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Side Extension Ideas

4th June 2018

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If you have a new room, we have plenty of side extension ideas to help you personalise your new room. Ensuring it complies with planning permission is an essential part of obtaining and installing your new room. Read below for more information about side extension ideas and planning permission.


If your home is smaller than you wanted, a side extension is an ideal solution for you. Creating another room inside your home, our side house extensions bring ample amounts of light and ventilation, making it perfect for you.

With stunning lines and clean aesthetics, the side house extension you install will be full of light, creating a modern kitchen for you to use. Choosing to incorporate beautiful bi-fold doors means you are supplying your home with incredible ventilation.


A popular idea used by our customers is to install a roof lantern. By doing this, you will not only be benefitting from a wealth of added light but also a stronger roof, with stunning views to enjoy during the day and night!

Installing a roof lantern in your home is a great way of increasing the amount of natural light that enters your home, as well as adding value to your property, improving its aesthetic appeal.


One way to add a bit more to the personality of your home is to make your new room different from the rest of your home. Contrasting the design and brightness using stairs, windows and doors can make your home more interesting, adding value to the property.


Enjoy a space that’s built with light and comfort in mind, while also delivering incredible aesthetics that people are bound to remark upon. Each one will include:

Super-Insulated Columns

Our super-insulated columns deliver thermal efficiency levels five times higher than a brick pier built to the same size specification. Larger columns will sit at the corners and smaller inline ones will complete the sequence in between.

Create a classic or contemporary new room by opting for a flat or fluted design. Our super-insulated columns can even sit on top of a dwarf wall, meaning you’ll be able to achieve a traditional design that’s powered by truly modern performance.

Internal Insulated Pelmet

Your internally-plastered super-insulated columns will work beautifully with our insulated pelmet, which can also accommodate bi-fold doors and accept the installation of speakers and spotlights – resulting in a room that feels comfortable always.

You can customise your new room by choosing a colour scheme, thereby ensuring consistency of design throughout.

You can also increase the width of the room by opting to install our Ultrasky Roof instead of the Classic (a width of 6.5m is possible). Adding a decorative cornice hides your guttering from view.


Choose an extension that uses a solid conservatory roof like no other. You’ll be amazed at the amount of control you’ll have over the light. Each one will include:

A hybrid design that’s glazed and solid.

With Livinroof, you’ll be able to focus illumination where it’s most needed. Even better than that, you’ll be able to ask your Ultra Installer to shape the glazing into any format.

Outstanding contemporary design.

Streamline the external appearance of the structure with a decorative cornice. Add super-insulated columns for dimension and style. Having contemporary grey panels on the roof enhances its modern appearance. You can even remove internal doors making your modern new space more accessible.


Similar in some ways to the Livinroof, this is an extension that draws on the benefits of glass and tiled conservatory roofs to deliver incredible performance and visuals.

Full-height glazing can be used to ensure your room’s never too dark; Velux windows can be substituted, depending on your preference.

The high-performance glass in your Ultra roof will block out most solar rays and make your room thermally efficient.

Customise your Ultraroof House Extension by selecting one of three tiled colours and improve your roofline further by adding a curved decorative cornice to hide guttering.

Super-insulated columns and an insulated pelmet will help you build a traditional-looking or contemporary room for entertaining and family time.


In almost all cases, planning permission is needed when the side of a home is being extended.

Before you build your new room, you will need to make sure that:

    • If you live on designated land – including national parks and area of outstanding beauty – you cannot build a side house extension.
    • Your proposed development isn’t built beyond the principal or side elevation, in the event that it’s facing on to a highway.

Otherwise, consent should be granted, as long as:

    • The width of your home is not greater than half the width of your original home.
    • Your proposed build is single storey and does not exceed 4 metres in height.
    • The materials used in your new extension match those used inside your home.

Other rules and restrictions may apply so ensure you check them before installation. To find out about any other rules and restrictions that may apply, simply ask your approve Ultra Installer.

Take a look at more side extension ideas from the Ultraframe gallery. To hear more about the range of extensions we provide or discuss any side extension ideas you have, get in touch with us today.


Building Regulations may apply to your proposed house extension design. These rules exist separately to planning permission and broadly cover:

    • Access into and out of a building, so that is safe
    • Windows, doors and roofs
    • Electrical systems
    • Drainage

Please speak to the department at your local authority if you want advice about building regulations or refer your queries to your approved Ultra Installer

Contact Your Nearest Installer

Use our search tool to find a trusted installer near you. In the meantime, use our VR tool to take a closer look at our house extensions, conservatories and orangeries.

If you like a particular image, save it to your Scrapbook – which you can access anytime: at home, at work or when you’re on the move.

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A Message To Our Customers

As a result of listening to our customers as well as broad consultation with industry stakeholders, we have now reopened the Ultraframe factory whilst following government guidelines and maintaining social distancing to ensure the safety of our staff and their families.

While some Ultraframe installers may not be fitting new conservatories / extensions at the moment, some of the installers are able to respond to enquiries and are operating their sales and office functions safely from home.

If you are spending your time at home planning for ways to enhance your living space you can still search on our website for ideas and solutions and find your nearest Ultraframe installer. Some Ultraframe installers may be able to advise you via phone or online consultations.

Please stay safe and we will return to normal business just as soon as it is safe to do so.

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