The best fully bespoke service available and a whole lot more...

We provide a free no obligation quotation, 3D Visuals, guidance through planning issues,

10 year guarantee on all installations plus provide full after-sales support.

Whilst Hallmark specialise in Seasoned Oak Glazed Extensions, we can also provide alternative premium Hardwoods and Aluminium frame solutions.

If you’re considering having a glazed extension such as a conservatory or orangery built for your home, it’s important to make the right design choices so your new extension is right for YOU!

Choose the right glazed extension for you

Understand how climate changes affect the internal temperature

Decide on which frame materials will complement your home best

Understand the pricing structure of extensions

Figure out if you need planning permission or any other building permissions

Understand the different kinds of legal requirements including Listing Building Consent

Ensure you have the right lighting for your home

With over 30 years of experience, our designers have worked on every kind of home you can think of and have specialist knowledge of Listed Buildings.

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Our Buyer's guide will help you understand all the different things you need to take into account when planning your conservatory or orangery. 

Simply click on the 'Download Guide' button below to get your free Buyer's Guide now. 

Download Guide

Cool & Comfortable in the summer

Warm & Cosy in the winter

Your FREE buyers guide will show you how to:

...And Much more!

Our FREE buyer's guide will help you make the right decision so you get the stunning living space which is perfect for you and your circumstances!

Download FREE Buyers Guide

Watch our video

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