanel technology at the heart of hup! is ground-breaking.

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hup! walls

hup! walls are energy efficient, fast to build and can be placed anywhere in your design.

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hup! roofs

Choose from four hup! roof systems for complete design flexibility.

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Windows & doors

hup! is compatible with a choice windows and doors.

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Illustration of breakdown of components in hup! roofs

Wall Finishes

hup! is compatible with any external wall finish of your choice.

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Accreditations & Approvals

hup! has been independently tested for its strength, thermal performance, fire resistance and quality to provide you with complete peace of mind. Learn more about each of the approvals and download the relevant certificates.

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Building Regulations

hup! is pre-approved for Building Regulations, this makes compliance extremely fast and simple. Stroma, MFA and Assent are independent Building Control inspectors and they have pre-approved the hup! system to make Building Regulation compliance simple.

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Logo of hup!'s approval certificates with Assent, MFA and Stroma
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We are proud to be part of the hup! Partner Network.

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