Hawksbeck Annexes - Sustainable By Design
That’s why our garden annexes are not only crafted to be beautiful, functional, and durable but are also designed with the planet in mind. Through sustainable materials, energy-efficient technologies, and thoughtful construction processes, Hawksbeck Annexes are setting the standard for eco-friendly living.

Building Smarter: 65% Less Timber
Our use of Structural Insulated Panels (SIPs) allows us to cut timber usage by 65% compared to traditional builds. This modern approach reduces pressure on forests and helps conserve valuable natural resources.
SIPs are not only more sustainable, but they also deliver excellent structural integrity and energy efficiency, making them the smarter, greener choice.
A Carbon-Neutral Start
The sustainability journey of a Hawksbeck annexe begins at our carbon-neutral production facility.
Every SIP panel is manufactured with zero net carbon emissions, ensuring that each structure has a minimal carbon footprint from day one.
By choosing Hawksbeck, you’re investing in a living space built with the planet’s future in mind.
Built for the Future: 100% Recyclable
Our SIP panels are proudly classified as eco builds, meaning they are 100% recyclable.
This commitment ensures that every Hawksbeck annexe supports a more sustainable future by using materials that can be recovered and reused.
Choosing a Hawksbeck annexe means investing in a high-quality, environmentally responsible space designed to minimise waste and make a positive impact.
Eco-Friendly Comfort: Zero ODP Insulation
Energy efficiency is vital to sustainability. Our SIP panels incorporate insulation with zero ozone depletion potential (ODP) and zero global warming potential (GWP).

Cleaner Construction: 90% Less Waste
Traditional building methods often generate large amounts of waste on site. Hawksbeck’s off-site manufacturing process drastically reduces this, producing up to 90% less site waste. By cutting materials precisely in a controlled factory environment, we minimise offcuts and ensure resources are used efficiently. This cleaner, greener process means less waste going to landfill and a smaller environmental footprint for your project.
A Greener Future with Hawksbeck
Choosing a Hawksbeck annexe means investing in a building that’s as kind to the environment as it is to your lifestyle. From reducing waste and energy consumption to using recyclable materials and eco-friendly finishes, every step we take is designed to put the planet first.
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Hawksbeck Annexes
Kings House
101-135 Kings Road
Brentwood
Essex
CM14 4DR